Bioelectric signal detection equipment, detection method and electrode detection circuit thereof

Abstract

The invention discloses a bioelectricity signal detection device, a bioelectricity signal detection method and an electrode detection circuit of the bioelectricity signal detection device, and relates to the technical field of electrical signal detection.The electrode detection circuit of a bioelectricity signal detection module comprises a skin electricity detection circuit and a nerve electricity detection circuit, the skin electric detection circuit comprises a skin electric reaction chip and a skin electric reaction electrode group; the skin electric reaction positive electrode and the skin electric reaction negative electrode are respectively connected with the skin electric reaction chip through a first branch circuit; the neural electric detection circuit comprises a neural electric chip and a neural electric electrode group; the two neural electric positive electrodes and the two neural electric negative electrodes are connected with the neural electric chip through second branches respectively; each second branch is provided with a first switch, and each first switch is connected with the skin electric reaction chip through a third branch. Through cooperation of the third branch circuit and the first switch, the electroneurographic signal positive electrode and the electroneurographic signal negative electrode are used for skin electric response signal detection, and the accuracy of judgment of physiological state information of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical signal detection, and in particular to a bioelectrical signal detection device, a detection method and an electrode detection circuit thereof. Background Art

[0002] Bioelectrical signal detection, such as galvanic skin response (GSR) and neural or electromyographic (ENG) signals, 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 on the human body's physiological state in a non-invasive or minimally invasive manner, providing doctors with important physiological and pathological evidence.

[0003] The electrode detection circuit of the bioelectric signal detection device in the prior art usually has multiple different electrodes to detect different bioelectric signals. However, for wearable bioelectric signal detection devices, the design space of the electrodes is limited, so the electrode area available for detecting each type of bioelectric signal is limited, resulting in an insufficient number of bioelectric signals collected, making the accuracy of judging the user's physiological status information through bioelectric signals insufficient. Summary of the Invention

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

[0005] To achieve the above-mentioned object, the present invention provides an electrode detection circuit for a bioelectric signal detection device, comprising: A skin galvanic detection circuit, the skin galvanic detection circuit comprising a skin galvanic response chip and a skin galvanic response electrode group, the skin galvanic response electrode group comprising a skin galvanic response positive electrode and a skin galvanic response negative electrode, the skin galvanic response positive electrode and the skin galvanic response negative electrode each being connected to the skin galvanic response chip via a first branch; A neuroelectric detection circuit, comprising a neuroelectric chip and a neuroelectric electrode group, wherein the neuroelectric electrode group comprises two neuroelectric positive electrodes and two neuroelectric negative electrodes, wherein the two neuroelectric positive electrodes and the two neuroelectric negative electrodes are each connected to the neuroelectric chip via a second branch; Each of the second branches is provided with a first switch, and each of the plurality of first switches is connected to the skin electrical response chip via a third branch. Each of the first switches can control the on and off of the corresponding second branch and the third branch.

[0006] In one embodiment, the electrode detection circuit also includes two spare electrodes, each of which is connected to the skin electrical response chip through a fourth branch, and each of the fourth branches is provided with a second switch, and each of the second switches can control the on and off of the corresponding fourth branch.

[0007] In one embodiment, each of the plurality of second switches is connected to the ground via a fifth branch, and each second switch can control the on / off of the corresponding fifth branch.

[0008] In one embodiment, both the first switch and the second switch are analog switches.

[0009] The present invention also provides a bioelectric signal detection device, which is equipped with the above-mentioned electrode detection circuit; the skin electrical response electrode group is used to contact with the skin and detect skin electrical response signals, and send the detected skin electrical response signals to the skin electrical response chip; the neuroelectric electrode group is used to contact with the skin and detect neuroelectric signals, and send the detected neuroelectric signals to the neuroelectric chip.

[0010] The present invention also provides a bioelectric signal detection method, which is applied to the above-mentioned bioelectric signal detection device, and the bioelectric signal detection method includes the following steps: Applying the bioelectric signal detection device to the user's skin; Acquiring a skin galvanic response signal of the user; Obtaining neural electrical signals of the user.

[0011] In one embodiment, the step of obtaining the user's galvanic skin response signal includes: Disconnecting the corresponding third branch by each first switch to disconnect the skin electrical response chip from each neural electrical positive electrode and each neural electrical negative electrode; The skin electrical response signal of the user is obtained through the skin electrical response positive electrode and the skin electrical response negative electrode.

[0012] In one embodiment, the step of obtaining the user's galvanic skin response signal includes: The corresponding third branch is turned on and the corresponding second branch is turned off by each of the first switches, so that the skin electrical response chip is connected to each of the positive nerve electrodes and each of the negative nerve electrodes; The user's electrical skin response signal is obtained through the skin electrical response positive electrode, the skin electrical response negative electrode, each of the neural electrical positive electrodes and each of the neural electrical negative electrodes.

[0013] In one embodiment, the electrode detection circuit further includes two spare electrodes, each of the spare electrodes is connected to the skin electrical response chip via a fourth branch, and each of the fourth branches is provided with a second switch; The step of obtaining the user's galvanic skin response signal includes: The corresponding third branch is turned on and the corresponding second branch is turned off by each of the first switches, so that the skin electrical response chip is connected to each of the positive nerve electrodes and each of the negative nerve electrodes; Turning on the corresponding fourth branch via each of the second switches to connect the galvanic skin response chip to each of the backup electrodes; The user's electrical skin response signal is obtained through the skin electrical response positive electrode, the skin electrical response negative electrode, each of the backup electrodes, each of the neural electrical positive electrodes and each of the neural electrical negative electrodes.

[0014] In one embodiment, the electrode detection circuit further includes two spare electrodes, each of the spare electrodes is connected to the skin electrical response chip via a fourth branch, each of the fourth branches is provided with a second switch, and the second switch is connected to the ground via a fifth branch; The step of obtaining the user's galvanic skin response signal includes: Disconnecting the corresponding third branch and connecting the corresponding second branch by each first switch, so that the skin electrical response chip is disconnected from each neural electrical positive electrode and each neural electrical negative electrode, and connecting the neural electrical chip to each neural electrical positive electrode and each neural electrical negative electrode; disconnecting the corresponding fourth branch and conducting the corresponding fifth branch through each second switch, so that the standby electrode is connected to the ground electrode; Acquire a skin galvanic response signal of the user through the skin galvanic response positive electrode and the skin galvanic response negative electrode; The step of obtaining the user's neural electrical signal includes: The user's neural electrical signals are obtained through each of the neural electrical positive electrodes and each of the neural electrical negative electrodes.

[0015] In the technical solution of the present invention, the skin electrical response positive electrode and the skin electrical response negative electrode are connected to the skin electrical response chip through the first branch, so that the skin electrical response signals detected by the skin electrical response positive electrode and the skin electrical response negative electrode are directly sent to the skin electrical response chip, and the neural electrical positive electrode and the neural electrical negative electrode are connected to the neural electrical chip through the second branch. A first switch is set on the second branch, and the first switch is connected to the skin electrical response chip through the third branch. The second branch and the third branch are switched on and off by the first switch. When the second branch is turned on and the third branch is turned off, the neural electrical positive electrode and the neural electrical negative electrode send the detected neural electrical signals to the neural electrical chip. When the second branch is turned off and the third branch is turned on, the neural electrical positive electrode and the neural electrical negative electrode are both used to detect skin response electrical signals for the skin electrical response chip. With this design, when there is no need to detect neural electrical signals, the neural electrical signals are applied to skin electrical response signal detection, which greatly increases the electrode area used to collect skin electrical response signals, thereby greatly improving the collection capability and signal quality of skin electrical response signals, and enhancing the quantity and stability of signals. Especially in wearable applications in 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 basis for subsequent physiological state analysis algorithms, and ultimately improving the accuracy of judgment of user physiological state information. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 the structures shown in these drawings without paying any creative work.

[0017] Figure 1 A circuit diagram of an electrode detection circuit of a bioelectric signal detection device provided by an embodiment of the present invention; Figure 2 A flowchart of a bioelectric signal detection method according to an embodiment of the present invention; Figure 3 This is a detailed flowchart of step S200 of the bioelectric signal detection method provided by one embodiment of the present invention; Figure 4 A detailed flowchart of step S200 of a bioelectric signal detection method according to another embodiment of the present invention; Figure 5 A detailed flowchart of step S200 of a bioelectric signal detection method according to another embodiment of the present invention; Figure 6This is a detailed flowchart of step S200 of the bioelectric signal detection method provided in yet another embodiment of the present invention.

[0018] Description of Figure Numbers: 100. Electrode detection circuit of bioelectric signal detection equipment; 1. Skin electrical detection circuit; 11. Skin electrical response chip; 12. Skin electrical response electrode group; 121. Skin electrical response positive electrode; 122. Skin electrical response negative electrode; 13. First branch; 14. Third branch; 2. Neuroelectric detection circuit; 21. Neuroelectric chip; 22. Neuroelectric electrode group; 221. Neuroelectric positive electrode; 222. Neuroelectric negative electrode; 23. Second branch; 231. First switch; 3. Spare electrode; 31. Fourth branch; 32. Second switch; 33. Fifth branch; 34. Ground electrode.

[0019] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiment is only a partial embodiment of the present invention, not a complete embodiment. All other embodiments derived by ordinary technicians in this field based on the embodiments of the present invention without inventive work shall fall within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various shell parts in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] The electrode detection circuit of the bioelectric signal detection device in the prior art usually has multiple different electrodes to detect different bioelectric signals. However, for wearable bioelectric signal detection devices, the design space of the electrodes is limited, so the electrode area available for detecting each type of bioelectric signal is limited, resulting in an insufficient number of bioelectric signals collected, making the accuracy of judging the user's physiological status information through bioelectric signals insufficient.

[0024] To solve the above problems, the present invention provides an electrode detection circuit 100 for a bioelectric signal detection device.

[0025] See also Figure 1 The electrode detection circuit 100 of the bioelectrical signal detection device of this embodiment includes a skin electrical detection circuit 1 and a nerve electrical detection circuit 2. The skin electrical detection circuit 1 includes a skin electrical response chip 11 (Galvanic Skin Response, GSR) and a skin electrical response electrode group 12, the skin electrical response electrode group 12 includes a skin electrical response positive electrode 121 and a skin electrical response negative electrode 122, the skin electrical response positive electrode 121 and the skin electrical response negative electrode 122 are each connected to the skin electrical response chip 11 through a first branch 13; the neuroelectric detection circuit 2 includes a neuroelectric chip 21 (Electroneurogram, ENG) and a neuroelectric electrode group 22, the neuroelectric electrode group 22 includes two neuroelectric positive electrodes 221 and two neuroelectric negative electrodes 222, the two neuroelectric positive electrodes 221 and the two neuroelectric negative electrodes 222 are each connected to the neuroelectric chip 21 through a second branch 23; each second branch 23 is provided with a first switch 231, and multiple first switches 231 are each connected to the skin electrical response chip 11 through a third branch 14, and each first switch 231 can control the on and off of the corresponding second branch 23 and third branch 14.

[0026] It can be understood that in actual applications, in order to simplify the circuit, the first branch 13, the third branch 14 and the fourth branch 31 and other branches connected to the skin electrical response chip 11 can share the same main circuit before being branched, and the second branches 23 can also share the same main circuit before being branched.

[0027] In the technical solution of the present invention, the skin electrical response positive electrode 121 and the skin electrical response negative electrode 122 are connected to the skin electrical response chip 11 through the first branch 13, so that the skin electrical response signal detected by the skin electrical response positive electrode 121 and the skin electrical response negative electrode 122 is directly sent to the skin electrical response chip 11, and the neural electrical positive electrode 221 and the neural electrical negative electrode 222 are connected to the neural electrical chip 21 through the second branch 23, a first switch 231 is set on the second branch 23, and the first switch 231 is connected to the skin electrical response chip 11 through the third branch 14, and the second branch 23 and the third branch 14 are switched on and off by the first switch 231. When the second branch When the second branch 23 is turned on and the third branch 14 is turned off, the neural positive electrode 221 and the neural negative electrode 222 send the detected neural electrical signals to the neural electrical chip 21. When the second branch 23 is turned off and the third branch 14 is turned on, the neural positive electrode 221 and the neural negative electrode 222 are both used to detect the skin electrical response signal for the skin electrical response chip 11. This design allows the neural signal positive electrode and the neural signal negative electrode to be used for skin electrical response signal detection when there is no need to detect the neural signal. This greatly increases the electrode area used to collect the skin electrical response signal, thereby greatly improving the collection capability and signal quality of the skin electrical response signal, and enhancing the number and stability of the signal. Especially in wearable applications in long-term and 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 basis for subsequent physiological state analysis algorithms, and ultimately improving the accuracy of the judgment of the user's physiological state information.

[0028] In one embodiment, the electrode detection circuit also includes two spare electrodes 3, each spare electrode 3 is connected to the skin electrical response chip 11 through a fourth branch 31, and each fourth branch 31 is provided with a second switch 32, and each second switch 32 can control the on and off of the corresponding fourth branch 31.

[0029] Based on the original galvanic skin response electrode group 12 and the reusable neural electrical electrode group 22, the newly added spare electrode 3 can connect the spare electrode 3 to the detection circuit through the fourth branch 31 by closing the corresponding second switch 32 when the signal quality of some electrodes decreases due to poor wearing, contamination, detachment, or increased contact impedance, replacing the faulty electrode or serving as a supplementary electrode, effectively ensuring the continuity and stability of galvanic skin response signal acquisition. In actual use, wearable devices often cause changes in the electrode-skin contact state due to factors such as user exercise, sweating, and dry skin. The spare electrode 3 provides an additional signal acquisition node to adapt to different usage environments and physiological states and maintain high-quality signal acquisition.

[0030] In one embodiment, each of the plurality of second switches 32 is connected to the ground 34 via a fifth branch 33 , and each second switch 32 can control the on / off of the corresponding fifth branch 33 .

[0031] When the backup electrode 3 is not participating in signal acquisition, the corresponding fourth branch 31 can be disconnected via the second switch 32, while the fifth branch 33 is connected, physically connecting the backup electrode 3 to the ground 34. This allows static charges accumulated on the electrode or introduced electromagnetic interference signals to be quickly diverted to the ground 34, preventing charge accumulation from breaking down the sophisticated galvanic skin response chip 11 at the back end, significantly enhancing the reliability and service life of the device.

[0032] In one embodiment, the first switch 231 and the second switch 32 are both analog switches.

[0033] Analog switches have 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 minimal impact on the signal path, avoiding additional voltage drop or signal attenuation introduced by the switch, and ensuring that weak bioelectric signals are transmitted from the electrode to the chip. Furthermore, compared to mechanical relays, analog switches have extremely fast switching speeds (typically in the microsecond or even nanosecond range) and no contact jitter. This feature enables the system to switch quickly and smoothly between different signal detection modes (such as skin electrode detection and neural electrode detection).

[0034] The present invention also provides a bioelectric signal detection device, which uses the electrode detection circuit 100 of the above-mentioned bioelectric signal detection device; the skin electrical response electrode group 12 is used to contact with the skin and detect the skin electrical response signal, and send the detected skin electrical response signal to the skin electrical response chip 11; the neural electrical electrode group 22 is used to contact with the skin and detect neural electrical signals, and send the detected neural electrical signals to the neural electrical chip 21.

[0035] The specific structure of the electrode detection circuit 100 of the bioelectric signal detection device refers to the above-mentioned embodiment. Since the present bioelectric signal detection device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described in detail here. Specifically, the bioelectric signal detection device can be a wearable device such as a smart watch, smart glasses or a detection patch, or it can be a terminal device electrically connected to the bioelectric signal detection module. The terminal device can be used to obtain the skin electrical response signals and neural electrical signals detected by the bioelectric signal detection module, thereby performing statistical analysis on the user's health status.

[0036] See also Figure 2 The present invention also provides a bioelectric signal detection method, which is applied to the above-mentioned bioelectric signal detection device, and the bioelectric signal detection method includes the following steps: S100: attaching the bioelectric signal detection device to the user's skin; Maintain close and stable contact between the electrode contact surface of the bioelectric signal detection device and the user's skin (usually a suitable area such as the wrist or forehead) to ensure that all electrodes (including the skin galvanic response positive electrode 121, the skin galvanic response negative electrode 122, the neural signal positive electrode 221, the neural signal negative electrode 222, and the backup electrode 3) can establish an effective electrical connection circuit; S200: Acquire a skin galvanic response signal of the user; The user's galvanic skin response signal is obtained through the galvanic skin response electrode group 12 or the galvanic skin response electrode group 12 and the neural electrical electrode group 22.

[0037] S300: Acquire neural electrical signals of the user.

[0038] See also Figure 3 In one embodiment, step S200 includes: S210a: disconnecting the corresponding third branch by each of the first switches, so as to disconnect the skin electrical response chip from each of the positive nerve electrodes and each of the negative nerve electrodes; The first switches 231 on all the second branches 23 in the neural electrical detection circuit 2 are switched to a state of disconnecting the third branches 14. This operation cuts off the connection path between the neural electrical positive electrode 221 and the neural electrical negative electrode 222 and the skin electrical response chip 11.

[0039] S220a: Acquire a skin galvanic response signal of the user through the skin galvanic response positive electrode and the skin galvanic response negative electrode.

[0040] Under the premise that the neural electrode group 22 is isolated, the skin electrical response chip 11 collects the original analog electrical signals from the skin electrical response positive electrode 121 and the skin electrical response negative electrode 122 through its dedicated first branch 13 .

[0041] See also Figure 4 In another embodiment, step S200 includes: S210b: Turning on the corresponding third branch and disconnecting the corresponding second branch through each of the first switches, so that the galvanic skin response chip is electrically connected to each of the positive and negative nerve electrodes; All first switches 231 are used to disconnect the second branch 23 (leading to the neural electrical chip 21) and at the same time connect the third branch 14 (leading to the skin electrical response chip 11), so that each neural electrical positive electrode 221 and each neural electrical negative electrode 222 are connected to the skin electrical response chip 11.

[0042] S220b: Acquire the user's electrical skin response signal through the skin electrical response positive electrode, the skin electrical response negative electrode, each of the neural electrical positive electrodes and each of the neural electrical negative electrodes.

[0043] The galvanic skin response chip 11 collects galvanic skin response signals synchronously through the galvanic skin response positive electrode 121, the galvanic skin response negative electrode 122, and two neural electrical positive electrodes 221 and two neural electrical negative electrodes 222 connected via the third branch 14, a total of six electrodes. The layout of the six electrodes may cover a slightly larger skin area or different directions, which provides preliminary spatial information for detection. 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 achieving simple signal source verification to further enhance the reliability of the data.

[0044] See also Figure 5 In another embodiment, the electrode detection circuit further includes two spare electrodes 3, each spare electrode 3 is connected to the skin electrical response chip 11 through a fourth branch 31, and each fourth branch 31 is provided with a second switch 32; Step S200 includes: S210c: Turning on the corresponding third branch and disconnecting the corresponding second branch through each of the first switches, so that the galvanic skin response chip is electrically connected to each of the positive and negative nerve electrodes; All first switches 231 are used to disconnect the second branch 23 (leading to the neural electrical chip 21) and at the same time connect the third branch 14 (leading to the skin electrical response chip 11), so that each neural electrical positive electrode 221 and each neural electrical negative electrode 222 are connected to the skin electrical response chip 11.

[0045] S220c: Turning on the corresponding fourth branch via each second switch to connect the galvanic skin response chip to each spare electrode; All the second switches 32 are connected to the fourth branch 31 (leading to the skin electrical response chip 11 ), so that the backup electrode 3 is connected to the skin electrical response chip 11 .

[0046] S230c: Acquire the user's electrical skin response signal through the skin electrical response positive electrode, the skin electrical response negative electrode, each of the backup electrodes, each of the neural electrical positive electrodes, and each of the neural electrical negative electrodes.

[0047] The galvanic skin response chip 11 uses eight electrodes, including a positive electrode 121, a negative electrode 122, two positive and two negative nerve electrodes 221, 222, connected via a third branch 14, and two spare electrodes 3, to simultaneously collect galvanic skin response signals. This further increases the skin area covered by the detection electrodes, further increases the number of detected galvanic skin response signals, and improves the accuracy of the test 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 achieving simple signal source verification, further enhancing data reliability.

[0048] See also Figure 6 In another embodiment, the electrode detection circuit further includes two spare electrodes 3, each of which is connected to the skin electrical response chip 11 via a fourth branch 31, and each fourth branch 31 is provided with a second switch 32, which is connected to the ground electrode 34 via a fifth branch 33; Step S200 includes: S210d: disconnecting the corresponding third branch and connecting the corresponding second branch through each first switch, so as to disconnect the galvanic skin response chip from the positive nerve electrodes and the negative nerve electrodes, and connect the neural chip to the positive nerve electrodes and the negative nerve electrodes; All first switches 231 are used to conduct the second branch 23 (leading to the neural electrical chip 21 ) in which they are located, while disconnecting the third branch 14 (leading to the skin electrical response chip 11 ), so that each neural electrical positive electrode 221 and each neural electrical negative electrode 222 are connected to the neural electrical chip 21 .

[0049] S220d: disconnecting the corresponding fourth branch and connecting the corresponding fifth branch through each second switch, so that the standby electrode is connected to the ground electrode; All second switches 32 are used to turn on the fifth branch 33 in which they are located, and to turn off the corresponding fourth branch 31, thereby disconnecting the spare electrode 3 from the skin electrical response chip 11 and connecting it to the ground electrode 34; S230d: Acquire a skin galvanic response signal of the user through the skin galvanic response positive electrode and the skin galvanic response negative electrode; The skin galvanic response positive electrode 121 and the skin galvanic response negative electrode 122 are always connected to the skin galvanic response chip 11 through the first branch 13 , and the user's skin galvanic response signal is obtained through the skin galvanic response positive electrode 121 and the skin galvanic response negative electrode 122 .

[0050] Step S300 includes: S310d: Obtaining the user's neural electrical signals through each of the neural electrical positive electrodes and each of the neural electrical negative electrodes.

[0051] By conducting the fifth branch 33 through the second switch 32, the backup electrode 3 is connected to the ground electrode 34, and the static charge accumulated on the electrode or the introduced electromagnetic interference signal can be quickly introduced into the ground electrode 34, preventing the charge accumulation from breaking down the precise skin electrical response chip 11 at the back end, thereby significantly enhancing the reliability and service life of the device.

[0052] The above are only optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the concept of the present invention, or direct / indirect application in other related technical fields are included in 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 galvanic detection circuit, the skin galvanic detection circuit comprising a skin galvanic response chip and a skin galvanic response electrode group, the skin galvanic response electrode group comprising a skin galvanic response positive electrode and a skin galvanic response negative electrode, the skin galvanic response positive electrode and the skin galvanic response negative electrode each being connected to the skin galvanic response chip via a first branch; A neuroelectric detection circuit, comprising a neuroelectric chip and a neuroelectric electrode group, wherein the neuroelectric electrode group comprises two neuroelectric positive electrodes and two neuroelectric negative electrodes, wherein the two neuroelectric positive electrodes and the two neuroelectric negative electrodes are each connected to the neuroelectric chip via a second branch; Each of the second branches is provided with a first switch, and each of the plurality of first switches is connected to the skin electrical response chip via a third branch. Each of the first switches can control the on and off of the corresponding second branch and the third branch.

2. The electrode detection circuit of the bioelectric signal detection device according to claim 1, wherein: The electrode detection circuit also includes two spare electrodes, each of which is connected to the skin electrical response chip through a fourth branch. Each of the fourth branches is provided with a second switch, and each of the second switches can control the on and off of the corresponding fourth branch.

3. The electrode detection circuit of the bioelectric signal detection device according to claim 2, wherein: Each of the plurality of second switches is connected to the ground via a fifth branch, and each second switch can control the on and off of the corresponding fifth branch.

4. The electrode detection circuit of the bioelectric signal detection device according to claim 2, wherein: The first switch and the second switch are both analog switches.

5. A bioelectric signal detection device, characterized in that: An electrode detection circuit as described in any one of claims 1 to 4 is applied; the skin electrical response electrode group is used to contact with 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 with the skin and detect neural electrical signals, and send the detected neural electrical signals to the neural electrical chip.

6. A bioelectric signal detection method, characterized in that: Applied to the bioelectric signal detection device according to claim 5, the bioelectric signal detection method comprises the following steps: Applying the bioelectric signal detection device to the user's skin; Acquiring a skin galvanic response signal of the user; Obtaining neural electrical signals of the user.

7. The bioelectric signal detection method according to claim 6, wherein: The step of obtaining the user's galvanic skin response signal includes: Disconnecting the corresponding third branch by each first switch to disconnect the skin electrical response chip from each neural electrical positive electrode and each neural electrical negative electrode; The skin electrical response signal of the user is obtained through the skin electrical response positive electrode and the skin electrical response negative electrode.

8. The bioelectric signal detection method according to claim 6, wherein: The step of obtaining the user's galvanic skin response signal includes: The corresponding third branch is turned on and the corresponding second branch is turned off by each of the first switches, so that the skin electrical response chip is connected to each of the positive nerve electrodes and each of the negative nerve electrodes; The user's electrical skin response signal is obtained through the skin electrical response positive electrode, the skin electrical response negative electrode, each of the neural electrical positive electrodes and each of the neural electrical negative electrodes.

9. The bioelectric signal detection method according to claim 6, wherein: The electrode detection circuit further includes two spare electrodes, each of which is connected to the skin electrical response chip via a fourth branch, and each of the fourth branches is provided with a second switch; The step of obtaining the user's galvanic skin response signal includes: The corresponding third branch is turned on and the corresponding second branch is turned off by each of the first switches, so that the skin electrical response chip is connected to each of the positive nerve electrodes and each of the negative nerve electrodes; Turning on the corresponding fourth branch via each of the second switches to connect the galvanic skin response chip to each of the backup electrodes; The user's electrical skin response signal is obtained through the skin electrical response positive electrode, the skin electrical response negative electrode, each of the backup electrodes, each of the neural electrical positive electrodes and each of the neural electrical negative electrodes.

10. The bioelectric signal detection method according to claim 6, wherein: The electrode detection circuit further includes two spare electrodes, each of which is connected to the skin electrical response chip via a fourth branch, each of which is provided with a second switch, and each of which is connected to the ground via a fifth branch; The step of obtaining the user's galvanic skin response signal includes: Disconnecting the corresponding third branch and connecting the corresponding second branch by each first switch, so that the skin electrical response chip is disconnected from each neural electrical positive electrode and each neural electrical negative electrode, and connecting the neural electrical chip to each neural electrical positive electrode and each neural electrical negative electrode; disconnecting the corresponding fourth branch and conducting the corresponding fifth branch through each second switch, so that the standby electrode is connected to the ground electrode; Acquire a skin galvanic response signal of the user through the skin galvanic response positive electrode and the skin galvanic response negative electrode; The step of obtaining the user's neural electrical signal includes: The user's neural electrical signals are obtained through each of the neural electrical positive electrodes and each of the neural electrical negative electrodes.

Images