Wearable system and method for collecting surface electromyogram signals and production method

Abstract

The invention belongs to the technical field of bioelectricity signal acquisition, and discloses a wearable system and method for surface electromyogram signal acquisition and a production method. The wearable system for surface electromyographic signal acquisition comprises a shoe, an electromyographic signal acquisition system is installed on the shoe, the electromyographic signal acquisition system is connected with an elastic metal sock, and the elastic metal sock is located at the top of the shoe; the external electromagnetic interference influence can be greatly reduced, the stability and sampling quality of the electromyographic signals are improved, data can be automatically collected through the electromyographic signal collecting system, the operation process is simple and clear, the wearing experience is good, the normal dressing, movement, training or competition state of a wearer is not influenced, and the working efficiency is improved. And the sampling precision and the system stability are not influenced by the outside, so that a large-amplitude action scene can be met, and convenience is provided for daily training, clinical rehabilitation or large-scale human body signal monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of bioelectric signal acquisition, and in particular to a wearable system and method for acquiring surface electromyography signals, and a production method. Background Art

[0002] Surface electromyography (sEMG) signal acquisition is widely used in the fields of human motion analysis, rehabilitation assessment, and human-machine interface. Traditional electromyography acquisition systems usually use Ag / AgCl patch electrodes and wires to connect sampling equipment. This type of structure has problems such as severe motion artifacts, inconvenience in wearing, and poor stability, which are particularly obvious in dynamic motion scenes (such as dancing and training).

[0003] In addition, the prior art often uses a single-point reference electrode without a unified shielding structure, which is susceptible to external electromagnetic interference, affecting the sampling accuracy and system stability; the existing electromyography testing method requires an electrode to collect the electromyography signal of the target cluster, and the other electrode as the ground potential, which is attached to other non-moving positions as a reference potential, and the actual signal is obtained by comparing the difference in electrical signals between the two electrodes. However, the electrode used as the ground potential reference signal is not completely free of electromyography signals. Especially when the whole body is exercising, the position of the reference electrode may also be affected by muscle activity, thereby generating certain electrical signals, which will interfere with the collection and analysis of electromyography signals and affect the accuracy of the test results; in large-scale whole-body exercises, such as dance training, running and jumping movements, traditional electromyography acquisition equipment is mostly external structure, with cumbersome wiring and inconsistent reference ground settings. It is susceptible to interference in high-intensity exercise, which not only affects the performance of the movement, but also reduces the signal quality and reference stability, and is difficult to meet large-scale movement scenes. Summary of the invention

[0004] The purpose of the present invention is to provide a wearable system, method and production method for surface electromyographic signal acquisition to overcome the problems existing in the prior art. The present invention can greatly reduce the influence of external electromagnetic interference, improve the stability and sampling quality of electromyographic signals, and when in use, only the electrodes need to be attached to the target muscle group, the elastic metal socks need to be worn and the electromyographic signal transmission line needs to be connected to automatically collect data. The operation process is concise and clear, the wearing experience is good, and the wearer's normal dressing, exercise, training or competition state is not affected. The sampling accuracy and system stability are not affected by external factors, and can meet large-scale action scenes, providing convenience for daily training, clinical rehabilitation or large-scale human signal monitoring. The overall structure of the present invention is small and light, no additional carrying equipment is required, and the clothing structure is not affected. It has good compatibility with existing sports shoes, can be widely promoted and applied to sports rehabilitation, competitive training, functional evaluation, posture recognition and other fields, and also has a certain degree of aesthetics and concealment, which is suitable for ordinary users to wear and use naturally in daily life.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a wearable system for surface electromyogram signal acquisition, including a shoe, on which an electromyogram signal acquisition system is installed. The electromyogram signal acquisition system is connected to an elastic metal sock, and the elastic metal sock is located at the top of the shoe; The electromyogram signal acquisition system includes a component platform arranged at the heel of the shoe. A circuit board is attached to the component platform, and a plurality of wiring terminals and a ground terminal are installed on the circuit board. The wiring terminals are connected to sampling electrodes through electromyogram signal transmission lines, and the sampling electrodes are attached to the skin surface of the target muscle area of the user's calf; The elastic metal sock covers the sampling electrodes and the electromyogram signal transmission lines on the skin surface of the user's calf. Conductive points are arranged on the elastic metal sock, and the elastic metal sock is connected to the ground terminal through the conductive points in cooperation with the metal sock ground wire; Further, a battery module, an electromyogram signal conditioning circuit module, an analog-to-digital conversion module, and a Bluetooth communication module are integrally installed on the circuit board; The battery module is respectively connected to the electromyogram signal conditioning circuit module, the analog-to-digital conversion module, and the Bluetooth communication module, and the electromyogram signal conditioning circuit module is sequentially connected to the analog-to-digital conversion module and the Bluetooth communication module; Further, a polytetrafluoroethylene insulating coating is arranged on one side of the sampling electrode attached to the skin surface of the target muscle area of the user's calf for realizing electrical isolation between the sampling electrode and the elastic metal sock.

[0006] In a second aspect, the present invention provides a method for surface electromyogram signal acquisition, based on the above-mentioned wearable system for surface electromyogram signal acquisition, including the following steps: Step 1, the user puts on the shoe to fix the circuit board in place with the foot; Step 2, apply medical conductive gel to the skin surface of the user's target muscle area, and then paste the sampling electrode on the skin surface of the user's target muscle area; Step 3, lay the electromyogram signal transmission line along the user's calf, and then wear the elastic metal sock covering the sampling electrode and the electromyogram signal transmission line on the calf part of the user's target muscle area; Step 4, the user performs dynamic exercise, and during the exercise, the electromyogram signals of the user's target muscle area are continuously collected through the sampling electrode, and the collected electromyogram signals are transmitted to the circuit board through the electromyogram signal transmission line; Step 5, the collected electromyogram signals are transmitted to the host computer terminal device in real time through the circuit board; Further, the step of laying the electromyogram signal transmission line along the user's calf, and then wearing the elastic metal sock covering the sampling electrode and the electromyogram signal transmission line on the calf part of the user's target muscle area specifically includes: Lay the electromyogram signal transmission line along the user's calf, connect one end of the electromyogram signal transmission line to the sampling electrode and the other end to the terminal block, and wear the elastic metal sock on the calf part of the user's target muscle area, so that the elastic metal sock wraps and fixes the sampling electrode and the electromyogram signal transmission line as a whole and maintains stable contact; Further, a battery module, an electromyogram signal conditioning circuit module, an analog-to-digital conversion module, and a Bluetooth communication module are integrally installed on the circuit board; the battery module is respectively connected to the electromyogram signal conditioning circuit module, the analog-to-digital conversion module, and the Bluetooth communication module, and the electromyogram signal conditioning circuit module is sequentially connected to the analog-to-digital conversion module and the Bluetooth communication module; The collected electromyogram signal is transmitted to the circuit board through the electromyogram signal transmission line, specifically including: The collected electromyogram signal is transmitted to the electromyogram signal conditioning circuit through the electromyogram signal transmission line for amplification and filtering, and then transmitted to the analog-to-digital conversion module for analog-to-digital conversion and encoding; Further, the circuit board transmits the collected electromyogram signal to the host computer terminal device in real time, specifically including: The electromyogram signal after analog-to-digital conversion and encoding is transmitted to the host computer terminal device in real time through the Bluetooth communication module.

[0007] In a third aspect, the present invention provides a production method for a wearable system for surface electromyogram signal acquisition. Based on the above-mentioned wearable system for lower limb surface electromyogram signal acquisition, it includes the following steps: Step 1, use an injection mold or a digital control processing technology to reserve a component platform area on the outer side of the shoe heel as the installation plane of the electromyogram signal acquisition circuit board; Step 2, install the circuit board on the component platform, install several terminal blocks and a ground terminal on the circuit board, and then drill holes and tap threads at the terminal blocks and the ground terminal; Step 3, perform sandblasting on the side of the sampling electrode attached to the skin surface of the user's target muscle area to enhance the coating adhesion, then spray a polytetrafluoroethylene insulating coating, and then perform thermal curing; Step 4, use a circular knitting technology to compound and weave conductive metal fibers and elastic yarns to form an elastic metal sock; Step 5, connect one end of the electromyogram signal transmission line to the sampling electrode, connect the other end to the terminal block with a screw, and then connect the elastic metal sock to the ground terminal with a metal sock ground wire and a screw; Further, the conductive metal fiber includes silver-plated nylon or stainless steel yarn; Further, the installation of the circuit board on the component platform specifically includes: Paste the circuit board on the component platform with electronic glue.

[0008] The above technical solution has the following advantages or beneficial effects: In the first aspect, the present invention provides a wearable system for surface electromyogram signal acquisition, innovatively designing the elastic metal sock as a trinity of an electrode fixing carrier, a system reference ground, and a flexible electromagnetic shielding layer. While the sampling electrode is attached to the skin surface, the sock structure is used to wrap the electrode and the signal wire as a whole, effectively realizing the stable fixation of the wire and the anti-disturbance fixation of the electrode position. It not only eliminates the signal distortion and drift phenomena caused by the loosening of the sampling electrode and the swaying of the wire during movement, but also forms a shielding layer through the metal sock woven with flexible conductive fibers, greatly reducing the influence of external electromagnetic interference and improving the stability and sampling quality of the electromyogram signal; the elastic metal sock of the present invention has three functions. First, it can effectively form an electrical connection with the ground or the grounding system, thus serving as the ground potential. In occasions where grounding protection or electrostatic protection is required, it can ensure the safety of the wearer and prevent the occurrence of electrostatic accumulation or electric shock accidents. Second, the elastic metal sock can form an effective electromagnetic shielding layer by utilizing the conductivity of its metal layer to reduce the interference of external electromagnetic fields on the signal transmission line. In addition, in occasions where electrodes or transmission lines need to be worn, such as medical monitoring, sports physiology research, etc., the fixation of electrodes and transmission lines is a key issue. The elastic metal sock can tightly wrap around the wearer's leg or foot through its elasticity and conformability, providing a stable and comfortable fixation environment for the electrodes and transmission lines, and ensuring that the electrodes and transmission lines will not loosen or shift during movement, thus not affecting the accurate acquisition and transmission of data; when the present invention is used, only need to attach the electrode to the target muscle group, wear the elastic metal sock and connect the electromyogram signal transmission line, then data can be automatically collected. The operation process is simple and clear, and the wearing experience is good, without affecting the normal dressing, movement, training or competition state of the wearer, providing convenience for daily training, clinical rehabilitation or large-scale human signal monitoring; the overall structure of the present invention is small and light, without the need to carry additional equipment, does not affect the clothing structure, has good compatibility with existing sports shoes, and can be widely promoted and applied in multiple fields such as sports rehabilitation, competitive training, function evaluation, and posture recognition. It also has a certain degree of aesthetics and concealment, suitable for ordinary users to wear naturally in daily life; through structural integration optimization, material design upgrade and acquisition method innovation, the present invention significantly improves the practicability, comfort and reliability of the surface electromyogram signal acquisition system in high-dynamic scenarios, and is an innovative solution for future wearable human signal perception systems, with extremely high engineering practical value and broad industrialization prospects.

[0009] Furthermore, by highly integrating the battery, conditioning and amplification module, analog-to-digital conversion module, and Bluetooth communication module required for EMG signal acquisition into the circuit board on the outer side of the rear of the sports shoes, the layout is reasonable and aesthetic, avoiding interference with the wearer's movements; the EMG signal acquisition system operates in a floating ground mode and is powered by the battery integrated in the circuit board without external wiring, improving safety and portability. The multi-channel EMG signals collected are sent to the host computer or mobile device in real time through Bluetooth communication, supporting various applications such as motion monitoring, rehabilitation evaluation, and sports feedback. At the same time, when the system is working, the battery is completely isolated from the external power supply, avoiding the user from suffering from common-mode interference or leakage risks, further enhancing the wearing safety, and is particularly suitable for long-term motion monitoring in complex environments.

[0010] Furthermore, the back of the sampling electrode is treated with sandblasting to improve adhesion, and a polytetrafluoroethylene (PTFE) insulating coating is sprayed and cured. The PTFE material has excellent biocompatibility, electrical insulation, and corrosion resistance, ensuring that the sampling electrode remains reliably insulated from the metal sock in dynamic environments such as long-term wearing and heavy sweating, avoiding problems such as signal short circuit or common potential drift, and improving the safety and reliability of the system.

[0011] In a second aspect, the present invention provides a method for surface electromyogram (EMG) signal acquisition. By attaching sampling electrodes, wearing an elastic metal sock, and activating the circuit board in the shoe heel, high-precision, multi-channel real-time EMG signal acquisition and wireless transmission during movement are achieved. First, the user attaches the sampling electrodes to the target muscle area, such as the anterior part of the calf, gastrocnemius muscle, or tibialis anterior muscle. Before attachment, a medical conductive gel is applied between the sampling electrodes and the skin to enhance electrical contact performance, reduce skin-electrode impedance, and improve signal sampling quality. Then, the user wears the elastic metal sock, whose structure covers the entire calf area and encloses the electrodes and transmission lines together, which not only plays a fixing role but also provides a stable reference potential and electromagnetic interference shielding. The elastic metal sock is connected to the EMG signal acquisition system through a dedicated grounding wire to ensure that the entire system operates under a unified reference potential, improving the anti-interference ability and measurement stability of the system. Subsequently, the user performs dynamic movement. During the movement, the sampling electrodes continuously acquire the EMG signals of the user's target muscle area. The acquired EMG signals are transmitted through the EMG signal transmission line to the circuit board, and the circuit board transmits the acquired EMG signals to the host computer terminal device in real time. The host computer can receive and display the EMG signal waveforms in real time through an application program, analyze the muscle activation degree, time series, and spectral characteristics of the user under different actions, and assist in judging key indicators such as movement coordination, muscle fatigue, and exercise effect, providing a scientific basis for training optimization, rehabilitation evaluation, posture correction, and competitive guidance. The EMG measurement method provided by the present invention has the advantages of convenient wearing, stable measurement, simple operation, and strong real-time performance, and is particularly suitable for long-term physiological data monitoring in dynamic and non-laboratory scenarios. It can not only serve professional athlete training but also be applicable to the health management and lower limb function rehabilitation scenarios of the general public. By seamlessly integrating the measurement process with the user's actions, the experience of wearable devices and the data acquisition quality are significantly improved, which helps to promote the implementation and popularization of lower limb movement EMG detection in scientific research and practical applications.

[0012] Furthermore, the system automatically activates the battery power supply function in the circuit board, activates the conditioning amplification, analog-to-digital conversion, and wireless communication modules, without the need for an external power supply or plugging in wires, simplifying the operation process and improving the wearability. During the user's movement, the sampling electrodes continuously obtain the surface EMG signals of the target muscle. The acquired signals are processed through amplification and filtering, and after being converted into digital signals by the analog-to-digital conversion module, they are wirelessly transmitted to the host computer terminal in real time through the Bluetooth low-energy communication module, such as a smartphone, tablet, or computer. Compared with the traditional method of using long wires for connection or wired acquisition, this system transmits the signals to the host computer of the mobile phone, tablet, or computer in real time through Bluetooth, greatly improving the data processing efficiency and mobile portability, and is applicable to various application scenarios such as scientific research training, rehabilitation evaluation, dance teaching, and competitive monitoring.

[0013] Thirdly, the present invention provides a production method for a wearable system for surface electromyogram signal acquisition. By combining ergonomic design, electrode signal acquisition principle and wearable structure optimization, and adopting modular processing and flexible conductive material technology, the high integration and convenient assembly of the system are realized. Through key process steps such as structure presetting, electrode processing, circuit encapsulation and sock knitting, the stability, wearing comfort and data acquisition reliability of the system in a large dynamic scenario are ensured. Firstly, the digital control processing technology is adopted to preset a circuit board installation and sampling platform on the outer side of the rear heel of the sports shoes, ensuring that the circuit components have good assembly positioning reference in terms of structure. Secondly, in the area of the circuit board wiring terminals, special small holes are reserved and thread tapping treatment is carried out for connecting the electromyogram signal transmission line and the ground wire of the metal sock. The mechanical screw crimping connection method is adopted to replace the traditional welding or clamping method, which not only improves the connection strength, but also is convenient for maintenance and replacement, enhancing the stability and durability of the system during long-term movement. In addition, in terms of electrode preparation, the back of the electrode is first sandblasted to improve the surface roughness and adhesion, and then PTFE (polytetrafluoroethylene) coating is sprayed and thermally cured to form a firmly attached, uniformly covered and excellent insulating performance thin film coating, effectively preventing electrical short circuit or signal interference between the electrode and the metal sock, and enhancing the system safety and anti-interference ability. In addition, the electromyogram signal transmission line and the sampling electrode in the system are both connected by a plug-and-play structure, which is convenient for replacement and maintenance, and improves the reusability and service life of the product. The overall structure of the present invention conforms to the anatomical curve of the human leg, is comfortable and natural to wear, does not affect daily movement or clothing matching, and provides a stable and reliable support platform for the popularization and application of surface electromyogram in clinical rehabilitation, sports evaluation, physical training and other scenarios. The production method of the present invention combines multiple key processes, takes into account the system integration, functional stability and use comfort, realizes the high integration of hardware, materials and wearing experience, and provides a feasible and mass-producible technical path for constructing the next-generation flexible, real-time and convenient human signal acquisition system.

[0014] Furthermore, the elastic metal sock used in the present invention is formed by composite knitting of conductive metal fibers (such as silver-plated nylon, stainless steel fibers) and elastic spandex filaments by industrial knitting equipment to form an integral annular structure with continuous conductivity, high elasticity and soft skin-friendly performance. The elastic metal sock not only serves as a reference ground electrode, but also plays a role in fixing and electromagnetic shielding for the electrode and the signal line, significantly enhancing the structural stability and signal acquisition purity of the system under large movements.

[0015] Furthermore, the circuit board is directly pasted on the surface of the platform through electronic sealant. The sealant not only ensures the firm fixation of the board body, avoiding loosening or displacement during movement, but also has good waterproof, dustproof and earthquake resistance performance, effectively protecting the internal components from the erosion of environmental factors such as sweat and dust, and improving the overall durability and reliability of the system. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the wearable system for surface electromyogram signal acquisition of the present invention; Figure 2 It is a schematic structural diagram of the electromyogram signal acquisition system of the present invention; Figure 3 It is a schematic diagram of wearing the wearable system for surface electromyogram signal acquisition of the present invention; In the figure, 1 - shoe; 2 - elastic metal sock; 3 - sampling electrode; 4 - electromyogram signal transmission line; 5 - metal sock ground wire; 6 - component platform; 7 - circuit board; 8 - conductive point. Detailed Embodiments

[0017] The following further describes the present invention in detail with specific embodiments, which is an explanation rather than a limitation of the present invention. In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention. It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0018] Embodiment: Refer to Figure 1 and Figure 2 , the present invention provides a wearable system for surface electromyogram signal acquisition, including a shoe 1, an elastic metal sock 2 and an electromyogram signal acquisition system; the electromyogram signal acquisition system includes a component platform 6, a circuit board 7, a terminal block, a ground terminal, an electromyogram signal transmission line 4, a sampling electrode 3 and a metal sock ground wire 5; The electromyographic signal acquisition system is installed on the shoe 1, and the electromyographic signal acquisition system is connected to the elastic metal sock 2, and the elastic metal sock 2 is located on the top of the shoe 1. The electromyographic signal acquisition system includes a component platform 6 arranged at the heel of the shoe 1, which is used to carry electronic components, namely, a circuit board 7. The circuit board 7 adopts modular packaging and is installed in the component platform 6 area on the outside of the heel of the shoe. A battery module, an electromyographic signal conditioning circuit module, an analog-to-digital conversion module and a Bluetooth communication module are integrated on the circuit board 7. The battery module is respectively connected to the electromyographic signal conditioning circuit module, the analog-to-digital conversion module and the Bluetooth communication module. The electromyographic signal conditioning circuit module is connected to the analog-to-digital conversion module and the Bluetooth communication module in turn. The circuit board 7 is attached to the component platform 6, and a plurality of wiring terminals and a grounding terminal are installed on the circuit board 7. The wiring terminals are connected to the sampling electrode 3 through the electromyographic signal transmission line 4. The sampling electrode 3 is attached to the skin surface of the target muscle area of ​​the user's calf for acquisition. The surface electromyographic signal of the target muscle area, the sampling electrode 3 is attached to the skin surface of the target muscle area of ​​the user's calf, and a polytetrafluoroethylene (PTFE) insulating coating is provided on one side thereof, which is used to realize electrical isolation between the sampling electrode 3 and the elastic metal sock 2, and prevent signal interference or short circuit. The elastic metal sock 2 covers the sampling electrode 3 and the electromyographic signal transmission line 4 on the skin surface of the user's calf. A conductive point 8 is provided on the elastic metal sock 2. The elastic metal sock 2 is connected to the ground terminal through the conductive point 8 in conjunction with the metal sock grounding wire 5, and serves as the reference ground of the system, and has the function of fixing the sampling electrode 3 and the electromyographic signal transmission line 4 and shielding the external electromagnetic interference. The elastic metal sock 2 fits the user's calf as a whole, contacts with a large area of ​​the skin, covers and stabilizes the sampling electrode 3 and the electromyographic signal transmission line 4, and reduces the motion artifacts caused by electrode displacement and wire shaking during exercise, and improves the signal acquisition stability and wearing comfort; Preferably, the shoe 1 can be a sports shoe, or other shoes that can realize special functions such as jumping and dancing; Preferably, the electromyographic signal conditioning circuit includes a low noise instrumentation amplifier; Preferably, the analog-to-digital conversion module is a multi-channel high-resolution ADC chip; Preferably, the Bluetooth communication module supports the BLE 5.0 standard and has low-power operation capability, which can realize real-time, low-power data transmission with a mobile terminal or a host computer. Compared with the traditional long wire connection or wired acquisition method, this system sends signals to a mobile phone, tablet or computer host computer in real time via BLE Bluetooth, greatly improving data processing efficiency and portability, and is suitable for a variety of application scenarios such as scientific research training, rehabilitation assessment, dance teaching, and competitive monitoring; Preferably, the battery module is installed on the component platform 6 in an attached structure; Preferably, the battery module is a rechargeable lithium battery, which is integrated inside the circuit board 7 and is packaged and operated together with other modules of the system; Preferably, the number of the terminal blocks can be 2, 3, 4, 5, 6, 7, 8, or other numbers that can achieve the function of signal acquisition. Preferably, the component platform 6 is a slightly sunken or flat area for accommodating and protecting the overall structure of the circuit board 7. Preferably, the circuit board 7 is installed in the area of the component platform 6 on the outer side of the heel of the shoe 1 and is fixed to the component platform 6 by an adhesive layer or screws. The structure is compact and convenient for replacement and maintenance. Preferably, a conductive gel can be used between the sampling electrode 3 and the skin to improve the electrical contact performance, reduce the skin resistance, and improve the quality of the myoelectric signal.

[0019] A wearable system for surface electromyogram signal acquisition provided by the present invention aims at the technical pain points of existing electromyogram signal acquisition devices, such as poor wearing firmness, serious signal interference, complex wearing, and affecting movement performance in scenarios with large movement amplitudes. It proposes a new system structure design that combines the sampling electrode 3, the electromyogram signal transmission line 4, the elastic metal sock 2, and the electromyogram signal acquisition system. It can stably, continuously, and high-quality acquire the surface electromyogram signals of the target muscle group during movement and wirelessly transmit them to the host computer in real time for visual display and analysis. The core circuit board 7 of the system is integrated on the component platform 6 on the outer side of the shoe heel and fixed by an adhesive method. This area avoids the high-stress area of the sole and the position with large movement amplitude of the calf, not only realizing the compactness of the system structure and module integration, but also avoiding the influence of the circuit board on the movement posture, enabling the wearer to still maintain a free and flexible movement performance during large movements such as running, jumping, and dancing. The sampling electrode 3, the electromyogram signal transmission line 4, and the metal sock ground wire 5 of the system are all replaceable structures, which are convenient for maintenance, highly durable, and support long-term repeated use and modular replacement.

[0020] See Figure 3 In addition, the present invention also provides a method for surface electromyogram signal acquisition, based on the above-mentioned wearable system for surface electromyogram signal acquisition, including the following steps: Step 1: The user puts on the shoe 1 to fix the circuit board 7 in place with the foot. Step 2: Apply a medical conductive gel to the skin surface of the user's target muscle area, and then paste the sampling electrode 3 on the skin surface of the user's target muscle area. Step 3: Arrange the electromyogram signal transmission line 4 along the user's calf, connect one end of the electromyogram signal transmission line 4 to the sampling electrode 3, and the other end to the terminal block. Wear the elastic metal sock 2 on the calf part of the user's target muscle area so that the elastic metal sock 2 wraps and fixes the sampling electrode 3 and the electromyogram signal transmission line 4 as a whole and maintains stable contact. Step 4, the battery module integrated on the circuit board 7 powers up and starts. The user performs dynamic exercises. During the exercise process, the myoelectric signals of the user's target muscle area are continuously collected through the sampling electrode 3. The collected myoelectric signals are transmitted through the myoelectric signal transmission line 4 to the myoelectric signal conditioning circuit for amplification and filtering, and then transmitted to the analog-to-digital conversion module for analog-to-digital conversion and encoding; Step 5, the myoelectric signals after analog-to-digital conversion and encoding are transmitted to the upper computer terminal device in real time through the Bluetooth communication module; Step 6, the upper computer terminal device acquires the myoelectric signals after analog-to-digital conversion and encoding and performs analysis and processing, which are used in application scenarios such as user action recognition, rehabilitation evaluation, or training feedback.

[0021] The present invention also provides a production method for a wearable system for surface myoelectric signal acquisition. Based on the above-mentioned wearable system for lower limb surface myoelectric signal acquisition, it includes the following steps: Step 1, using an injection mold or a digital control processing technology, reserve the component platform 6 area on the outer side of the shoe heel as the installation plane for the myoelectric signal acquisition circuit board; Step 2, install the circuit board 7 on the component platform 6, install several wiring terminals and a grounding terminal on the circuit board 7, and then drill holes and tap threads at the wiring terminals and the grounding terminal, so as to reliably connect the myoelectric signal transmission line 4 and the metal sock grounding wire 5 by screws in the subsequent steps, ensuring stable electrical contact and facilitating maintenance; Step 3, perform sandblasting on the side of the sampling electrode 3 attached to the skin surface of the user's target muscle area to enhance the coating adhesion, then spray a polytetrafluoroethylene insulation coating, and then perform heat curing to form a PTFE insulation layer with excellent wear resistance and insulation performance, ensuring reliable electrical isolation between the electrode and the metal sock during wearing; Step 4, adopt circular knitting technology, and use conductive metal fibers and elastic yarns to be woven together to form an integral tubular elastic metal sock 2 with high elasticity, soft fit, and continuous conductivity, and the size is adapted to the shape of the human calf; in terms of material selection, the elastic metal sock 2 used in the present invention is woven by interweaving conductive metal fibers and elastic fibers, and has excellent conductive performance, breathability, and flexibility, and can be worn for a long time without causing skin discomfort; Step 5, connect one end of the myoelectric signal transmission line 4 to the sampling electrode 3, and connect the other end to the wiring terminal with a screw. Then connect the dedicated conductive points of the elastic metal sock 2 to the grounding terminal with a screw through the metal sock grounding wire 5 to realize the production of a wearable system for surface myoelectric signal acquisition. When in use, first paste the sampling electrode 3 on the target muscle part, and use a medical conductive gel to enhance the conductive effect. Then wear the elastic metal sock 2 to cover and fix the sampling electrode 3 and the myoelectric signal transmission line 4, and the system can start the acquisition function; Preferably, the component platform 6 is rectangular; Preferably, the conductive metal fibers include silver-plated nylon or stainless steel yarns; Preferably, the circuit board 7 is adhered to the component platform 6 by electronic glue to ensure firm fixation without affecting the appearance and wearing comfort.

[0022] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wearable system for collecting surface electromyography signals, characterized in that: The shoe (1) comprises a myoelectric signal acquisition system installed on the shoe (1), the myoelectric signal acquisition system is connected to an elastic metal sock (2), and the elastic metal sock (2) is located on the top of the shoe (1); The electromyographic signal acquisition system comprises a component platform (6) arranged on the heel of a shoe (1), a circuit board (7) being attached to the component platform (6), a plurality of wiring terminals and a grounding terminal being mounted on the circuit board (7), the wiring terminals being connected to sampling electrodes (3) via electromyographic signal transmission lines (4), the sampling electrodes (3) being attached to the skin surface of a target muscle area of ​​a user's calf; The elastic metal sock (2) covers the sampling electrode (3) and the electromyographic signal transmission line (4) on the skin surface of the user's calf, and a conductive point (8) is provided on the elastic metal sock (2). The elastic metal sock (2) is connected to a grounding terminal through the conductive point (8) and the metal sock grounding line (5).

2. A wearable system for collecting surface electromyography signals according to claim 1, characterized in that: The circuit board (7) is integrally mounted with a battery module, an electromyographic signal conditioning circuit module, an analog-to-digital conversion module and a Bluetooth communication module; The battery module is connected to the electromyographic signal conditioning circuit module, the analog-to-digital conversion module and the Bluetooth communication module respectively, and the electromyographic signal conditioning circuit module is connected to the analog-to-digital conversion module and the Bluetooth communication module in turn.

3. A wearable system for collecting surface electromyography signals according to claim 1, characterized in that: A polytetrafluoroethylene insulating coating is provided on one side of the sampling electrode (3) attached to the skin surface of the target muscle area of ​​the user's calf, so as to achieve electrical isolation between the sampling electrode (3) and the elastic metal sock (2).

4. A method for collecting surface electromyography signals, based on a wearable system for collecting surface electromyography signals according to any one of claims 1 to 3, characterized in that: The following steps are involved: The user puts on the shoe (1) so that the circuit board (7) is fixed in place along with the foot; Applying a medical conductive gel to the skin surface of the user's target muscle area, and then sticking a sampling electrode (3) to the skin surface of the user's target muscle area; The electromyographic signal transmission line (4) is laid out along the user's calf, and then the elastic metal sock (2) covering the sampling electrode (3) and the electromyographic signal transmission line (4) is worn on the calf of the user's target muscle area; The user performs dynamic exercise, and during the exercise, the sampling electrodes (3) continuously collect electromyographic signals from the user's target muscle area, and the collected electromyographic signals are transmitted to the circuit board (7) via the electromyographic signal transmission line (4); The collected electromyographic signals are transmitted in real time to a host computer terminal device via the circuit board (7).

5. A method for collecting surface electromyography signals according to claim 4, characterized in that: The method comprises laying the electromyographic signal transmission line (4) along the user's calf, and then wearing the elastic metal sock (2) covering the sampling electrode (3) and the electromyographic signal transmission line (4) on the calf of the user's target muscle area, specifically comprising: The electromyographic signal transmission line (4) is laid out along the user's calf, one end of the electromyographic signal transmission line (4) is connected to the sampling electrode (3), and the other end is connected to the wiring terminal. The elastic metal sock (2) is worn on the calf of the user's target muscle area, so that the elastic metal sock (2) covers and fixes the sampling electrode (3) and the electromyographic signal transmission line (4) as a whole, and maintains stable contact.

6. A method for collecting surface electromyography signals according to claim 4, characterized in that: The circuit board (7) is integrated with a battery module, an electromyographic signal conditioning circuit module, an analog-to-digital conversion module and a Bluetooth communication module; the battery module is respectively connected to the electromyographic signal conditioning circuit module, the analog-to-digital conversion module and the Bluetooth communication module, and the electromyographic signal conditioning circuit module is sequentially connected to the analog-to-digital conversion module and the Bluetooth communication module; The collected electromyographic signal is transmitted to the circuit board (7) via the electromyographic signal transmission line (4), specifically comprising: The collected electromyographic signal is transmitted to the electromyographic signal conditioning circuit through the electromyographic signal transmission line (4) for amplification and filtering, and then transmitted to the analog-to-digital conversion module for analog-to-digital conversion and encoding.

7. A method for collecting surface electromyography signals according to claim 6, characterized in that: The step of sending the collected electromyographic signals to the upper computer terminal device in real time through the circuit board (7) specifically includes: The electromyographic signal after analog-to-digital conversion and encoding is transmitted to the host terminal device in real time through the Bluetooth communication module.

8. A method for producing a wearable system for collecting surface electromyography signals, based on the wearable system for collecting surface electromyography signals of lower limbs as described in any one of claims 1 to 3, characterized in that: The following steps are involved: An injection mold or a digital control processing technology is used to reserve a component platform (6) area on the outside of the heel of the shoe as a mounting plane for the electromyographic signal collection circuit board; Mounting a circuit board (7) on the component platform (6), mounting a plurality of wiring terminals and a grounding terminal on the circuit board (7), and then drilling and tapping holes at the wiring terminals and the grounding terminal; The sampling electrode (3) is sandblasted on one side of the skin surface of the target muscle area of ​​the user to enhance the adhesion of the coating, and then a polytetrafluoroethylene insulation coating is sprayed and then thermally cured; Using circular knitting technology, conductive metal fibers and elastic yarns are compositely knitted to form an elastic metal sock (2); One end of the electromyographic signal transmission line (4) is connected to the sampling electrode (3), and the other end is connected to the wiring terminal with a screw, and then the elastic metal sock (2) is connected to the grounding terminal through the metal sock grounding wire (5) with a screw.

9. A wearable system for collecting surface electromyography signals according to claim 8, characterized in that: The conductive metal fibers include silver-plated nylon or stainless steel yarns.

10. A wearable system for collecting surface electromyography signals according to claim 8, characterized in that: The step of mounting the circuit board (7) on the component platform (6) specifically comprises: Glue the circuit board (7) onto the component platform (6) using electronic glue.

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