CN113359120B - Method and device for measuring user activity distance and electronic device - Google Patents

Abstract

The embodiment of the application provides a method, equipment and electronic equipment for measuring a user activity distance, wherein in the method for measuring the user activity distance, after detecting that the contact state of a left foot and the ground is changed, a first measuring equipment acquires a first system time and an identification of the first measuring equipment, then modulates by utilizing sound waves, a modulated first sound wave signal is sent to a second measuring equipment configured on a right foot, the second measuring equipment acquires a first transmission duration of the first sound wave signal, and the first transmission duration is sent to the electronic equipment; then, the first measuring device receives the second sound wave signal sent by the second measuring device, and sends the second transmission time length of the second sound wave signal to the electronic device, so that the electronic device determines the moving distance of the user in two continuous steps according to the transmission time length and the propagation speed of sound waves, thereby measuring the moving distance of the user and improving the accuracy of measuring the moving distance of the user.

Description

Method, device and electronic device for measuring user activity distance

Technical Field

The embodiments of the present application relate to the field of smart terminal technology, and in particular to a method, device and electronic device for measuring user activity distance.

Background technique

As people's living standards continue to improve, their attention to health is also gradually increasing. Exercise is becoming more and more popular as a cost-effective lifestyle. According to public opinion surveys, the most popular and common sports are still running and walking. Elderly people can be seen walking and young people running everywhere in parks and residential areas. Running or walking to a certain amount will have a positive effect on health, but excessive running or walking will cause fatigue or even damage to the body. Therefore, there is a need for a scientific and accurate method to evaluate the amount of running and/or walking, among which the activity distance is an important parameter for evaluating the amount of exercise.

In order to truly reflect the user's activity, the standard measurement method for activity distance is to sum the strides. FIG1 is a schematic diagram of activity distance in the prior art. Taking FIG1 as an example, the activity distance of a user from point A to point B should be a curve distance, not a straight line distance.

Wearable devices have been making great efforts in the field of scientific sports in recent years, using inertial sensors to sense steps and thus measure the distance of activities. The common principles in the industry are as follows:

Step 1: Walking distance = number of steps × stride length; where stride length is obtained by multiplying height by a fixed empirical coefficient, and the empirical coefficient does not distinguish between age and activity type...

Step 2: Perform periodic corrections in conjunction with the mobile phone's Global Positioning System (GPS).

However, the above solution does not take into account the differences in stride lengths of different people. In indoor running scenarios, GPS signals are basically unavailable, and one must rely on the distance data of a treadmill. In outdoor sports scenarios, turning on GPS has a significant impact on the power consumption of the mobile phone, and is limited by the low precision and/or multipath effects of civilian GPS, which can cause inaccurate or missing measurement data.

Summary of the invention

The embodiments of the present application provide a method, device and electronic device for measuring the user's activity distance. The embodiments of the present application also provide a computer-readable storage medium to measure the user's activity distance through sound waves, without relying on a GPS module or empirical values. The activity distance of users from different groups of people and/or different activity scenarios can be measured, thereby improving the accuracy of the user's activity distance measurement.

In a first aspect, an embodiment of the present application provides a method for measuring a user activity distance, comprising:

After the user's left foot steps out and the first measuring device configured on the left foot detects that the contact state between the left foot and the ground has changed, the first system moment of the processor of the first measuring device and the identifier of the first measuring device are obtained; wherein the first measuring device can be various sports smart devices, including: wearable devices (for example: anklets or foot buckles, etc.), insoles or shoes, etc., and this embodiment does not limit the specific form of the first measuring device; in this embodiment, the sensor for detecting the change in the contact state between the foot and the ground can be a pressure sensor or an inertial sensor; generally speaking, pressure sensors are usually used in insoles and shoes, and inertial sensors are usually used in wearable devices, and this embodiment does not limit this.

The change in the contact state between the left foot and the ground can be: the left foot is in contact with the ground, or the left foot is off the ground; when the contact state between the left foot and the ground changes to the left foot in contact with the ground, it means that the left foot is the moving foot, and when the contact state between the left foot and the ground changes to the left foot leaving the ground, it means that the left foot is the supporting foot; that is, in this embodiment, the foot that triggers the activity distance measurement can be the moving foot or the supporting foot. The main basis is that the propagation delay of the sound wave is much smaller than the reaction delay of the human being;

The first system time and the identifier of the first measuring device are modulated by using sound waves; wherein the sound waves may be ultrasonic waves, audible sound waves, or hypersonic waves, and the specific type of the sound waves is not limited in this embodiment;

The modulated first sound wave signal is sent to the second measuring device configured on the right foot of the above-mentioned user, so that the above-mentioned second measuring device obtains the first transmission duration of the above-mentioned first sound wave signal according to the above-mentioned first sound wave signal, and sends the above-mentioned first transmission duration to the electronic device connected to the above-mentioned first measuring device and the above-mentioned second measuring device; wherein the above-mentioned second measuring device can also be various sports intelligent devices, including: wearable devices (for example: foot rings or foot buckles, etc.), insoles or shoes, etc., and the present embodiment does not limit the specific form of the above-mentioned second measuring device; the above-mentioned electronic device can be an intelligent electronic device such as a smart phone, a wearable device or a tablet computer, and the present embodiment does not limit the specific form of the above-mentioned electronic device; in specific implementation, after the first measuring device sends the first sound wave signal to the second measuring device, the second measuring device can demodulate from the above-mentioned first sound wave signal to obtain the above-mentioned first system time and the identifier of the above-mentioned first measuring device, and after determining that the first sound wave signal comes from the first measuring device according to the identifier of the above-mentioned first measuring device, obtain the current fourth system time of the second measuring device, and then the second measuring device can obtain the first transmission duration of the above-mentioned first sound wave signal according to the above-mentioned fourth system time and the above-mentioned first system time, and send the above-mentioned first transmission duration to the electronic device connected to the above-mentioned first measuring device and the above-mentioned second measuring device.

receiving a second sound wave signal sent by the second measuring device, wherein the second sound wave signal is sent by the second measuring device after the contact state between the right foot of the user and the ground changes, and the second sound wave signal includes a second system time of a processor of the second measuring device and an identifier of the second measuring device;

A second transmission duration of the second sound wave signal is obtained according to the second sound wave signal, and the second transmission duration is sent to the electronic device, so that the electronic device determines the activity distance of two consecutive steps of the user according to the first transmission duration and the second transmission duration, and the propagation speed of the sound wave in the air.

In the above-mentioned method for measuring the user's activity distance, after the user's left foot steps out and the first measuring device configured on the above-mentioned left foot detects that the contact state of the left foot with the ground has changed, the first measuring device obtains the first system time of the processor of the above-mentioned first measuring device and the identifier of the above-mentioned first measuring device, and then modulates the above-mentioned first system time and the identifier of the above-mentioned first measuring device using sound waves, and sends the modulated first sound wave signal to the second measuring device configured on the above-mentioned user's right foot, so that the above-mentioned second measuring device obtains the first transmission duration of the above-mentioned first sound wave signal according to the above-mentioned first sound wave signal, and sends the above-mentioned first transmission duration to the electronic device connected to the first measuring device and the second measuring device; then, the first measuring device receives the second sound wave signal sent by the above-mentioned second measuring device, and according to The second sound wave signal obtains the second transmission duration of the second sound wave signal, and sends the second transmission duration to the electronic device, so that the electronic device determines the activity distance of the user's two consecutive steps according to the first transmission duration and the second transmission duration, as well as the propagation speed of the sound wave in the air. This allows the activity distance of users from different groups of people and/or different activity scenes to be measured without relying on empirical values, thereby improving the accuracy of user activity distance measurement. The method does not rely on additional GPS modules and radio frequency modules, and is a low-power and low-cost solution. The method utilizes the human kinematic characteristics of the left and right feet moving forward interactively, and by measuring the activity distance of the user's two consecutive steps, the clock error between the first measuring device and the second measuring device is offset, thereby achieving clock-free synchronization.

In one possible implementation, obtaining the second transmission duration of the second sound wave signal according to the second sound wave signal includes:

Demodulating the second sound wave signal to obtain the second system time and the identifier of the second measuring device;

Determining whether the second sound wave signal comes from the second measuring device according to the identifier of the second measuring device;

If yes, obtaining the current third system time of the first measuring device;

According to the third system time and the second system time, a second transmission duration of the second sound wave signal is obtained.

In one possible implementation manner, after determining whether the second sound wave signal comes from the second measurement device according to the identifier of the second measurement device, the method further includes:

If the second sound wave signal does not come from the second measuring device, the second sound wave signal is discarded.

In a second aspect, an embodiment of the present application provides a method for measuring a user activity distance, including:

Receive a first transmission duration sent by a second measuring device, where the first transmission duration is a transmission duration of a first sound wave signal, the first transmission duration is obtained by the second measuring device according to the first sound wave signal, and the first sound wave signal is sent by the first measuring device configured on the left foot to the second measuring device;

Receive a second transmission duration sent by the first measuring device, where the second transmission duration is the transmission duration of the second sound wave signal, the second transmission duration is obtained by the first measuring device according to the second sound wave signal, and the second sound wave signal is sent by the second measuring device configured on the right foot to the first measuring device;

The activity distance of two consecutive steps of the user is determined according to the first transmission duration, the second transmission duration, and the propagation speed of the sound wave in the air.

In one possible implementation, determining the activity distance of two consecutive steps of the user according to the first transmission duration and the second transmission duration, and the propagation speed of sound waves in the air includes:

The electronic device calibrates the sum of the first transmission duration and the second transmission duration using the delay of the first measuring device modulating and demodulating the sound wave and the delay of the second measuring device modulating and demodulating the sound wave to obtain a calibrated transmission duration;

The activity distance of two consecutive steps of the user is determined according to the calibrated transmission time and the propagation speed of the sound wave in the air.

The electronic device is connected to the first measuring device and the second measuring device. The electronic device may be a smart phone, a wearable device, a tablet computer or other intelligent electronic device. This embodiment does not limit the specific form of the electronic device.

That is to say, in the process of sound wave modulation->sending->air transmission->receiving->sound wave demodulation, the processing delay of the hardware and/or software of the first measuring device or the second measuring device itself is included, so it is necessary to calibrate the sum of the first transmission duration and the second transmission duration. In this embodiment, the electronic device uses the delay of the first measuring device modulating and demodulating the sound wave, and the delay of the second measuring device modulating and demodulating the sound wave to calibrate the sum of the first transmission duration and the second transmission duration to obtain the calibrated transmission duration. In a specific implementation, the delay of the first measuring device modulating and demodulating the sound wave, and the delay of the second measuring device modulating and demodulating the sound wave, can be obtained in advance through calibration testing and stored in the above-mentioned electronic device.

In the above-mentioned method for measuring the user's activity distance, the electronic device receives a first transmission duration sent by a second measuring device, and receives a second transmission duration sent by the first measuring device, wherein the first transmission duration is the transmission duration of the first sound wave signal, and the second transmission duration is the transmission duration of the second sound wave signal; then the electronic device can determine the activity distance of the user's two consecutive steps based on the first transmission duration and the above-mentioned second transmission duration, as well as the propagation speed of the sound wave in the air, thereby being able to measure the activity distance of users of different groups and/or different activity scenes without relying on empirical values, thereby improving the accuracy of the user's activity distance measurement, and the above-mentioned method does not rely on additional GPS modules and radio frequency modules, and is a low-power and low-cost solution; and the above-mentioned method utilizes the human body's kinematic characteristics of the interactive movement of the left and right feet, and by measuring the activity distance of the user's two consecutive steps, offsets the clock error between the first measuring device and the second measuring device, thereby achieving clock-free synchronization.

In a third aspect, an embodiment of the present application provides a device for measuring a user's activity distance, wherein the measuring device is a first measuring device, and the measuring device comprises: a sensor; an acoustic modem; an acoustic transceiver; a communication module; one or more processors; a memory; a plurality of applications; and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, and when the instructions are executed by the measuring device, the measuring device performs the following steps:

After the user's left foot steps out and the first measuring device configured on the left foot detects that the contact state between the left foot and the ground changes, obtaining a first system time of a processor of the first measuring device and an identifier of the first measuring device;

Modulating the first system time and the identifier of the first measuring device by using sound waves;

Sending the modulated first sound wave signal to a second measuring device configured on the right foot of the user, so that the second measuring device obtains a first transmission duration of the first sound wave signal according to the first sound wave signal, and sends the first transmission duration to an electronic device connected to the first measuring device and the second measuring device;

receiving a second sound wave signal sent by the second measuring device, wherein the second sound wave signal is sent by the second measuring device after the contact state between the right foot of the user and the ground changes, and the second sound wave signal includes a second system time of a processor of the second measuring device and an identifier of the second measuring device;

A second transmission duration of the second sound wave signal is obtained according to the second sound wave signal, and the second transmission duration is sent to the electronic device, so that the electronic device determines the activity distance of two consecutive steps of the user according to the first transmission duration and the second transmission duration, and the propagation speed of the sound wave in the air.

In one possible implementation, when the instruction is executed by the measuring device, the step of causing the measuring device to obtain a second transmission duration of the second sound wave signal according to the second sound wave signal includes:

Demodulating the second sound wave signal to obtain the second system time and the identifier of the second measuring device;

Determining whether the second sound wave signal comes from the second measuring device according to the identifier of the second measuring device;

If yes, obtaining the current third system time of the first measuring device;

According to the third system time and the second system time, a second transmission duration of the second sound wave signal is obtained.

In one possible implementation, when the instruction is executed by the measuring device, the measuring device further performs the following steps after performing the step of determining whether the second sound wave signal comes from the second measuring device according to the identifier of the second measuring device:

If the second sound wave signal does not come from the second measuring device, the second sound wave signal is discarded.

In a fourth aspect, an embodiment of the present application provides an electronic device, including:

One or more processors; a memory; a plurality of applications; and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, and when the instructions are executed by the electronic device, the electronic device performs the following steps:

Receive a first transmission duration sent by a second measuring device, where the first transmission duration is a transmission duration of a first sound wave signal, the first transmission duration is obtained by the second measuring device according to the first sound wave signal, and the first sound wave signal is sent by the first measuring device configured on the left foot to the second measuring device;

Receive a second transmission duration sent by the first measuring device, where the second transmission duration is the transmission duration of the second sound wave signal, the second transmission duration is obtained by the first measuring device according to the second sound wave signal, and the second sound wave signal is sent by the second measuring device configured on the right foot to the first measuring device;

The activity distance of two consecutive steps of the user is determined according to the first transmission duration, the second transmission duration, and the propagation speed of the sound wave in the air.

In one possible implementation manner, when the instruction is executed by the electronic device, the electronic device executes the step of determining the activity distance of two consecutive steps of the user according to the first transmission duration and the second transmission duration, and the propagation speed of sound waves in the air, including:

Using the time delay of the first measuring device modulating and demodulating the sound wave and the time delay of the second measuring device modulating and demodulating the sound wave, calibrate the sum of the first transmission duration and the second transmission duration to obtain a calibrated transmission duration;

The activity distance of two consecutive steps of the user is determined according to the calibrated transmission time and the propagation speed of the sound wave in the air.

It should be understood that the third aspect of the embodiment of the present application is consistent with the technical solution of the first aspect of the present application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar and will not be repeated here.

It should be understood that the fourth aspect of the embodiment of the present application is consistent with the technical solution of the second aspect of the present application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar and will not be repeated here.

In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer-readable storage medium is run on a computer, the computer executes the method provided in the first aspect.

In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer-readable storage medium is run on a computer, the computer executes the method provided in the second aspect.

In a seventh aspect, an embodiment of the present application provides a computer program, which, when executed by a computer, is used to execute the method provided in the first aspect.

In an eighth aspect, an embodiment of the present application provides a computer program, which, when executed by a computer, is used to execute the method provided in the second aspect.

In one possible design, the programs in the seventh and eighth aspects may be stored in whole or in part on a storage medium packaged together with the processor, or may be stored in whole or in part on a memory not packaged together with the processor.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the activity distance in the prior art;

FIG2 is a flow chart of an embodiment of a method for measuring user activity distance of the present application;

FIG3 is a flow chart of another embodiment of a method for measuring user activity distance of the present application;

FIG4 is a flow chart of another embodiment of a method for measuring user activity distance of the present application;

FIG5 is a schematic diagram of an embodiment of a system block diagram on which the method for measuring user activity distance of the present application is implemented;

FIG6 is a schematic diagram of an embodiment of stride measurement in the method for measuring user activity distance of the present application;

FIG7 is a schematic diagram of an embodiment of delay calibration in the method for measuring user activity distance of the present application;

FIG8 is a schematic diagram of the structure of an embodiment of a device for measuring user activity distance of the present application;

FIG. 9 is a schematic diagram of the structure of an electronic device according to an embodiment of the present application.

Detailed ways

The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

In the existing related technologies, the user's activity distance can be measured by wearable devices, but the stride length in the scheme of measuring the activity distance by wearable devices is obtained by a fixed empirical coefficient × height, and the above empirical coefficient does not distinguish between age and/or activity type, etc.; in addition, the measured activity distance needs to be periodically corrected in combination with the GPS of the mobile phone.

However, the above solution does not take into account the differences in stride lengths of different people. In indoor running scenarios, GPS signals are basically unavailable, and one must rely on the distance data of a treadmill. In outdoor sports scenarios, turning on GPS has a greater impact on the power consumption of the mobile phone, and is limited by the low precision and/or multipath effect of civilian GPS, which can cause inaccurate or missing measurement data.

The embodiment of the present application provides a method for measuring the user's activity distance, which obtains the user's accurate activity distance through a new stride-level measurement solution, does not rely on an additional GPS module, and is a low-power, low-cost solution; and does not rely on empirical values, and can measure the activity distance of users of different groups and/or different activity scenes, thereby improving the accuracy of user activity distance measurement.

The method for measuring the user's activity distance provided in the embodiment of the present application senses the ground contact event of the moving foot through a pressure sensor or an inertial sensor in a measuring device configured on the moving foot, triggers the measurement of the activity distance, and then the measuring device configured on the moving foot obtains the local time and an identifier (Identifier; hereinafter referred to as: ID) of the measuring device, sends a modulated sound wave signal to the measuring device configured on the supporting foot, and the measuring device configured on the supporting foot demodulates the above-mentioned sound wave signal to obtain the transmission time of the sound wave signal between the two feet, and sends the transmission time to an electronic device connected to the above-mentioned measuring device, such as a smart phone or a smart watch; the electronic device offsets the clock difference of the measuring devices configured on the two feet through the transmission time of the sound wave signal in the two steps of the user, thereby realizing clock-free synchronization and improving the accuracy of the user's activity distance measurement.

FIG2 is a flow chart of an embodiment of a method for measuring user activity distance of the present application. As shown in FIG2 , the method for measuring user activity distance may include:

Step 201, after the user's left foot steps out and a first measuring device configured on the left foot detects that the contact state between the left foot and the ground changes, a first system time of a processor of the first measuring device and an identifier of the first measuring device are obtained.

Among them, the above-mentioned first measuring device can be various sports smart devices, including: wearable devices (such as anklets or foot buckles, etc.), insoles or shoes, etc. This embodiment does not limit the specific form of the above-mentioned first measuring device.

In this embodiment, the sensor used to detect changes in the contact state between the foot and the ground can be a pressure sensor or an inertial sensor; generally speaking, pressure sensors are usually used in insoles and shoes, and inertial sensors are usually used in wearable devices, which is not limited in this embodiment.

The change in the contact state between the left foot and the ground may be: the left foot is in contact with the ground, or the left foot is off the ground; when the contact state between the left foot and the ground changes to the left foot being in contact with the ground, it indicates that the left foot is a moving foot, and when the contact state between the left foot and the ground changes to the left foot being off the ground, it indicates that the left foot is a supporting foot; that is, in this embodiment, the foot that triggers the activity distance measurement may be a moving foot or a supporting foot. The main basis is that the propagation delay of sound waves is much smaller than the reaction delay of a person. The differences between several schemes for detecting changes in the contact state between the foot and the ground can be shown in Table 1.

Table 1

Move your feet Support feet Pressure Sensor The pressure increases from 0 The pressure starts to decrease Inertial Sensors The acceleration starts to decrease The acceleration starts from 0 and increases

It can be seen from Table 1 that if the sensor in the first measuring device is a pressure sensor and the left foot is a moving foot, then when the pressure sensor detects that the pressure starts to increase from 0, it can be determined that the left foot is in contact with the ground; when the left foot is a supporting foot, then when the pressure sensor detects that the pressure starts to decrease, it can be determined that the left foot leaves the ground; and if the sensor in the first measuring device is an inertial sensor and the left foot is a moving foot, then when the inertial sensor detects that the acceleration starts to decrease, it can be determined that the left foot is in contact with the ground; when the left foot is a supporting foot, then when the inertial sensor detects that the acceleration starts to increase from 0, it can be determined that the left foot leaves the ground.

After detecting that the contact state between the left foot and the ground changes, the first measuring device may obtain a first system time of a processor of the first measuring device and an identifier of the first measuring device.

Step 202: modulate the first system time and the identifier of the first measuring device by using sound waves.

The sound waves may be ultrasonic waves, audible sound waves, or hypersonic waves, etc. This embodiment does not limit the specific type of the sound waves.

When the above-mentioned sound waves use ordinary sound waves, that is, audible sound waves, the clock information and device identification can be encoded, and the sending and receiving of sound wave signals can be completed through a microphone and/or a speaker. In this way, no additional hardware changes are required. Most existing smart sports devices can implement the method provided in the embodiment of the present application by upgrading the software.

Step 203, sending the modulated first sound wave signal to the second measuring device configured on the right foot of the above-mentioned user, so that the second measuring device obtains the first transmission duration of the above-mentioned first sound wave signal according to the above-mentioned first sound wave signal, and sends the above-mentioned first transmission duration to the electronic device connected to the first measuring device and the second measuring device.

Among them, the above-mentioned second measuring device can also be various sports smart devices, including: wearable devices (for example: anklets or foot buckles, etc.), insoles or shoes, etc., and this embodiment does not limit the specific form of the above-mentioned second measuring device; the above-mentioned electronic device can be smart electronic devices such as smart phones, wearable devices or tablet computers, and this embodiment does not limit the specific form of the above-mentioned electronic device.

In a specific implementation, after the first measuring device sends the first sound wave signal to the second measuring device, the second measuring device can demodulate the first sound wave signal to obtain the first system moment and the identifier of the first measuring device, determine that the first sound wave signal comes from the first measuring device according to the identifier of the first measuring device, and obtain the current fourth system moment of the second measuring device. Then, the second measuring device can obtain the first transmission duration of the first sound wave signal according to the fourth system moment and the first system moment, and send the first transmission duration to the electronic device connected to the first measuring device and the second measuring device.

Step 204, receiving a second sound wave signal sent by a second measuring device, wherein the second sound wave signal is sent by the second measuring device after the contact state between the right foot of the user and the ground changes, and the second sound wave signal includes a second system time of a processor of the second measuring device and an identifier of the second measuring device.

Specifically, the change in the contact state between the right foot of the above-mentioned user and the ground is the same as the change in the contact state between the left foot and the ground, that is, if the contact state between the left foot and the ground changes to the left foot being in contact with the ground, then the change in the contact state between the right foot and the ground also changes to the right foot being in contact with the ground; and if the contact state between the left foot and the ground changes to the left foot leaving the ground, then the change in the contact state between the right foot and the ground also changes to the right foot leaving the ground.

Similarly, if the sensor in the second measuring device is a pressure sensor, and the right foot is the moving foot, then when the pressure sensor detects that the pressure starts to increase from 0, it can be determined that the right foot is in contact with the ground; when the right foot is the supporting foot, then when the pressure sensor detects that the pressure starts to decrease, it can be determined that the right foot leaves the ground; and if the sensor in the second measuring device is an inertial sensor, and the right foot is the moving foot, then when the inertial sensor detects that the acceleration starts to decrease, it can be determined that the right foot is in contact with the ground; when the right foot is the supporting foot, then when the inertial sensor detects that the acceleration starts to increase from 0, it can be determined that the right foot leaves the ground.

After detecting that the contact state between the right foot and the ground has changed, the second measuring device can obtain the second system moment of the processor of the second measuring device and the identifier of the second measuring device, and then the second measuring device uses sound waves to modulate the second system moment and the identifier of the second measuring device to obtain a second sound wave signal, and send the second sound wave signal to the first measuring device, and the first measuring device receives the second sound wave signal sent by the second measuring device.

Step 205, obtaining a second transmission duration of the second sound wave signal according to the second sound wave signal, and sending the second transmission duration to the electronic device, so that the electronic device determines the activity distance of two consecutive steps of the user according to the first transmission duration and the second transmission duration, and the propagation speed of the sound wave in the air.

In the above-mentioned method for measuring the user's activity distance, after the user's left foot steps out and the first measuring device configured on the above-mentioned left foot detects that the contact state of the left foot with the ground has changed, the first measuring device obtains the first system time of the processor of the above-mentioned first measuring device and the identifier of the above-mentioned first measuring device, and then modulates the above-mentioned first system time and the identifier of the above-mentioned first measuring device using sound waves, and sends the modulated first sound wave signal to the second measuring device configured on the above-mentioned user's right foot, so that the above-mentioned second measuring device obtains the first transmission duration of the above-mentioned first sound wave signal according to the above-mentioned first sound wave signal, and sends the above-mentioned first transmission duration to the electronic device connected to the first measuring device and the second measuring device; then, the first measuring device receives the second sound wave signal sent by the above-mentioned second measuring device, and according to The second sound wave signal obtains the second transmission duration of the second sound wave signal, and sends the second transmission duration to the electronic device, so that the electronic device determines the activity distance of the user's two consecutive steps according to the first transmission duration and the second transmission duration, as well as the propagation speed of the sound wave in the air. This allows the activity distance of users from different groups of people and/or different activity scenes to be measured without relying on empirical values, thereby improving the accuracy of user activity distance measurement. The method does not rely on additional GPS modules and radio frequency modules, and is a low-power and low-cost solution. The method utilizes the human kinematic characteristics of the left and right feet moving forward interactively, and by measuring the activity distance of the user's two consecutive steps, the clock error between the first measuring device and the second measuring device is offset, thereby achieving clock-free synchronization.

FIG3 is a flow chart of another embodiment of the method for measuring user activity distance of the present application. As shown in FIG3 , in the embodiment shown in FIG2 of the present application, step 205 may include:

Step 301: demodulate the second sound wave signal to obtain the second system time and the identifier of the second measuring device.

Step 302, determining whether the second sound wave signal comes from the second measuring device according to the identifier of the second measuring device. If yes, executing step 303; if the second sound wave signal does not come from the second measuring device, executing step 305.

Step 303: Obtain the current third system time of the first measuring device.

Step 304: Obtain a second transmission duration of the second sound wave signal according to the third system time and the second system time. Then, execute step 306.

Step 305: discard the second sound wave signal. This process ends.

Step 306: Send the second transmission duration to the electronic device, so that the electronic device determines the activity distance of two consecutive steps of the user according to the first transmission duration, the second transmission duration, and the propagation speed of the sound wave in the air.

FIG4 is a flow chart of another embodiment of a method for measuring user activity distance of the present application. As shown in FIG4 , the method for measuring user activity distance may include:

Step 401, receive the first transmission duration sent by the second measuring device, the first transmission duration is the transmission duration of the first sound wave signal, the first transmission duration is obtained by the second measuring device based on the first sound wave signal, and the first sound wave signal is sent by the first measuring device configured on the left foot to the second measuring device.

Among them, the above-mentioned first measuring device and the second measuring device can be various sports smart devices, including: wearable devices (for example: anklets or foot buckles, etc.), insoles or shoes, etc. This embodiment does not limit the specific forms of the above-mentioned first measuring device and the second measuring device.

Step 402, receive the second transmission duration sent by the above-mentioned first measuring device, the above-mentioned second transmission duration is the transmission duration of the second sound wave signal, the second transmission duration is obtained by the first measuring device based on the second sound wave signal, and the above-mentioned second sound wave signal is sent to the first measuring device by the second measuring device configured on the right foot.

Step 403: determining the activity distance of two consecutive steps of the user according to the first transmission duration, the second transmission duration, and the propagation speed of sound waves in the air.

Specifically, the activity distance of two consecutive steps of the user can be determined according to the first transmission duration and the second transmission duration, and the propagation speed of sound waves in the air:

The electronic device uses the delay of modulating and demodulating the sound wave by the first measuring device and the delay of modulating and demodulating the sound wave by the second measuring device to calibrate the sum of the first transmission duration and the second transmission duration to obtain the calibrated transmission duration; then the electronic device determines the activity distance of two consecutive steps of the above-mentioned user based on the calibrated transmission duration and the propagation speed of the sound wave in the air.

The electronic device is connected to the first measuring device and the second measuring device. The electronic device may be a smart phone, a wearable device, a tablet computer or other intelligent electronic device. This embodiment does not limit the specific form of the electronic device.

That is to say, in the process of sound wave modulation->sending->air transmission->receiving->sound wave demodulation, the processing delay of the hardware and/or software of the first measuring device or the second measuring device itself is included, so it is necessary to calibrate the sum of the first transmission duration and the second transmission duration. In this embodiment, the electronic device uses the delay of the first measuring device modulating and demodulating the sound wave, and the delay of the second measuring device modulating and demodulating the sound wave to calibrate the sum of the first transmission duration and the second transmission duration to obtain the calibrated transmission duration. In a specific implementation, the delay of the first measuring device modulating and demodulating the sound wave, and the delay of the second measuring device modulating and demodulating the sound wave, can be obtained in advance through calibration testing and stored in the above-mentioned electronic device.

In the above-mentioned method for measuring the user's activity distance, the electronic device receives a first transmission duration sent by a second measuring device, and receives a second transmission duration sent by the first measuring device, wherein the first transmission duration is the transmission duration of the first sound wave signal, and the second transmission duration is the transmission duration of the second sound wave signal; then the electronic device can determine the activity distance of the user's two consecutive steps based on the first transmission duration and the above-mentioned second transmission duration, as well as the propagation speed of the sound wave in the air, thereby being able to measure the activity distance of users of different groups and/or different activity scenes without relying on empirical values, thereby improving the accuracy of the user's activity distance measurement, and the above-mentioned method does not rely on additional GPS modules and radio frequency modules, and is a low-power and low-cost solution; and the above-mentioned method utilizes the human body's kinematic characteristics of the interactive movement of the left and right feet, and by measuring the activity distance of the user's two consecutive steps, offsets the clock error between the first measuring device and the second measuring device, thereby achieving clock-free synchronization.

The following takes the first measuring device and the second measuring device as smart shoes, the sensor in the smart shoes as pressure sensors, and the sound waves as ultrasonic waves as an example to illustrate the method for measuring the user activity distance provided in an embodiment of the present application. The system block diagram on which the above-mentioned measurement method is implemented can be shown in Figure 5, which is a schematic diagram of an embodiment of the system block diagram on which the method for measuring the user activity distance of the present application is implemented.

In conjunction with FIG5 , the method for measuring the user activity distance provided in the embodiment of the present application may include:

Part 1: Equipment identification management for left and right foot measurement equipment

Step 11, both the left and right feet are equipped with the same model of measuring devices, and both are turned on and successfully paired with the electronic device 431 via Bluetooth Low Energy (BLE); wherein, the measuring device configured for the left foot may be a first measuring device, hereinafter referred to as device A; the measuring device configured for the right foot may be a second measuring device, hereinafter referred to as device B.

Step 12: Device A and device B are centrally managed by electronic device 431, and unique device identifiers IDA and IDB are set respectively. Electronic device 431 notifies device B of device A's identifier IDA via BLE425, and notifies device A of device B's identifier IDB via BLE415. Device A and device B respectively save each other's device identifiers.

Part 2: After the left foot steps out and touches the ground, the stride length of the left foot -> right foot is measured, see FIG6 , which is a schematic diagram of an embodiment of the stride length measurement in the method for measuring the user activity distance of the present application.

In step 21 , the pressure sensor 411 in device A continuously collects pressure signals and sends them to the processor 412 ; the pressure sensor 421 in device B continuously collects pressure signals and sends them to the processor 422 .

Step 22 , the left foot steps out first and touches the ground. The pressure sensor 411 in device A identifies the left foot touching the ground event by comparing the pressure change curve, and sends a ranging pulse signal to the modulation/demodulation module 413 .

Step 23 , the modulation/demodulation module 413 obtains the system time T1 and the device identification IDA of the processor 412 , performs modulation using 40KHZ ultrasonic waves, and sends the result to the ultrasonic transducer 414 .

The frequency of the ultrasonic wave is not limited to 40KHZ, but may be other frequencies; the system time T1 needs to define the year, month, day, hour, minute, second, millisecond, and microsecond.

In step 24, the ultrasonic transducer 414 converts the electrical signal into a sound wave signal and transmits it to the ultrasonic transducer 424 of device B through air propagation.

Step 25 , the ultrasonic transducer 424 converts the sound wave signal into an electrical signal and sends it to the modulation/demodulation module 423 .

Step 26, the modulation/demodulation module 423 demodulates the system time T1 and the device identifier IDA from the electrical signal to determine whether the sound wave signal comes from the device A. If so, the electrical signal is sent to the processor 422, otherwise the sound wave signal is discarded.

Step 27 , the processor 422 obtains the system time T2 of the device B at this moment, obtains _TA = T2 - T1, and sends it to the electronic device 431 via the BLE 425 .

The acoustic wave velocity is related to the temperature T, and the acoustic wave velocity V = 331.4 + 0.607T. It is possible to integrate a temperature sensor module in device A and device B to obtain a more accurate acoustic wave velocity. After analysis, the embodiment of the present application found that the error caused by temperature is controllable, and the acoustic wave velocity can be calculated using the classic value of 340 m/s.

Part 3: After the right foot steps out and touches the ground, the stride length measurement from right foot to left foot is also referred to FIG. 6 . The measurement process is similar to the measurement process from left foot to right foot in Part 2, including:

Step 31 , the right foot steps out and touches the ground. The pressure sensor 421 identifies the right foot touching the ground event by comparing the pressure change curve and sends a ranging pulse signal to the modulation/demodulation module 423 .

Step 32 , the modulation/demodulation module 423 obtains the system time T3 and the device identifier IDB of the processor 422 , completes modulation using 40KHZ ultrasonic waves, and sends them to the ultrasonic transducer 424 .

The frequency of the ultrasonic wave is not limited to 40KHZ, but may be other frequencies; the system time T3 needs to define the year, month, day, hour, minute, second, millisecond, and microsecond.

In step 33, the ultrasonic transducer 424 converts the electrical signal into a sound wave signal and transmits it to the ultrasonic transducer 414 of device A through air propagation.

Step 34 , the ultrasonic transducer 414 converts the sound wave signal into an electrical signal and sends it to the modulation/demodulation module 413 .

Step 35, the modulation/demodulation module 413 demodulates the system time T3 and the device identifier IDB from the electrical signal to determine whether the sound wave signal comes from device B. If yes, the electrical signal is sent to the processor 412, otherwise the sound wave signal is discarded.

Step 36 , the processor 412 obtains the system time T4 of the device A at this moment, obtains _TB = T4−T3, and sends it to the electronic device 431 via the BLE 415 .

Part 4: Clock error reduction to get accurate stride distance

Step 41 , the electronic device 431 calculates T _AB = _TA + _TB .

Clock error reduction principle:

Assume that there is a clock error ΔT between device A and device B, and the system time of device A is slower than that of device B. The actual transmission time of ultrasound from left foot to right foot is T _AT , and the actual transmission time of ultrasound from right foot to left foot is T _BT , then:

It can be seen from the above formula that T _AB is exactly equal to the sum of the actual transmission time of the ultrasonic wave between two consecutive steps of the user.

Step 42, in the process of ultrasonic modulation->sending->air transmission->receiving->ultrasonic demodulation, the hardware and software processing delays of device A and device B themselves need to be calibrated, see Figure 7, which is a schematic diagram of an embodiment of delay calibration in the user activity distance measurement method of the present application.

In FIG7 , Tx is the time required from the device processor sending the ranging instruction to the ultrasonic transducer of the device emitting the sound wave;

Ty is the time required for the ultrasonic transducer of the device to receive the sound wave and complete the demodulation;

T: The transmission time of ultrasonic waves between device A and device B.

For devices A and B of the same model, Tx and Ty are relatively fixed and can be preset in the memory of the electronic device 431 through calibration testing.

After calibration, the user's active distance for two consecutive steps is S = (T _AB – 2Tx – 2Ty) × 340.

The method for measuring user activity distance provided in the embodiment of the present application is a general solution that can be applied to various sports smart devices. It does not require GPS and additional radio frequency modules, does not rely on third-party clocks, and has simple hardware implementation.

Typical application scenarios may include:

1. Activity assessment: Activity distance is an important indicator to measure the health status of the elderly. The gait of the elderly is impaired, and the stride length varies greatly among groups, so higher accuracy is required;

2. Anti-injury running posture guidance: The most common injury problem in running scenes is excessive stride. This method can provide scientific stride guidance to users by combining two consecutive strides.

3. Physical fitness assessment: In running or walking scenarios, without GPS positioning, accurate distance and pace can be directly obtained through wearable devices, realizing accurate activity calories and maximum oxygen uptake assessment;

4. Activity track description: In outdoor mountaineering scenes, when there is no GPS or the GPS signal is weak, you can use the stride length to assist in describing the mountaineering track route, so as to facilitate returning to the original route.

It is to be understood that some or all of the steps or operations in the above embodiments are merely examples, and the present application embodiments may also perform other operations or variations of various operations. In addition, the various steps may be performed in different orders presented in the above embodiments, and it is possible that not all of the operations in the above embodiments need to be performed.

Figure 8 is a structural schematic diagram of an embodiment of a user activity distance measuring device of the present application. This embodiment is illustrated by taking the user activity distance measuring device as the first measuring device as an example. The above-mentioned measuring device can be various sports-related smart devices, including: wearable devices (for example: anklets or foot buckles, etc.), insoles or shoes, etc. This embodiment does not limit the specific form of the above-mentioned measuring device.

The measuring device may include: a sensor 810; an acoustic wave modem 820; an acoustic wave transceiver 830; a communication module 840; one or more processors 850; a memory 860; a plurality of applications; and one or more computer programs, wherein the one or more computer programs are stored in the memory 860, and the one or more computer programs include instructions, and when the instructions are executed by the measuring device, the measuring device performs the following steps:

After the user's left foot steps out and the first measuring device configured on the left foot detects that the contact state between the left foot and the ground changes, obtaining a first system time of a processor of the first measuring device and an identifier of the first measuring device;

Modulating the first system time and the identifier of the first measuring device by using sound waves;

Sending the modulated first sound wave signal to a second measuring device configured on the right foot of the user, so that the second measuring device obtains a first transmission duration of the first sound wave signal according to the first sound wave signal, and sends the first transmission duration to an electronic device connected to the first measuring device and the second measuring device;

receiving a second sound wave signal sent by the second measuring device, wherein the second sound wave signal is sent by the second measuring device after the contact state between the right foot of the user and the ground changes, and the second sound wave signal includes a second system time of a processor of the second measuring device and an identifier of the second measuring device;

A second transmission duration of the second sound wave signal is obtained according to the second sound wave signal, and the second transmission duration is sent to the electronic device, so that the electronic device determines the activity distance of two consecutive steps of the user according to the first transmission duration and the second transmission duration, and the propagation speed of the sound wave in the air.

In one possible implementation, when the instruction is executed by the measuring device, the step of causing the measuring device to obtain a second transmission duration of the second sound wave signal according to the second sound wave signal includes:

Demodulating the second sound wave signal to obtain the second system time and the identifier of the second measuring device;

Determining whether the second sound wave signal comes from the second measuring device according to the identifier of the second measuring device;

If yes, obtaining the current third system time of the first measuring device;

According to the third system time and the second system time, a second transmission duration of the second sound wave signal is obtained.

In one possible implementation, when the instruction is executed by the measuring device, the measuring device further performs the following steps after performing the step of determining whether the second sound wave signal comes from the second measuring device according to the identifier of the second measuring device:

If the second sound wave signal does not come from the second measuring device, the second sound wave signal is discarded.

The user activity distance measurement device shown in FIG. 8 can be used to execute the functions/steps in the method provided in the embodiments shown in FIG. 2 to FIG. 3 of the present application.

As shown in Fig. 8, the user activity distance measuring device 800 includes a sensor 810, an acoustic wave modem 820, an acoustic wave transceiver 830, a communication module 840, a processor 850 and a memory 860. Among them, the sensor 810, the acoustic wave modem 820, the acoustic wave transceiver 830, the communication module 840, the processor 850 and the memory 860 can communicate with each other through an internal connection path to transmit control and/or data signals, the memory 860 is used to store a computer program, and the processor 850 is used to call and run the computer program from the memory 860.

The processor 850 and the memory 860 may be combined into a processing device, or more commonly, they are independent components, and the processor 850 is used to execute the program code stored in the memory 860 to implement the above functions. In specific implementation, the memory 860 may also be integrated into the processor 850, or may be independent of the processor 850. It should be understood that the processor 850 may correspond to the processor 412 in FIG. 5 .

Sensor 810 is used to detect changes in the contact state between the foot and the ground. It can be a pressure sensor or an inertial sensor. This embodiment does not limit this. It can be understood that when sensor 810 is a pressure sensor, it can correspond to pressure sensor 411 in Figure 5.

The sound wave modem 820 is used to modulate and demodulate the sound waves. It can be understood that the sound wave modem 820 corresponds to the modulation/demodulation module 413 in Figure 5.

The sound wave transceiver 830 is used to send or receive sound wave signals. It can be understood that the sound wave transceiver 830 corresponds to the ultrasonic transducer 414 in FIG. 5 .

The communication module 840 is used to communicate with the electronic device. The communication module 840 can be a Bluetooth module, a BLE module or a wireless communication module. The present embodiment does not limit the specific form of the communication module 840. It can be understood that when the communication module 840 is a BLE module, it can correspond to BLE415 in FIG. 5 .

It should be understood that the user activity distance measurement device 800 shown in FIG8 can implement each process of the method provided in the embodiments shown in FIG2 to FIG3. The operations and/or functions of each module in the user activity distance measurement device 800 are respectively to implement the corresponding processes in the above method embodiments. For details, please refer to the description in the method embodiments shown in FIG2 to FIG3. To avoid repetition, the detailed description is appropriately omitted here.

It should be understood that the processor 850 in the user activity distance measuring device 800 shown in Figure 8 can be a system on a chip SOC, and the processor 850 can include a central processing unit (Central Processing Unit; hereinafter referred to as: CPU), and can further include other types of processors, such as: a graphics processor (Graphics Processing Unit; hereinafter referred to as: GPU), etc.

In summary, the various processors or processing units within the processor 850 can work together to implement the previous method flow, and the corresponding software programs of the various processors or processing units can be stored in the memory 860.

FIG9 is a schematic diagram of the structure of an embodiment of an electronic device of the present application. The electronic device may be a smart electronic device such as a smart phone, a wearable device or a tablet computer. The present embodiment does not limit the specific form of the electronic device.

The electronic device may include:

One or more processors; a memory; a plurality of applications; and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, and when the instructions are executed by the electronic device, the electronic device performs the following steps:

Receive a first transmission duration sent by a second measuring device, where the first transmission duration is a transmission duration of a first sound wave signal, the first transmission duration is obtained by the second measuring device according to the first sound wave signal, and the first sound wave signal is sent by the first measuring device configured on the left foot to the second measuring device;

Receive a second transmission duration sent by the first measuring device, where the second transmission duration is the transmission duration of the second sound wave signal, the second transmission duration is obtained by the first measuring device according to the second sound wave signal, and the second sound wave signal is sent by the second measuring device configured on the right foot to the first measuring device;

The activity distance of two consecutive steps of the user is determined according to the first transmission duration, the second transmission duration, and the propagation speed of the sound wave in the air.

In one possible implementation manner, when the instruction is executed by the electronic device, the electronic device executes the step of determining the activity distance of two consecutive steps of the user according to the first transmission duration and the second transmission duration, and the propagation speed of sound waves in the air, including:

Using the time delay of the first measuring device modulating and demodulating the sound wave and the time delay of the second measuring device modulating and demodulating the sound wave, calibrate the sum of the first transmission duration and the second transmission duration to obtain a calibrated transmission duration;

The activity distance of two consecutive steps of the user is determined according to the calibrated transmission time and the propagation speed of the sound wave in the air.

The electronic device shown in FIG. 9 can be used to execute the functions/steps in the method provided in the embodiment shown in FIG. 4 of the present application.

The electronic device shown in FIG. 9 may be an electronic device or a circuit device built into the above electronic device.

FIG. 9 shows a schematic structural diagram of the electronic device 100 .

The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display screen 194, and a subscriber identification module (SIM) card interface 195, etc. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, etc.

It is to be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

The processor 110 may include one or more processing units, for example, the processor 110 may include an application processor (Application Processor; hereinafter referred to as: AP), a modem processor, a graphics processor (Graphics Processing Unit; hereinafter referred to as: GPU), an image signal processor (Image Signal Processor; hereinafter referred to as: ISP), a controller, a video codec, a digital signal processor (Digital Signal Processor; hereinafter referred to as: DSP), a baseband processor, and/or a neural network processor (Neural-network Processing Unit; hereinafter referred to as: NPU), etc. Among them, different processing units may be independent devices or integrated in one or more processors.

The controller can generate operation control signals according to the instruction operation code and timing signal to complete the control of instruction fetching and execution.

The processor 110 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may store instructions or data that the processor 110 has just used or cyclically used. If the processor 110 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

In some embodiments, the processor 110 may include one or more interfaces. The interface may include an Inter-integrated Circuit (hereinafter referred to as: I2C) interface, an Inter-integrated Circuit Sound (hereinafter referred to as: I2S) interface, a Pulse Code Modulation (hereinafter referred to as: PCM) interface, a Universal Asynchronous Receiver/Transmitter (hereinafter referred to as: UART) interface, a Mobile Industry Processor Interface (hereinafter referred to as: MIPI), a General-Purpose Input/Output (hereinafter referred to as: GPIO) interface, a Subscriber Identity Module (hereinafter referred to as: SIM) interface, and/or a Universal Serial Bus (hereinafter referred to as: USB) interface, etc.

The I2C interface is a bidirectional synchronous serial bus, including a serial data line (Serial Data Line; hereinafter referred to as: SDA) and a serial clock line (Derail Clock Line; hereinafter referred to as: SCL). In some embodiments, the processor 110 may include multiple groups of I2C buses. The processor 110 can be coupled to the touch sensor 180K, the charger, the flash, the camera 193, etc. through different I2C bus interfaces. For example: the processor 110 can be coupled to the touch sensor 180K through the I2C interface, so that the processor 110 communicates with the touch sensor 180K through the I2C bus interface to realize the touch function of the electronic device 100.

The I2S interface can be used for audio communication. In some embodiments, the processor 110 can include multiple I2S buses. The processor 110 can be coupled to the audio module 170 via the I2S bus to achieve communication between the processor 110 and the audio module 170. In some embodiments, the audio module 170 can transmit an audio signal to the wireless communication module 160 via the I2S interface to achieve the function of answering a call through a Bluetooth headset.

The PCM interface can also be used for audio communication, sampling, quantizing and encoding analog signals. In some embodiments, the audio module 170 and the wireless communication module 160 can be coupled via a PCM bus interface. In some embodiments, the audio module 170 can also transmit audio signals to the wireless communication module 160 via the PCM interface to realize the function of answering calls via a Bluetooth headset. Both the I2S interface and the PCM interface can be used for audio communication.

The UART interface is a universal serial data bus for asynchronous communication. The bus can be a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication. In some embodiments, the UART interface is generally used to connect the processor 110 and the wireless communication module 160. For example, the processor 110 communicates with the Bluetooth module in the wireless communication module 160 through the UART interface to implement the Bluetooth function. In some embodiments, the audio module 170 can transmit an audio signal to the wireless communication module 160 through the UART interface to implement the function of playing music through a Bluetooth headset.

The MIPI interface can be used to connect the processor 110 with peripheral devices such as the display screen 194 and the camera 193. The MIPI interface includes a camera serial interface (CSI), a display serial interface (DSI), etc. In some embodiments, the processor 110 and the camera 193 communicate via the CSI interface to implement the shooting function of the electronic device 100. The processor 110 and the display screen 194 communicate via the DSI interface to implement the display function of the electronic device 100.

The GPIO interface can be configured by software. The GPIO interface can be configured as a control signal or as a data signal. In some embodiments, the GPIO interface can be used to connect the processor 110 with the camera 193, the display 194, the wireless communication module 160, the audio module 170, the sensor module 180, etc. The GPIO interface can also be configured as an I2C interface, an I2S interface, a UART interface, a MIPI interface, etc.

The USB interface 130 is an interface that complies with the USB standard specification, and specifically can be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. The USB interface 130 can be used to connect a charger to charge the electronic device 100, and can also be used to transfer data between the electronic device 100 and a peripheral device. It can also be used to connect headphones to play audio through the headphones. The interface can also be used to connect other electronic devices, such as AR devices, etc.

It is understandable that the interface connection relationship between the modules illustrated in the embodiment of the present application is only a schematic illustration and does not constitute a structural limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

The charging management module 140 is used to receive charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 may receive charging input from a wired charger through the USB interface 130. In some wireless charging embodiments, the charging management module 140 may receive wireless charging input through a wireless charging coil of the electronic device 100. While the charging management module 140 is charging the battery 142, it may also power the electronic device through the power management module 141.

The power management module 141 is used to connect the battery 142, the charging management module 140 and the processor 110. The power management module 141 receives input from the battery 142 and/or the charging management module 140, and supplies power to the processor 110, the internal memory 121, the display screen 194, the camera 193, and the wireless communication module 160. The power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle number, battery health status (leakage, impedance), etc. In some other embodiments, the power management module 141 can also be set in the processor 110. In other embodiments, the power management module 141 and the charging management module 140 can also be set in the same device.

The wireless communication function of the electronic device 100 can be implemented through the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modem processor and the baseband processor.

Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in electronic device 100 can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve the utilization of antennas. For example, antenna 1 can be reused as a diversity antenna for a wireless local area network. In some other embodiments, the antenna can be used in combination with a tuning switch.

The mobile communication module 150 can provide solutions for wireless communications including 2G/3G/4G/5G, etc., applied to the electronic device 100. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a low noise amplifier (Low Noise Amplifier; hereinafter referred to as: LNA), etc. The mobile communication module 150 can receive electromagnetic waves from the antenna 1, and filter, amplify, and process the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The mobile communication module 150 can also amplify the signal modulated by the modulation and demodulation processor, and convert it into electromagnetic waves for radiation through the antenna 1. In some embodiments, at least some of the functional modules of the mobile communication module 150 can be set in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 can be set in the same device as at least some of the modules of the processor 110.

The modem processor may include a modulator and a demodulator. Among them, the modulator is used to modulate the low-frequency baseband signal to be sent into a medium-high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing. After the low-frequency baseband signal is processed by the baseband processor, it is passed to the application processor. The application processor outputs a sound signal through an audio device (not limited to a speaker 170A, a receiver 170B, etc.), or displays an image or video through a display screen 194. In some embodiments, the modem processor may be an independent device. In other embodiments, the modem processor may be independent of the processor 110 and be set in the same device as the mobile communication module 150 or other functional modules.

The wireless communication module 160 can provide wireless communication solutions including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi network), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR), etc.) applied to the electronic device 100. The wireless communication module 160 can be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, modulates the electromagnetic wave signal and filters it, and sends the processed signal to the processor 110. The wireless communication module 160 can also receive the signal to be sent from the processor 110, modulate the frequency, amplify it, and convert it into electromagnetic waves for radiation through the antenna 2.

In some embodiments, the antenna 1 of the electronic device 100 is coupled to the mobile communication module 150, and the antenna 2 is coupled to the wireless communication module 160, so that the electronic device 100 can communicate with the network and other devices through wireless communication technology. The wireless communication technology may include Global System for Mobile Communications (hereinafter referred to as GSM), General Packet Radio Service (hereinafter referred to as GPRS), Code Division Multiple Access (hereinafter referred to as CDMA), Wideband Code Division Multiple Access (hereinafter referred to as WCDMA), Time-Division Code Division Multiple Access (hereinafter referred to as TD-SCDMA), Long Term Evolution (hereinafter referred to as LTE), BT, GNSS, WLAN, NFC, FM, and/or IR technology. The GNSS may include a Global Positioning System (GPS), a Global Navigation Satellite System (GLONASS), a Beidou Navigation Satellite System (BDS), a Quasi-Zenith Satellite System (QZSS) and/or a Satellite Based Augmentation System (SBAS).

The electronic device 100 implements the display function through a GPU, a display screen 194, and an application processor. The GPU is a microprocessor for image processing, which connects the display screen 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 110 may include one or more GPUs that execute program instructions to generate or change display information.

The display screen 194 is used to display images, videos, etc. The display screen 194 includes a display panel. The display panel can be a liquid crystal display (Liquid Crystal Display; hereinafter referred to as: LCD), an organic light-emitting diode (Organic Light-Emitting Diode; hereinafter referred to as: OLED), an active matrix organic light-emitting diode or an active matrix organic light-emitting diode (Active-Matrix Organic Light Emitting Diode; hereinafter referred to as: AMOLED), a flexible light-emitting diode (Flex Light-Emitting Diode; hereinafter referred to as: FLED), Miniled, MicroLed, Micro-oLed, Quantum Dot Light Emitting Diodes (Quantum Dot Light Emitting Diodes; hereinafter referred to as: QLED), etc. In some embodiments, the electronic device 100 may include 1 or N display screens 194, where N is a positive integer greater than 1.

The electronic device 100 can realize the shooting function through ISP, camera 193, video codec, GPU, display screen 194 and application processor.

The ISP is used to process the data fed back by the camera 193. For example, when taking a photo, the shutter is opened, and the light is transmitted to the camera photosensitive element through the lens. The light signal is converted into an electrical signal, and the camera photosensitive element transmits the electrical signal to the ISP for processing and converts it into an image visible to the naked eye. The ISP can also perform algorithm optimization on the noise, brightness, and skin color of the image. The ISP can also optimize the exposure, color temperature and other parameters of the shooting scene. In some embodiments, the ISP can be set in the camera 193.

The camera 193 is used to capture still images or videos. The object generates an optical image through the lens and projects it onto the photosensitive element. The photosensitive element can be a charge coupled device (Charge Coupled Device; hereinafter referred to as: CCD) or a complementary metal oxide semiconductor (Complementary Metal-Oxide-Semiconductor; hereinafter referred to as: CMOS) phototransistor. The photosensitive element converts the optical signal into an electrical signal, and then passes the electrical signal to the ISP for conversion into a digital image signal. The ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into an image signal in a standard RGB, YUV or other format. In some embodiments, the electronic device 100 may include 1 or N cameras 193, where N is a positive integer greater than 1.

The digital signal processor is used to process digital signals, and can process not only digital image signals but also other digital signals. For example, when the electronic device 100 is selecting a frequency point, the digital signal processor is used to perform Fourier transform on the frequency point energy.

The video codec is used to compress or decompress digital video. The electronic device 100 may support one or more video codecs. Thus, the electronic device 100 may play or record videos in various coding formats, such as Moving Picture Experts Group (MPEG) 1, MPEG2, MPEG3, MPEG4, etc.

NPU is a neural network (NN) computing processor that quickly processes input information by drawing on the structure of biological neural networks, such as the transmission mode between neurons in the human brain, and can also continuously self-learn. NPU can realize applications such as intelligent cognition of electronic device 100, such as image recognition, face recognition, voice recognition, text understanding, etc.

The external memory interface 120 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device 100. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function, such as storing music, video and other files in the external memory card.

The internal memory 121 can be used to store computer executable program codes, which include instructions. The internal memory 121 may include a program storage area and a data storage area. Among them, the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.). The data storage area may store data created during the use of the electronic device 100 (such as audio data, a phone book, etc.). In addition, the internal memory 121 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (Universal Flash Storage; hereinafter referred to as: UFS), etc. The processor 110 executes various functional applications and data processing of the electronic device 100 by running instructions stored in the internal memory 121, and/or instructions stored in a memory provided in the processor.

The electronic device 100 can implement audio functions such as music playing and recording through the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, the headphone jack 170D, and the application processor.

The audio module 170 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signals. The audio module 170 can also be used to encode and decode audio signals. In some embodiments, the audio module 170 can be arranged in the processor 110, or some functional modules of the audio module 170 can be arranged in the processor 110.

The speaker 170A, also called a "speaker", is used to convert an audio electrical signal into a sound signal. The electronic device 100 can listen to music or listen to a hands-free call through the speaker 170A.

The receiver 170B, also called a "earpiece", is used to convert audio electrical signals into sound signals. When the electronic device 100 receives a call or voice message, the voice can be received by placing the receiver 170B close to the human ear.

Microphone 170C, also called "microphone" or "microphone", is used to convert sound signals into electrical signals. When making a call or sending a voice message, the user can speak by putting their mouth close to microphone 170C to input the sound signal into microphone 170C. The electronic device 100 can be provided with at least one microphone 170C. In other embodiments, the electronic device 100 can be provided with two microphones 170C, which can not only collect sound signals but also realize noise reduction function. In other embodiments, the electronic device 100 can also be provided with three, four or more microphones 170C to collect sound signals, reduce noise, identify the sound source, realize directional recording function, etc.

The earphone interface 170D is used to connect a wired earphone and can be a USB interface 130, or a 3.5 mm Open Mobile Terminal Platform (OMTP) standard interface or a Cellular Telecommunications Industry Association of the USA (CTIA) standard interface.

The pressure sensor 180A is used to sense the pressure signal and can convert the pressure signal into an electrical signal. In some embodiments, the pressure sensor 180A can be set on the display screen 194. There are many types of pressure sensors 180A, such as resistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, etc. The capacitive pressure sensor can be a parallel plate including at least two conductive materials. When a force acts on the pressure sensor 180A, the capacitance between the electrodes changes. The electronic device 100 determines the intensity of the pressure according to the change in capacitance. When a touch operation acts on the display screen 194, the electronic device 100 detects the touch operation intensity according to the pressure sensor 180A. The electronic device 100 can also calculate the touch position according to the detection signal of the pressure sensor 180A. In some embodiments, touch operations acting on the same touch position but with different touch operation intensities can correspond to different operation instructions. For example: when a touch operation with a touch operation intensity less than the first pressure threshold acts on the short message application icon, an instruction to view the short message is executed. When a touch operation with a touch operation intensity greater than or equal to the first pressure threshold acts on the short message application icon, an instruction to create a new short message is executed.

The gyro sensor 180B can be used to determine the motion posture of the electronic device 100. In some embodiments, the angular velocity of the electronic device 100 around three axes (i.e., x, y, and z axes) can be determined by the gyro sensor 180B. The gyro sensor 180B can be used for anti-shake shooting. For example, when the shutter is pressed, the gyro sensor 180B detects the angle of the electronic device 100 shaking, calculates the distance that the lens module needs to compensate based on the angle, and allows the lens to offset the shaking of the electronic device 100 through reverse movement to achieve anti-shake. The gyro sensor 180B can also be used for navigation and somatosensory game scenes.

The air pressure sensor 180C is used to measure air pressure. In some embodiments, the electronic device 100 calculates the altitude through the air pressure value measured by the air pressure sensor 180C to assist in positioning and navigation.

The magnetic sensor 180D includes a Hall sensor. The electronic device 100 can use the magnetic sensor 180D to detect the opening and closing of the flip leather case. In some embodiments, when the electronic device 100 is a flip phone, the electronic device 100 can detect the opening and closing of the flip cover according to the magnetic sensor 180D. Then, according to the detected opening and closing state of the leather case or the opening and closing state of the flip cover, the flip cover can be automatically unlocked.

The acceleration sensor 180E can detect the magnitude of the acceleration of the electronic device 100 in all directions (generally three axes). When the electronic device 100 is stationary, the magnitude and direction of gravity can be detected. It can also be used to identify the posture of the electronic device and is applied to applications such as horizontal and vertical screen switching and pedometers.

The distance sensor 180F is used to measure the distance. The electronic device 100 can measure the distance by infrared or laser. In some embodiments, when shooting a scene, the electronic device 100 can use the distance sensor 180F to measure the distance to achieve fast focusing.

The proximity light sensor 180G may include, for example, a light emitting diode (LED) and a light detector, such as a photodiode. The light emitting diode may be an infrared light emitting diode. The electronic device 100 emits infrared light outward through the light emitting diode. The electronic device 100 uses a photodiode to detect infrared reflected light from nearby objects. When sufficient reflected light is detected, it can be determined that there is an object near the electronic device 100. When insufficient reflected light is detected, the electronic device 100 can determine that there is no object near the electronic device 100. The electronic device 100 can use the proximity light sensor 180G to detect that the user holds the electronic device 100 close to the ear to talk, so as to automatically turn off the screen to save power. The proximity light sensor 180G can also be used in leather case mode and pocket mode to automatically unlock and lock the screen.

The ambient light sensor 180L is used to sense the brightness of the ambient light. The electronic device 100 can adaptively adjust the brightness of the display screen 194 according to the perceived ambient light brightness. The ambient light sensor 180L can also be used to automatically adjust the white balance when taking pictures. The ambient light sensor 180L can also cooperate with the proximity light sensor 180G to detect whether the electronic device 100 is in a pocket to prevent accidental touches.

The fingerprint sensor 180H is used to collect fingerprints. The electronic device 100 can use the collected fingerprint characteristics to implement fingerprint unlocking, access application locks, fingerprint photography, fingerprint call answering, etc.

The temperature sensor 180J is used to detect temperature. In some embodiments, the electronic device 100 uses the temperature detected by the temperature sensor 180J to execute a temperature processing strategy. For example, when the temperature reported by the temperature sensor 180J exceeds a threshold, the electronic device 100 reduces the performance of a processor located near the temperature sensor 180J to reduce power consumption and implement thermal protection. In other embodiments, when the temperature is lower than another threshold, the electronic device 100 heats the battery 142 to avoid abnormal shutdown of the electronic device 100 due to low temperature. In other embodiments, when the temperature is lower than another threshold, the electronic device 100 boosts the output voltage of the battery 142 to avoid abnormal shutdown caused by low temperature.

The touch sensor 180K is also called a "touch control device". The touch sensor 180K can be set on the display screen 194, and the touch sensor 180K and the display screen 194 form a touch screen, also called a "touch control screen". The touch sensor 180K is used to detect touch operations acting on or near it. The touch sensor can pass the detected touch operation to the application processor to determine the type of touch event. Visual output related to the touch operation can be provided through the display screen 194. In other embodiments, the touch sensor 180K can also be set on the surface of the electronic device 100, which is different from the position of the display screen 194.

The bone conduction sensor 180M can obtain a vibration signal. In some embodiments, the bone conduction sensor 180M can obtain a vibration signal of a vibrating bone block of the vocal part of the human body. The bone conduction sensor 180M can also contact the human pulse to receive a blood pressure beat signal. In some embodiments, the bone conduction sensor 180M can also be set in an earphone and combined into a bone conduction earphone. The audio module 170 can parse out a voice signal based on the vibration signal of the vibrating bone block of the vocal part obtained by the bone conduction sensor 180M to realize a voice function. The application processor can parse the heart rate information based on the blood pressure beat signal obtained by the bone conduction sensor 180M to realize a heart rate detection function.

The key 190 includes a power key, a volume key, etc. The key 190 may be a mechanical key or a touch key. The electronic device 100 may receive key input and generate key signal input related to user settings and function control of the electronic device 100.

Motor 191 can generate vibration prompts. Motor 191 can be used for incoming call vibration prompts, and can also be used for touch vibration feedback. For example, touch operations acting on different applications (such as taking pictures, audio playback, etc.) can correspond to different vibration feedback effects. For touch operations acting on different areas of the display screen 194, motor 191 can also correspond to different vibration feedback effects. Different application scenarios (for example: time reminders, receiving messages, alarm clocks, games, etc.) can also correspond to different vibration feedback effects. The touch vibration feedback effect can also support customization.

The indicator 192 may be an indicator light, which may be used to indicate the charging status, power changes, messages, missed calls, notifications, etc.

The SIM card interface 195 is used to connect a SIM card. The SIM card can be connected to and separated from the electronic device 100 by inserting it into the SIM card interface 195 or pulling it out from the SIM card interface 195. The electronic device 100 can support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 195 can support Nano SIM cards, Micro SIM cards, SIM cards, and the like. Multiple cards can be inserted into the same SIM card interface 195 at the same time. The types of the multiple cards can be the same or different. The SIM card interface 195 can also be compatible with different types of SIM cards. The SIM card interface 195 can also be compatible with external memory cards. The electronic device 100 interacts with the network through the SIM card to implement functions such as calls and data communications. In some embodiments, the electronic device 100 uses an eSIM, i.e., an embedded SIM card. The eSIM card can be embedded in the electronic device 100 and cannot be separated from the electronic device 100.

The embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored. When the computer-readable storage medium is run on a computer, the computer executes the method provided in the embodiment shown in Figures 2 to 3 of the present application.

An embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored. When the computer-readable storage medium is run on a computer, the computer executes the method provided in the embodiment shown in FIG. 4 of the present application.

The embodiment of the present application also provides a computer program product, which includes a computer program. When the computer program is run on a computer, it enables the computer to execute the method provided by the embodiment shown in Figures 2 to 3 of the present application.

An embodiment of the present application also provides a computer program product, which includes a computer program. When the computer program is run on a computer, it enables the computer to execute the method provided by the embodiment shown in FIG. 4 of the present application.

In the embodiments of the present application, "at least one" refers to one or more, and "more than one" refers to two or more. "And/or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character "/" generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.

Those of ordinary skill in the art will appreciate that the various units and algorithm steps described in the embodiments disclosed herein can be implemented in a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

In several embodiments provided in the present application, if any function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory; hereinafter referred to as: ROM), random access memory (Random Access Memory; hereinafter referred to as: RAM), disk or optical disk, and other media that can store program codes.

The above is only a specific implementation of the present application. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. The protection scope of the present application should be based on the protection scope of the claims.

Claims (12)

1. A method for measuring a distance of a user's activity, comprising:

after a user takes a step of a left foot and a first measuring device configured on the left foot detects that the contact state of the left foot and the ground is changed, acquiring a first system time of a processor of the first measuring device and an identification of the first measuring device;

modulating the first system time and the identification of the first measuring device by using sound waves;

Transmitting the modulated first sound wave signal to a second measuring device configured on the right foot of the user, so that the second measuring device obtains a first transmission time length of the first sound wave signal according to the first sound wave signal, and transmits the first transmission time length to an electronic device connected with the first measuring device and the second measuring device;

receiving a second acoustic signal sent by the second measuring device, wherein the second acoustic signal is sent by the second measuring device after the contact state of the right foot of the user with the ground is changed, and the second acoustic signal comprises a second system time of a processor of the second measuring device and an identifier of the second measuring device;

and obtaining a second transmission time length of the second sound signal according to the second sound signal, and sending the second transmission time length to the electronic equipment so that the electronic equipment can determine the moving distance of the user in two continuous steps according to the first transmission time length, the second transmission time length and the propagation speed of the sound wave in the air.

2. The method of claim 1, wherein the obtaining the second transmission duration of the second acoustic signal from the second acoustic signal comprises:

demodulating the second acoustic signal to obtain the second system time and the identification of the second measuring device;

determining whether the second acoustic signal is from the second measurement device according to the identification of the second measurement device;

if yes, acquiring the current third system time of the first measuring equipment;

and obtaining a second transmission duration of the second acoustic signal according to the third system time and the second system time.

3. The method of claim 2, wherein after determining whether the second acoustic signal is from the second measurement device based on the identification of the second measurement device, further comprising:

The second acoustic signal is discarded if the second acoustic signal is not from the second measurement device.

4. A method for measuring a distance of a user's activity, comprising:

Receiving a first transmission time length sent by a second measuring device, wherein the first transmission time length is a transmission time length of a first sound wave signal, the first transmission time length is obtained by the second measuring device according to the first sound wave signal, and the first sound wave signal is sent to the second measuring device by a first measuring device configured on a left foot;

Receiving a second transmission time length sent by the first measurement device, wherein the second transmission time length is a transmission time length of a second acoustic signal, the second transmission time length is obtained by the first measurement device according to the second acoustic signal, and the second acoustic signal is sent to the first measurement device by the second measurement device configured on a right foot;

and determining the moving distance of the user in two continuous steps according to the first transmission time length, the second transmission time length and the propagation speed of the sound wave in the air.

5. The method of claim 4, wherein said determining the active distance of the user from the first transmission duration and the second transmission duration, and the propagation speed of the sound wave in the air comprises:

calibrating the sum of the first transmission time length and the second transmission time length by using the time delay of modulating and demodulating the sound wave by the first measuring equipment and the time delay of modulating and demodulating the sound wave by the second measuring equipment to obtain the calibrated transmission time length;

And determining the continuous two-step active distance of the user according to the calibrated transmission time length and the propagation speed of the sound wave in the air.

6. A measurement device for a distance of a user's activity, wherein the measurement device is a first measurement device, the measurement device comprising: a sensor; an acoustic wave modem; an acoustic transceiver; a communication module; one or more processors; a memory; a plurality of applications; and one or more computer programs, wherein the one or more computer programs are stored in the memory, the one or more computer programs comprising instructions, which when executed by the measurement device, cause the measurement device to perform the steps of:

after a user takes a step of a left foot and a first measuring device configured on the left foot detects that the contact state of the left foot and the ground is changed, acquiring a first system time of a processor of the first measuring device and an identification of the first measuring device;

modulating the first system time and the identification of the first measuring device by using sound waves;

Transmitting the modulated first sound wave signal to a second measuring device configured on the right foot of the user, so that the second measuring device obtains a first transmission time length of the first sound wave signal according to the first sound wave signal, and transmits the first transmission time length to an electronic device connected with the first measuring device and the second measuring device;

receiving a second acoustic signal sent by the second measuring device, wherein the second acoustic signal is sent by the second measuring device after the contact state of the right foot of the user with the ground is changed, and the second acoustic signal comprises a second system time of a processor of the second measuring device and an identifier of the second measuring device;

and obtaining a second transmission time length of the second sound signal according to the second sound signal, and sending the second transmission time length to the electronic equipment so that the electronic equipment can determine the moving distance of the user in two continuous steps according to the first transmission time length, the second transmission time length and the propagation speed of the sound wave in the air.

7. The measurement device of claim 6, wherein the instructions, when executed by the measurement device, cause the measurement device to perform the step of obtaining the second transmission duration of the second acoustic signal from the second acoustic signal comprises:

demodulating the second acoustic signal to obtain the second system time and the identification of the second measuring device;

determining whether the second acoustic signal is from the second measurement device according to the identification of the second measurement device;

if yes, acquiring the current third system time of the first measuring equipment;

and obtaining a second transmission duration of the second acoustic signal according to the third system time and the second system time.

8. The measurement device of claim 7, wherein the instructions, when executed by the measurement device, cause the measurement device to perform the step of determining from the identity of the second measurement device whether the second acoustic signal is from the second measurement device, further perform the step of:

The second acoustic signal is discarded if the second acoustic signal is not from the second measurement device.

9. An electronic device, comprising:

One or more processors; a memory; a plurality of applications; and one or more computer programs, wherein the one or more computer programs are stored in the memory, the one or more computer programs comprising instructions, which when executed by the electronic device, cause the electronic device to perform the steps of:

Receiving a first transmission time length sent by a second measuring device, wherein the first transmission time length is a transmission time length of a first sound wave signal, the first transmission time length is obtained by the second measuring device according to the first sound wave signal, and the first sound wave signal is sent to the second measuring device by a first measuring device configured on a left foot;

Receiving a second transmission time length sent by the first measurement device, wherein the second transmission time length is a transmission time length of a second acoustic signal, the second transmission time length is obtained by the first measurement device according to the second acoustic signal, and the second acoustic signal is sent to the first measurement device by the second measurement device configured on a right foot;

And determining the moving distance of the user in two continuous steps according to the first transmission time length, the second transmission time length and the propagation speed of the sound wave in the air.

10. The electronic device of claim 9, wherein the instructions, when executed by the electronic device, cause the electronic device to perform the step of determining the active distance of the user in two consecutive steps from the first transmission duration and the second transmission duration, and the propagation speed of sound waves in air, comprise:

calibrating the sum of the first transmission time length and the second transmission time length by using the time delay of modulating and demodulating the sound wave by the first measuring equipment and the time delay of modulating and demodulating the sound wave by the second measuring equipment to obtain the calibrated transmission time length;

And determining the continuous two-step active distance of the user according to the calibrated transmission time length and the propagation speed of the sound wave in the air.

11. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program which, when run on a computer, causes the computer to perform the method according to any of claims 1-3.

12. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program which, when run on a computer, causes the computer to perform the method according to any of claims 4-5.