CN216090480U

CN216090480U - Insole and plantar pressure value acquisition system

Info

Publication number: CN216090480U
Application number: CN202122484438.XU
Authority: CN
Inventors: 黎守新; 张中; 赵丹
Original assignee: Chengdu Zhikangtang Medical Technology Co ltd
Current assignee: Chengdu Zhikangtang Medical Technology Co ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-03-22
Anticipated expiration: 2031-10-15

Abstract

The utility model discloses an insole and a plantar pressure value acquisition system, wherein the insole is used for acquiring plantar pressure of a wearer and providing a pressure value of the pressure; the insole comprises an insole body (1), wherein the insole body (1) is configured for arranging a data conversion circuit; the data conversion circuit is used for sensing plantar pressure and providing a pressure value of the pressure, and is configured with: the pressure sensor is used for sensing the pressure of the sole of a foot; the single chip microcomputer is connected with the pressure sensor and used for converting the output of the pressure sensor into a pressure value; the data interaction unit is connected with the single chip microcomputer and used for data interaction; the insole body (1) is a PCB (printed circuit board), the PCB is a double-sided bonding pad, and the outlet wire welding end of the pressure sensor and the bonding pad of the PCB are arranged on two sides of the PCB. The pressure sensor is used for sensing the pressure of the sole of a foot, and the resistance value is converted into the pressure value by matching with the singlechip, so that the data analysis is facilitated; the insole is designed into a double-sided PCB, so that the circuit stability is ensured.

Description

Insole and plantar pressure value acquisition system

Technical Field

The utility model relates to an insole and a plantar pressure value acquisition system.

Background

The feet are the roots of standing and moving, the foot pressure is unstable, the roots are not firm, the patients suffer endless after suffering, the foot health is closely related to the health of the feet, the lower limbs and the spine, the foot health is closely related to the growth and development of infants, and the stress of hip joints and the spine is closely related to the health of the feet, the capability of moving and the endurance of the children. The foot is the main bearing part of the human body, and the normal heel and instep form an arch of foot through ligaments and joints, so that the foot has better elasticity, can buffer the impact and the shock of external force, and also plays a role in protecting the nerves of the sole of the foot during walking.

Therefore, the sole pressure has a crucial auxiliary analysis function for analyzing the health state of the human body, and has important significance for acquiring sole data.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an insole, which senses sole pressure and obtains a corresponding pressure value, so that data analysis is facilitated.

The insole provided by the utility model is used for acquiring the pressure of the sole of a wearer and providing a pressure value of the pressure; the insole comprises an insole body, wherein the insole body is configured for arranging a data conversion circuit; the data conversion circuit is used for sensing plantar pressure and providing a pressure value of the pressure, and is configured with:

the pressure sensor is used for sensing the pressure of the sole of a foot;

the single chip microcomputer is connected with the pressure sensor and used for converting the output of the pressure sensor into a pressure value;

the data interaction unit is connected with the single chip microcomputer and used for data interaction;

the insole is locally a PCB, the PCB is a double-sided bonding pad, and the wire-outgoing welding end of the pressure sensor and the bonding pad of the PCB are arranged on two sides of the PCB.

In some embodiments, the data conversion circuit is further configured with a wake-up detection unit connected with the single chip microcomputer; the wake-up detection unit comprises a comparator, a resistor R20 and a resistor R24, wherein the resistor R20 and the resistor R4 are connected between a circuit power supply and a circuit ground in series to form a voltage division circuit and provide a pressure threshold; the non-inverting input end and the output end of the comparator are respectively connected with the single chip microcomputer, and the inverting input end of the comparator is connected with the circuit ground through the resistor R24.

In some embodiments, the data conversion circuit is further configured with a power supply unit configured as a button lithium battery.

In some embodiments, the button lithium battery is a rechargeable lithium battery, the power supply unit further comprises a charging chip, a transient suppression diode D3, a capacitor C9, a capacitor C10, a resistor R12, a capacitor C11, a diode D4, a resistor R11, and a capacitor C12, the transient suppression diode D3, the capacitor C9, and the capacitor C10 are connected in parallel between the chip input pin and circuit ground; the resistor R12 is connected between the chip input pin and the enable pin, the anode of the diode D4 is connected with the output pin of the charging chip, the cathode of the diode D4 is connected with one end of the resistor R11, and the other end of the resistor R11 is used as an output end output circuit power supply VDD _ BAT to charge the rechargeable lithium battery; the capacitor C11 is connected between the anode of the diode D4 and circuit ground, and the capacitor C12 is connected between one end of the resistor R11 as an output terminal and circuit ground.

Another object of the present invention herein is to provide a plantar pressure value obtaining system, which includes:

the insole is configured to obtain a plantar pressure value, and the insole is provided by the utility model; and

and the terminal equipment is connected with the insole through a network to acquire the pressure value of the sole.

The technical scheme provided by the utility model at least can achieve the following beneficial effects: utilize pressure sensor response plantar pressure, the cooperation singlechip converts the resistance value into the pressure value, the data analysis of being convenient for, can directly carry out the analysis to this data if medical personnel.

The insole body is designed into a double-sided PCB, so that circuit layout and wiring are facilitated, interference caused by wiring is reduced, and circuit stability is guaranteed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model. It is obvious that the drawings in the following description are only some embodiments of the utility model, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic view of the construction of an insole provided by the present invention;

FIG. 2 is a schematic block diagram of a data conversion circuit provided by the present invention;

FIG. 3 is a schematic circuit diagram of the single chip microcomputer provided by the utility model;

FIG. 4 is a schematic circuit diagram of a wake-up detection unit according to the present invention;

FIG. 5 is a schematic circuit diagram of a Bluetooth module provided in the present invention;

FIG. 6 is a schematic circuit diagram of a Micro USB interface module according to the present invention;

FIG. 7 is a schematic circuit diagram of a power supply unit provided by the present invention;

FIG. 8 is a graph of resistance versus pressure;

in the drawings: 1-insole body, 2-pressure sensor; the pins labeled Sen 0-Sen 7 in FIG. 2 are shown connected to the pressure sensor; the numbers in the circles in fig. 1 represent the numbers of the pressure sensors.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

In order to acquire the pressure of the sole of a foot and express the pressure in the form of a pressure value, the utility model provides an insole which is used for acquiring the pressure of the sole of the foot of a wearer and providing the pressure value of the pressure. Referring to fig. 1, the insole includes an insole body 1, the insole body 1 is configured for data conversion circuit layout; the data conversion circuit is used for sensing the pressure of the sole of a foot and providing a pressure value of the pressure. Referring to fig. 2, the data conversion circuit is configured with:

the pressure sensor 2 is used for sensing the pressure of the sole;

the single chip microcomputer U2 is connected with the pressure sensor 2 and used for converting the output of the pressure sensor 2 into a pressure value;

the data interaction unit is connected with the single chip microcomputer U2 and used for data interaction;

the awakening detection unit is connected with the single chip microcomputer U2 and is configured for awakening the single chip microcomputer U2; and

and the power supply unit is configured to provide working voltage for the pressure sensor 2, the singlechip U2, the wake-up detection unit and the data interaction unit.

Wherein insole body 1 is the PCB board, and the PCB board is two-sided pad, and pressure sensor 2 is qualified for the next round of competitions welding end and PCB board pad and is laid in PCB board both sides.

Herein, the pressure sensor adopts a resistance strain sensor, and when the resistance strain sensor is subjected to an external force, the deformation of an internal metal conductor of the resistance strain sensor is converted into resistance change, and the specific change is as follows: the metal conductor is subjected to axial tension, the length of the metal conductor is increased, the cross-sectional area of the metal conductor is reduced, the resistance is increased, and conversely, the resistance is reduced. The resistance strain sensor outputs the existing resistance value under the action of external force, the resistance value is input into the single chip microcomputer U2, and the single chip microcomputer U2 obtains a pressure value according to a resistance-pressure relation curve shown in the figure 8; in some embodiments, a piezoelectric sensor may be used, when the piezoelectric sensor receives an external force, charges are generated on the surface of the piezoelectric sensor, the charges are amplified and transformed by a charge amplifier and a measuring circuit integrated in the piezoelectric sensor to impedance, and then the impedance is converted into electric quantity in a direct proportion relation with the external force applied to the piezoelectric sensor, and the electric quantity is input into the single chip microcomputer U2, the single chip microcomputer U2 converts the electric quantity output by the pressure sensor into a corresponding resistance value, and then the electric quantity is converted into a pressure value according to a resistance-pressure relation curve shown in fig. 8.

The single chip microcomputer U2 is used for storing a computer program which is programmed and debugged successfully, and can execute the computer program, and when the computer program is executed, the resistance value output by the pressure sensor is converted into a pressure value according to a resistance-pressure relation curve; or converting the electric quantity output by the pressure sensor into a corresponding resistance value, and then converting the resistance value output by the pressure sensor into a pressure value according to the resistance-pressure relation curve of fig. 8.

The single chip microcomputer U2 is not limited to a specific single chip microcomputer or a series of single chip microcomputers, and can store and execute a computer program, such as an AT89C52 single chip microcomputer, an STC series single chip microcomputer, an ATM series single chip microcomputer, and the like.

Referring to fig. 3, an STM32 series single chip microcomputer is adopted as a single chip microcomputer U2, and peripheral circuits of the single chip microcomputer U2 include an inductor L1, a capacitor C3, a capacitor C4, a resistor R1, a resistor R4, a capacitor C6, an inductor L2, a capacitor C7, a capacitor C8 and a capacitor C5; the circuit power supply VDD _ BAT outputs a working voltage MCU _3V of the singlechip U2 after passing through an inductor L1, and the working voltage MCU _3V is loaded on a power supply pin of the singlechip U2, and a capacitor C3 and a capacitor C4 are used for filtering the output of the inductor L1, so that the voltage loaded on the power supply pin of the singlechip U2 is stable.

The voltage MCU _3V output by the inductor L1 is input into an NRST pin of the singlechip U2 through a resistor R4 and is grounded through a capacitor C8; the voltage MCU _3V also forms a VDDA power supply after passing through an inductor L2, the VDDA power supply is configured and loaded on a VDDA pin of the singlechip U2, and the VDDA power supply is grounded through a capacitor C7; the output of the pressure sensor is input into the single chip microcomputer U2 through a resistor, and pins of the single chip microcomputer U2 used for loading the output of the pressure sensor are also connected with a VDDA power supply through pull-up resistors respectively. The number of the resistors is matched with that of the pin book loaded by the single chip microcomputer U2 as the output of the pressure sensor, if 8 pressure sensors are distributed, 8 resistors are correspondingly distributed; referring to fig. 3, a resistor R6 to a resistor R8, and a resistor R13 to a resistor R17 are set as pull-up resistors, respectively. The capacitor C8\ C5 is used for filtering, and the resistor R1 is connected in series between the starting selection pin BOOT1 of the singlechip U2 and the circuit ground and is used for providing a starting signal of the singlechip U2.

The awakening detection unit in the conversion circuit is used for awakening the single chip microcomputer U2 when the pressure sensor outputs, so that the single chip microcomputer U2 executes a computer program stored in the single chip microcomputer U2 to convert the resistance value and the pressure value. Referring to fig. 4, the wake-up detection unit used herein includes a comparator U4, a resistor R20, a resistor R24, and a capacitor C13, wherein the resistor R20 and the resistor R24 are connected in series between a circuit power supply VDD _ BAT and a circuit ground to form a voltage dividing circuit, provide a voltage threshold, and input the voltage threshold to an inverting input terminal of the comparator U4, a non-inverting input terminal of the comparator U4 is connected to the single chip microcomputer U2, and an output terminal is connected to the single chip microcomputer U2 directly or through a resistor R19; the capacitor C13 is used for filtering.

The working principle of the wake-up detection unit provided herein is such that: when external force acts on the pressure sensor, the pressure sensor outputs, the output is input into the single chip microcomputer U2, the single chip microcomputer U2 outputs, and the output is input into the non-inverting input end of the comparator U4 through the diode D1/the diode D2; according to the setting, when the signal of the non-inverting input end of the comparator U4 is larger or smaller than the signal of the inverting input end, an output exists, the output is input into the single chip microcomputer U2, the single chip microcomputer U2 runs the stored computer program, and the conversion of the resistance value and the pressure value is executed.

The data interaction unit in the conversion circuit is connected with the single chip microcomputer U2 and used for achieving data interaction, and external terminal equipment can be connected with the single chip microcomputer U2 through the data interaction unit to achieve data interaction. The data interaction unit may be:

1) the Bluetooth module can be matched with terminal equipment with a Bluetooth function, any Bluetooth module can be adopted, the effective distance of the Bluetooth module configured in the text is 5M, and 5V/2mA USB charging is supported. Specifically, referring to fig. 5, the bluetooth module configured herein includes a bluetooth chip U1 and a light emitting diode D5, a low power supply terminal of the bluetooth chip U1 is grounded via a capacitor C2, a high power supply terminal is connected to a circuit power supply VDD _ BAT via a capacitor C1, and a capacitor C1 is also connected to a circuit; the anode of the light-emitting diode D5 is connected with a status pin of the Bluetooth chip U1 and is used for indicating the working status of the Bluetooth module, if the Bluetooth module is in the working status, the light-emitting diode D5 emits light, otherwise, the light-emitting diode D5 is turned off; the cathode of the light-emitting diode D5 is directly connected with the circuit ground or is connected with the circuit ground through the resistor R26; the Bluetooth chip U1 is directly connected with the singlechip U2, or is respectively connected with the singlechip U2 through a resistor R2, a resistor R3 and a resistor R9, or the Bluetooth chip U1 is respectively connected with the interface J1 or is directly connected with the interface J1 through a resistor R2, a resistor R3 and a resistor R9, and the interface J1 is connected with the singlechip U2.

2) And the Micro USB interface module is connected with the terminal equipment through a data line to realize data interaction. Referring to fig. 6, the Micro USB interface module configured herein includes a Micro USB interface J3, a transient suppression diode D6, a transient suppression diode D7, and a transient suppression diode D8, where the Micro interface J3 is directly connected to the single chip microcomputer U2 or is connected to the single chip microcomputer U2 through a resistor R21, a resistor R22, and a resistor R23, respectively; the transient suppression diode D7, the transient suppression diode D6 and the transient suppression diode D6 are respectively connected between a pin connected with the singlechip U2 and a circuit ground.

3) Bluetooth module and Micro USB interface module, Bluetooth module and Micro USB interface module can adopt above-mentioned circuit structure.

The power supply unit herein adopts one of the following circuit structures:

1) the chip is configured with a chip for processing a power supply VDD _5V, a transient suppression diode D3, a capacitor C9, a capacitor C10, a resistor R12, a capacitor C11, a resistor R11 and a capacitor C12, wherein the transient suppression diode D3, the capacitor C9 and the capacitor C10 are connected between an input pin of the chip and a circuit ground in parallel; the resistor R12 is connected between the chip input pin and the enable pin, one end of the resistor R11 is connected with the chip output pin, and the other end of the resistor R11 is used as an output end output circuit power supply VDD _ BAT to provide working voltage for the pressure sensor, the single chip microcomputer, the awakening detection unit and the data interaction unit; the capacitor C11 is connected between the end of the resistor R11 connected to the chip output pin and circuit ground, and the capacitor C12 is connected between the end of the resistor R11 serving as the output terminal and circuit ground.

The output of the charging chip adopted by the chip is directly provided for the pressure sensor, the single chip microcomputer, the awakening detection unit and the data interaction unit. In other embodiments, the chip is a voltage stabilization chip.

2) The power supply unit is configured as a button lithium battery J2.

3) The power supply unit is configured as a button lithium battery J2 configured as a rechargeable button lithium battery; referring to fig. 7, the power supply unit is further configured with a charging chip U3, a transient suppression diode D3, a capacitor C9, a capacitor C10, a resistor R12, a capacitor C11, a diode D4, a resistor R11, and a capacitor C12, wherein the transient suppression diode D3, the capacitor C9, and the capacitor C10 are connected in parallel between the chip input pin and the circuit ground; the resistor R12 is connected between the chip input pin and the enable pin, the anode of the diode D4 is connected with the output pin of the charging chip U3, the cathode of the diode D4 is connected with one end of the resistor R11, and the other end of the resistor R11 is used as an output end output circuit power supply VDD _ BAT to charge the button lithium battery J2; the capacitor C11 is connected between the anode of the diode D4 and circuit ground, and the capacitor C12 is connected between the output terminal of the resistor R11 and circuit ground.

A capacitor C9, a capacitor C10, a capacitor C11 and a capacitor C12 are arranged in the power supply unit and used for filtering a power supply, a resistor R12 is used for providing an enabling signal, and a resistor R11 is used for limiting current. The diode D4 is used as a one-way switch to prevent the electricity of the rechargeable button lithium battery from reversely flowing into the rechargeable chip U3 to affect the stability of the rechargeable button lithium battery.

Herein, the power supply VDD _5V is provided through a USB interface, or provided by a lithium battery, or provided by a dry battery.

The transient suppression diodes are arranged in each functional circuit and used for absorbing surge power, so that the voltage between the two electrodes is clamped at a preset value, and components in each functional circuit are effectively protected from being damaged by various surge pulses.

Referring to fig. 1, the pressure sensors 2 are distributed at any position on the insole body 1 according to the situation, for example, the pressure sensors 2 are distributed in the forefoot region, the outer side of the arch and the rearfoot region of the insole body 1; or only in the forefoot region, the outer arch or the rearfoot region of the insole body 1. The number of the pressure sensors 2 is set according to the situation, such as 3, 5, 8, 10, the distribution number and the positions of the pressure sensors 2 on the insole bodies 1 of the left foot and the right foot can be the same or different, and as shown in fig. 1, the distribution number and the positions of the pressure sensors 2 on the insole bodies 1 of the left foot and the right foot are the same, so that 8 point-by-2 point insoles are formed. The distributed pressure sensors 2 are connected with a single chip microcomputer U2 through wiring.

To ensure the comfort of the insole model, the pressure sensor 2 may be a flexible nano pressure sensor.

The insole provided by the utility model is assembled on the sole, the pressure of the sole is sensed in real time to form a pressure value, and the pressure value is transmitted to the terminal equipment through the data interaction module in a network state or is read by the terminal equipment through the data interaction module in the network state, so that the terminal equipment obtains the pressure value. The pressure value is directly provided by the insole, and the terminal equipment can directly use or store the pressure value.

The network state here may be a wireless network state, such as a bluetooth network state; or in a wired network state, such as by using a Micro USB interface in conjunction with a data line.

The flow between the insole and the terminal device is as follows:

step 1: and the terminal equipment searches the insole model Bluetooth and matches.

Step 2: after pairing is successful, the insole model broadcasts BLE broadcast data and BLE transparent transmission data to the terminal equipment; the data is in byte format, the terminal equipment receives the data and then the data is analyzed, and the insole model converts the resistance value into a pressure value;

and step 3: and after the terminal equipment receives the data and completes single interaction, the data can be sent to the paired terminal equipment again when the pressure value of the insole model changes every time, and if the paired terminal equipment is disconnected, the insole model enters a dormant working state.

The steps 1 to 3 are explained based on the case that the insole module comprises a bluetooth module, and if the insole comprises a Micro USB interface, the insole module is connected with the terminal device through a data line to realize data transmission/reading.

The terminal equipment obtains the pressure value, and can perform processing display for use; or directly storing the data for use when the data is required to be used. If provide this pressure value for medical personnel and be used for providing the auxiliary analysis effect to human health state analysis, this data can assist professional medical personnel to the analysis of pregnant woman's backbone health state, the relevant patient's of backbone recovered condition analysis, the healthy state analysis of teenagers ' backbone growth and development and backbone health state such as middle aged and old people's backbone health state, perhaps to the analysis of lying-in woman's pelvis recovery condition.

The terminal device described herein may be any device supporting USB access and bluetooth, such as a computer and a mobile phone.

The above embodiments are only for illustrating the technical solutions of the present invention and are not limited, and modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention are included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An insole, which is characterized in that the insole is used for acquiring the pressure of the sole of a wearer and providing a pressure value of the pressure; the insole comprises an insole body (1), wherein the insole body (1) is configured for arranging a data conversion circuit; the data conversion circuit is used for sensing plantar pressure and providing a pressure value of the pressure, and is configured with:

the pressure sensor is used for sensing the pressure of the sole of a foot;

the insole body (1) is a PCB (printed circuit board), the PCB is a double-sided bonding pad, and the outlet wire welding end of the pressure sensor and the bonding pad of the PCB are arranged on two sides of the PCB.

2. The insole of claim 1, wherein said pressure sensor is a flexible nano-pressure sensor.

3. The insole according to claim 1, wherein said pressure sensors are arranged distributed in the forefoot region, the outer arch and the rearfoot region of said insole body (1).

4. The insole according to claim 1, wherein said data conversion circuit is further configured with a wake-up detection unit connected to said single chip; the wake-up detection unit comprises a comparator, a resistor R20 and a resistor R24, wherein the resistor R20 and the resistor R4 are connected between a circuit power supply and a circuit ground in series to form a voltage division circuit and provide a pressure threshold; the non-inverting input end and the output end of the comparator are respectively connected with the single chip microcomputer, and the inverting input end of the comparator is connected with the circuit ground through the resistor R24.

5. The insole of claim 1, wherein said data conversion circuitry is further configured with a power supply unit configured as a button lithium battery.

6. The insole of claim 5, wherein: the button lithium battery is a rechargeable lithium battery, the power supply unit further comprises a rechargeable chip, a transient suppression diode D3, a capacitor C9, a capacitor C10, a resistor R12, a capacitor C11, a diode D4, a resistor R11 and a capacitor C12, and the transient suppression diode D3, the capacitor C9 and the capacitor C10 are connected between the chip input pin and a circuit ground in parallel; the resistor R12 is connected between the chip input pin and the enable pin, the anode of the diode D4 is connected with the output pin of the charging chip, the cathode of the diode D4 is connected with one end of the resistor R11, and the other end of the resistor R11 is used as an output end output circuit power supply VDD _ BAT to charge the rechargeable lithium battery; the capacitor C11 is connected between the anode of the diode D4 and circuit ground, and the capacitor C12 is connected between one end of the resistor R11 as an output terminal and circuit ground.

7. The insole according to claim 1, wherein said single chip microcomputer comprises STM32 series single chip microcomputer, inductor L1, capacitor C3, capacitor C4, resistor R1, resistor R4, capacitor C6, inductor L2, capacitor C7, capacitor C8 and capacitor C5; the circuit power supply VDD _ BAT outputs the singlechip working voltage MCU _3V to be loaded on a power supply pin of the singlechip after passing through the inductor L1, and the capacitor C3 and the capacitor C4 are used for filtering the output of the inductor L1 so as to stabilize the voltage loaded on the power supply pin of the singlechip; the voltage MCU _3V output by the inductor L1 is input into an NRST pin of the singlechip through the resistor R4 and is grounded through the capacitor C8; the voltage MCU _3V also forms a VDDA power supply after passing through the inductor L2, and the VDDA power supply is configured and loaded on a VDDA pin of the singlechip and is grounded through the capacitor C7.

8. The insole of claim 1, wherein said data interaction unit is configured as a bluetooth module, said bluetooth module having an effective distance of 5M.

9. The insole according to claim 1, wherein said data interaction unit is configured as a Micro USB interface module, or said data interaction unit is configured as a bluetooth module and a Micro USB interface module.

10. A plantar pressure value acquisition system is characterized by comprising:

an insole configured to obtain a plantar pressure value, the insole being in accordance with any one of claims 1-9; and