Multi-lead wireless wearable myoelectricity acquisition system

Abstract

The embodiment of the invention provides a multi-lead wireless wearable myoelectricity acquisition system, and belongs to the crossing field of biomedical engineering and electronic technology. The electromyographic acquisition system comprises an electromyographic electrode pair module used for acquiring electromyographic signals and sending the electromyographic signals to an active circuit module; the active circuit module is used for processing the received electromyographic signals so as to improve the anti-interference capability and the acquisition accuracy, and sending the processed electromyographic acquisition input signals to the electromyographic acquisition module; due to the special design of the active circuit module, the active circuit module has the characteristics of ultrahigh input impedance, low voltage noise, bias current and the like, noise interference of electromagnetism, environment, motion and the like can be effectively resisted, meanwhile, power frequency interference is further reduced by processing common-mode signals through the auxiliary driving module, the stability and reliability of electromyographic signal acquisition in a complex environment are ensured, and the electromyographic signal acquisition efficiency is improved. And signals can be accurately acquired in sports venues or places with dense electronic equipment.

Description

Technical Field

[0001] The present invention relates to the cross-technical field of biomedical engineering and electronic technology, and in particular to a multi-lead wireless wearable myoelectric acquisition system. Background Art

[0002] The surface electromyography (sEMG) acquisition system is a device that records the weak potential difference caused by muscle contraction by placing electrodes on the surface of human skin. After amplification and conversion, these potential signals form surface electromyography signals that can be processed, which can accurately reflect the real-time muscle activity status. The sEMG acquisition system has a wide range of applications in muscle fatigue assessment, rehabilitation training, human-computer interaction, sports training and other fields. With the continuous expansion of application fields, miniaturization and wearability have become the research and development trends of sEMG acquisition systems.

[0003] However, existing wearable sEMG mainly faces the following shortcomings.

[0004] First, the existing wearable sEMG systems are mostly discrete structures, that is, each electrode pair independently becomes a miniaturized electromyography collector and can be placed on the surface of a muscle to collect electromyography signals, and multiple electromyography collectors form a multi-lead system. However, this discrete electromyography collection system cannot be applied to local high-density electromyography signal collection.

[0005] Second, the signal acquisition accuracy of existing wearable sEMG systems is insufficient, especially when using dry electrodes with higher skin contact impedance.

[0006] Third, in increasingly complex application environments, existing sEMG has the disadvantage of insufficient resistance to noise interference due to the different skin surface conditions, different wearer movement states and the complexity of the surrounding environment. Summary of the invention

[0007] The purpose of the embodiment of the present invention is to provide a multi-lead wireless wearable electromyography acquisition system, which is designed to effectively overcome the many drawbacks of existing wearable surface electromyography (sEMG) acquisition systems. Through the innovative active electrode design architecture, the system's ability to resist various types of noise interference is greatly enhanced, ensuring that electromyography signals can still be stably and accurately acquired in complex and changeable usage environments, such as different skin surface conditions, the wearer's diverse motion states, and interference factors in the surrounding environment.

[0008] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides a multi-lead wireless wearable electromyography acquisition system, comprising: an electromyography electrode pair module, which is used to collect electromyography signals and send the electromyography signals to an active circuit module; an active circuit module, which is used to process the received electromyography signals to improve the anti-interference ability and acquisition accuracy, and send the processed electromyography acquisition input signals to the electromyography acquisition module; an electromyography acquisition module, which is used to filter, amplify and perform analog-to-digital conversion on the electromyography acquisition input signals, and send the converted digital signals to a data central control interaction module; a data central control interaction module, which is used to connect and control the electromyography acquisition module, and transmit the collected digital signals to a host computer by wireless radio frequency.

[0009] Optionally, it also includes: an auxiliary driving module, which is used to collect the common-mode signals at the output ends of each voltage amplifier in the electromyography acquisition module and amplify them in reverse, and then send the processed auxiliary driving output signals to the auxiliary driving electrodes; auxiliary driving electrodes, which are used to conduct the signals processed by the auxiliary driving modules and receive the signals from the auxiliary driving modules for output, so as to assist in reducing power frequency interference.

[0010] Optionally, the electromyography electrode pair module includes several input electrodes and reference electrodes; wherein, several of the input electrodes are used to contact muscle tissue from different positions or angles and sense changes in weak electrical signals generated by muscles in different states; and the reference electrode is used to provide a reference potential benchmark for the input electrode.

[0011] Optionally, the active circuit module includes several active circuits; wherein, several of the active circuits use any one of voltage following and voltage amplification to process the collected electromyographic signals to improve the accuracy of the collected signals and the anti-interference ability of the system.

[0012] Optionally, when the active circuit adopts a voltage-following implementation mode, the active circuit module further includes a plurality of balancing resistors, and each balancing resistor is adapted one-to-one to the active circuit; the resistance range of the balancing resistor is between 1Ω and 1kΩ, which is used to improve the consistency between leads.

[0013] Optionally, the electromyography acquisition module includes a filter group, a voltage amplifier and an analog-to-digital converter; wherein the filter group is connected one-to-one to the active circuit module; the voltage amplifier adopts a differential input method, and the two input ends of the voltage amplifier respectively correspond to the input electrode and the reference electrode of the same electromyography electrode pair in the electromyography electrode pair module; the analog-to-digital converter is connected to the output end of the voltage amplifier, and is used to convert the analog signal output by the voltage amplifier into a digital signal, and send it to the data central control interaction module.

[0014] Optionally, the filter group includes a high-pass RC filter and a low-pass RC filter; wherein the cutoff frequency of the high-pass RC filter is higher than 0.1 Hz and lower than the lowest frequency required for electromyographic frequency analysis.

[0015] Optionally, it also includes: a power management module, which is used to manage the system power supply, receive the power from the battery and distribute it to each module; a battery, which is used to provide power to the system and output power to the power management module.

[0016] Optionally, it also includes: a charging management module, which is used to manage the charging of the battery and control the charging process of the battery by an external power source.

[0017] Optionally, the host computer is equipped with host computer software for receiving the electromyographic signal data transmitted by the data central control interaction module and analyzing, processing and storing the data, and performing information exchange with the data central control interaction module.

[0018] Through the above technical solution, this solution has the following beneficial effects:

[0019] Strong anti-interference ability: The special design of the active circuit module gives it the characteristics of ultra-high input impedance, low voltage noise and bias current, which can effectively resist electromagnetic, environmental, motion and other noise interference. At the same time, the processing of common-mode signals by the right leg drive module further reduces power frequency interference, ensuring the stability and reliability of electromyographic signal acquisition in complex environments, such as accurate signal acquisition in sports venues or places with dense electronic equipment.

[0020] High acquisition accuracy: The active circuit module avoids signal distortion caused by the contact impedance between the electrode and the skin. The filter group, high-quality voltage amplifier and high-resolution analog-to-digital converter in the electromyography acquisition module work together to ensure accuracy in every link from the signal acquisition source to the conversion output. It can accurately capture subtle changes in muscle potential and provide more accurate data support for muscle fatigue assessment, rehabilitation training guidance, etc.

[0021] Miniaturization and good wearability: The integrated design and reasonable layout of each module make the entire system small and easy to wear, without affecting the user's daily activities. It can be worn comfortably on the body for a long time for continuous monitoring. Whether it is athletes in training or competition, or patients in the process of rehabilitation, it can be used conveniently, greatly expanding the breadth and depth of application scenarios.

[0022] Wide range of applications: Combining the above advantages, the system has important application value in many fields such as muscle fatigue assessment, rehabilitation training, human-computer interaction, sports training, etc. It can provide powerful tools for professionals in different fields and promote the technological development and practical application in related fields to achieve better results.

[0023] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the module of the multi-lead wireless wearable electromyography acquisition system of the present invention. Figure 1 .

[0026] Figure 2 This is a schematic diagram of the module of the multi-lead wireless wearable electromyography acquisition system of the present invention. Figure 2 .

[0027] Figure 3a Schematic diagram of an active electrode array unit according to an embodiment of the present invention.

[0028] Figure 3b Schematic diagram of an amplifier and a control unit according to an embodiment of the present invention.

[0029] Figure 3c Schematic diagram of pin connection of AD8244 according to an embodiment of the present invention.

[0030] Figure 4 Schematic diagram of the myoelectric acquisition system according to an embodiment of the present invention worn on an arm.

[0031] Figure 5a It is a schematic diagram of the system input noise level measured by the zero-impedance input noise test method shown in an embodiment of the present invention.

[0032] Figure 5b It is a schematic diagram of signal spectrum under three different test environments in an actual wearing test shown in an embodiment of the present invention.

[0033] Description of Reference Numerals

[0034] 1. EMG electrode pair module; 101. Input electrode; 102. Reference electrode; 2. Auxiliary drive electrode; 3. Active circuit module; 301. Active circuit; 302. Balancing resistor; 4. Auxiliary drive module; 5. EMG acquisition module; 501. Filter group; 502. Voltage amplifier; 503. Analog-to-digital converter; 6. Data central control interaction module; 7. Power management module; 8. Battery; 9. Charging management module; 10. Host computer software. DETAILED DESCRIPTION

[0035] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0036] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application are in compliance with the relevant provisions of laws and regulations. In the embodiments of this application, some existing solutions in the industry such as certain software, components, and models may be mentioned, which should be considered as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of this application, but it does not mean that the applicant has or will necessarily use the solution.

[0037] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a multi-lead wireless wearable electromyography acquisition system, including: an electromyography electrode pair module 1, which is used to collect electromyography signals and send the electromyography signals to an active circuit module 3; the active circuit module 3 is used to process the received electromyography signals to improve the anti-interference ability and acquisition accuracy, and send the processed electromyography acquisition input signal to the electromyography acquisition module 5; the electromyography acquisition module 5 is used to amplify and analog-to-digital convert the electromyography acquisition input signal, and send the converted digital signal to the data central control interaction module 6; the data central control interaction module 6 is used to connect the electromyography acquisition module 5 and transmit the collected digital signal to the host computer by wireless radio frequency; the auxiliary drive module 4 is used to collect the common mode signal of the electromyography acquisition module 5 and reverse amplify it, and then send the processed auxiliary drive processing output signal to the auxiliary drive electrode 2; the auxiliary drive electrode 2 is used to conduct the signal processed by the auxiliary drive module 4, and receive the signal from the auxiliary drive module 4 for output, so as to assist in reducing power frequency interference.

[0038] Specifically, the myoelectric electrode pair module 1 includes a plurality of input electrodes 101 and reference electrodes 102; wherein the plurality of input electrodes 101 are used to contact the muscle tissue from different positions or angles and sense the changes in weak electrical signals generated by the muscle in different states; the reference electrode 102 is used to provide a reference potential reference for the input electrode 101, and the input electrode 101 and the reference electrode 102 are surface electrodes of the same material and size, and the electrode types include hydrogel electrodes, dry gel electrodes or metal electrodes, etc.;

[0039] In the above scheme, the myoelectric electrode pair module 1 is composed of a plurality of input electrodes 101 and reference electrodes 102. The input electrode 101 is in close contact with the muscle tissue from different positions or angles, and senses the changes in weak electrical signals generated by the muscle in contraction, relaxation and different exercise intensities with high sensitivity. The reference electrode 102 provides a stable reference potential benchmark for the input electrode 101 to ensure the relative accuracy of the collected signal. The collected myoelectric signal will be sent to the active circuit module 3 in a timely manner.

[0040] Specifically, the active circuit module 3 includes a plurality of active circuits 301, wherein the plurality of active circuits 301 process the collected electromyographic signals by using any one of voltage following and voltage amplification to improve the accuracy of the collected signals and the anti-interference capability of the system.

[0041] More specifically, when the active circuit 301 adopts a voltage-following implementation mode, the active circuit module 3 also includes a plurality of balancing resistors 302, and each balancing resistor 302 is matched one-to-one with the active circuit 301, and the resistance range of the balancing resistor 302 is between 1Ω and 1kΩ, which is used to improve the consistency between leads.

[0042] In the above scheme, the active circuit module 3 includes several active circuits 301 and a balancing resistor 302. After the active circuit 301 receives the electromyographic signal from the electromyographic electrode pair module 1, it can perform voltage following or further high-gain voltage amplification processing according to actual needs. In the voltage following mode, the high contact impedance part of the electromyographic electrode to the skin can be effectively isolated to avoid signal distortion; in the high-gain amplification mode, the weak signal strength is enhanced. Its ultra-high input impedance, low voltage noise and bias current characteristics above GΩ level greatly improve the system's resistance to electromagnetic noise, environmental noise, motion noise and variability of the electromyographic electrode pair and skin contact impedance, ensuring the high quality of the collected signal. When the voltage following implementation method is adopted, the balancing resistor 302 (resistance range is between 1Ω and 1kΩ) can effectively improve the consistency between leads, ensure the stability and balance of multi-lead signal processing, and the processed signal will be accurately sent to the electromyographic acquisition module 5.

[0043] Specifically, the electromyography acquisition module 5 includes a filter group 501, a voltage amplifier 502 and an analog-to-digital converter 503; wherein the filter group 501 is connected one-to-one with the active circuit module 3; the voltage amplifier 502 adopts a differential input method, and the two input ends of the voltage amplifier 502 respectively correspond to the input electrode 101 and the reference electrode 102 of the same electromyography electrode pair in the electromyography electrode pair module 1; the analog-to-digital converter 503 is connected to the output end of the voltage amplifier 502, and is used to convert the analog signal output by the voltage amplifier 502 into a digital signal, and send it to the data central control interaction module 6.

[0044] The filter group 501 includes a high-pass RC filter and a low-pass RC filter; wherein the cut-off frequency of the high-pass RC filter is higher than 0.1 Hz and lower than the lowest frequency required for myoelectric frequency analysis.

[0045] In the above scheme, the filter group 501 is connected one-to-one with the active circuit module 3, wherein the high-pass RC filter (the cut-off frequency is higher than 0.1Hz and lower than the minimum frequency required for myoelectric frequency analysis) can effectively filter out low-frequency interference signals, such as the potential drift of the electrode-skin interface and the environmental low-frequency noise; the low-pass RC filter (the cut-off frequency is higher than the single-channel maximum sampling rate of myoelectric acquisition) blocks high-frequency noise, ensuring that the signal entering the subsequent processing link is in a suitable frequency range. The voltage amplifier 502 adopts a differential input mode, and its two input ends correspond to the input electrode 101 and the reference electrode 102 of the same myoelectric electrode pair in the myoelectric electrode pair module 1, respectively. By taking advantage of its stable gain and low voltage noise, the weak myoelectric signal processed by the filter group is amplified to enhance the signal strength for subsequent conversion and processing. The analog-to-digital converter 503 is connected to the output end of the voltage amplifier 502, and has a resolution of at least 16 bits. It can accurately convert the electromyographic analog signal output by the voltage amplifier into a digital signal and send it to the data central control interaction module 6, providing a high-resolution digital signal basis for subsequent wireless transmission and data analysis.

[0046] The data central control interaction module 6 is connected to the electromyography acquisition module 5 on the one hand, and receives the digital signal sent by it; on the other hand, it transmits the collected digital signal to the host computer stably and quickly through wireless radio frequency technology. At the same time, the data central control interaction module 6 also has the functions of receiving and sending system commands, system control, etc., which can realize efficient interaction with the host computer and other external devices, and ensure the intelligent and automatic operation of the system.

[0047] It also includes: a power management module 7 for managing the system power supply, receiving the electric energy from the battery 8 and distributing it to each module; the battery 8 for providing electric energy to the system and outputting electric energy to the power management module 7.

[0048] As the energy core of the system, the battery 8 provides stable and reliable power for the entire system and outputs power to the power management module 7. The power management module 7 performs all-round and fine management of the system power supply, including reasonable allocation of power to each module, voltage stabilization and other operations, to ensure that each module can obtain appropriate power supply under different working conditions, maintain the normal and efficient operation of the system, and avoid signal acquisition errors or system failures caused by power problems.

[0049] It also includes: a charging management module 9, which is used to manage the charging of the battery 8 and control the charging process of the battery 8 by an external power source.

[0050] The charging management module 9 is responsible for the safe and efficient charging management of the battery 8. It can accurately control the charging process of the battery 8 by the external power source, such as adjusting the charging current and voltage, and monitoring the battery status in real time, effectively preventing damage to the battery due to overcharging, over-discharging, etc., extending the battery life, ensuring that the system is always available, and improving the user experience.

[0051] Optionally, the host computer is equipped with host computer software 10 for receiving the electromyographic signal data transmitted by the data central control interaction module 6 and analyzing, processing and storing the data, and performing data interaction with the data central control interaction module 6 .

[0052] The host computer software 10 installed in the host computer is the key platform for system data processing and analysis. It receives the electromyographic signal data transmitted by the data central control interaction module 6, and uses advanced algorithms and data analysis models to conduct in-depth analysis, processing and storage of these data. At the same time, the host computer software 10 also provides users with an intuitive and convenient operation interface, which facilitates users to remotely control the electromyographic acquisition system, set parameters and query data, etc., realizes efficient human-computer interaction functions, and makes the application of the entire system more intelligent and humanized.

[0053] like Figure 3a and Figure 3b As shown, a specific myoelectric acquisition system implementation scheme of the present invention is shown, which is composed of an active electrode array unit ( Figure 3a ) and amplifier and control unit ( Figure 3b The two parts can be integrated through the connection interface to form an 8-lead wireless wearable myoelectric acquisition system.

[0054] like Figure 3a As shown, the active electrode array unit carrier is a flexible circuit board, which mainly includes an electromyographic electrode pair module, an active circuit module and an auxiliary driving electrode. Each electromyographic electrode pair module is integrated with the corresponding active circuit module (such as Figure 3a The active circuit adopts the voltage follower implementation method, and the core component is the single-gain buffer AD8244. AD8244 is a four-channel single-gain buffer, which uses two channels to allocate two channels to the input electrode and reference electrode in a myoelectric electrode pair ( Figure 3c ).

[0055] like Figure 3bAs shown, the amplifier and control unit mainly include a filter group (resistance-capacitance filter group), an amplifier (8-channel amplifier) ​​and an ADC chip (model ADS1299), an electrode interface, a main control and RF chip (model NordicnRF52840), a battery interface, a charging USB interface, and may also include a power management module and a charging management module.

[0056] Figure 4 The system is shown in the figure. The active electrode array unit is wrapped around the forearm muscle surface, and eight myoelectric electrodes are connected to different muscles around the forearm. The amplifier and control unit are wrapped around the wrist.

[0057] Figure 5a The system input noise level measured by the zero impedance input noise test method is demonstrated. In the bandwidth range of 1-125Hz, the input reference noise level is <1.5μVp-p and <0.5μVrms. Figure 5b The data shown above show the signal spectrum in three different test environments during the actual wearing test, proving that there is no obvious 50Hz power frequency noise when the system collects electromyographic signals. The data shown above proves the low system noise level and high anti-interference ability of the system.

[0058] The system can be applied to any application scenario that requires collecting forearm muscle electromyographic signals, and is particularly suitable for electromyographic-based gesture recognition applications.

[0059] This electromyography acquisition system has the following beneficial effects:

[0060] Strong anti-interference ability: The special design of the active circuit module gives it the characteristics of ultra-high input impedance, low voltage noise and bias current, which can effectively resist electromagnetic, environmental, motion and other noise interference. At the same time, the processing of common-mode signals by the right leg drive module further reduces power frequency interference, ensuring the stability and reliability of electromyographic signal acquisition in complex environments, such as accurate signal acquisition in sports venues or places with dense electronic equipment.

[0061] High acquisition accuracy: The active circuit module avoids signal distortion caused by the contact impedance between the electrode and the skin. The filter group, high-quality voltage amplifier and high-resolution analog-to-digital converter in the electromyography acquisition module work together to ensure accuracy in every link from the signal acquisition source to the conversion output. It can accurately capture subtle changes in muscle potential and provide more accurate data support for muscle fatigue assessment, rehabilitation training guidance, etc.

[0062] Miniaturization and good wearability: The integrated design and reasonable layout of each module make the entire system small and easy to wear, without affecting the user's daily activities. It can be worn comfortably on the body for a long time for continuous monitoring. Whether it is athletes in training or competition, or patients in the process of rehabilitation, it can be used conveniently, greatly expanding the breadth and depth of application scenarios.

[0063] Wide range of applications: Combining the above advantages, the system has important application value in many fields such as muscle fatigue assessment, rehabilitation training, human-computer interaction, sports training, etc. It can provide powerful tools for professionals in different fields and promote the technological development and practical application in related fields to achieve better results.

[0064] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0065] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0066] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0067] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0068] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0069] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0070] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0071] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0072] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. A multi-lead wireless wearable electromyography acquisition system, characterized in that: include: The myoelectric electrode pair module (1) is used to collect myoelectric signals and send the myoelectric signals to the active circuit module (3); An active circuit module (3) is used to process the received electromyographic signal to improve anti-interference capability and acquisition accuracy, and to send the processed electromyographic acquisition input signal to the electromyographic acquisition module (5); The electromyography acquisition module (5) is used to filter, amplify and perform analog-to-digital conversion on the electromyography acquisition input signal, and send the converted digital signal to the data central control interaction module (6); The data central control interaction module (6) is used to connect and control the electromyography acquisition module (5) and transmit the acquired digital signal to the host computer by radio frequency.

2. The multi-lead wireless wearable electromyography acquisition system according to claim 1, characterized in that: Also includes: An auxiliary driving module (4) is used to collect the common mode signal at the output end of each voltage amplifier (502) in the electromyographic acquisition module (5) and amplify it in reverse, and then send the processed auxiliary driving processing output signal to the auxiliary driving electrode (2); The auxiliary driving electrode (2) is used to conduct the signal processed by the auxiliary driving module (4) and receive the signal from the auxiliary driving module (4) for output, so as to assist in reducing power frequency interference.

3. The multi-lead wireless wearable electromyography acquisition system according to claim 1, characterized in that: The electromyographic electrode pair module (1) comprises a plurality of input electrodes (101) and a reference electrode (102); Wherein, a plurality of the input electrodes (101) are used to contact the muscle tissue from different positions or angles and sense the changes in weak electrical signals generated by the muscle in different states; The input electrode (101) and the reference electrode (102) are surface electrodes made of the same material and size; The reference electrode (102) is used to provide a reference potential reference for the input electrode (101).

4. The multi-lead wireless wearable electromyography acquisition system according to claim 1, characterized in that: The active circuit module (3) comprises a plurality of active circuits (301); Among them, several active circuits (301) process the collected electromyographic signals by using any one of voltage following and voltage amplification methods, so as to improve the accuracy of the collected signals and the anti-interference ability of the system.

5. The multi-lead wireless wearable electromyography acquisition system according to claim 4, characterized in that: When the active circuit (301) adopts a voltage-following implementation mode, the active circuit module (3) further comprises a plurality of balancing resistors (302), and each balancing resistor (302) is matched one by one with the active circuit (301); The resistance range of the balancing resistor (302) is between 1Ω and 1kΩ, and is used to improve the consistency between leads.

6. The multi-lead wireless wearable electromyography acquisition system according to claim 1, characterized in that: The electromyography acquisition module (5) comprises a filter group (501), a voltage amplifier (502) and an analog-to-digital converter (503); Wherein, the filter group (501) is connected one-to-one with the active circuit module (3); The voltage amplifier (502) adopts a differential input mode, and the two input ends of the voltage amplifier (502) respectively correspond to the input electrode (101) and the reference electrode (102) of the same electromyographic electrode pair in the electromyographic electrode pair module (1); The analog-to-digital converter (503) is connected to the output end of the voltage amplifier (502) and is used to convert the analog signal output by the voltage amplifier (502) into a digital signal and send it to the data central control interaction module (6).

7. The multi-lead wireless wearable electromyography acquisition system according to claim 6, characterized in that: The filter group (501) comprises a high-pass resistor-capacitor filter and a low-pass resistor-capacitor filter; The cut-off frequency of the high-pass RC filter is higher than 0.1 Hz and lower than the lowest frequency required for myoelectric frequency analysis.

8. The multi-lead wireless wearable electromyography acquisition system according to claim 1, characterized in that: Also includes: A power management module (7) is used to manage the system power supply, receive the power from the battery (8) and distribute it to each module; The battery (8) is used to provide electric energy to the system and output electric energy to the power management module (7).

9. The multi-lead wireless wearable electromyography acquisition system according to claim 8, characterized in that: Also includes: A charging management module (9) is used to manage the charging of the battery (8) and control the charging process of the battery (8) by an external power source.

10. The multi-lead wireless wearable electromyography acquisition system according to claim 1, characterized in that: The host computer is equipped with host computer software (10) for receiving electromyographic signal data transmitted by the data central control interaction module (6) and performing analysis, processing and storage, and performing information exchange with the data central control interaction module (6).

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