CN212971922U - Intelligent insole capable of monitoring plantar pressure in real time - Google Patents
Intelligent insole capable of monitoring plantar pressure in real time Download PDFInfo
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- CN212971922U CN212971922U CN202020570190.1U CN202020570190U CN212971922U CN 212971922 U CN212971922 U CN 212971922U CN 202020570190 U CN202020570190 U CN 202020570190U CN 212971922 U CN212971922 U CN 212971922U
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Abstract
The utility model provides a plantar pressure real-time supervision's intelligent shoe-pad, include: a bottom electrode layer (1); the middle dielectric layer (2) is arranged on the upper surface of the bottom electrode layer (1) and is of a porous structure, the porous structure is a through hole and is perpendicular to the bottom electrode layer (1), the middle dielectric layer (2) is made of Ecoflex silica gel, and the middle dielectric layer is in a shoe pad shape; the top electrode layer (3) is arranged on the upper surface of the middle dielectric layer (2) and forms a capacitor structure with the bottom electrode layer (1); and the shielding layer (4) is arranged on the upper surface of the top electrode layer (3) and is of a conductive structure. The laser cutting technology is adopted to obtain the porous structure of the middle medium layer, so that the sensitivity of the sensor is improved, and the intelligent insole for monitoring the pressure of the soles in real time is prepared in an integrated manner. Has the advantages of low cost, large-scale preparation, customized customization and the like; and adopt wireless transmission and receiving module, characteristics such as realization wearable and wireless transmission.
Description
Technical Field
The utility model relates to an intelligence sensing technology field especially relates to plantar pressure real-time supervision's intelligent shoe-pad.
Background
With the improvement of the technological level and the medical capability, the life of human beings is prolonged, the birth rate of the population is reduced, and aging is one of the problems which need to be solved urgently, and the early diagnosis and prevention of diseases are more and more important. At present, a non-invasive mode is adopted, and various physiological signals can be monitored by wearing health monitoring intelligent equipment, so that the effect of early diagnosis or prevention is achieved.
The capacitance sensor is used as a pressure sensing module due to the advantages of simple structure, low power, easy large-area preparation, good stability and the like, an elastomer with low Young modulus is usually adopted as an intermediate dielectric layer, so that not only can the sensitivity but also the comfort degree be improved, and a foam structure or various microstructures are usually adopted to increase the air rate of the dielectric layer so as to further improve the sensitivity of the sensor. Generally, the preparation process of the microstructure in the elastic medium layer is complex, so that more materials are wasted, the cost is increased, various electronic elements are generally assembled in the traditional intelligent insole, the thickness and the volume of the insole are increased, and the comfort and the experience of a user are influenced.
Disclosure of Invention
Technical problem to be solved
The utility model provides a plantar pressure real-time supervision's intelligent shoe-pad solves above technical problem at least.
(II) technical scheme
An intelligent insole for monitoring plantar pressure in real time comprises: the bottom electrode layer 1, the bottom electrode layer 1 is grounded; the middle dielectric layer 2 is arranged on the upper surface of the bottom electrode layer 1 and is of a porous structure, the porous structure is a through hole and is vertical to the bottom electrode layer 1, the middle dielectric layer 2 is made of Ecoflex silica gel, and the middle dielectric layer is in a shoe pad shape; the top electrode layer 3 is arranged on the upper surface of the middle dielectric layer 2 and forms a capacitor structure with the bottom electrode layer 1; the shielding layer 4 is arranged on the upper surface of the top electrode layer 3 and is of a conductive structure; an insulating layer is arranged between the top electrode layer 3 and the shielding layer 4, and the thickness of the insulating layer is smaller than 1 mm.
Optionally, the middle medium layer 2 includes an array of 24 cylinders, each cylinder being of a porous structure.
Optionally, the porous structure is uniformly arranged on the cylinder.
Alternatively, the radius of the cylinder is 2.5mm and the radius of each hole in the porous structure is 600 μm.
Optionally, the number of the holes on each cylinder is 7, and the holes are arranged in a hexagonal shape on the cylinder.
Alternatively, the top electrode layer 3 is a circular plate array structure, and each circular plate corresponds to a cylinder.
Optionally, the circular plate array and the bottom electrode layer 1 form a capacitor array, the capacitor array is divided into two parts and is respectively connected with the acquisition interface of an AD7147 chip, and an AC shield pin of the AD7147 chip is connected with the shielding layer 4.
Optionally, the AD7147 chip merges the acquired capacitance data into one frame of data, the AD7147 chip further includes an SCI asynchronous serial interface and a wireless serial port, and the AD7147 chip sends the merged data to the wireless serial port through the SCI asynchronous serial interface, so that the data is output in a radio wave manner.
Optionally, the intelligent insole for monitoring plantar pressure in real time further comprises a display terminal, and the display terminal is used for converting the capacitance data into pressure data and visually displaying the capacitance data and the pressure data.
(III) advantageous effects
The utility model provides an intelligent shoe-pad of plantar pressure real-time supervision, adopt the laser cutting technique to obtain the porous structure improvement sensor's of middle dielectric layer sensitivity, and adopt this kind of technique to prepare the intelligent shoe-pad of plantar pressure real-time supervision, be used for the real-time simulation and the sensing of foot dynamic pressure, this intelligent shoe-pad is when receiving external pressure, the middle dielectric layer of the capacitive sensor array point on the shoe-pad changes, lead to the capacitance value to change, consequently, just can obtain the size of plantar pressure distribution according to the change of the capacitance value of the sensor of array point on the shoe-pad. Has the advantages of low cost, large-scale preparation, customized customization and the like; and adopt wireless transmission and receiving module, characteristics such as realization wearable and wireless transmission.
Drawings
Fig. 1 schematically shows a schematic structural diagram of an intelligent insole for real-time monitoring of plantar pressure according to an embodiment of the present disclosure;
FIG. 2 schematically illustrates a structural schematic of an intermediate dielectric layer according to an embodiment of the disclosure;
FIG. 3 schematically illustrates a rate of change of capacitance of a single capacitive sensor having a porous structure compared to a single capacitive sensor without a porous structure, in accordance with an embodiment of the disclosure;
FIG. 4 schematically illustrates a schematic diagram of a circular plate according to an embodiment of the disclosure;
FIG. 5 schematically illustrates a functional schematic of a capacitive sensor array according to an embodiment of the present disclosure;
FIG. 6 schematically illustrates a response curve of a rate of change of capacitance of a capacitive sensor with gradual increase and decrease in applied stress for a single capacitive sensor of an embodiment of the disclosure;
FIG. 7 schematically illustrates a recovery curve of a rate of change of capacitance of a capacitive sensor with gradual increase and decrease in applied stress for a single capacitive sensor corresponding to FIG. 6 in accordance with an embodiment of the disclosure;
FIG. 8 schematically illustrates the response time of a capacitive sensor with a single capacitive sensor applying and removing stress according to an embodiment of the disclosure;
FIG. 9 schematically illustrates 15000 cycles of relative capacitance change at a pressure of 50kPa in accordance with an embodiment of the disclosure;
fig. 10 schematically shows a dynamic real-time simulation of the pressure distribution of the sole of a foot during walking of a person wearing the intelligent insole with real-time monitoring of the pressure on the sole of the foot according to an embodiment of the disclosure.
Detailed Description
An intelligent insole for monitoring plantar pressure in real time is shown in figure 1 and comprises: the bottom electrode layer 1, the bottom electrode layer 1 is grounded; the middle dielectric layer 2 is arranged on the upper surface of the bottom electrode layer 1 and is of a porous structure, the porous structure is a through hole and is vertical to the bottom electrode layer 1, the middle dielectric layer 2 is made of Ecoflex silica gel, and the middle dielectric layer is in a shoe pad shape; the top electrode layer 3 is arranged on the upper surface of the middle dielectric layer 2 and forms a capacitor structure with the bottom electrode layer 1; the shielding layer 4 is arranged on the upper surface of the top electrode layer 3 and is of a conductive structure; an insulating layer is arranged between the top electrode layer 3 and the shielding layer 4, and the thickness of the insulating layer is smaller than 1 mm.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
According to the intelligent insole with the real-time monitoring function of the plantar pressure, when a person walks, the insole is pressed, so that the insole generates compression deformation, the capacitance of the insole is changed, and the pressure change acting on the insole is obtained by converting the capacitance into the pressure change.
The bottom electrode layer 1 can be patterned by selecting industrial conductive cloth with excellent flexibility and adopting a laser cutting technology. The bottom electrode layer 1 is a ground electrode for shielding ground interference.
The middle dielectric layer 2 is arranged on the upper surface of the bottom electrode 1 and is of a porous structure, the porous structure is perpendicular to the bottom electrode layer 1, the middle dielectric layer 2 is made of Ecoflex silica gel, and the Ecoflex silica gel has low Young modulus and comfortableness and is suitable for being used as a dielectric layer of a pressure sensor of a capacitor structure. The middle dielectric layer 2 may be composed of a plurality of cylinders, for example, 24 cylinders are adopted in the embodiment of the present disclosure, the 24 cylinders constitute a cylinder array, each cylinder is of a porous structure, and the plurality of holes are uniformly arranged in the cylinder and perpendicular to the bottom electrode layer 1. The middle dielectric layer 2 is in a shoe pad shape, a porous structure can be prepared in the middle dielectric layer 2 by adopting a laser cutting technology, the sensitivity of the capacitance sensor can be effectively improved by the porous structure, the integrally arrayed middle dielectric layer 1 can be prepared in a personalized mode by the technology, the arrayed number and positions can be adjusted, the preparation process is simple, the cost is low, personalized customization is easy, and the industrial utilization value is high.
As shown in fig. 2, fig. 2 schematically shows a structural diagram of an intermediate medium layer according to an embodiment of the present disclosure, the structural material of the cylinder is Ecoflex silica gel, the radius of the cylinder is 2.5mm, and the radius of each hole in the porous structure therein is 600 μm. The number of the holes on the cylinder is 7, and the holes are arranged on the cylinder in a hexagonal shape.
Fig. 3 schematically illustrates a rate of change of capacitance of a single capacitive sensor having a porous structure compared to a single capacitive sensor without a porous structure, in accordance with an embodiment of the disclosure. Compared with a capacitor without a vertical porous structure, the sensitivity of the capacitor sensor which is arranged in a hexagonal mode and has the aperture size of 600 microns is obviously improved on the scale of 0-200 kPa, and the linearity is better on the scale of 0-200 kPa.
And the top electrode layer 3 is arranged on the upper surface of the middle dielectric layer 2 and forms a capacitor structure with the bottom electrode layer 1. The top electrode layer 3 can be selected from industrial customized metal printing welding electrodes, and due to the welding holes, the wires can be welded on the top electrode layer to form a very stable connection mode, so that the stability of the insole is facilitated. The top electrode layer 3 is a circular plate array structure, and each circular plate corresponds to a cylinder. As shown in fig. 4, fig. 4 schematically illustrates a schematic structure of a circular plate according to an embodiment of the present disclosure. Corresponding to the figure, the radius of the circular plate is 2.5mm, the circular plate is a circular printing welding electrode, and the welding mode can improve the stability of the whole insole.
From the above, a capacitive sensor array can be formed. FIG. 5 schematically illustrates a functional schematic of a capacitive sensor array according to an embodiment of the disclosure. The disclosed embodiments are described with the example that the capacitive sensor array includes 24 capacitive sensors. The 24 capacitive sensors are divided into two parts, for example, 12 capacitive sensors are connected with a collecting interface (CIN X) of an AD7147 chip, and an AC shield pin of the AD7147 chip is connected with the shielding layer 4. The AD7147 chip is a programmable capacitance digital converter of American analog device company, has the resolution of fF level, is distributed with 12 capacitance sensor input ends, and on-chip automatic calibration logic can automatically compensate environmental change and adjust self-adaptive threshold. The working voltage is 2.6V to 3.3V, and the working current is low (the full power mode is less than 1 mA). The PIC16F1526 is a middle-grade MCU of American micro-core company, has 2 SPI synchronous serial interfaces, can connect 2 AD7147, 2 SCI asynchronous serial interfaces, can be used to host computer communication. And the data transmission adopts an SPI compatible synchronous serial interface. The data of the capacitive sensor is transmitted to the MCU through the SPI synchronous serial interface, the MCU carries out related processing such as 'background deduction' on 24 paths of capacitive sensor data transmitted by the two AD7147 chips, the data are combined into one frame of data, and then the frame of data is transmitted to the wireless serial port through the SCI asynchronous serial interface, so that the data are output in a radio wave mode.
The shielding layer 4 is made of industrial conductive cloth with good flexibility, and can be customized into an insole shape by adopting a laser cutting technology to cover the upper surface of the top electrode layer 3 to serve as the shielding layer. An insulating layer is arranged between the top electrode layer 3 and the shielding layer 4, and the thickness of the insulating layer is smaller than 1 mm.
The intelligent insole for monitoring the plantar pressure in real time further comprises a display terminal, and the display terminal can convert capacitance data into pressure data and visually display the capacitance data and the pressure data.
Another embodiment of the present disclosure, an intelligent insole for real-time monitoring of plantar pressure comprises a sensor module and a data acquisition and transmission module, wherein:
the sensor module comprises a capacitive sensor array, wherein a cylindrical dielectric layer with a porous structure is arranged between two polar plates of each capacitive sensor in the capacitive sensor array, a metal shielding layer is further arranged on one polar plate, the porous structure is perpendicular to the two polar plates, and the cylindrical dielectric layer is made of Ecoflex silica gel. The Ecoflex silica gel has low Young's modulus and comfort, and is suitable for being used as a dielectric layer of a pressure sensor with a capacitor structure. The cylinder array is constituteed to a plurality of cylinders, and each cylinder is porous structure, and is porous evenly to be located in the cylinder. The porous structure can be prepared in the cylinder by adopting a laser cutting technology, the sensitivity of the capacitance sensor can be effectively improved by the porous structure, the integrated arrayed middle dielectric layer can be prepared in a personalized manner by the technology, the arrayed number and position can be adjusted, the preparation process is simple, the cost is low, the personalized customization is easy, and the industrial utilization value is higher.
And the data acquisition and transmission module is a multi-channel data acquisition chip and a wireless transmitter. The data acquisition and transmission module takes two AD7147 chips as cores. The chip is a programmable capacitance digital converter of American analog device company, has the resolution of fF level, is distributed with 12 capacitance sensor input ends, and on-chip automatic calibration logic can automatically compensate environmental change and adjust self-adaptive threshold. The front 12 paths of capacitance data and the back 12 paths of capacitance data of the system are respectively connected with the acquisition interfaces of two AD7147, and the shielding layer is connected to an AC shield pin of the chip. And the data transmission adopts an SPI compatible synchronous serial interface. The working voltage is 2.6V to 3.3V, and the working current is low (the full power mode is less than 1 mA). The PIC16F1526 is a middle-grade MCU of American micro-core company, has 2 SPI synchronous serial interfaces, can connect 2 AD7147, 2 SCI asynchronous serial interfaces, can be used to host computer communication. The two AD7147 chips are respectively connected with 12 capacitance sensors, the data of the capacitance sensors are transmitted to the MCU through the SPI synchronous serial interface, the MCU carries out related processing such as 'background deduction' on the 24 paths of capacitance sensor data transmitted by the 2 AD7147 chips, the data are combined into one frame of data, then the frame of data is transmitted to the wireless serial port through the SCI asynchronous serial interface, and the frame of data is communicated with a display terminal such as a personal computer in a radio wave mode.
FIG. 6 schematically illustrates a response curve of a rate of change of capacitance of a capacitive sensor with gradual increase and decrease in applied stress for a single capacitive sensor of an embodiment of the disclosure. Wherein the external force is 4.5kPa, 16kPa, 35.7kPa, 56kPa, 94kPa, 128kPa, 158kPa, 200kPa, 236kPa, respectively.
FIG. 7 schematically illustrates a plot of the recovery of the rate of change of capacitance of a capacitive sensor with a gradual increase and decrease in applied stress for a single capacitive sensor corresponding to FIG. 6 in an embodiment of the disclosure. It can be seen that the capacitive sensor has good recovery.
FIG. 8 schematically illustrates the response time of a capacitive sensor with a single capacitive sensor applying and removing stress according to an embodiment of the disclosure. The response time is very short, and the response is quick and sensitive.
FIG. 9 schematically shows 15000 cycles of relative capacitance change at a pressure of 50kPa in accordance with an embodiment of the disclosure. The graphs are curves of the relative change rate of the capacitance of 50-70 times and 14420-14440 times, and it can be seen that the sensor has better stability.
Fig. 10 schematically shows a dynamic real-time simulation of the pressure distribution of the sole of a foot during walking of a person wearing the intelligent insole with real-time monitoring of the pressure on the sole of the foot according to an embodiment of the disclosure.
In summary, the present disclosure adopts the laser cutting technology to obtain the porous structure of the middle dielectric layer to improve the sensitivity of the sensor, and adopts the technology to prepare the intelligent insole for real-time monitoring of the plantar pressure, which is used for real-time simulation and sensing of the dynamic pressure of the foot. Has the advantages of low cost, large-scale preparation, customized customization and the like; and adopt wireless transmission and receiving module, characteristics such as realization wearable and wireless transmission.
It should also be noted that directional terms, such as "upper", "lower", "front", "rear", "left", "right", etc., mentioned in the embodiments are only directions referring to the drawings, and are not intended to limit the scope of the present disclosure. Throughout the drawings, like elements are represented by like or similar reference numerals. Conventional structures or constructions will be omitted when they may obscure the understanding of the present disclosure. And the shapes, sizes and positional relationships of the components in the drawings do not reflect the actual sizes, proportions and actual positional relationships.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The utility model provides a plantar pressure real-time supervision's intelligent shoe-pad which characterized in that, from supreme including in proper order down:
a bottom electrode layer (1), said bottom electrode layer (1) being grounded;
the middle dielectric layer (2) is arranged on the upper surface of the bottom electrode layer (1) and is of a porous structure, the porous structure is a through hole and is perpendicular to the bottom electrode layer (1), the middle dielectric layer (2) is made of Ecoflex silica gel, and the middle dielectric layer is in a shoe pad shape;
the top electrode layer (3) is arranged on the upper surface of the middle dielectric layer (2) and forms a capacitor structure with the bottom electrode layer (1);
the shielding layer (4) is arranged on the upper surface of the top electrode layer (3) and is of a conductive structure;
an insulating layer is arranged between the top electrode layer (3) and the shielding layer (4), and the thickness of the insulating layer is smaller than 1 mm.
2. The smart insole according to claim 1, wherein said intermediate medium layer (2) comprises an array of 24 cylinders, each of said cylinders being of a porous structure.
3. The intelligent insole according to claim 2, wherein said porous structure is uniformly provided on said cylindrical body.
4. The intelligent insole according to claim 2 or 3, wherein the radius of said cylinder is 2.5mm and the radius of each hole in said porous structure is 600 μm.
5. The intelligent insole according to claim 2, wherein the number of holes on each cylinder is 7, and the holes are arranged in a hexagonal pattern on the cylinder.
6. The smart insole according to claim 2, wherein the top electrode layer (3) is an array of circular plates, each circular plate corresponding to one of the cylinders.
7. The intelligent insole according to claim 6, wherein the circular plate array and the bottom electrode layer (1) form a capacitor array, the capacitor array is divided into two parts and is respectively connected with a collecting interface of an AD7147 chip, and an AC shield pin of the AD7147 chip is connected with the shielding layer (4).
8. The intelligent insole according to claim 7, wherein the AD7147 chip combines the collected capacitance data into a frame of data, the AD7147 chip further comprises an SCI asynchronous serial interface and a wireless serial port, and the AD7147 chip transmits the combined data to the wireless serial port through the SCI asynchronous serial interface so that the data is output in a radio wave manner.
9. The intelligent insole according to claim 8, further comprising a display terminal for converting said capacitance data into pressure data and visually displaying said capacitance data and pressure data.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020570190.1U CN212971922U (en) | 2020-04-16 | 2020-04-16 | Intelligent insole capable of monitoring plantar pressure in real time |
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| CN202020570190.1U CN212971922U (en) | 2020-04-16 | 2020-04-16 | Intelligent insole capable of monitoring plantar pressure in real time |
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| CN212971922U true CN212971922U (en) | 2021-04-16 |
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| CN202020570190.1U Active CN212971922U (en) | 2020-04-16 | 2020-04-16 | Intelligent insole capable of monitoring plantar pressure in real time |
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