Biological electrical signal detection device, detection method and electrode detection circuit thereof

Abstract

This invention discloses a bioelectrical signal detection device, detection method, and electrode detection circuit, relating to the field of electrical signal detection technology. The electrode detection circuit of the bioelectrical signal detection module includes a skin conductance detection circuit and a neural conductance detection circuit. The skin conductance detection circuit includes a skin conductance response chip and a skin conductance response electrode group. The positive and negative electrodes of the skin conductance response are each connected to the skin conductance response chip through a first branch. The neural conductance detection circuit includes a neural conductance chip and a neural conductance electrode group. Two positive and two negative neural conductance electrodes are each connected to the neural conductance chip through a second branch. Each second branch is equipped with a first switch, and multiple first switches are each connected to the skin conductance response chip through a third branch. This invention utilizes the cooperation of the third branches and the first switches to use the positive and negative electrodes of the neural conductance signal for skin conductance response signal detection, improving the accuracy of judging the user's physiological state information.

Description

Technical Field

[0001] This invention relates to the field of electrical signal detection technology, and in particular to a bioelectrical signal detection device, detection method, and electrode detection circuit. Background Technology

[0002] Bioelectrical signal detection, such as skin conductance (GSR) and electrical nerve or muscle signals (ENG), is widely used in the medical field to assist in the diagnosis of neurological diseases, assess psychological stress levels, monitor muscle function, and evaluate the effectiveness of rehabilitation treatments. These signals can obtain real-time information about the human body's physiological state in a non-invasive or minimally invasive manner, providing doctors with important physiological and pathological evidence.

[0003] In the electrode detection circuits of existing bioelectric signal detection devices, there are usually multiple different electrodes to detect different bioelectric signals. However, for wearable bioelectric signal detection devices, the design space of the electrodes is limited. Therefore, the electrode area available for detecting each type of bioelectric signal is limited, resulting in an insufficient number of bioelectric signals collected. This leads to insufficient accuracy in judging the user's physiological state information through bioelectric signals. Summary of the Invention

[0004] The main objective of this invention is to propose a bioelectric signal detection device, detection method, and electrode detection circuit, aiming to solve the problem that the number of bioelectric signals collected in the prior art is insufficient, resulting in insufficient accuracy in judging the user's physiological state information through bioelectric signals.

[0005] To achieve the above objectives, the present invention proposes an electrode detection circuit for a bioelectric signal detection device, comprising:

[0006] A skin conductance detection circuit, comprising a skin conductance response chip and a skin conductance response electrode group, wherein the skin conductance response electrode group comprises a skin conductance response positive electrode and a skin conductance response negative electrode, and the skin conductance response positive electrode and the skin conductance response negative electrode are each connected to the skin conductance response chip through a first branch;

[0007] A neural electrical detection circuit, comprising a neural electrical chip and a neural electrical electrode group, wherein the neural electrical electrode group comprises two positive neural electrodes and two negative neural electrodes, and each of the two positive neural electrodes and the two negative neural electrodes is connected to the neural electrical chip through a second branch;

[0008] Each of the second branches is provided with a first switch, and each of the first switches is connected to the skin conductance response chip through a third branch. Each first switch can control the on / off state of its corresponding second branch and the third branch.

[0009] In one embodiment, the electrode detection circuit further includes two backup electrodes, each backup electrode being connected to the skin conductance chip via a fourth branch, and each fourth branch being provided with a second switch, each second switch being able to control the on / off state of the corresponding fourth branch.

[0010] In one embodiment, each of the plurality of second switches is connected to the ground electrode through a fifth branch, and each second switch can control the on / off state of the corresponding fifth branch.

[0011] In one embodiment, both the first switch and the second switch are analog switches.

[0012] The present invention also provides a bioelectric signal detection device, which applies the above-mentioned electrode detection circuit; the skin electroreaction electrode group is used to contact the skin and detect skin electroreaction signals, and send the detected skin electroreaction signals to the skin electroreaction chip; the neural electroreaction electrode group is used to contact the skin and detect neural electrical signals, and send the detected neural electrical signals to the neural electrical chip.

[0013] The present invention also provides a bioelectric signal detection method, applied to the above-mentioned bioelectric signal detection device, the bioelectric signal detection method comprising the following steps:

[0014] The bioelectric signal detection device is attached to the user's skin;

[0015] Acquire the user's skin conductance response signal;

[0016] Acquire the user's neural electrical signals.

[0017] In one embodiment, the step of acquiring the user's skin conductance response signal includes:

[0018] By disconnecting the corresponding third branch through each of the first switches, the skin electroreaction chip is disconnected from each of the positive and negative nerve electrodes.

[0019] The user's electrodermal response (EDR) signal is obtained through the positive and negative electrodes of the EDR.

[0020] In one embodiment, the step of acquiring the user's skin conductance response signal includes:

[0021] By turning on the corresponding third branch and disconnecting the corresponding second branch through each of the first switches, the skin electroreaction chip is connected to each of the positive and negative nerve electrodes.

[0022] The user's skin conductance signal is obtained through the positive electrode of the skin conductance response, the negative electrode of the skin conductance response, each of the positive electrodes of the nerve conductance response, and each of the negative electrodes of the nerve conductance response.

[0023] In one embodiment, the electrode detection circuit further includes two backup electrodes, each of which is connected to the skin conductance chip via a fourth branch, and each of the fourth branches is provided with a second switch;

[0024] The steps for obtaining the user's skin conductance response signal include:

[0025] By turning on the corresponding third branch and disconnecting the corresponding second branch through each of the first switches, the skin electroreaction chip is connected to each of the positive and negative nerve electrodes.

[0026] By turning on the corresponding fourth branch through each of the second switches, the skin electroreaction chip is connected to each of the backup electrodes;

[0027] The user's skin conductance signal is acquired through the positive electrode of the skin conductance response, the negative electrode of the skin conductance response, each of the backup electrodes, each of the positive and negative electrodes of the nerve conductance response.

[0028] In one embodiment, the electrode detection circuit further includes two backup electrodes, each backup electrode being connected to the skin conductance chip via a fourth branch, and each fourth branch being provided with a second switch, the second switch being connected to the ground via a fifth branch;

[0029] The steps for obtaining the user's skin conductance response signal include:

[0030] By disconnecting the corresponding third branch and connecting the corresponding second branch through each of the first switches, the skin electroreaction chip is disconnected from each of the positive and negative nerve electrodes, and the nerve electrode chip is connected to each of the positive and negative nerve electrodes.

[0031] By disconnecting the corresponding fourth branch and connecting the corresponding fifth branch through each second switch, the spare electrode is connected to the ground electrode.

[0032] The user's electrodermal response signal is obtained through the positive and negative electrodes of the electrodermal response.

[0033] The steps for acquiring the user's neural electrical signals include:

[0034] The user's neural electrical signals are acquired through each of the aforementioned positive and negative neural electrodes.

[0035] In the technical solution of this invention, the positive and negative electrodes of the skin electroreaction (TEF) response are connected to the TEF chip via a first branch, allowing the TEF signals detected by the positive and negative electrodes to be directly sent to the TEF chip. A second branch connects the positive and negative electrodes of the neural electrical system to the neural electrical chip. A first switch is installed on the second branch and connected to the TEF chip via a third branch. The first switch switches the on / off states of the second and third branches. When the second branch is on and the third branch is off, the positive and negative electrodes of the neural electrical system send the detected neural electrical signals to the neural electrical chip. When the second branch is off and the third branch is on, both the positive and negative electrodes of the neural electrical system are used to detect skin reaction electrical signals for the TEF chip. This design allows the neural electrical signals to be used for TEF signal detection when they are not needed, significantly increasing the electrode area for collecting TEF signals, thereby greatly improving the acquisition capability and signal quality of TEF signals, and enhancing the quantity and stability of the signals. Especially in wearable applications under long-term, dynamic environments, this design effectively alleviates the problem of signal loss or quality degradation caused by insufficient electrode area, thereby providing a more sufficient and reliable data foundation for subsequent physiological state analysis algorithms, and ultimately improving the accuracy of judging the user's physiological state information. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0037] Figure 1 A circuit diagram of the electrode detection circuit of a bioelectric signal detection device provided in an embodiment of the present invention;

[0038] Figure 2 This is a flowchart of a bioelectric signal detection method provided in an embodiment of the present invention;

[0039] Figure 3 This is a detailed flowchart of step S200 of the bioelectric signal detection method provided in an embodiment of the present invention;

[0040] Figure 4 A detailed flowchart of step S200 of the bioelectric signal detection method provided in another embodiment of the present invention;

[0041] Figure 5 A detailed flowchart of step S200 of the bioelectric signal detection method provided in another embodiment of the present invention;

[0042] Figure 6 This is a detailed flowchart of step S200 of the bioelectric signal detection method provided in another embodiment of the present invention.

[0043] Explanation of icon numbers:

[0044] 100. Electrode detection circuit of bioelectric signal detection equipment; 1. Skin conductance detection circuit; 11. Skin conductance response chip; 12. Skin conductance response electrode group; 121. Skin conductance response positive electrode; 122. Skin conductance response negative electrode; 13. First branch; 14. Third branch; 2. Neural conductance detection circuit; 21. Neural conductance chip; 22. Neural conductance electrode group; 221. Neural conductance positive electrode; 222. Neural conductance negative electrode; 23. Second branch; 231. First switch; 3. Backup electrode; 31. Fourth branch; 32. Second switch; 33. Fifth branch; 34. Ground electrode.

[0045] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely one partial embodiment of the present invention, and not the entire embodiment. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each shell in a certain specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0048] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0049] In the electrode detection circuits of existing bioelectric signal detection devices, there are usually multiple different electrodes to detect different bioelectric signals. However, for wearable bioelectric signal detection devices, the design space of the electrodes is limited. Therefore, the electrode area available for detecting each type of bioelectric signal is limited, resulting in an insufficient number of bioelectric signals collected. This leads to insufficient accuracy in judging the user's physiological state information through bioelectric signals.

[0050] To address the above problems, this invention proposes an electrode detection circuit 100 for a bioelectric signal detection device.

[0051] Please see Figure 1 The electrode detection circuit 100 of the bioelectric signal detection device in this embodiment includes a skin conductance detection circuit 1 and a nerve conductance detection circuit 2. The skin conductance detection circuit 1 includes a skin conductance response chip 11 (Galvanic SkinResponse, The circuit includes a skin electroreactivity (GSR) and a skin electroreactivity electrode group 12. The skin electroreactivity electrode group 12 includes a skin electroreactivity positive electrode 121 and a skin electroreactivity negative electrode 122. The skin electroreactivity positive electrode 121 and the skin electroreactivity negative electrode 122 are each connected to the skin electroreactivity chip 11 through a first branch 13. The neural electrical detection circuit 2 includes a neural electrical chip 21 (Electroneurogram, ENG) and a neural electrical electrode group 22. The neural electrical electrode group 22 includes two neural electrical positive electrodes 221 and two neural electrical negative electrodes 222. The two neural electrical positive electrodes 221 and the two neural electrical negative electrodes 222 are each connected to the neural electrical chip 21 through a second branch 23. Each second branch 23 is provided with a first switch 231. Multiple first switches 231 are each connected to the skin electroreactivity chip 11 through a third branch 14. Each first switch 231 can control the on / off state of its corresponding second branch 23 and third branch 14.

[0052] Understandably, in practical applications, in order to simplify the circuit, the branches connected to the skin conductance response chip 11, such as the first branch 13, the third branch 14 and the fourth branch 31, can share the same main circuit before they are branched off, and each of the second branches 23 can also share the same main circuit before they are branched off.

[0053] In the technical solution of this invention, the positive electrode 121 and negative electrode 122 of the electrodermal response are connected to the electrodermal response chip 11 via the first branch 13, so that the electrodermal response signals detected by the positive electrode 121 and negative electrode 122 are directly sent to the electrodermal response chip 11. The positive electrode 221 and negative electrode 222 of the neural electrical response are connected to the neural electrical chip 21 via the second branch 23. A first switch 231 is provided on the second branch 23, and the first switch 231 is connected to the electrodermal response chip 11 via the third branch 14. The first switch 231 switches the on / off state of the second branch 23 and the third branch 14. When the second branch... When branch 23 is on and branch 14 is off, the positive and negative neural electrodes 221 and 222 transmit the detected neural electrical signals to the neural electrical chip 21. When branch 23 is off and branch 14 is on, both the positive and negative neural electrodes 221 and 222 are used to detect skin electrical response signals for the skin electrical response chip 11. This design allows the positive and negative neural electrodes to be used for skin electrical response signal detection when neural electrical signals are not needed, significantly increasing the electrode area for collecting skin electrical response signals. This greatly improves the acquisition capability and signal quality of skin electrical response signals, and enhances the quantity and stability of signals. Especially in wearable applications under long-term, dynamic environments, this design effectively alleviates the problem of signal loss or quality degradation caused by insufficient electrode area, thus providing a more sufficient and reliable data foundation for subsequent physiological state analysis algorithms, ultimately improving the accuracy of judging the user's physiological state information.

[0054] In one embodiment, the electrode detection circuit further includes two backup electrodes 3, each backup electrode 3 being connected to the skin conductance response chip 11 via a fourth branch 31. Each fourth branch 31 is provided with a second switch 32, and each second switch 32 can control the on / off state of its corresponding fourth branch 31.

[0055] Based on the existing skin conductance electrode group 12 and the reusable neuroelectric electrode group 22, the newly added backup electrode 3 can be connected to the detection circuit via the fourth branch 31 by closing the corresponding second switch 32 when the signal quality of some electrodes deteriorates due to improper wearing, dirt, detachment, or increased contact impedance. This replaces the faulty electrode or serves as a supplementary electrode, effectively ensuring the continuity and stability of skin conductance signal acquisition. Furthermore, wearable devices often experience changes in electrode-skin contact due to factors such as user movement, sweating, and dry skin. The backup electrode 3 provides an additional signal acquisition node, thus adapting to different usage environments and physiological states and maintaining high-quality signal acquisition.

[0056] In one embodiment, each of the plurality of second switches 32 is connected to the ground electrode 34 through a fifth branch 33, and each second switch 32 can control the on / off state of its corresponding fifth branch 33.

[0057] When the backup electrode 3 is not involved in signal acquisition, its corresponding fourth branch 31 can be disconnected via the second switch 32, while the fifth branch 33 is turned on, so that the backup electrode 3 is physically connected to the ground electrode 34. This can quickly guide the static charge accumulated on the electrode or the introduced electromagnetic interference signal to the ground electrode 34, avoiding charge accumulation that could damage the delicate skin conduction response chip 11 at the back end, and significantly enhancing the reliability and service life of the device.

[0058] In one embodiment, both the first switch 231 and the second switch 32 are analog switches.

[0059] The analog switch features extremely low on-resistance and high off-isolation. When the first switch 231 or the second switch 32 is turned on, its extremely low on-resistance has a negligible impact on the signal path, avoiding additional voltage drops or signal attenuation introduced by the switch and ensuring the transmission of weak bioelectrical signals from the electrodes to the chip. Furthermore, compared to mechanical relays, the analog switch has an extremely fast switching speed (typically on the order of microseconds or even nanoseconds) and is free from contact bounce. This characteristic enables the system to switch quickly and smoothly between different signal detection modes (such as skin conductance detection and nerve conductance detection).

[0060] The present invention also provides a bioelectric signal detection device, which applies the electrode detection circuit 100 of the above-mentioned bioelectric signal detection device; the skin electroreaction electrode group 12 is used to contact the skin and detect the skin electroreaction signal, and send the detected skin electroreaction signal to the skin electroreaction chip 11; the nerve electroreaction electrode group 22 is used to contact the skin and detect the nerve electroreaction signal, and send the detected nerve electroreaction signal to the nerve electroreaction chip 21.

[0061] The specific structure of the electrode detection circuit 100 of the bioelectric signal detection device is as described in the above embodiments. Since this bioelectric signal detection device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. Specifically, the bioelectric signal detection device can be a wearable device such as a smartwatch, smart glasses, or detection patch, or it can be a terminal device electrically connected to the bioelectric signal detection module. The terminal device can be used to acquire the skin conductance response signal and nerve conductance signal detected by the bioelectric signal detection module, thereby performing statistical analysis on the user's health status.

[0062] Please see Figure 2 The present invention also provides a bioelectric signal detection method, applied to the above-mentioned bioelectric signal detection device, the bioelectric signal detection method comprising the following steps:

[0063] S100: The bioelectric signal detection device is attached to the user's skin;

[0064] The electrode contact surfaces of the bioelectric signal detection device are kept in close and stable contact with the user's skin (usually suitable areas such as the wrist or forehead) to ensure that all electrodes (including the positive electrode 121 of skin conductance response, the negative electrode 122 of skin conductance response, the positive electrode 221 of nerve conductance, the negative electrode 222 of nerve conductance and the spare electrode 3) can establish an effective electrical connection circuit.

[0065] S200: Acquire the user's skin conductance response signal;

[0066] The user's skin conductance signal is acquired through the skin conductance electrode group 12 or the skin conductance electrode group 12 and the neuroelectric electrode group 22.

[0067] S300: Acquire the user's neural electrical signals.

[0068] Please see Figure 3 In one embodiment, step S200 includes:

[0069] S210a: Disconnect the corresponding third branch by each of the first switches, so that the skin electroreaction chip is disconnected from each of the positive and negative nerve electrodes;

[0070] The first switch 231 on all the second branches 23 in the neural electrical detection circuit 2 is switched to the state of disconnecting their third branches 14. This operation cuts off the connection between the positive and negative neural electrodes 221 and the skin electrical response chip 11.

[0071] S220a: The user's electrodermal response signal is obtained through the positive and negative electrodes of the electrodermal response.

[0072] With the neuroelectrode group 22 isolated, the skin conduction response chip 11 collects raw analog electrical signals from the positive skin conduction response electrode 121 and the negative skin conduction response electrode 122 through its dedicated first branch 13.

[0073] Please see Figure 4 In another embodiment, step S200 includes:

[0074] S210b: By turning on the corresponding third branch and disconnecting the corresponding second branch through each of the first switches, the skin electroreaction chip is connected to each of the positive and negative nerve electrodes;

[0075] By disconnecting the second branch 23 (leading to the nerve electrical chip 21) where all the first switches 231 are located, and simultaneously connecting the third branch 14 (leading to the skin electrical response chip 11) where they are located, the positive nerve electrode 221 and the negative nerve electrode 222 are connected to the skin electrical response chip 11.

[0076] S220b: The user's skin conductance signal is acquired through the positive electrode of the skin conductance response, the negative electrode of the skin conductance response, each of the positive electrodes of the nerve conductance response, and each of the negative electrodes of the nerve conductance response.

[0077] The skin conductance response chip 11 simultaneously acquires skin conductance response signals via six electrodes: a positive electrode 121, a negative electrode 122, and two positive and two negative nerve electrodes 221 connected via a third branch 14. The six electrodes may cover a relatively large skin area or be positioned in different directions, providing preliminary spatial information for detection. The system can compare the signal differences between different electrode pairs to determine which electrodes provide optimal contact and the strongest signal, thereby optimizing data or enabling simple signal source verification, further enhancing data reliability.

[0078] Please see Figure 5 In another embodiment, the electrode detection circuit further includes two spare electrodes 3, each spare electrode 3 being connected to the skin conductance response chip 11 via a fourth branch 31, and each fourth branch 31 being provided with a second switch 32.

[0079] Step S200 includes:

[0080] S210c: By turning on the corresponding third branch and disconnecting the corresponding second branch through each of the first switches, the skin electroreaction chip is connected to each of the positive and negative nerve electrodes;

[0081] By disconnecting the second branch 23 (leading to the nerve electrical chip 21) where all the first switches 231 are located, and simultaneously connecting the third branch 14 (leading to the skin electrical response chip 11) where they are located, the positive nerve electrode 221 and the negative nerve electrode 222 are connected to the skin electrical response chip 11.

[0082] S220c: The corresponding fourth branch is turned on by each of the second switches, so that the skin electroreaction chip is connected to each of the backup electrodes;

[0083] By turning on the fourth branch 31 (leading to the skin electroreaction chip 11) where all the second switches 32 are located, the backup electrode 3 is connected to the skin electroreaction chip 11.

[0084] S230c: The user's skin conductance signal is acquired through the positive electrode of skin conductance, the negative electrode of skin conductance, each of the backup electrodes, each of the positive and negative electrodes of nerve conductance.

[0085] The skin conductance response chip 11 uses eight electrodes—a positive electrode 121, a negative electrode 122, two positive and two negative nerve electrodes 221 connected via a third branch 14, and two backup electrodes 3—to simultaneously acquire skin conductance response signals. This further increases the skin area covered by the detection electrodes, increases the number of detected skin conductance response signals, and improves the accuracy of the detection results. The system can compare the signal differences between different electrode pairs to determine which electrodes have the best contact and the strongest signal, thereby optimizing data or enabling simple signal source verification, further enhancing the reliability of the data.

[0086] Please see Figure 6 In another embodiment, the electrode detection circuit further includes two spare electrodes 3, each spare electrode 3 being connected to the skin conductance response chip 11 via a fourth branch 31, and each fourth branch 31 being provided with a second switch 32, the second switch 32 being connected to the ground electrode 34 via a fifth branch 33.

[0087] Step S200 includes:

[0088] S210d: Disconnect the corresponding third branch and connect the corresponding second branch by each of the first switches, so that the skin electroreaction chip is disconnected from each of the nerve positive electrodes and each of the nerve negative electrodes, and the nerve chip is connected to each of the nerve positive electrodes and each of the nerve negative electrodes;

[0089] By connecting all the first switches 231 to their respective second branches 23 (leading to the neural electrical chip 21), and simultaneously disconnecting their respective third branches 14 (leading to the skin electrical response chip 11), each neural electrical positive electrode 221 and each neural electrical negative electrode 222 are connected to the neural electrical chip 21.

[0090] S220d: Disconnect the corresponding fourth branch and connect the corresponding fifth branch by each second switch, so that the spare electrode is connected to the ground electrode;

[0091] By connecting the fifth branch 33 where all the second switches 32 are located, disconnecting the corresponding fourth branch 31, the spare electrode 3 is disconnected from the skin electroreaction chip 11 and connected to the ground electrode 34.

[0092] S230d: The user's electrodermal response signal is obtained through the positive and negative electrodes of the electrodermal response;

[0093] The positive electrode 121 and the negative electrode 122 of the electrodermal response are always connected to the electrodermal response chip 11 through the first branch 13, and the user's electrodermal response signal is obtained through the positive electrode 121 and the negative electrode 122 of the electrodermal response.

[0094] Step S300 includes:

[0095] S310d: Obtain the user's neural electrical signal through each of the said neural positive electrodes and each of the said neural negative electrodes.

[0096] By connecting the fifth branch 33 through the second switch 32, the backup electrode 3 is connected to the ground electrode 34. This allows the static charge accumulated on the electrode or the electromagnetic interference signal introduced to be quickly directed to the ground electrode 34, preventing charge accumulation from damaging the delicate skin conduction response chip 11 at the back end, and significantly enhancing the reliability and service life of the device.

[0097] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An electrode detection circuit for a bioelectric signal detection device, characterized in that, include: A skin conductance detection circuit, comprising a skin conductance response chip and a skin conductance response electrode group, wherein the skin conductance response electrode group comprises a skin conductance response positive electrode and a skin conductance response negative electrode, and the skin conductance response positive electrode and the skin conductance response negative electrode are each connected to the skin conductance response chip through a first branch; A neural electrical detection circuit, comprising a neural electrical chip and a neural electrical electrode group, wherein the neural electrical electrode group comprises two positive neural electrodes and two negative neural electrodes, and each of the two positive neural electrodes and the two negative neural electrodes is connected to the neural electrical chip through a second branch; Each of the second branches is provided with a first switch, and each of the first switches is connected to the skin conductance response chip through a third branch. Each first switch can control the on / off state of its corresponding second branch and the third branch.

2. The electrode detection circuit of the bioelectric signal detection device as described in claim 1, characterized in that, The electrode detection circuit also includes two backup electrodes, each of which is connected to the skin conductance chip via a fourth branch. Each fourth branch is equipped with a second switch, which controls the on / off state of the corresponding fourth branch.

3. The electrode detection circuit of the bioelectric signal detection device as described in claim 2, characterized in that, Each of the second switches is connected to the ground via a fifth branch, and each second switch can control the on / off state of its corresponding fifth branch.

4. The electrode detection circuit of the bioelectric signal detection device as described in claim 2, characterized in that, Both the first switch and the second switch are analog switches.

5. A bioelectrical signal detection device, characterized in that, The application includes an electrode detection circuit as described in any one of claims 1 to 4; the skin electrical response electrode group is used to contact the skin and detect skin electrical response signals, and send the detected skin electrical response signals to the skin electrical response chip; the neural electrical electrode group is used to contact the skin and detect neural electrical signals, and send the detected neural electrical signals to the neural electrical chip.

6. A method for detecting bioelectrical signals, characterized in that, Applied to the bioelectric signal detection device as described in claim 5, the bioelectric signal detection method includes the following steps: The bioelectric signal detection device is attached to the user's skin; Acquire the user's skin conductance response signal; Acquire the user's neural electrical signals.

7. The bioelectrical signal detection method as described in claim 6, characterized in that, The steps for obtaining the user's skin conductance response signal include: By disconnecting the corresponding third branch through each of the first switches, the skin electroreaction chip is disconnected from each of the positive and negative nerve electrodes. The user's electrodermal response (EDR) signal is obtained through the positive and negative electrodes of the EDR.

8. The bioelectrical signal detection method as described in claim 6, characterized in that, The steps for obtaining the user's skin conductance response signal include: By turning on the corresponding third branch and disconnecting the corresponding second branch through each of the first switches, the skin electroreaction chip is connected to each of the positive and negative nerve electrodes. The user's skin conductance signal is obtained through the positive electrode of the skin conductance response, the negative electrode of the skin conductance response, each of the positive electrodes of the nerve conductance response, and each of the negative electrodes of the nerve conductance response.

9. The bioelectrical signal detection method as described in claim 6, characterized in that, The electrode detection circuit also includes two backup electrodes, each of which is connected to the skin conductance chip via a fourth branch, and each of the fourth branches is equipped with a second switch. The steps for obtaining the user's skin conductance response signal include: By turning on the corresponding third branch and disconnecting the corresponding second branch through each of the first switches, the skin electroreaction chip is connected to each of the positive and negative nerve electrodes. By turning on the corresponding fourth branch through each of the second switches, the skin electroreaction chip is connected to each of the backup electrodes; The user's skin conductance signal is acquired through the positive electrode of the skin conductance response, the negative electrode of the skin conductance response, each of the backup electrodes, each of the positive and negative electrodes of the nerve conductance response.

10. The bioelectrical signal detection method as described in claim 6, characterized in that, The electrode detection circuit also includes two backup electrodes, each of which is connected to the skin conductance chip via a fourth branch. Each fourth branch is equipped with a second switch, which is connected to the ground via a fifth branch. The steps for obtaining the user's skin conductance response signal include: By disconnecting the corresponding third branch and connecting the corresponding second branch through each of the first switches, the skin electroreaction chip is disconnected from each of the positive and negative nerve electrodes, and the nerve electrode chip is connected to each of the positive and negative nerve electrodes. By disconnecting the corresponding fourth branch and connecting the corresponding fifth branch through each second switch, the spare electrode is connected to the ground electrode. The user's electrodermal response signal is obtained through the positive and negative electrodes of the electrodermal response. The steps for acquiring the user's neural electrical signals include: The user's neural electrical signals are acquired through each of the aforementioned positive and negative neural electrodes.

Images