Surface electromyogram signal collector

Abstract

The utility model provides a surface electromyogram signal collector, which is characterized in that a pre-amplification and filtering unit is constructed by utilizing a chip integrated with an amplifier and a filter; the signal acquisition unit in contact with a measured object is in one-to-one plug-in connection with the pre-amplification and filtering unit; the pre-amplification and filtering unit is connected with the control module; the wireless signal transmitting module is connected with the control module and external equipment; the power supply module is connected with the pre-amplification and filtering module and the control module for power supply. According to the scheme, the chip is used for constructing the pre-amplification and filtering unit, an amplifier and a filter are integrated in the chip, so that the pre-amplification and filtering unit has the advantages of low power consumption, small size and small signal interference, and in addition, the signal acquisition unit and the pre-amplification and filtering unit are detachably connected, so that the signal acquisition unit and the pre-amplification and filtering unit are convenient to use. In conclusion, the surface electromyogram signal collector has the advantages of being low in power consumption, small in size and high in collection result accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of bioelectricity control, in particular to a surface electromyography signal collector. Background Art

[0002] Electromyography (EMG) refers to the electrical signal generated by muscles when they are active. Surface electromyography (sEMG) is the combined effect of superficial muscle EMG and electrical activity on nerve trunks on the skin surface, which can reflect neuromuscular activity to a certain extent. sEMG has the advantages of non-invasiveness, non-traumaticity and simple operation in measurement. Therefore, sEMG has important practical value in clinical medicine, ergonomics, rehabilitation medicine and sports science.

[0003] In the existing surface electromyography signal collector, the collection electrode realizes surface electromyography signal collection by contacting the collected object. Then, the pre-amplification and filtering module amplifies and filters the collected surface electromyography signal, and sends the processed surface electromyography signal to the controller, which performs relevant processing on the surface electromyography signal.

[0004] However, the above-mentioned preamplifier and filter module is constructed based on discrete components, specifically including several stages of preamplifiers and filters, and each preamplifier and filter module is fixedly connected to the corresponding collection electrode, that is, it cannot be disassembled when not in use. The above makes the existing surface electromyography signal collector have the problems of high power consumption and large size. Moreover, the preamplifier and filter module constructed by discrete components has the problem of large signal interference, which makes the existing surface electromyography signal collector also have the problem of low accuracy of surface electromyography signal collection results. Utility Model Content

[0005] In view of this, an embodiment of the utility model provides a surface electromyography signal collector to achieve the purpose of reducing the power consumption and volume of the surface electromyography signal collector and improving the accuracy of the collection results.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] The first aspect of the embodiment of the utility model discloses a surface electromyography signal collector, comprising: a signal acquisition module, a preamplification and filtering module, a control module, a power supply module and a wireless signal transmission module;

[0008] The signal acquisition module includes at least one signal acquisition unit;

[0009] The preamplifier and filter module includes at least one preamplifier and filter unit; the preamplifier and filter unit is constructed using a chip integrating an amplifier and a filter;

[0010] The input end of the signal acquisition unit contacts the object to be measured to collect surface electromyographic signals, and the output end of the signal acquisition unit is connected to the input end of the preamplifier and filter unit in a one-to-one plug-in manner to send the surface electromyographic signals to the preamplifier and filter unit;

[0011] The output end of the preamplifier and filter unit is connected to the input end of the control module, and the preamplifier and filter unit amplifies and filters the surface electromyography signal to obtain an analog signal and sends it to the control module;

[0012] The wireless signal transmission module is connected to the output end of the control module and the input end of the external device;

[0013] The control module performs analog-to-digital conversion on the analog signal to obtain a digital signal, and sends the digital signal to the external device through the wireless signal transmission module;

[0014] The power supply module is connected to the preamplifier and filter module and the control module for power supply.

[0015] Preferably, the signal acquisition unit comprises: a first acquisition electrode, a second acquisition electrode, a reference ground electrode and an interface;

[0016] The first surface of the first collecting electrode, the first surface of the second collecting electrode and the first surface of the reference grounding electrode are in contact with the collected object by pasting gold-plated copper sheet electrodes;

[0017] The first collecting electrode, the second collecting electrode and the reference grounding electrode are arranged in a straight line and in parallel on a printed circuit board;

[0018] The interface is arranged on one side of the printed circuit board, and the interface is connected to the input end of the corresponding preamplifier and filter unit in a plug-in manner.

[0019] Preferably, the first collection electrode, the second collection electrode and the reference ground electrode are all flexible dry electrodes.

[0020] Preferably, the first collecting electrode, the second collecting electrode and the reference grounding electrode are all between 0.5 mm and 0.7 mm thick and have an area greater than 1 cm 2 Bare copper layer.

[0021] Preferably, a shielding layer is provided on a second surface opposite to the first surface of the first collecting electrode, the first surface of the second collecting electrode and the first surface of the reference grounding electrode.

[0022] Preferably, the power supply module includes a power supply unit, a first linear voltage stabilizing unit and a second linear voltage stabilizing unit;

[0023] The power supply unit is connected to the preamplifier and filter module through the first linear voltage regulator unit to supply power, and is connected to the control module through the second linear voltage regulator unit to supply power.

[0024] Preferably, the wireless signal transmission module includes at least one Bluetooth signal transmission unit;

[0025] The Bluetooth signal transmitting unit is connected to the output end of the control module and the input end of the external device, and transmits the digital signal output by the control module to the external device.

[0026] Preferably, the chip integrating the amplifier and the filter comprises an AD8232 chip.

[0027] Preferably, the control module comprises: a microcontroller based on an ARM Cortex-M4 core.

[0028] Preferably, the number of the signal acquisition units and the number of the preamplification and filtering units are both between 8 and 12, and the number of the signal acquisition units and the number of the preamplification and filtering units are the same.

[0029] A surface electromyography signal collector based on the above-mentioned embodiment of the utility model includes: a signal acquisition module, a preamplifier and filter module, a control module, a power supply module and a wireless signal transmission module. The signal acquisition module includes at least one signal acquisition unit, and the preamplifier and filter module includes at least one preamplifier and filter unit; the preamplifier and filter unit is constructed using a chip integrating an amplifier and a filter; the input end of the signal acquisition unit contacts the object to be measured to collect surface electromyography signals, and the output end of the signal acquisition unit is connected to the input end of the preamplifier and filter unit in a one-to-one plug-in manner; the output end of the preamplifier and filter unit is connected to the input end of the control module; the wireless signal transmission module is connected to the output end of the control module and the input end of the external device; the power supply module is connected to the preamplifier and filter module and the control module for power supply. In the present solution, a preamplifier and filter unit is constructed using a chip. Since the amplifier and the filter are integrated in the chip, the preamplifier and filter unit has the advantages of low power consumption, small size and low signal interference. In addition, the signal acquisition unit and the preamplifier and filter unit are connected in a detachable manner, which can be disassembled when not in use to reduce the size. In summary, the surface electromyography signal collector of the present application has the advantages of low power consumption, small size and high accuracy of the acquisition results. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0031] Figure 1 A structural diagram of a surface electromyography signal collector disclosed in an embodiment of the utility model;

[0032] Figure 2 A circuit diagram of a preamplifier and filter unit disclosed in an embodiment of the utility model;

[0033] Figure 3 A schematic diagram of PCB wiring of a signal acquisition unit disclosed in an embodiment of the utility model;

[0034] Figure 4 A circuit structure diagram of a power supply unit disclosed in an embodiment of the utility model;

[0035] Among them, 1 is a signal acquisition module, 2 is a preamplifier and filter module, 3 is a control module, 4 is a power supply module, 5 is a wireless signal transmission module, 11 is a signal acquisition unit, 21 is a preamplifier and filter unit, J1 is a first acquisition electrode, J2 is a second acquisition electrode, J3 is a reference ground electrode, and 31 is an interface. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising 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, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0038] like Figure 1As shown, it is a structural diagram of a surface electromyography signal collector disclosed in an embodiment of the utility model, including a signal acquisition module 1, a preamplification and filtering module 2, a control module 3, a power supply module 4 and a wireless signal transmission module 5.

[0039] The signal acquisition module 1 includes at least one signal acquisition unit 11 .

[0040] The preamplifier and filter module 2 includes at least one preamplifier and filter unit 21 .

[0041] Preferably, the number of the signal acquisition units 11 and the number of the preamplification and filtering units 21 are both between 8 and 12, and the number of the signal acquisition units 11 and the number of the preamplification and filtering units 21 are the same.

[0042] It should be noted that the preamplifier and filter unit 21 is constructed using a chip integrating an amplifier and a filter, so as to reduce the volume of the preamplifier and filter unit 21 and the preamplifier and filter module 2 .

[0043] The input end of the signal acquisition unit 11 contacts the object to be measured to collect surface electromyographic signals, and the output end of the signal acquisition unit 11 is connected to the input end of the preamplifier and filter unit 21 in a one-to-one plug-in manner to send the surface electromyographic signals to the preamplifier and filter unit 21.

[0044] It is understandable that the one-to-one plug-in connection means that the output end of a signal acquisition unit 11 can only be connected one-to-one to one of the preamplification and filtering units 21, and can be disassembled when not in use to reduce the volume and facilitate transportation.

[0045] Preferably, the signal acquisition unit 11 includes two acquisition electrodes and one reference ground electrode, and both the acquisition electrode and the reference ground electrode are flexible dry electrodes.

[0046] Among them, the flexible dry electrode is an electrode that has the characteristics of both a dry electrode and a flexible electrode sheet.

[0047] In the field of surface electromyographic signal acquisition, electrodes are divided into two types according to the material: wet electrodes and dry electrodes. The maintenance of wet electrodes is inconvenient. In addition, flexible electrode sheets can improve the fit between electrodes and skin, thereby improving the quality of surface electromyographic signal acquisition. Combining the characteristics of dry electrodes and flexible electrode sheets, the utility model adopts flexible dry electrodes.

[0048] Specifically, the first surfaces of the collection electrode and the reference ground electrode are used to contact the collected object. The collection electrode is used to collect the surface electromyographic signal of the collected object and send the surface electromyographic signal to the corresponding preamplifier and filtering unit 21. The reference ground electrode is used to collect the surface reference electrical signal of the collected object and send the surface reference electrical signal to the corresponding preamplifier and filtering unit 21.

[0049] In another embodiment, a shielding layer is provided on the second surface of the collection electrode and the reference ground electrode, which is opposite to the first surface. The influence of the external electromagnetic field (including 50 Hz power frequency interference) on the electrode collection signal can be reduced, because the shielding layer can provide a physical barrier to block the interference signal from the external electromagnetic field, especially the 50 Hz power frequency interference related to the power system. Secondly, the shielding layer can also reduce the sensitivity of the electrode to the surrounding electromagnetic induction.

[0050] The output end of the preamplifier and filter unit 21 is connected to the input end of the control module 3 . The preamplifier and filter unit 21 amplifies and filters the surface electromyography signal to obtain an analog signal and sends it to the control module 3 .

[0051] The wireless signal transmitting module 5 is connected to the output end of the control module 3 and the input end of the external device.

[0052] The control module 3 performs analog-to-digital conversion on the analog signal to obtain a digital signal and sends it to an external device through the wireless signal transmission module 5 .

[0053] The power supply module 4 is connected to the preamplifier and filter module 2 and the control module 3 for power supply.

[0054] In the embodiment of the utility model, the wireless signal transmitting module 5 includes at least one Bluetooth signal transmitting unit, wherein the Bluetooth signal transmitting unit is connected to the control module 3, receives the digital signal sent by the control module 3, and sends the digital signal to the external device.

[0055] Specifically, the wireless signal transmitting module 5 can support the control module 3 to communicate wirelessly with the preset host computer, and then after the control module 3 performs relevant processing on the surface electromyography signal it receives, it can send the digital signal obtained by processing the surface electromyography signal to the preset host computer through the wireless signal transmitting module 5, so that the relevant collection personnel can obtain the collected surface electromyography signal through the preset host computer.

[0056] Specifically, the Bluetooth module may be a BLE106 Bluetooth module, where BLE106 is a model. More specifically, the Bluetooth module may be a WH-BLE106 Bluetooth module, which is a model in the BLE106 Bluetooth module series. The BLE106 Bluetooth module has the advantages of low power consumption, high integration and stability.

[0057] like Figure 1 As shown, the control module 3 includes an analog-to-digital converter (ADC), and Ch1 to ChN all represent input channels of the ADC, wherein N represents a positive integer.

[0058] In the embodiment of the utility model, the control module 3 can be a microcontroller based on the ARM Cortex-M4 core. Among them, ARM Cortex-M4 is the model of the ARM Cortex-M4 core. The ARM Cortex-M4 core is integrated with a high-resolution analog-to-digital converter, which can be used for the collection and conversion of multi-channel analog signals.

[0059] In the embodiment of the utility model, the control module 3 can be a STM32F407 microcontroller, wherein STM32F407 is the model of the STM32F407 microcontroller.

[0060] In the embodiment of the utility model, the control module 3 can be a STM32F407VGT6 microcontroller. Among them, STM32F407VGT6 is the model of the STM32F407VGT6 microcontroller. The STM32F407VGT6 microcontroller is a model in the STM32F407 microcontroller series, and they all belong to microcontrollers based on the ARM Cortex-M4 architecture.

[0061] The working principle of the surface electromyography signal collector is as follows: the signal acquisition unit 11 contacts the collected object, collects the surface electromyography signal of the collected object, and sends the collected electrical signal to the corresponding preamplifier and filter unit 21. After the preamplifier and filter unit 21 amplifies and filters the electrical signal, the electrical signal (which is an analog signal) is sent to the corresponding input channel of the ADC, and the ADC performs analog-to-digital conversion on the received electrical signal. In addition, the control module 3 can also perform other processing on the digital signal after the analog-to-digital conversion, such as digital filtering and / or low-pass filtering, and send the processed signal to an external device for storage and display through the wireless signal transmission module 5.

[0062] and Figure 1 The preamplifier and filter unit 21 shown in FIG. Figure 2 This is a circuit diagram of a preamplifier and filter unit disclosed in an embodiment of the utility model. The preamplifier and filter unit 21 is constructed using a chip that integrates an amplifier and a filter. Specifically, a peripheral circuit is set on the periphery of the chip to obtain the preamplifier and filter unit 21. The utility model uses the AD8232 chip as an example for explanation.

[0063] like Figure 2 As shown, the peripheral circuit includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a first capacitor C1, a second capacitor C2 and a third capacitor C3.

[0064] The signal strength of the original sEMG is relatively weak, generally between 10μV and 5mV, and the signal frequency is mainly concentrated below 1kHz, which is a low-frequency signal. It has many interference signals, including interference signals from the body. For example, during the breathing process of the collected object, the muscles in the lungs will contract and relax, which may generate electrical signals, which may interfere with the sEMG. In addition, there are also interference signals from outside the body, such as power frequency interference, line interference, and interference introduced by poor grounding. Therefore, it is necessary to amplify and filter the electrical signals collected by the signal acquisition unit 11.

[0065] The AD8232 chip can accurately amplify and filter the weak electrical signals from the muscles through built-in amplifiers and filters, as well as reference voltage buffers, drive lead front-end reference buffers, right leg drive circuits and other circuits.

[0066] In addition, during the sEMG acquisition process, the object being acquired may capture a 50Hz interference signal from the power line. The RLD pin of the AD8232 chip can establish a reference level that has the same phase and opposite polarity as the 50Hz common-mode interference signal captured by the organism. Therefore, the reference level can offset the 50Hz common-mode interference signal captured by the organism, which is beneficial to improve the accuracy of the surface electromyography signal.

[0067] In this solution, a chip is used to construct a preamplifier and filter unit. Since the amplifier and the filter are integrated in the chip, compared with the solution based on discrete components in the prior art, the preamplifier and filter unit of this solution has the advantages of low power consumption, small size and small signal interference.

[0068] In a specific embodiment, Figure 1 The signal acquisition unit 11 shown corresponds to the signal acquisition unit 11, Figure 3 This is a schematic diagram of PCB wiring of a signal acquisition unit disclosed in an embodiment of the utility model. The signal acquisition unit 11 includes: a first acquisition electrode J1, a second acquisition electrode J2, a reference ground electrode J3 and an interface 31.

[0069] It should be noted that the full name of PCB is Printed Circuit Board, which is printed circuit board.

[0070] The interface 31 is arranged on one side of the printed circuit board, and the first collection electrode J1 , the second collection electrode J2 and the reference ground electrode J3 are plug-in connected to the corresponding preamplification and filtering unit 21 through the interface 31 .

[0071] Specifically, the interface 31 can be a PJ342 audio interface, where PJ342 is the model of the PJ342 audio interface. Since the connection between the interface 31 and the corresponding preamplifier and filter unit 21 is a plug-in active connection, that is, the interface 31 can be inserted into the corresponding preamplifier and filter unit 21, and can also be unplugged from the corresponding preamplifier and filter unit 21. This enables the present solution to unplug the signal acquisition unit 11 from the corresponding preamplifier and filter unit 21 and store it separately, thereby reducing the space occupied by the signal acquisition unit 11, improving the portability of the surface electromyography signal collector, and also improving the operability of the surface electromyography signal collector.

[0072] The first collection electrode J1, the second collection electrode J2 and the reference ground electrode J3 may be bare copper layers, and are in contact with the collected object by attaching gold-plated copper sheet electrodes.

[0073] by Figure 3 Taking the coordinate system in the upper left corner as a reference, the first collection electrode J1, the second collection electrode J2 and the reference ground electrode J3 are distributed in a straight line in the x direction and are distributed parallel to each other in the y direction.

[0074] Preferably, the thickness of the first collection electrode J1, the second collection electrode J2 and the reference ground electrode J3 can be greater than or equal to 0.5 mm and less than or equal to 0.7 mm, and in order to ensure the strength of the electrical signal to a certain extent, the area of ​​the copper coating is not less than 1 cm 2 .

[0075] For example, the size of the copper clad layer may be 14 mm*7 mm. Also, the size of the PCB board where the first collection electrode J1, the second collection electrode J2 and the reference ground electrode J3 are located may be 23 mm*35 mm, and the size of the interface 31 may be 13.5 mm*13 mm.

[0076] In terms of working principle, the reference ground electrode J3 is used as a common reference ground, and the first acquisition electrode J1 and the second acquisition electrode J2 are used as two acquisition terminals of electromyographic signals, and the acquired differential voltage signals are sent to the corresponding preamplifier and filter unit 21. Due to the use of differential signal input technology and the introduction of the reference ground electrode, this solution can reduce noise interference and improve the ability to suppress common mode interference.

[0077] In the embodiment of the utility model, in order to increase the structural strength of the first collection electrode J1, the second collection electrode J2 and the reference ground electrode J3 and make them more durable and reliable, a wiring enhancement process can be implemented on the electrodes when producing the electrodes. Specifically, additional materials for enhancing the structural strength can be introduced into the electrodes, or other processing technologies can be used, as long as the wiring part of the electrode can be enhanced to make the electrode have higher strength and durability.

[0078] Figure 1 The power supply module 4 shown includes: a power supply unit, a first linear voltage stabilizing unit and a second linear voltage stabilizing unit.

[0079] The power supply unit is connected to the preamplifier and filter module 2 through the first linear voltage stabilizing unit for power supply, and is connected to the control module 3 through the second linear voltage stabilizing unit for power supply.

[0080] like Figure 4 , which is a circuit structure diagram of a power supply unit disclosed in an embodiment of the utility model, specifically includes: an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a BL4056 chip, a battery E, a field effect transistor MOS, a first diode D1, a second diode D2 and a third diode D3. The battery E is specifically a rechargeable battery, and the battery E can specifically be a lithium battery.

[0081] Among them, the BL4056 chip can specifically be a BL4056C chip, and more specifically, the BL4056C chip can be a BL4056C-42ES chip, wherein BL4056, BL4056C and BL4056C-42ES are all models, the BL4056C chip is a model in the BL4056 chip series, and the BL4056C-42ES chip is a model in the BL4056 chip series.

[0082] The BL4056C-42ES chip is a single-cell lithium-ion battery management chip, which is mainly used for battery charging control. In this solution, the BL4056 chip is used to manage the charge and discharge of the battery E, and is connected to the first diode D1 through its charging status indication terminal CHRG#, and is connected to the second diode D2 through its battery charging completion indication output terminal STDBY#, so that when charging the battery E, the first diode D1 is in a lighted state, and after the battery E is fully charged, the second diode D2 is in a lighted state. In order to enable the user to distinguish the different charging states of the battery E, the light emitted by the first diode D1 and the second diode D2 is different.

[0083] The BL4056 chip can also realize charging the battery E directly using the USB data line without shutting down the computer. The output of the battery E is respectively sent to the first linear voltage regulator unit and the second linear voltage regulator unit. Both of the two linear voltage regulator units can be low dropout linear regulator (LDO) chips.

[0084] This solution realizes the isolation of analog and digital power supply by setting two linear voltage stabilizing units to supply power to the preamplifier and filter module 2 and the control module 3 respectively, so that the utility model further reduces the noise of sEMG signal and improves the quality of sEMG signal.

[0085] A surface electromyography signal collector based on the above-mentioned embodiment of the utility model includes: a signal acquisition module, a preamplifier and filter module, a control module, a power supply module and a wireless signal transmission module. The signal acquisition module includes at least one signal acquisition unit, and the preamplifier and filter module includes at least one preamplifier and filter unit; the preamplifier and filter unit is constructed using a chip that integrates an amplifier and a filter; the input end of the signal acquisition unit contacts the object to be measured to collect surface electromyography signals, and the output end of the signal acquisition unit is connected to the input end of the preamplifier and filter unit in a one-to-one plug-in manner; the output end of the preamplifier and filter unit is connected to the input end of the control module; the wireless signal transmission module is connected to the output end of the control module and the input end of the external device; the power supply module is connected to the preamplifier and filter module and the control module for power supply. In the present solution, a preamplifier and filter unit is constructed using a chip. Since the amplifier and the filter are integrated in the chip, the preamplifier and filter unit has the advantages of low power consumption, small size and low signal interference. In addition, the signal acquisition unit and the preamplifier and filter unit are connected in a detachable manner, which can be disassembled when not in use to reduce the size. In summary, the surface electromyography signal collector of the present application has the advantages of low power consumption, small size and high accuracy of the acquisition results.

[0086] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0087] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present utility model.

[0088] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A surface electromyography signal collector, characterized in that: include: A signal acquisition module (1), a preamplification and filtering module (2), a control module (3), a power supply module (4) and a wireless signal transmission module (5); The signal acquisition module (1) comprises at least one signal acquisition unit (11); The preamplifier and filter module (2) comprises at least one preamplifier and filter unit (21); the preamplifier and filter unit (21) is constructed using a chip integrating an amplifier and a filter; The signal acquisition unit (11) is arranged on a printed circuit board, the input end of the signal acquisition unit (11) contacts the object to be measured to collect surface electromyographic signals, the output end of the signal acquisition unit (11) is connected to the input end of the preamplifier and filter unit (21) in a one-to-one plug-in manner, and the surface electromyographic signals are sent to the preamplifier and filter unit (21); The output end of the preamplifier and filter unit (21) is connected to the input end of the control module (3); the preamplifier and filter unit (21) amplifies and filters the surface electromyography signal to obtain an analog signal and sends it to the control module (3); The wireless signal transmission module (5) is connected to the output end of the control module (3) and the input end of the external device; The control module (3) performs analog-to-digital conversion on the analog signal to obtain a digital signal and sends the digital signal to the external device through the wireless signal transmission module (5); The power supply module (4) is connected to the preamplification and filtering module (2) and the control module (3) for power supply.

2. The surface electromyography signal collector according to claim 1, characterized in that: The signal acquisition unit (11) comprises: a first acquisition electrode, a second acquisition electrode, a reference ground electrode and an interface; The first surface of the first collecting electrode, the first surface of the second collecting electrode and the first surface of the reference grounding electrode are in contact with the collected object by pasting gold-plated copper sheet electrodes; The first collecting electrode, the second collecting electrode and the reference grounding electrode are arranged in a straight line and in parallel on the printed circuit board; The interface is arranged on one side of the printed circuit board, and the first collection electrode, the second collection electrode and the reference ground electrode are plug-in connected to the input end of the corresponding preamplification and filtering unit (21) through the interface.

3. The surface electromyography signal collector according to claim 2, characterized in that: The first collecting electrode, the second collecting electrode and the reference grounding electrode are all flexible dry electrodes.

4. The surface electromyography signal collector according to claim 2, characterized in that: The first collecting electrode, the second collecting electrode and the reference grounding electrode are all between 0.5 mm and 0.7 mm thick and have an area greater than 1 cm 2 Bare copper layer.

5. The surface electromyography signal collector according to claim 2, characterized in that: A shielding layer is disposed on a second surface opposite to the first surface of the first collection electrode, the first surface of the second collection electrode, and the first surface of the reference ground electrode.

6. The surface electromyography signal collector according to claim 1, characterized in that: The power supply module (4) comprises a power supply unit, a first linear voltage stabilizing unit and a second linear voltage stabilizing unit; The power supply unit is connected to the preamplifier and filter module (2) through the first linear voltage regulator unit for power supply, and is connected to the control module through the second linear voltage regulator unit for power supply.

7. The surface electromyography signal collector according to claim 1, characterized in that: The wireless signal transmission module includes at least one Bluetooth signal transmission unit; The Bluetooth signal transmitting unit is connected to the output end of the control module (3) and the input end of the external device, and transmits the digital signal output by the control module (3) to the external device.

8. The surface electromyography signal collector according to claim 1, characterized in that: The chip integrating the amplifier and the filter includes the AD8232 chip.

9. The surface electromyography signal collector according to claim 1, characterized in that: The control module (3) comprises: a microcontroller based on an ARM Cortex-M4 core.

10. The surface electromyography signal collector according to any one of claims 1 to 9, characterized in that: The number of the signal acquisition units (11) and the number of the preamplification and filtering units (21) are both between 8 and 12, and the number of the signal acquisition units (11) and the number of the preamplification and filtering units (21) are the same.

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