CN214632153U - Gait monitoring system based on flexible pressure sensor of graphite alkene - Google Patents
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- CN214632153U CN214632153U CN202022858999.7U CN202022858999U CN214632153U CN 214632153 U CN214632153 U CN 214632153U CN 202022858999 U CN202022858999 U CN 202022858999U CN 214632153 U CN214632153 U CN 214632153U
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Abstract
The utility model belongs to the technical field of novel medical treatment biological monitoring, especially, relate to a gait monitoring system based on flexible pressure sensor of graphite alkene. The gait monitoring system comprises an insole, a data acquisition module, an inertia measurement module, a data processing module, a wireless communication module, a mobile phone terminal, a server and a central processing unit. The flexible pressure sensor of graphite alkene among this gait monitoring system adopts flexible packaging technology, and its compliance, laminating degree, comfort level and measurement accuracy are higher than silica-based and film pressure sensor greatly. The graphene sensing layer is generated by adopting a laser direct writing technology, so that the device characteristics can be highly customized, and the characteristics of the device, such as sensitivity, measurement range and the like, can be effectively changed by changing the internal structure or the packaging material of the graphene sensing layer. The utility model discloses a server end manages synchronous gait data, and the mode of the long-range download analytic data of computer end, the popularization and the application of the wisdom medical treatment and the gait detection technique of being convenient for.
Description
Technical Field
The utility model belongs to the technical field of novel medical treatment biological monitoring, especially, relate to a gait monitoring system based on flexible pressure sensor of graphite alkene.
Background
Gait refers to the motion and posture of a person as they walk. Since a person exhibits a gait closely related to his skeleton, muscles and nervous system, gait can be an important indicator for the detection of a person's health status and even systemic neurological diseases such as parkinson, huntington, etc. Conventional gait (plantar pressure) monitoring insoles or systems, such as the chinese patent with application number 201210580700.3 entitled "plantar pressure distribution measurement system," use pressure sensors that are silicon-based or thin-film, which are far less shaped, flexible, conformable, and device characteristics such as sensitivity and dynamic range than graphene-based flexible pressure sensors. And the traditional gait monitoring system does not integrate rich human-computer interaction interfaces and user information management systems, which is not beneficial to the application and popularization of gait detection.
Disclosure of Invention
The utility model aims at providing a gait monitoring system based on flexible pressure sensor of graphite alkene contrasts traditional gait monitoring system, because integrated novel flexible pressure sensor of graphite alkene, its compliance, laminating degree, comfort level and measurement accuracy all obtain great improvement to satisfy the demand of gait monitoring better.
The utility model provides a gait monitoring system based on flexible pressure sensor of graphite alkene, including shoe-pad, data acquisition module, inertia measurement module, data processing module, wireless communication module, cell-phone end, server and central processing unit, wherein:
the insole is arranged on the sole and used for monitoring the pressure of the sole;
the inertia measurement module is used for measuring the acceleration and the angular velocity of the feet during the movement;
the data acquisition module is used for converting the pressure change obtained by monitoring the insole into an analog electric signal, amplifying and filtering the analog electric signal, and is connected with the electrode of the graphene flexible pressure sensor through a flexible circuit layer and a lead in the insole;
the data processing module is used for sampling the multi-channel analog electric signals of the data acquisition module, converting the analog electric signals into digital signals, and finally packaging and sending pressure signals of each area of the sole and signals from the inertia measurement module to the wireless communication module;
the wireless communication module is used for uploading the packed data to the mobile phone terminal;
the mobile phone end is used for synchronizing the data to the server end after completing the test for one time;
the central processing unit is used for downloading the gait data in the server to the local and carrying out gait analysis;
the data acquisition module, the inertia measurement module, the data processing module and the wireless communication module are connected through signal lines and are placed on the shoe as a wearable part.
In the gait monitoring system, the insole consists of a substrate layer, a flexible circuit layer and a graphene flexible pressure sensor from top to bottom in sequence, wherein the substrate layer plays a supporting role in the whole insole and protects the lower layer; the flexible circuit layer play the effect of connecting and fixing the flexible pressure sensor of graphite alkene, be provided with the relevant position of the flexible pressure sensor of graphite alkene on the flexible circuit layer, wherein A, B, C, D, E, F, G, H corresponds to thumb, first toe, third toe, fifth toe, inboard cuneiform bone, fifth phalanx tuberosity, heel front side and heel rear side of foot respectively.
The graphene flexible pressure sensor of the gait monitoring system consists of an upper packaging layer, a middle layer and a lower packaging layer from top to bottom in sequence, wherein the upper packaging layer and the lower packaging layer form a substrate to protect the middle layer; the intermediate level include oxidation graphite alkene layer, electrode and wire, when pressure was applyed at shoe-pad upper and lower encapsulated layer, go up the encapsulated layer and can be flattened and take place deformation with encapsulated layer down, graphite alkene layer takes place corresponding deformation and changes its resistance characteristic, corresponding change can take place from the resistance of electrode both ends measurement to form a piezoresistive pressure sensor, resistance changes along with pressure promptly.
In the graphene flexible pressure sensor of the gait monitoring system, the graphene layer is generated by reduction from the graphene oxide layer through laser direct writing, and the graphene layer is circular or square. The graphene layer may be a grid or mesh structure.
The utility model provides a based on flexible pressure sensor gait monitoring system of graphite alkene, its advantage:
1. the utility model discloses the flexible pressure sensor of graphite alkene that uses adopts flexible packaging technology, and its compliance, laminating degree, comfort level and measurement accuracy are higher than silica-based and film pressure sensor greatly. In addition, the graphene sensing layer is generated by adopting a laser direct writing technology, so that the device characteristics can be highly customized, and the characteristics of the device, such as sensitivity and measurement range, can be effectively changed by changing the internal structure or the packaging material, such as changing the spacing and the direction of laser scanning so as to change the internal structure (such as a grid structure or a grid structure). In addition, the characteristics of the device, such as sensitivity, measurement range and the like, can be effectively changed by changing the packaging material of the device.
2. The utility model discloses a mode that gait data and dynamic response were given to the user is received in real time to cell-phone end software for its current gait of understanding that the user can be fine helps carrying out real-time adjustment and correction to its gait.
3. The utility model discloses a server end manages synchronous gait data, and the mode of computer end long-range download analytic data has avoided the user to go the hospital and has taken limited medical resource, helps the doctor to carry out remote diagnosis, the popularization and the application of the wisdom medical treatment and the gait detection technique of being convenient for.
Drawings
Fig. 1 is the utility model provides a structural block diagram based on flexible pressure sensor gait monitoring system of graphite alkene.
Fig. 2 is a schematic structural diagram of an insole in the graphene-based flexible pressure sensor gait monitoring system shown in fig. 1.
Figure 3 is a top view of the flexible circuit layer in the insole shown in figure 2.
Fig. 4 is a schematic structural diagram of a graphene flexible pressure sensor.
FIG. 5 is a schematic diagram of the internal structure of multilayer graphene generated by laser reduction in an insole of a graphene flexible gait pressure monitoring system, wherein (a) is a grid structure and (b) is a mesh structure
Fig. 6 is a gait information acquisition interface of the mobile phone terminal program.
Fig. 7 is a gait information analysis interface of the computer program.
In fig. 1 to 7, 1 is a graphene oxide layer, 2 is a graphene layer, 3 is an electrode, 4 is a wire, 5 is an upper package layer, 6 is a lower package layer, 7 is an insole, 8 is a data acquisition module, 9 is an inertia measurement module, 10 is a data processing module, 11 is a wireless communication module, 12 is a mobile phone terminal, 13 is a server, 14 is a central processing unit, 15 is a flexible graphene pressure sensor, 16 is a flexible circuit layer, 17 is a substrate layer, 18 is a mobile phone terminal control area, 19 is a mobile phone terminal pressure monitoring area, 20 is a mobile phone terminal foot attitude area, and 21 is a mobile phone terminal inertia measurement module data display area.
Detailed Description
The utility model provides a gait monitoring system based on flexible pressure sensor of graphite alkene, its structure block diagram is shown in fig. 1, including shoe-pad 7, data acquisition module 8, inertia measurement module 9, data processing module 10, wireless communication module 11, cell-phone end 12, server 13 and central processing unit 14, wherein:
the insole 7 is arranged on the sole and used for monitoring the pressure of the sole;
the inertia measurement module 9 is used for measuring the acceleration and the angular velocity when the foot moves;
the data acquisition module 8 is used for converting the pressure change obtained by monitoring the insole 7 into an analog electric signal, amplifying and filtering the analog electric signal, and the data acquisition module 8 is connected with the electrode 3 of the graphene flexible pressure sensor through a flexible circuit layer 16 and a lead 4 in the insole 7;
the data processing module 10 is used for sampling the multiple paths of analog electric signals of the data acquisition module 8, converting the analog electric signals into digital signals, and finally packaging and sending pressure signals of each area of the sole and signals from the inertia measurement module 9 to the wireless communication module;
the wireless communication module 11 is used for uploading the packed data to the mobile phone end 12;
the mobile phone end 12 is used for synchronizing data to the server end 13 after completing a test;
the central processing unit 14 is used for downloading the gait data in the server to the local and carrying out gait analysis;
the data acquisition module 8, the inertia measurement module 9, the data processing module 10 and the wireless communication module 11 are connected through signal lines and are arranged on the shoe as a wearable part, such as fixed on the outer side of the upper.
The insole 7 in the gait monitoring system is structurally shown in fig. 2 and sequentially comprises a substrate layer 17, a flexible circuit layer 16 and a graphene flexible pressure sensor 15 from top to bottom, wherein the substrate layer 17 supports the whole insole and protects the lower layer; the physical properties of the entire insole (strength, hardness, flexibility, etc.) are determined by the substrate layer 17. The flexible circuit layer 16 plays a role in connecting and fixing the graphene flexible pressure sensor 15, and the corresponding positions of the graphene flexible pressure sensor 15 are arranged on the flexible circuit layer 16, as shown in fig. 3, wherein A, B, C, D, E, F, G, H respectively correspond to the thumb, the first toe, the third toe, the fifth toe, the medial cuneiform bone, the fifth phalanx tuberosity, the front heel side and the rear heel side of the foot.
The structure of the graphene flexible pressure sensor 15 in the gait monitoring system is shown in fig. 4, and the graphene flexible pressure sensor is composed of an upper packaging layer 5, a middle layer and a lower packaging layer 6 from top to bottom in sequence, wherein the upper packaging layer 5 and the lower packaging layer 6 form a substrate to protect the middle layer; the physical properties (strength, hardness, degree of expansion, etc.) of the entire sensor are determined by the upper and lower encapsulation layers 5, 6. The intermediate level include oxidation graphite alkene layer 1, graphite alkene layer 2, electrode 3 and wire 4, when pressure was applyed encapsulation layer about the shoe-pad, go up encapsulation layer 5 and encapsulation layer 6 can be flattened and take place deformation (horizontal stretching) down, thereby graphite alkene layer 2 can take place corresponding deformation and change its resistance characteristic this moment, thereby the resistance that measures from electrode 3 both ends can take place corresponding change and form the pressure sensor of a piezoresistive, resistance is along with pressure change promptly. The graphene oxide layer 1 of the insole 1 has two functions: firstly, the graphene layer 2 is used as a raw material of the graphene layer 2, namely, the graphene layer 2 is generated by reduction of the graphene oxide layer 2 through a laser direct writing technology; secondly, as an insulating layer, the graphene oxide is used for isolating the interference between the graphene layer 2 in the middle and the outside (the flexible circuit layer 16) by utilizing the non-conducting property of the graphene oxide, so that the graphene oxide is not conducting; the graphene flexible pressure sensor further comprises a lead 4 connected with the flexible circuit layer 16 through soldering tin, and the resistance change between the electrodes 3 is transmitted to the flexible circuit board and finally transmitted to the data acquisition module.
In the graphene flexible pressure sensor of the gait monitoring system, the graphene layer 2 is generated by reducing the graphene oxide layer 1 through laser direct writing, and the graphene layer 2 is circular or square. The graphene layer 2 can also change the internal structure of the graphene layer 2 into a grid or mesh structure by changing the distance and direction of laser direct writing. As shown in fig. 5, (a) is a grid structure, and (b) is a grid structure, so that the resistance change characteristic of the graphene layer 2 along with deformation is changed, and finally, the sensitivity and the measuring range of the insole in pressure measurement are changed.
The utility model provides a based on flexible pressure sensor gait monitoring system of graphite alkene, data acquisition module 8 links to each other through flexible circuit layer 16 and wire 4 and the flexible pressure sensor's of graphite alkene electrode 3, and data acquisition module 8 converts the pressure variation that the monitoring obtained to the signal of telecommunication to enlarge and filter the signal of telecommunication. The data processing module 10 samples the multiple paths of analog electric signals, converts the analog electric signals into digital signals, and finally packs and sends pressure signals of each area of the sole and signals from the inertia measuring module 9 to the wireless communication module. The wireless communication module 11 uploads the packaged data to the mobile phone end software 12; after completing the test for one time, the mobile phone end software synchronizes the data to the server end software 13; the computer software 14 downloads the gait data in the server to the local and performs gait analysis. The data acquisition module 8, the inertia measurement module 9, the data processing module 10 and the wireless communication module 11 are connected through signal lines and are placed on the outer side of the shoe as a wearable part.
An embodiment of the present invention is described below with reference to the accompanying drawings:
the utility model discloses a gait monitoring system, the preparation process of the flexible pressure sensor of graphite alkene wherein is as follows:
1. pouring a Graphene Oxide (GO) solution containing 16.67% Tetrahydrofuran (THF) on a flexible substrate (such as Eco-flex), drying and evaporating to generate a graphene oxide film;
2. reducing graphene oxide by using a laser direct writing technology to generate a multilayer graphene pattern;
3. the electrode 3 is produced by silver colloid and is connected with the lead 4;
4. packaging the upper layer by using the flexible substrate;
5. individual sensors are generated by dicing.
The principle of the prepared graphene flexible pressure sensor is that a laser direct writing technology is used for reducing graphene oxide to generate a multi-layer graphene pattern, electrodes generated by an upper layer flexible substrate, a lower layer flexible substrate and silver colloid are used for forming the pressure sensor, and when pressure acts on the sensor, flexible materials can deform (such as stretch) to drive graphene layers to deform, so that resistance is changed to form the piezoresistive sensor. The sensor has the advantages that the sensor can be highly customized, firstly, the characteristics of the device can be highly customized, the characteristics of the device such as sensitivity, measurement range and the like can be effectively changed by changing the internal structure (such as a grid or a grid structure) of the sensor, for example, the internal structure is changed in fig. 4, and in addition, the characteristics of the device (deformation amount caused by different material pressures is different) can also be effectively changed by changing the material of the flexible substrate. Secondly, its physical properties are also highly customizable, and by varying the material of the flexible substrate, its thickness and degree of compliance of softness are also highly customizable.
The flexible circuit layer 16 is a printed circuit board with high reliability made of polyimide or polyester film, and the wires 4 on the sensor are connected with the bonding pads of the flexible circuit layer through soldering tin. The interface on the flexible circuit layer is connected with the data acquisition module through soldering tin and an external lead. Substrate layer 17 may be a sponge or foam that is affixed to flexible circuit layer 16 by adhesive. The data acquisition module converts resistance changes at two ends of electrodes in the insole into voltage signals by using the voltage division circuit, amplifies and filters the voltage signals, and transmits the processed signals to the data processing circuit. The data processing circuit synchronously samples the multi-path voltage signals at a sampling frequency of 100Hz, and packs and sends the data of the inertia measurement module to the wireless communication module. And the wireless communication module transmits the data to the mobile phone end software in real time.
The data acquisition interface of the mobile phone software is shown in fig. 6, and includes a control area 18 for controlling connection, start, calibration, and stop of the lower computer, and includes a current pressure display area 19, a foot posture display 20, and an inertial sensor data area 21. The user can know the current gait in real time and make corresponding correction conveniently. The software of the mobile phone end 12 can upload the test data to the software of the server 13 and keep the data synchronization with the software of the server 13. The software of the central processor 14 can download the gait data from the server 13 and analyze the gait data to generate a report. The data analysis interface of the computer software is shown in fig. 7.
In one embodiment of the present invention, the data acquisition module 8 is made of LM324, a product model of texas instruments; the inertia measurement module 9 is composed of LPMS-ME1 manufactured by Alobi electronic technology Co., Ltd;
the data processing module 10 and the BT5 module integrated with the CC260r2f of texas instruments, produced by the three-tower electronic trade, ltd, Shenzhen, are the wireless communication module 11.
Claims (5)
1. The utility model provides a gait monitoring system based on flexible pressure sensor of graphite alkene which characterized in that, this gait monitoring system includes shoe-pad, data acquisition module, inertia measurement module, data processing module, wireless communication module, cell-phone end, server and central processing unit, wherein:
the insole is arranged on the sole and used for monitoring the pressure of the sole;
the inertia measurement module is used for measuring the acceleration and the angular velocity of the feet during the movement;
the data acquisition module is used for converting the pressure change obtained by monitoring the insole into an analog electric signal, amplifying and filtering the analog electric signal, and is connected with the electrode of the graphene flexible pressure sensor through a flexible circuit layer and a lead in the insole;
the data processing module is used for sampling the multi-channel analog electric signals of the data acquisition module, converting the analog electric signals into digital signals, and finally packaging and sending pressure signals of each area of the sole and signals from the inertia measurement module to the wireless communication module;
the wireless communication module is used for uploading the packed data to the mobile phone terminal;
the mobile phone end is used for synchronizing the data to the server end after completing the test for one time;
the central processing unit is used for downloading the gait data in the server to the local and carrying out gait analysis;
the data acquisition module, the inertia measurement module, the data processing module and the wireless communication module are connected through signal lines and are placed on the shoe as a wearable part.
2. The gait monitoring system of claim 1, wherein the insole is comprised of, in order from top to bottom, a substrate layer, a flexible circuit layer, and a graphene flexible pressure sensor, the substrate layer supporting the entire insole and protecting the underlying layers; the flexible circuit layer play the effect of connecting and fixing the flexible pressure sensor of graphite alkene, be provided with the relevant position of the flexible pressure sensor of graphite alkene on the flexible circuit layer, wherein A, B, C, D, E, F, G, H corresponds to thumb, first toe, third toe, fifth toe, inboard cuneiform bone, fifth phalanx tuberosity, heel front side and heel rear side of foot respectively.
3. The gait monitoring system of claim 2, wherein the graphene flexible pressure sensor is composed of an upper encapsulating layer, a middle layer and a lower encapsulating layer from top to bottom in sequence, the upper encapsulating layer and the lower encapsulating layer form a substrate to protect the middle layer; the intermediate level include oxidation graphite alkene layer, electrode and wire, when pressure was applyed at shoe-pad upper and lower encapsulated layer, go up the encapsulated layer and can be flattened and take place deformation with encapsulated layer down, graphite alkene layer takes place corresponding deformation and changes its resistance characteristic, corresponding change can take place from the resistance of electrode both ends measurement to form a piezoresistive pressure sensor, resistance changes along with pressure promptly.
4. The gait monitoring system of claim 3, wherein the graphene flexible pressure sensor is formed by laser direct writing reduction from a graphene oxide layer, the graphene layer being circular or square in shape.
5. A gait monitoring system as claimed in claim 3, wherein the graphene layer is of a grid or mesh structure.
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