Transcraniocerebral electroencephalogram signal acquisition system and acquisition method

Abstract

The invention discloses a transcranial electroencephalogram signal acquisition system and an acquisition method. The acquisition system comprises a main control module, a nerve stimulation module, a pillow electrode switch module and a brain wave acquisition module. The acquisition method comprises the steps that the main control module operates to carry out verification and verification, the brain wave acquisition chip carries out functional testing, the main control module analyzes acquired brain wave data, generates a transcranial electrical stimulation waveform scheme and configures and generates a corresponding electrical stimulation loop. According to the transcranial electroencephalogram signal collecting system and method, brain wave signals can be collected through a multi-channel pillow electrode assembly when a testee sleeps, the brain wave signals are analyzed through an algorithm, and the pillow electrode assembly can control a transistor electrode control circuit and a multi-channel analog switch to be switched in a time-sharing mode through a main control module; and a plurality of electrical stimulation loops are configured and generated for transcranial electrical stimulation, so that the consistency of brain wave acquisition and nerve electrical stimulation is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a transcranial electroencephalogram signal acquisition system and acquisition method. Background Art

[0002] Transcranial electrical stimulation (tES) is a non-invasive brain stimulation technology that regulates brain activity by applying weak electric currents to the scalp. It includes different forms such as transcranial direct current stimulation (tDCS) and transcranial alternating current stimulation (tACS). Neuroelectrical stimulation has a wide range of application scenarios in clinical and scientific research fields. Transcranial electrical stimulation can be used in research to explore brain region functions and network connections. It is also used in clinical treatment, such as relieving depression, anxiety and chronic pain, and improving cognitive functions such as memory, attention and learning ability.

[0003] During treatment, brain activity needs to be recorded using electrophysiological indicators through electroencephalogram (EEG). Currently, the EEG signal acquisition and neural stimulation on the market are divided into two modules for operation. Different electrodes need to be used in different areas of the brain for EEG signal acquisition or neural stimulation during testing and treatment. The same electrodes cannot be used for EEG acquisition or neural stimulation in the same EEG area, and patients need to maintain a specific sleeping position for monitoring. Summary of the invention

[0004] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a transcranial EEG signal acquisition system and acquisition method.

[0006] In order to achieve the above-mentioned object, in a first aspect, the present invention adopts a transcranial electroencephalogram signal acquisition system, comprising:

[0007] A main control module, which is used to receive configuration information and verification information, transmit transcranial electrical stimulation loop control signals, and perform transcranial electrical stimulation and brain wave signal acquisition operations;

[0008] A neural stimulation module, the neural stimulation module comprising a forward amplifier and a constant current source, the neural stimulation module being used to output a transcranial electrical stimulation signal;

[0009] A pillow electrode switch module, the pillow electrode switch module comprising a transistor electrode control circuit, a multi-way analog switch and a pillow electrode assembly, the pillow electrode switch module being used to generate a variety of electrical stimulation loops in combination;

[0010] A brain wave acquisition module, wherein the brain wave acquisition module comprises a brain wave acquisition chip and a brain wave acquisition circuit, and the brain wave acquisition module is used to read and acquire brain wave signals.

[0011] In some embodiments, the main control module, the neural stimulation module, the pillow electrode switch module and the brain wave acquisition module are electrically connected to a DC power supply, and the DC power supply is used to power the main control module, the neural stimulation module, the pillow electrode switch module and the brain wave acquisition module.

[0012] In some embodiments, the forward amplifier is electrically connected to the main control module, the forward amplifier is used to receive the electrical stimulation signal output by the main control module, and the constant current source is electrically connected to the forward amplifier, the constant current source is used to generate a transcranial electrical stimulation waveform.

[0013] In some embodiments, the transistor electrode control circuit is electrically connected to the main control module, the transistor electrode control circuit is used to cooperate with the multi-way analog switch to control the on and off of multiple electrical stimulation loops, the multi-way analog switch is electrically connected to the pillow electrode assembly, the multi-way analog switch is used to switch electrical stimulation loops, the pillow electrode assembly is electrically connected to the transistor electrode control circuit, the multi-way analog switch and the brain wave acquisition circuit, and the pillow electrode assembly is used to output transcranial electrical stimulation.

[0014] In some embodiments, the pillow electrode assembly includes multiple rows of electrode clusters arranged in parallel, and the electrode clusters are divided into an upper brain region group, a midbrain region group, and a lower brain region group. Each group of the electrode clusters includes multiple electrodes, and the electrodes are electrically connected through conductive cloth.

[0015] In some embodiments, the pillow electrode assembly, the transistor electrode control circuit, the multi-way analog switch and the brain wave acquisition circuit connection ports are provided in at least four groups, the multi-way analog switch is provided with a switching port, and the main control module switches the electrical stimulation loop through the switching port.

[0016] In a second aspect, the present invention further provides a transcranial electroencephalogram (TEEK) signal acquisition method, which is performed by the transcranial electroencephalogram (TEEK) signal acquisition system as described in the first aspect, and the acquisition method steps include:

[0017] S100, the main control module is powered on and initialized, the multi-channel analog switch is operated and reset, and the brain wave acquisition chip is connected for verification;

[0018] S200, the EEG acquisition chip initializes configuration information and performs functional testing;

[0019] S300, the main control module reads the circuit on-off function and impedance value to determine the connection status, and the electrode cluster reads the brain wave data and sends it to the brain wave collection chip through the brain wave collection circuit;

[0020] S400, the main control module reads the brain wave data transmitted by the brain wave acquisition chip, analyzes the acquired brain wave data, and generates a transcranial electrical stimulation waveform program;

[0021] S500, the main control module controls the transistor electrode control circuit and the multi-way analog switch to configure and generate a corresponding electrical stimulation loop, and repeats S300-S400.

[0022] In some embodiments, the verification process in step S100 includes the following steps:

[0023] S101, the main control module sends verification data, if the verification succeeds, it goes to S102, if the verification fails, it goes to S103;

[0024] S102, the main control module determines that the state of the brain wave acquisition chip is normal and enters S200;

[0025] S103, the main control module determines that the state of the brain wave acquisition chip is abnormal and issues an alarm message.

[0026] In some embodiments, the functional test process in step S200 includes the following steps:

[0027] S201, the brain wave acquisition chip tests the circuit on-off function and impedance value through the brain wave acquisition circuit, and the main control module reads the test information. If it is normal, it enters S202, and if it is abnormal, it enters S203;

[0028] S202, the main control module determines that the brain wave acquisition circuit is connected normally and enters S300;

[0029] S203, the main control module determines that the brain wave acquisition circuit connection is abnormal and issues an alarm message.

[0030] In some embodiments, the configuration in step S500 generates a corresponding electrical stimulation loop process, the steps comprising:

[0031] S501, the main control module controls the transistor electrode control circuit and the multi-way analog switch to switch the connection port;

[0032] S502, the main control module sends the read transcranial electrical stimulation waveform configuration data to the forward amplifier, and generates a transcranial electrical stimulation waveform through a constant current source.

[0033] The present invention has the following beneficial effects:

[0034] The present invention provides a transcranial electroencephalogram (EEG) signal acquisition system and acquisition method, which can acquire EEG signals through a multi-channel pillow electrode assembly when a tester is sleeping, and analyze the EEG signals through an algorithm. The pillow electrode assembly can control the transistor electrode control circuit and the multi-channel analog switch to switch in time through a main control module, and configure a variety of electrical stimulation loops to perform transcranial electrical stimulation, thereby improving the consistency of EEG acquisition and neural electrical stimulation. The pillow electrode assembly includes a plurality of test function groups, thereby adapting to a variety of sleeping positions of the tester, maintaining contact between two or more electrode clusters and the brain, and continuously performing normal brain signal acquisition and loop electrical stimulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the principle of the transcranial EEG signal acquisition system of the present invention;

[0036] Figure 2 It is a schematic diagram of the principle of the pillow electrode assembly of the present invention;

[0037] Figure 3 The process of the transcranial EEG signal acquisition method of the present invention is as follows Figure 1 ;

[0038] Figure 4 The process of the transcranial EEG signal acquisition method of the present invention is as follows Figure 2 ;

[0039] Figure 5 The process of the transcranial EEG signal acquisition method of the present invention is as follows Figure 3 ;

[0040] Figure 6 The process of the transcranial EEG signal acquisition method of the present invention is as follows Figure 4 .

[0041] Legend:

[0042] 1. Main control module; 2. Neural stimulation module; 21. Forward amplifier; 22. Constant current source; 3. Pillow electrode switch module; 31. Transistor electrode control circuit; 32. Multi-way analog switch; 33. Pillow electrode assembly; 331. Electrode cluster; 3311. Upper brain area group; 3312. Middle brain area group; 3313. Lower brain area group; 34. Electrode; 35. Conductive cloth; 4. EEG acquisition module; 41. EEG acquisition chip; 42. EEG acquisition circuit; 5. DC power supply. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Please refer to the following examples for details:

[0045] Reference Figure 1-Figure 2 The present invention provides an embodiment of a transcranial electroencephalogram signal acquisition system, and the specific structure includes: a main control module 1, a neural stimulation module 2, a pillow electrode switch module 3 and an electroencephalogram acquisition module 4. The main control module 1 is used to receive configuration information and verification information, transmit transcranial electrical stimulation loop control signals, and perform transcranial electrical stimulation and electroencephalogram signal acquisition operations, the neural stimulation module 2 is used to output transcranial electrical stimulation signals, the pillow electrode switch module 3 is used to combine and configure to generate multiple electrical stimulation loops, and the electroencephalogram acquisition module 4 is used to read and collect electroencephalogram signals.

[0046] Specifically, the main control module 1, the neural stimulation module 2, the pillow electrode switch module 3 and the brain wave acquisition module 4 are all electrically connected to the DC power supply 5, and the DC power supply 5 is used to supply power to the main control module 1, the neural stimulation module 2, the pillow electrode switch module 3 and the brain wave acquisition module 4.

[0047] Please continue reading Figure 1-Figure 2 In this embodiment, the neural stimulation module 2 includes a forward amplifier 21 and a constant current source 22. The forward amplifier 21 is electrically connected to the main control module 1 for receiving the electrical stimulation signal output by the main control module 1, while the constant current source 22 is electrically connected to the forward amplifier 21 for generating a transcranial electrical stimulation waveform.

[0048] Please continue reading Figure 1 In this embodiment, the pillow electrode switch module 3 includes a transistor electrode control circuit 31, a multi-way analog switch 32 and a pillow electrode assembly 33. The transistor electrode control circuit 31 is electrically connected to the main control module 1 to cooperate with the multi-way analog switch 32 to control the on and off of multiple electrical stimulation loops; the multi-way analog switch 32 is electrically connected to the pillow electrode assembly 33 to switch the electrical stimulation loop; the pillow electrode assembly 33 is electrically connected to the transistor electrode control circuit 31, the multi-way analog switch 32 and the brain wave acquisition circuit 42 to output transcranial electrical stimulation.

[0049] Furthermore, the pillow electrode assembly 33 includes multiple rows of parallel arranged electrode clusters 331, and the electrode clusters 331 are divided into an upper brain area group 3311, a midbrain area group 3312 and a lower brain area group 3313. Each electrode cluster 331 includes a plurality of electrodes 34, and the electrodes 34 are electrically connected to each other through a conductive cloth 35. The brain can be covered regardless of whether the tester is sleeping upright (head facing upward) or sleeping on the side (head facing one side).

[0050] For example, Figure 2 As shown, electrodes 34-1, 34-2, 34-3 and 34-4 are arranged in parallel, fully covering the left (two groups on one side), back (two groups in the middle) and right (two groups on the other side) areas of the tester's brain, and can cover the upper (electrode 34-1), middle (electrode 34-2 and electrode 34-3) and lower (electrode 34-4) areas of the brain for collection and transcranial electrical stimulation, and each electrode cluster 331 is electrically connected by 6 electrodes 34 through conductive cloth 35. In this way, during the actual collection and stimulation process, the entire pillow electrode assembly 33 can fit perfectly on the tester's head, and no matter what sleeping position the tester takes, more than two electrodes 34 can be kept in contact with the brain, so that normal brain signal collection and loop electrical stimulation can be achieved.

[0051] Please continue reading Figure 1 In this embodiment, the brain wave acquisition module 4 includes a brain wave acquisition chip 41 and a brain wave acquisition circuit 42. The brain wave acquisition chip 41 can convert brain waves into voltage signals, and amplify and filter them through internal circuits for further analysis by the main control module 1. Among them, the brain wave acquisition circuit 42 includes three groups of impedance circuits (P1, N1 / P2, N2 / P3, N3). The impedance test of the electrode 34 is an important step to ensure that the electrode 34 is in good contact with the skin and to ensure the signal quality. If the impedance of the electrode 34 is too high, it may cause signal distortion or increase in noise. The brain wave acquisition chip 41 tests the on-off state and impedance value of P1, N1, P2, N2, P3 and N3 and sends them to the main control module 1 to determine the connection state of the pillow electrode assembly 33 and the brain wave acquisition chip 41.

[0052] Furthermore, the pillow electrode assembly 33, the transistor electrode control circuit 31, the multi-way analog switch 32 and the brain wave acquisition circuit 42 connection ports are provided with at least four groups (T01 / TO2 / TO3 / T04), the multi-way analog switch 32 is also provided with an IO switching port (A / B / E), and the main control module 1 switches the electrical stimulation loop through the IO switching port.

[0053] Reference Figure 3-Figure 6 The present invention also provides an embodiment of a transcranial EEG signal acquisition method, which is executed by the transcranial EEG signal acquisition system in the above embodiment, and the acquisition method steps include:

[0054] S100, the main control module 1 is powered on and initialized, the multi-way analog switch 32 is operated and reset to close, and the brain wave acquisition chip 41 is connected for verification;

[0055] S200, the brain wave acquisition chip 41 initializes configuration information and performs functional testing;

[0056] S300, the main control module 1 reads the circuit on / off function and impedance value to determine the connection status, and the electrode cluster 331 reads the brain wave data and sends it to the brain wave collection chip 41 through the brain wave collection circuit 42;

[0057] S400, the main control module 1 reads the brain wave data transmitted by the brain wave acquisition chip 41, analyzes the acquired brain wave data, and generates a transcranial electrical stimulation waveform scheme;

[0058] S500, the main control module 1 controls the transistor electrode control circuit 31 and the multi-way analog switch 32, configures and generates a corresponding electrical stimulation loop, and repeats S300-S400.

[0059] Reference Figure 4 The verification process in step S100 includes the following steps:

[0060] S101, the main control module 1 sends verification data, if the verification succeeds, it goes to S102, if the verification fails, it goes to S103;

[0061] S102, the main control module 1 determines that the state of the brain wave acquisition chip 41 is normal, and enters S200;

[0062] S103, the main control module 1 determines that the state of the brain wave acquisition chip 41 is abnormal and issues an alarm message.

[0063] Reference Figure 5 , the functional test process in step S200 includes the following steps:

[0064] S201, the brain wave acquisition chip 41 tests the circuit on / off function and impedance value through the brain wave acquisition circuit 42, and the main control module 1 reads the test information, and enters S202 if it is normal, and enters S203 if it is abnormal;

[0065] S202, the main control module 1 determines that the brain wave acquisition circuit 42 is connected normally, and enters S300;

[0066] S203, the main control module 1 determines that the brain wave acquisition circuit 42 is abnormally connected and issues an alarm message.

[0067] Reference Figure 6 The configuration in step S500 generates a corresponding electrical stimulation loop process, the steps comprising:

[0068] S501, the main control module 1 controls the transistor electrode control circuit 31 and the multi-way analog switch 32 to switch the connection port;

[0069] S502 , the main control module 1 sends the read transcranial electrical stimulation waveform configuration data to the forward amplifier 21 , and generates a transcranial electrical stimulation waveform through the constant current source 22 .

[0070] Working principle:

[0071] The main control module 1 is initialized, and the system clock frequency is set to ensure that all time-related operations can be performed as expected, including configuring timers, interrupt controllers, and timers; all GPIO (general purpose input and output) pins are configured to appropriate working modes, such as input, output, or analog functions. According to design requirements, these pins can be used to control external devices, read sensor signals, or communicate with other modules; the analog switch is turned off, ensuring that the multi-way analog switch 32 is in the off state to avoid unnecessary signal interference in the circuit, and all field effect transistors (MOS tubes) are turned off to prevent current flow, thereby avoiding interference or damage to the circuit during the initialization process;

[0072] The EEG acquisition chip 41 is verified and initialized. The EEG acquisition chip has a built-in self-test function or diagnostic program to detect whether its internal circuits and functional modules are working normally; the value of the chip's internal register is set through the programming interface to configure its working mode, gain, filter and other parameters; the chip's clock source and frequency are set to ensure that the chip can process data at the correct rate; the data acquisition function is started according to the chip's requirements, and it is ready to receive EEG signal data from the electrode 34; the EEG acquisition chip 41 tests the circuit on-off function and impedance value through the EEG acquisition circuit 42, and the main control module 1 reads the impedance data of the electrode 34 from the EEG acquisition chip 41 to determine the connection status. The impedance is usually determined by the contact quality between the electrode 34 and the skin, and the electrode 34 impedance needs to be lower than a specific threshold to be considered normal; after the main control module 1 reads the test information, if it is normal, it will proceed to the next step, and if it is abnormal, it will issue an alarm message;

[0073] The main control module 1 constructs a command for reading EEG signals according to the system protocol and chip requirements, sends the command to the EEG acquisition chip through the communication interface, instructing it to start acquiring EEG signals, and then performs pre-processing such as denoising and filtering on the acquired EEG data to improve the signal quality, and then applies various algorithms (such as Fourier transform, wavelet transform, etc.) to analyze the EEG signals and extract features such as waveform, frequency, etc.; then, the sleep state, abnormal waveform or other useful information are identified based on the analysis results;

[0074] The main control module 1 generates a transcranial electrical stimulation scheme, controls the switch state of the MOS tube through the IO control port and switches the analog switch configuration to generate a corresponding electrical stimulation loop, and dynamically adjusts the electrical stimulation loop as needed after repeating the above process.

[0075] Through the above technical solution, the present application can collect brain wave signals through the multi-channel pillow electrode assembly 33 when the tester is sleeping, and analyze the brain wave signals through an algorithm. The pillow electrode assembly can control the time-sharing switching of the transistor electrode control circuit 31 and the multi-way analog switch 32 through the main control module 1, and configure a variety of electrical stimulation loops for transcranial electrical stimulation, thereby improving the consistency of brain wave collection and neural electrical stimulation; the pillow electrode assembly includes multiple test function groups, which can adapt to the tester's various sleeping positions, maintain more than two electrode clusters 331 in contact with the brain, and continue normal brain signal collection and loop electrical stimulation.

[0076] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A transcranial EEG signal acquisition system, It is characterized in that include: A main control module (1), the main control module (1) is used to receive configuration information and verification information, transmit transcranial electrical stimulation loop control signals, and perform transcranial electrical stimulation and brain wave signal collection operations; A nerve stimulation module (2), the nerve stimulation module (2) comprising a forward amplifier (21) and a constant current source (22), the nerve stimulation module (2) being used to output a transcranial electrical stimulation signal; A pillow electrode switch module (3), the pillow electrode switch module (3) comprising a transistor electrode control circuit (31), a multi-way analog switch (32) and a pillow electrode assembly (33), the pillow electrode switch module (3) being used to generate a plurality of electrical stimulation loops in a combined configuration; A brain wave acquisition module (4), the brain wave acquisition module (4) comprising a brain wave acquisition chip (41) and a brain wave acquisition circuit (42), the brain wave acquisition module (4) being used to read and acquire brain wave signals.

2. A transcranial electroencephalogram signal acquisition system according to claim 1, It is characterized in that The main control module (1), the neural stimulation module (2), the pillow electrode switch module (3) and the brain wave acquisition module (4) are electrically connected to a direct current power supply (5), and the direct current power supply (5) is used to supply power to the main control module (1), the neural stimulation module (2), the pillow electrode switch module (3) and the brain wave acquisition module (4).

3. A transcranial electroencephalogram signal acquisition system according to claim 1, It is characterized in that The forward amplifier (21) is electrically connected to the main control module (1), and the forward amplifier (21) is used to receive the electrical stimulation signal output by the main control module (1); the constant current source (22) is electrically connected to the forward amplifier (21), and the constant current source (22) is used to generate a transcranial electrical stimulation waveform.

4. A transcranial electroencephalogram signal acquisition system according to claim 1, It is characterized in that The transistor electrode control circuit (31) is electrically connected to the main control module (1); the transistor electrode control circuit (31) is used to cooperate with the multi-way analog switch (32) to control the on and off of multiple electrical stimulation loops; the multi-way analog switch (32) is electrically connected to the pillow electrode assembly (33); the multi-way analog switch (32) is used to switch electrical stimulation loops; the pillow electrode assembly (33) is electrically connected to the transistor electrode control circuit (31), the multi-way analog switch (32) and the brain wave acquisition circuit (42); and the pillow electrode assembly (33) is used to output transcranial electrical stimulation.

5. The transcranial electroencephalogram signal acquisition system according to claim 1, It is characterized in that The pillow electrode assembly (33) comprises a plurality of rows of electrode clusters (331) arranged in parallel, wherein the electrode clusters (331) are divided into an upper brain region group (3311), a midbrain region group (3312) and a lower brain region group (3313), and each group of the electrode clusters (331) comprises a plurality of electrodes (34), and the electrodes (34) are electrically connected to each other via a conductive cloth (35).

6. A transcranial electroencephalogram signal acquisition system according to claim 1, It is characterized in that The pillow electrode assembly (33), the transistor electrode control circuit (31), the multi-way analog switch (32) and the brain wave acquisition circuit (42) are provided with at least four groups of connection ports, the multi-way analog switch (32) is provided with a switching port, and the main control module (1) switches the electrical stimulation loop through the switching port.

7. A transcranial electroencephalogram signal acquisition method, It is characterized in that The acquisition method is performed via the acquisition system according to any one of claims 1 to 6, and the acquisition method steps include: S100, the main control module (1) is powered on and initialized, the multi-channel analog switch (32) is operated and reset, and the brain wave acquisition chip (41) is connected for verification; S200, the brain wave acquisition chip (41) initializes configuration information and performs functional testing; S300, the main control module (1) reads the circuit on / off function and impedance value to determine the connection state, and the electrode cluster (331) reads the brain wave data and sends it to the brain wave collection chip (41) through the brain wave collection circuit (42); S400, the main control module (1) reads the brain wave data transmitted by the brain wave acquisition chip (41), analyzes the acquired brain wave data, and generates a transcranial electrical stimulation waveform plan; S500, the main control module (1) controls the transistor electrode control circuit (31) and the multi-way analog switch (32), configures and generates a corresponding electrical stimulation loop, and repeats S300-S400.

8. A transcranial electroencephalogram signal acquisition method according to claim 7, It is characterized in that The verification process in step S100 includes the following steps: S101, the main control module (1) sends verification data, if the verification succeeds, it goes to S102, if the verification fails, it goes to S103; S102, the main control module (1) determines that the state of the brain wave acquisition chip (41) is normal, and enters S200; S103, the main control module (1) determines that the state of the brain wave acquisition chip (41) is abnormal and issues an alarm message.

9. A transcranial electroencephalogram signal acquisition method according to claim 7, It is characterized in that The functional test process in step S200 includes the following steps: S201, the brain wave acquisition chip (41) tests the circuit on / off function and impedance value through the brain wave acquisition circuit (42), and the main control module (1) reads the test information, and if it is normal, it enters S202, and if it is abnormal, it enters S203; S202, the main control module (1) determines that the brain wave acquisition circuit (42) is connected normally, and enters S300; S203, the main control module (1) determines that the brain wave acquisition circuit (42) is abnormally connected and issues an alarm message.

10. A transcranial electroencephalogram signal acquisition method according to claim 7, It is characterized in that The configuration in step S500 generates a corresponding electrical stimulation loop process, the steps comprising: S501, the main control module (1) controls the transistor electrode control circuit (31) and the multi-way analog switch (32) to switch the connection port; S502, the main control module (1) sends the read transcranial electrical stimulation waveform configuration data to the forward amplifier (21), and generates a transcranial electrical stimulation waveform through a constant current source (22).

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