Bioelectric signal acquisition equipment capable of preventing electrode from falling off

Abstract

The invention discloses bio-electricity signal acquisition equipment capable of preventing an electrode from falling off, and relates to the technical field of bio-electricity signal acquisition. The equipment comprises an equipment body, an electrode assembly, a circuit board and an electrode assembly downward movement driving mechanism, an electrode assembly through hole is formed in a bottom plate of the equipment body, the electrode assembly is embedded in the through hole and can move up and down, an electrode falling monitoring circuit and a control circuit are arranged on the circuit board, and the driving mechanism is located above the electrode assembly. The control circuit is used for controlling the driving mechanism to drive the electrode assembly to move downwards when the monitoring circuit finds that the electrode assembly falls off, and the control circuit stops until the electrode assembly does not fall off, so that the purpose of preventing the electrode from falling off can be achieved, the signal stability and the equipment reliability are improved, and the service life is prolonged. And the user experience is enhanced, the equipment use scene is expanded, and practical application and popularization are facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of bioelectric signal collection, and in particular relates to a bioelectric signal collection device capable of preventing electrodes from falling off. Background Art

[0002] In modern health monitoring equipment, electromyogram (EMG, which refers to the muscle bioelectricity graph recorded by an electromyograph) signal acquisition is very important. It can help monitor the electrical activity of muscles, thereby evaluating muscle function or providing rehabilitation treatment.

[0003] At present, existing EMG acquisition devices usually rely on electrodes that are attached to the skin, and these electrodes may fall off during long-term use or exercise. Electrode detachment will lead to inaccurate signal acquisition, affecting the validity of the data and the overall performance of the device. Therefore, how to develop a new bioelectric signal acquisition device that can monitor whether the electrode falls off in real time and take measures to prevent the electrode from falling off is a topic that technicians in this field urgently need to study. Summary of the invention

[0004] The purpose of the present invention is to provide a bioelectric signal acquisition device that prevents electrodes from falling off, so as to solve the problem that the electrodes of existing bioelectric signal acquisition devices may fall off during long-term use or exercise, thereby affecting the data validity and the overall performance of the device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, a bioelectric signal acquisition device for preventing electrode shedding is provided, comprising a device body, an electrode assembly, a circuit board and a downward driving mechanism for the electrode assembly, wherein an electrode assembly through hole is provided on a bottom plate of the device body, the electrode assembly is embedded in the electrode assembly through hole and can move up and down, the circuit board is installed inside the device body and is provided with an electrode shedding monitoring circuit and a control circuit, and the downward driving mechanism for the electrode assembly is also installed inside the device body and is located above the electrode assembly;

[0007] The electrode shedding monitoring circuit is connected to the electrode assembly and the control circuit respectively, and is used to monitor in real time whether the electrode assembly is shedding, and transmit the monitoring result to the control circuit in real time;

[0008] The control circuit is connected to the controlled end of the electrode assembly downward driving mechanism, and is used to control the electrode assembly downward driving mechanism to drive the electrode assembly to move downward when the monitoring result indicates that the electrode assembly has fallen off, and stop when the monitoring result indicates that the electrode assembly has not fallen off.

[0009] Based on the above invention content, a new bioelectric signal acquisition scheme is provided, which can monitor in real time whether the electrode has fallen off and take measures to prevent the electrode from falling off, namely, it includes a device body, an electrode assembly, a circuit board and a downward driving mechanism for the electrode assembly, wherein an electrode assembly through hole is opened on the bottom plate of the device body, the electrode assembly is embedded in the through hole and can move up and down, the circuit board is arranged with an electrode falling off monitoring circuit and a control circuit, the driving mechanism is located above the electrode assembly, and the control circuit is used to control the driving mechanism to drive the electrode assembly to move downward when the monitoring circuit finds that the electrode assembly has fallen off, and stops when it is monitored that the electrode assembly has not fallen off. In this way, the purpose of preventing the electrode from falling off can be achieved, the signal stability and device reliability can be improved, and the user experience can be enhanced and the device usage scenarios can be expanded, which is convenient for practical application and promotion.

[0010] In a possible design, the electrode assembly includes a grounding electrode and at least one bioelectric signal collection electrode.

[0011] In a possible design, all electrode sheets in the electrode assembly are arranged in an annular arrangement or a rectangular arrangement.

[0012] In a possible design, both ends of each electrode sheet in the electrode assembly are provided with a limiting plate for preventing the entire electrode sheet from passing downward through the through hole of the electrode assembly by cooperating with the bottom plate.

[0013] In a possible design, an elastic member is provided between the limiting plate and the bottom plate.

[0014] In a possible design, each electrode sheet in the electrode assembly is respectively configured with an electrode assembly downward movement driving mechanism in a one-to-one correspondence.

[0015] In one possible design, the electrode assembly downward drive mechanism includes a stepper motor and a disc cam, wherein the stepper motor is horizontally installed inside the device body, and the disc cam is installed on the output shaft of the stepper motor, and the outer peripheral surface of the disc cam contacts the top surface of the corresponding electrode sheet.

[0016] In one possible design, the electrode detachment monitoring circuit includes an electrode connection terminal, a first resistor, a second resistor, a voltage comparator and a digital-to-analog converter, wherein the electrode connection terminal is connected to one end of the first resistor, the other end of the first resistor is respectively connected to one end of the second resistor and the positive input terminal of the voltage comparator, the other end of the second resistor is grounded, the negative input terminal of the voltage comparator is connected to the output terminal of the digital-to-analog converter, the output terminal of the voltage comparator is used to connect to the input terminal of the control circuit, and the input terminal of the digital-to-analog converter is used to connect to the output terminal of the control circuit, so as to output a threshold voltage for voltage comparison under the control of the control circuit.

[0017] In a possible design, when the device body adopts a wristwatch structure, the bioelectric signal acquisition device also includes a wristband installed on the device body.

[0018] In a possible design, the bioelectric signal acquisition device also includes a battery and a touch panel, wherein the battery is also installed inside the device body and supplies power to the circuit board and the electrode assembly downward drive mechanism respectively, and the touch panel is embedded in the top surface of the device body and connected to the circuit board.

[0019] Beneficial effects of the above scheme:

[0020] (1) The present invention provides a novel bioelectric signal acquisition scheme that can monitor in real time whether an electrode has fallen off and take measures to prevent the electrode from falling off, namely, it includes a device body, an electrode assembly, a circuit board and a downward driving mechanism for the electrode assembly, wherein an electrode assembly through hole is provided on the bottom plate of the device body, the electrode assembly is embedded in the through hole and can move up and down, the circuit board is provided with an electrode falling off monitoring circuit and a control circuit, the driving mechanism is located above the electrode assembly, and the control circuit is used to control the driving mechanism to drive the electrode assembly to move downward when the monitoring circuit finds that the electrode assembly has fallen off, until it stops when it is detected that the electrode assembly has not fallen off, thereby preventing the electrode from falling off, improving signal stability and device reliability, and enhancing user experience and expanding device usage scenarios, which is convenient for practical application and promotion;

[0021] (2) It can improve signal stability, that is, by real-time monitoring of electrode status and automatic electrode ejection, the stability and accuracy of EMG signals can be significantly improved;

[0022] (3) It can enhance the user experience, that is, users do not need to manually replace electrodes, which reduces the complexity of operation and improves the convenience of use;

[0023] (4) It can improve the reliability of the device. That is, the function of automatically ejecting the electrode can ensure the continuous stability of the device in long-term use and avoid data loss or device failure caused by electrode detachment;

[0024] (5) The application scenarios can be expanded, that is, it can be applied to various wearable devices that require stable EMG signals, such as sports monitoring watches or medical monitoring watches. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention 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 described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a bioelectric signal acquisition device that prevents electrodes from falling off provided in an embodiment of the present invention.

[0027] Figure 2 A schematic diagram of the positional relationship between an electrode sheet and an electrode assembly downward driving mechanism in a bioelectric signal acquisition device provided by an embodiment of the present invention.

[0028] Figure 3 A schematic diagram of the structure of an electrode detachment monitoring circuit in a bioelectric signal acquisition device provided in an embodiment of the present invention.

[0029] In the above drawings: 1-device body; 11-bottom plate; 21-ground electrode sheet; 22-bioelectric signal collection electrode sheet; 23-limiting plate; 24-elastic member; 41-stepping motor; 42-disc cam; 5-wristband. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structures of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these embodiments without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0031] It should be understood that although the terms first and second, etc. may be used herein to describe various objects, these objects should not be limited by these terms. These terms are only used to distinguish one object from another object. For example, a first object can be referred to as a second object, and similarly, a second object can be referred to as a first object without departing from the scope of the exemplary embodiments of the present invention.

[0032] It should be understood that the term "and / or" that may appear in this document is merely a description of the association relationship between associated objects, indicating that there may be three relationships. For example, A and / or B can indicate three situations: A exists alone, B exists alone, or A and B exist at the same time. For another example, A, B and / or C can indicate the existence of any one of A, B and C or any combination of them. The term " / and" that may appear in this document describes another type of association object relationship, indicating that there may be two relationships. For example, A / and B can indicate two situations: A exists alone or A and B exist at the same time. In addition, the character " / " that may appear in this document generally indicates that the previous and next associated objects are in an "or" relationship.

[0033] Example

[0034] like Figures 1 to 3 As shown, the bioelectric signal acquisition device for preventing electrode detachment provided in this embodiment includes but is not limited to a device body 1, an electrode assembly, a circuit board and a downward driving mechanism for the electrode assembly, wherein an electrode assembly through hole is opened on the bottom plate 11 of the device body 1, the electrode assembly is embedded in the electrode assembly through hole and can move up and down, the circuit board is installed inside the device body 1 and is arranged with an electrode detachment monitoring circuit and a control circuit, and the electrode assembly downward driving mechanism is also installed inside the device body 1 and is located above the electrode assembly; the electrode detachment monitoring circuit is respectively connected to the electrode assembly and the control circuit, and is used to monitor in real time whether the electrode assembly has detached, and transmit the monitoring result to the control circuit in real time; the control circuit is connected to the controlled end of the electrode assembly downward driving mechanism, and is used to control the electrode assembly downward driving mechanism to drive the electrode assembly to move downward when the monitoring result indicates that the electrode assembly has detached, until it stops when the monitoring result indicates that the electrode assembly has not detached.

[0035] like Figure 1As shown, in the specific structure of the bioelectric signal acquisition device, the device body 1 can be, but is not limited to, a wristwatch structure, so that when the device body 1 is worn, the base plate 11 and the electrode assembly can fit the surface of the wrist skin, thereby enabling the electrode assembly to acquire bioelectric signals such as EMG signals. The electrode assembly is used to acquire bioelectric signals in real time, and transmit the acquisition results to the processing circuit in the circuit board in real time for data processing and analysis (the specific data processing and analysis method of the aforementioned processing circuit is the prior art, and the results will be output for display or transmitted to an external device; in order to reduce the size of the circuit board, the aforementioned processing circuit will generally be integrated into one circuit with the control circuit); specifically, the electrode assembly will include a grounding electrode sheet 21 and at least one bioelectric signal acquisition electrode sheet 22, such as Figure 1 and Figure 2 As shown, for example, there is a grounding electrode sheet 21 and two bioelectric signal collection electrode sheets 22, each of which can move up and down in the through hole of the electrode assembly. The arrangement of all the electrode sheets in the electrode assembly can be adjusted as needed to meet different biosignal collection requirements; specifically, all the electrode sheets in the electrode assembly can be arranged in intervals in a circular arrangement or a rectangular arrangement, but not limited to, such as Figure 1 and Figure 2 As shown, a circular arrangement is specifically adopted for the interval arrangement. Since the human skin surface is located below the bottom plate 11 and the electrode assembly, when the electrode is found to be falling off, the electrode assembly can be driven to move downward so that the electrode assembly can be close to and fit the human skin surface again, thereby achieving the purpose of preventing the electrode from falling off. In addition, the control circuit can be specifically implemented by a conventional MCU (Microcontroller Unit) chip and its peripheral circuits.

[0036] Based on the detailed description of the above-mentioned bioelectric signal acquisition device, it can be known that the present embodiment provides a new bioelectric signal acquisition scheme that can monitor in real time whether the electrode has fallen off and take measures to prevent the electrode from falling off, that is, it includes a device body, an electrode assembly, a circuit board and an electrode assembly downward driving mechanism, wherein an electrode assembly through hole is opened on the bottom plate of the device body, the electrode assembly is embedded in the through hole and can move up and down, the circuit board is arranged with an electrode falling off monitoring circuit and a control circuit, the driving mechanism is located above the electrode assembly, and the control circuit is used to control the driving mechanism to drive the electrode assembly to move downward when the monitoring circuit finds that the electrode assembly has fallen off, until it stops when it is monitored that the electrode assembly has not fallen off. In this way, the purpose of preventing the electrode from falling off can be achieved, the signal stability and device reliability can be improved, and the user experience can be enhanced and the device usage scenarios can be expanded, which is convenient for practical application and promotion.

[0037] Preferably, at both ends of each electrode sheet in the electrode assembly, there are respectively provided a stopper plate 23 for preventing the entire electrode sheet from passing downward through the through hole of the electrode assembly by cooperating with the bottom plate 11. Figure 2 As shown, the setting of the limit plate 23 can prevent the electrode sheet from being separated from the device body 1 due to excessive downward movement. Further preferably, in order to achieve the purpose of automatic reset and upward movement of the electrode sheet, an elastic member 24 is provided between the limit plate 23 and the bottom plate 11; Figure 2 As shown, the elastic member 24 can be specifically a spring, so that when the electrode assembly downward driving mechanism removes the driving action, the elastic potential energy accumulated due to compression can be used to enable the electrode sheet to automatically return to its original position and move upward.

[0038] Preferably, each electrode sheet in the electrode assembly 2 is respectively configured with one electrode assembly downward movement driving mechanism. Figure 2 As shown, different electrode assembly downward driving mechanisms are respectively configured for three different electrode sheets, so that corresponding and independent anti-falling operations can be performed for each electrode sheet through the electrode assembly downward driving mechanism based on the corresponding and independent falling-off monitoring results. Specifically, the electrode assembly downward driving mechanism includes but is not limited to a stepper motor 41 and a disc cam 42, wherein the stepper motor 41 is horizontally installed inside the device body 1, and the disc cam 42 is installed on the output shaft of the stepper motor 41, and the outer peripheral surface of the disc cam 42 contacts the top surface of the corresponding electrode sheet. Since the disc cam 42 is a disc-shaped component that rotates around a fixed axis and has a variable diameter, the variable diameter characteristic can be used to drive the corresponding electrode sheet to move downward during the process of being driven to rotate by the stepper motor 41, thereby achieving the purpose of anti-falling. In addition, if the disc cam 42 is rotated in the opposite direction or after rotating 360 degrees, the driving effect can be removed so that the corresponding electrode sheet can automatically reset and move upward.

[0039] Preferably, the electrode detachment monitoring circuit includes but is not limited to an electrode connection terminal, a first resistor R1, a second resistor R2, a voltage comparator U1 and a digital-to-analog converter U2, wherein the electrode connection terminal is connected to one end of the first resistor R1, the other end of the first resistor R1 is respectively connected to one end of the second resistor R2 and the positive input terminal of the voltage comparator U1, the other end of the second resistor R2 is grounded, the negative input terminal of the voltage comparator U1 is connected to the output terminal of the digital-to-analog converter U2, the output terminal of the voltage comparator U1 is used to connect to the input terminal of the control circuit, and the input terminal of the digital-to-analog converter U2 is used to connect to the output terminal of the control circuit, so as to output a threshold voltage for voltage comparison under the control of the control circuit. Figure 3As shown, the working principle of the electrode shedding monitoring circuit is as follows: the electrode sheet forms a voltage signal with the skin through a resistor, and when the electrode sheet is in poor contact with the skin, the voltage signal will change, so that it can be judged whether the electrode has fallen off by voltage comparison: when the voltage of the voltage signal is lower than the threshold voltage, it is judged that the electrode has fallen off (at this time, the voltage comparator outputs a high-level signal), otherwise it is judged that the electrode has not fallen off (at this time, the voltage comparator outputs a low-level signal), so that the control circuit can identify whether the electrode assembly has fallen off through different level input conditions. In addition, the voltage comparator U1 and the digital-to-analog converter U2 can be conventionally implemented using existing devices.

[0040] Preferably, when the device body 1 adopts a wristwatch structure, the bioelectric signal acquisition device further includes a wristband 5 installed on the device body 1. Figure 1 As shown, the length and width of the wristband 5 can be adjusted by means of a buckle, a sliding clip or a zipper to adapt to the wrist or other wearing parts of different users. The fixing method of the wristband 5 can be achieved by adjusting the buckle or Velcro to ensure the stability of the wristband when worn and can be quickly adjusted. In addition, the wristband 5 can be made of soft and breathable materials, such as silicone or nylon fabric. The soft and bendable material can make it more comfortable to wear and fit the wrist better.

[0041] Preferably, the bioelectric signal acquisition device also includes a battery and a touch panel, wherein the battery is also installed inside the device body 1 and supplies power to the circuit board and the electrode assembly downward drive mechanism respectively, and the touch panel is embedded in the top surface of the device body 1 and connected to the circuit board to display the data processing and analysis results of the bioelectric signal.

[0042] In summary, the bioelectric signal acquisition device provided by this embodiment has the following technical effects:

[0043] (1) This embodiment provides a novel bioelectric signal acquisition solution that can monitor in real time whether an electrode has fallen off and take measures to prevent the electrode from falling off, namely, it includes a device body, an electrode assembly, a circuit board and a downward driving mechanism for the electrode assembly, wherein an electrode assembly through hole is provided on the bottom plate of the device body, the electrode assembly is embedded in the through hole and can move up and down, the circuit board is arranged with an electrode falling off monitoring circuit and a control circuit, the driving mechanism is located above the electrode assembly, and the control circuit is used to control the driving mechanism to drive the electrode assembly to move downward when the monitoring circuit finds that the electrode assembly has fallen off, until it stops when it is detected that the electrode assembly has not fallen off, thereby preventing the electrode from falling off, improving signal stability and device reliability, and enhancing user experience and expanding device usage scenarios, which is convenient for practical application and promotion;

[0044] (2) It can improve signal stability, that is, by real-time monitoring of electrode status and automatic electrode ejection, the stability and accuracy of EMG signals can be significantly improved;

[0045] (3) It can enhance the user experience, that is, users do not need to manually replace electrodes, which reduces the complexity of operation and improves the convenience of use;

[0046] (4) It can improve the reliability of the device. That is, the function of automatically ejecting the electrode can ensure the continuous stability of the device in long-term use and avoid data loss or device failure caused by electrode detachment;

[0047] (5) The application scenarios can be expanded, that is, it can be applied to various wearable devices that require stable EMG signals, such as sports monitoring watches or medical monitoring watches.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bioelectric signal acquisition device that prevents electrodes from falling off, characterized in that: The device comprises a device body (1), an electrode assembly, a circuit board and an electrode assembly downward movement driving mechanism, wherein an electrode assembly through hole is provided on a bottom plate (11) of the device body (1), the electrode assembly is embedded in the electrode assembly through hole and can move up and down, the circuit board is installed inside the device body (1) and is provided with an electrode fall-off monitoring circuit and a control circuit, and the electrode assembly downward movement driving mechanism is also installed inside the device body (1) and is located above the electrode assembly; The electrode shedding monitoring circuit is connected to the electrode assembly and the control circuit respectively, and is used to monitor in real time whether the electrode assembly is shedding, and transmit the monitoring result to the control circuit in real time; The control circuit is connected to the controlled end of the electrode assembly downward driving mechanism, and is used to control the electrode assembly downward driving mechanism to drive the electrode assembly to move downward when the monitoring result indicates that the electrode assembly has fallen off, and stop when the monitoring result indicates that the electrode assembly has not fallen off.

2. The bioelectric signal acquisition device according to claim 1, characterized in that: The electrode assembly comprises a grounding electrode sheet (21) and at least one bioelectric signal collection electrode sheet (22).

3. The bioelectric signal acquisition device according to claim 2, characterized in that: All electrode sheets in the electrode assembly are arranged at intervals in a ring arrangement or a rectangular arrangement.

4. The bioelectric signal acquisition device according to claim 2, characterized in that: Both ends of each electrode sheet in the electrode assembly are provided with a limiting plate (23) for preventing the entire electrode sheet from passing downward through the through hole of the electrode assembly by cooperating with the bottom plate (11).

5. The bioelectric signal acquisition device according to claim 4, characterized in that: An elastic member (24) is provided between the limiting plate (23) and the bottom plate (11).

6. The bioelectric signal acquisition device according to claim 2, characterized in that: Each electrode sheet in the electrode assembly (2) is respectively and one-to-one configured with an electrode assembly downward movement driving mechanism.

7. The bioelectric signal acquisition device according to claim 6, characterized in that: The electrode assembly downward driving mechanism comprises a stepping motor (41) and a disc cam (42), wherein the stepping motor (41) is horizontally installed inside the device body (1), and the disc cam (42) is installed on the output shaft of the stepping motor (41), and the outer peripheral surface of the disc cam (42) contacts the top surface of the corresponding electrode sheet.

8. The bioelectric signal acquisition device according to claim 1, characterized in that: The electrode detachment monitoring circuit comprises an electrode connection end, a first resistor (R1), a second resistor (R2), a voltage comparator (U1) and a digital-to-analog converter (U2), wherein the electrode connection end is connected to one end of the first resistor (R1), the other end of the first resistor (R1) is respectively connected to one end of the second resistor (R2) and the positive input end of the voltage comparator (U1), the other end of the second resistor (R2) is grounded, the negative input end of the voltage comparator (U1) is connected to the output end of the digital-to-analog converter (U2), the output end of the voltage comparator (U1) is used to connect to the input end of the control circuit, and the input end of the digital-to-analog converter (U2) is used to connect to the output end of the control circuit, so as to output a threshold voltage for voltage comparison under the control of the control circuit.

9. The bioelectric signal acquisition device according to claim 1, characterized in that: When the device body (1) adopts a wristwatch structure, the bioelectric signal acquisition device further comprises a wristband (5) mounted on the device body (1).

10. The bioelectric signal acquisition device according to claim 1, characterized in that: The bioelectric signal acquisition device also includes a battery and a touch panel, wherein the battery is also installed inside the device body (1) and supplies power to the circuit board and the electrode assembly downward driving mechanism respectively, and the touch panel is embedded in the top surface of the device body (1) and connected to the circuit board.

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