CN111568405A - Wearable impact detection device based on MEMS six sensors - Google Patents

Abstract

The invention discloses a wearable impact detection device based on a MEMS six-axis sensor, comprising a main control module, a MEMS six-axis sensor module, a heart rate sensor module, a communication and positioning module, a display screen, a power supply module and a vibration module. The invention embeds a MEMS six-axis sensor for impact detection into a wearable device on the wrist to detect whether a user has a collision accident such as a car accident or a high-altitude fall, and automatically triggers an alarm to notify family members and medical staff after the collision is detected. ; So that the user who has an impact can be treated in time, and to a certain extent, it is avoided that the user loses precious life due to the untimely rescue. If the smart watch bracelet products on the existing market adopt the technical solution of the present invention, the function of impact detection can be provided without sacrificing the original function.

Description

A wearable impact detection device based on MEMS six-axis sensor

technical field

The invention relates to the field of impact detection, in particular to a wearable impact detection device based on a MEMS six-axis sensor.

Background technique

With the advancement of technology and the development of the times, all kinds of wearable devices have gradually entered the public eye and played a pivotal role in daily life. The emergence of MEMS technology has made various components and sensors more and more integrated, and the volume is getting smaller and smaller, so various MEMS sensors are embedded in wearable devices.

In recent years, collision accidents such as car accidents and high-altitude falls have occurred from time to time, and many people have been injured or even lost their lives. Part of the reason is that such accidents cannot be detected and the alarm is not timely enough, resulting in missing the best treatment time. Lose precious lives. If the MEMS six-axis sensor used to detect impact is embedded in the wearable device, it can detect whether the user has an impact at any time, and automatically trigger an alarm after detecting the impact. Therefore, how to develop a wearable impact detection device based on MEMS six-axis sensor has become a problem worth solving.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, and propose a wearable impact detection device based on a MEMS six-axis sensor. The technical scheme used in the present invention is:

A wearable impact detection device based on a MEMS six-axis sensor, comprising a main control module, a MEMS six-axis sensor module, a heart rate sensor module, a communication and positioning module, a display screen, a power supply module and a vibration module; the MEMS six-axis sensor The module is connected to the main control module through USART; the heart rate sensor module is connected to the main control module through I2C; the communication and positioning module is connected to the main control module through USART; the display screen is connected to the main control module through USART. the main control module is connected; the power module is connected to the main control module through ADC; the vibration module is connected to the main control module through PWM.

the display screen is arranged on the top layer of the impact detection device;

The main control module, the MEMS six-axis sensor module, the communication and positioning module and the vibration module are arranged on the second layer of the impact detection device;

the power module is arranged on the third layer of the impact detection device;

The heart rate sensor module is arranged on the bottom layer of the impact detection device.

The MEMS six-axis sensor module, the communication and positioning module and the vibration module are arranged around the main control module.

The main control module is specifically the STM32F103VET6 minimum system;

The MEMS six-axis sensor module is specifically JY61;

The heart rate sensor module is specifically MAX30100;

The communication and positioning module is specifically SIM868;

The display screen is specifically a 2.4-inch TJC3224T024_011R touch screen;

The power module is specifically a 900mAh 803040 lithium battery;

The vibration module is specifically a 1027 vibration motor.

算出合加速度和合角速度，所述主控模块通过合加速度和合角速度两种数据来判断用户是否发生撞击。The MEMS six-axis sensor module detects the acceleration and angular velocity on the X, Y, and Z axes of the three-dimensional space generated during movement, and transmits the acquired acceleration and angular velocity data to the main control module, which uses the formula

Calculate the resultant acceleration and the resultant angular velocity, and the main control module judges whether the user has a collision through two data of the resultant acceleration and the resultant angular velocity.

When any one of the resultant acceleration and the resultant angular velocity exceeds the threshold, the vibration module will continue to vibrate from weak to strong for 10 seconds, and at the same time, the display screen will prompt "whether to cancel the alarm".

The threshold value of the resultant acceleration is: 30 m/s ² ; the threshold value of the resultant angular velocity is: 200°/s.

If the user clicks the "Confirm Cancel" button on the display screen within 10 seconds of the vibration module, the vibration module stops vibration;

If the user clicks the "Alarm Immediately" button on the display screen within 10 seconds of the vibration module or the user does not take any action after 10 seconds, the vibration module stops the vibration, and the heart rate sensor module immediately collects the user's heart rate At the same time, the communication and positioning module obtains the user's location information, and sends a short message of the user's heart rate and location information to the pre-set numbers of family members and medical staff, notifying the family members and medical staff to come to rescue as soon as possible. .

The beneficial effects of the present invention are:

The advantage of the present invention is that the MEMS sensor for detecting impact is embedded in the wearable device on the wrist, which is used to detect whether the user has a collision accident such as a car accident or a high-altitude fall, and automatically triggers an alarm to notify family members and family members after the collision is detected. medical staff. In this way, the user who has the collision can be rescued in time, and to a certain extent, the loss of precious life of the user due to untimely rescue can be avoided. If the smart watch bracelet products on the existing market adopt the technical solution of the present invention, the function of impact detection can be provided without sacrificing the original function.

Description of drawings

1 is a schematic diagram of the overall connection of a wearable impact detection device based on a MEMS six-axis sensor of the present invention;

FIG. 2 is a schematic structural diagram of a wearable impact detection device based on a MEMS six-axis sensor according to the present invention.

In the figure: 1. Main control module; 2. MEMS six-axis sensor module; 3. Heart rate sensor module; 4. Communication and positioning module; 5. Display screen; 6. Power supply module; 7. Vibration module.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Example: See Figures 1-2.

Referring to FIG. 1 , a wearable impact detection device based on a MEMS six-axis sensor includes a main control module 1 , a MEMS six-axis sensor module 2 , a heart rate sensor module 3 , a communication and positioning module 4 , a display screen 5 , and a power supply module 6 and vibration module 7. The MEMS six-axis sensor module 2 is connected to the main control module 1 through USART; the heart rate sensor module 3 is connected to the main control module 1 through I2C; the communication and positioning module 4 is connected to the main control module through USART. Module 1 is connected; the display screen 5 is connected to the main control module 1 through USART; the power module 6 is connected to the main control module 1 through ADC; the vibration module 7 is connected to the main control module 1 through PWM connected.

Referring to FIG. 2, the impact detection device is divided according to the number of layers: the display screen 5 is arranged on the top layer of the impact detection device; the main control module 1, the MEMS six-axis sensor module 2, the communication and positioning module 4 and the vibration The module 7 is arranged on the second layer of the impact detection device, and the MEMS six-axis sensor module 2, the communication and positioning module 4 and the vibration module 7 are all arranged around the main control module 1; the power module 6 is provided with On the third layer of the impact detection device; the heart rate sensor module 3 is arranged on the bottom layer of the impact detection device.

算出合加速度和合角速度，所述主控模块1通过合加速度和合角速度两种数据来判断用户是否发生撞击。The MEMS six-axis sensor module detects the acceleration and angular velocity on the X, Y, and Z axes of the three-dimensional space generated during movement, and transmits the acquired acceleration and angular velocity data to the main control module 1. The main control module 1 Use the formula

Calculate the resultant acceleration and the resultant angular velocity, and the main control module 1 judges whether the user has a collision according to the two kinds of data of the resultant acceleration and the resultant angular velocity.

When any one of the resultant acceleration and the resultant angular velocity exceeds the threshold, the vibration module 7 will continue to vibrate from weak to strong for 10 seconds, and the display screen 5 will prompt "whether to cancel the alarm".

The threshold value of the resultant acceleration is: 30 m/s ² .

The threshold value of the closing angular velocity is: 200°/s.

If the user clicks the "Confirm Cancel" button on the display screen 5 within 10 seconds of the vibration module 7, the vibration module 7 stops the vibration.

If the user clicks the "Alarm immediately" button of the display screen 5 within 10 seconds of the vibration module 7 or the user does not take any action after 10 seconds, the vibration module 7 stops the vibration, and the heart rate sensor module 3 immediately Collect the user's heart rate, and at the same time the communication and positioning module 4 obtains the user's location information, and sends the user's heart rate and location information to a short message to the number of the family members and medical staff set in advance, notifying the family members and medical staff to come as soon as possible. rescue.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that the specific embodiments of the present invention can still be modified. Or equivalent replacements, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention, should all be included in the scope of the claims of the present invention.

Claims (8)

1. A wearable impact detection device based on an MEMS six-axis sensor comprises a main control module (1), an MEMS six-axis sensor module (2), a heart rate sensor module (3), a communication and positioning module (4), a display screen (5), a power supply module (6) and a vibration module (7); the MEMS six-axis sensor module (2) is connected with the main control module (1) through a USART; the heart rate sensor module (3) is connected with the main control module (1) through I2C; the communication and positioning module (4) is connected with the main control module (1) through a USART; the display screen (5) is connected with the main control module (1) through a USART; the power supply module (6) is connected with the main control module (1) through an ADC; the vibration module (7) is connected with the main control module (1) through PWM.

2. The wearable impact detection device based on the MEMS six-axis sensor of claim 1, wherein the device is divided by the number of layers as follows:

the display screen (5) is arranged on the top layer of the impact detection device;

the main control module (1), the MEMS six-axis sensor module (2), the communication and positioning module (4) and the vibration module (7) are arranged on a second layer of the impact detection device;

the power supply module (6) is arranged on the third layer of the impact detection device;

the heart rate sensor module (3) is arranged on the bottom layer of the impact detection device.

3. The wearable impact detection device based on MEMS six-axis sensors according to claim 2, characterized in that the MEMS six-axis sensor module (2), communication and positioning module (4) and shaking module (7) are arranged around the master module (1).

4. The wearable impact detection device based on the MEMS six-axis sensor of claim 1, wherein:

the main control module (1) is specifically an STM32F103VET6 minimum system;

the MEMS six-axis sensor module (2) is JY 61;

the heart rate sensor module (3) is MAX30100 specifically;

the communication and positioning module (4) is specifically a SIM 868;

the display screen (5) is specifically a 2.4-inch TJC3224T024_011R touch screen;

the power supply module (6) is specifically a 900 milliamp 803040 lithium battery;

the vibration module (7) is specifically a 1027 vibration motor.

5. The wearable impact detection device based on MEMS six-axis sensor of claim 4, characterized in that the MEMS six-axis sensor module (2) detects acceleration and angular velocity on X, Y, Z axis in three-dimensional space generated during motion and transmits the obtained acceleration and angular velocity data to the main control module (1), and the main control module (1) utilizes public sensor to detect the acceleration and angular velocityFormula (II)

And calculating the resultant acceleration and the resultant angular velocity, and judging whether the user is impacted or not by the main control module (1) through the resultant acceleration and the resultant angular velocity.

6. The wearable impact detection device based on the MEMS six-axis sensor according to claim 5, characterized in that when any one of the resultant acceleration and the resultant angular velocity exceeds a threshold, the vibration module (7) continuously vibrates from weak to strong for 10 seconds, and the display screen (5) prompts whether to cancel the alarm or not.

7. The wearable impact detection device based on the MEMS six-axis sensor of claim 6, wherein the threshold of the resultant acceleration is: 30m/s²(ii) a The threshold value of the resultant angular velocity is: 200 DEG/s.

8. The wearable impact detection device based on the MEMS six-axis sensor of claim 6, wherein:

if the user clicks a 'confirm cancel' button of the display screen (5) within 10 seconds of the vibration module (7), the vibration module (7) stops vibrating;

if the user is in click in 10 seconds of vibrations module (7) "report to the police immediately" button of display screen (5) or the user does not take any operation after 10 seconds, then vibrations module (7) stops vibrations, user's rhythm of the heart is gathered immediately in rhythm of the heart sensor module (3), simultaneously communication and orientation module (4) acquire user's positional information to send the SMS with user's rhythm of the heart and positional information and give the number of family members and medical personnel who set for in advance, inform family members and medical personnel to rescue as soon as possible.

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