Electroencephalogram acquisition and transcranial electrical stimulation system and device

Abstract

The embodiment of the application discloses a kind of electroencephalogram acquisition and transcranial electrical stimulation system and equipment, by setting current feedback module between transcranial electrical stimulation module and electrode module, current flowing through electrode module can be effectively detected, and the current value of the electrical stimulation signal flowing through electrode module is sent to host computer by central control module, to realize the real-time monitoring of current value, to prevent the current value from being too large when still stimulating the stimulated person for a long time, causing damage to the stimulated person, reduce the risk of the stimulated person being stimulated by larger current.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to an electroencephalogram acquisition and transcranial electrical stimulation system and device. BACKGROUND

[0002] With the increase of life pressure, the prevalence of neuropsychiatric diseases gradually increases, and the neuroregulation treatment method gradually replaces the traditional treatment method such as taking medicine. The neuroregulation method can be divided into invasive and non-invasive, compared with the invasive neuroregulation method with greater risk, the non-invasive neuroregulation method is favored. The non-invasive neuroregulation method mainly has cervical transcranial magnetic stimulation and cervical transcranial electrical stimulation, compared with the cervical transcranial magnetic stimulation, the development and use of the cervical transcranial electrical stimulation device is relatively simple.

[0003] The existing transcranial electrical stimulation system controls the current value of the electrical stimulation signal to ensure that the current of the electrical stimulation is within a safe range, so that the stimulated person will not be harmed. However, due to the uncertainty of the system, such as system short circuit, open circuit and other factors, the stimulated person still has the risk of being stimulated by a large current. SUMMARY

[0004] Therefore, the present application provides an electroencephalogram acquisition and transcranial electrical stimulation system and device to reduce the risk of being stimulated by a large current.

[0005] The specific technical scheme of the first embodiment of the present application is: an electroencephalogram acquisition and transcranial electrical stimulation system, the system comprises: a central control module, a transcranial electrical stimulation module, an analog switch module, an electrode module and a current feedback module; the output end of the central control module is connected to the input end of the transcranial electrical stimulation module and the input end of the analog switch module, the central control module is used for sending an electrical stimulation control signal to the analog switch module and sending an electrical stimulation digital signal to the transcranial electrical stimulation module; the output end of the transcranial electrical stimulation module is connected to the input end of the analog switch module and the input end of the current feedback module, the transcranial electrical stimulation module is used for receiving the electrical stimulation digital signal, and generating an electrical stimulation signal after digital-to-analog conversion, signal amplification and signal filtering of the electrical stimulation digital signal; the output end of the analog switch module is connected to the electrode module, the analog switch module is used for receiving the electrical stimulation control signal to realize the conduction of the transcranial electrical stimulation module and the electrode module; the electrode module is used for electrical stimulation of the brain according to the electrical stimulation signal sent by the transcranial electrical stimulation module; the output end of the current feedback module is connected to the central control module, the current feedback module is used for acquiring the current value of the electrical stimulation signal sent by the transcranial electrical stimulation module, and obtaining a current digital signal by analog-to-digital conversion of the current value, and sending the current digital signal to the central control module; the central control module is also used for sending the current digital signal to a preset host computer to realize the monitoring of the current value.

[0006] Preferably, the system further comprises: an electroencephalogram signal acquisition module, an input end of the electroencephalogram signal acquisition module being connected to an output end of the analog switch module, and an output end of the electroencephalogram signal acquisition module being connected to an input end of the central control module; the central control module is further used to send an electroencephalogram acquisition signal to the analog switch module; an input end of the analog switch module is further connected to the electrode module, and the analog switch module is further used to receive the electroencephalogram acquisition signal to realize the conduction of the electroencephalogram signal acquisition module and the electrode module; the electrode module is further used to acquire an electroencephalogram signal and send the electroencephalogram signal to the electroencephalogram signal acquisition module; the electroencephalogram signal acquisition module is used to receive the electroencephalogram signal, perform signal conditioning and analog-to-digital conversion on the electroencephalogram signal to obtain an electroencephalogram digital signal, and send the electroencephalogram digital signal to the central control module; and the central control module is further used to send the electroencephalogram digital signal to a preset host computer to realize the monitoring of the electroencephalogram digital signal.

[0007] Preferably, the current feedback module comprises: a current detection module and a first analog-to-digital conversion module; an input end of the current detection module is connected to an output end of the transcranial electrical stimulation module, and an output end of the current detection module is connected to an input end of the first analog-to-digital conversion module; the current detection module is used to acquire a current value of the electrical stimulation signal, perform voltage conversion on the current value to obtain a current analog signal, and send the current analog signal to the first analog-to-digital conversion module; and an output end of the first analog-to-digital conversion module is connected to an input end of the central control module, and the first analog-to-digital conversion module is used to receive the current analog signal, perform analog-to-digital conversion on the current analog signal to obtain a current digital signal, and send the current digital signal to the central control module.

[0008] Preferably, the current detection module comprises a sampling resistor and a current acquisition module; one end of the sampling resistor is connected to the analog switch module, and the other end of the sampling resistor is connected to the transcranial electrical stimulation module; the sampling resistor is used to acquire the current of the electrical stimulation signal; and an output end of the current acquisition module is connected to an input end of the first analog-to-digital conversion module; the current acquisition module is used to acquire a current value of the sampling resistor, perform voltage conversion on the current value to obtain a current analog signal, and send the current analog signal to the first analog-to-digital conversion module.

[0009] Preferably, the brain electrical signal acquisition module comprises: a brain electrical signal acquisition module, a brain electrical signal conditioning module and a second analog-digital conversion module; the brain electrical signal acquisition module input end is connected with the analog switch module output end, the brain electrical signal acquisition module output end is connected with the brain electrical signal conditioning module input end, the brain electrical signal acquisition module is used for collecting brain electrical signals through the electrode module, and the brain electrical signals are sent to the brain electrical signal conditioning module; the brain electrical signal conditioning module output end is connected with the second analog-digital conversion module input end, the brain electrical signal conditioning module is used for receiving the brain electrical signals, and sending brain electrical analog signals to the second analog-digital conversion module; the second analog-digital conversion module output end is connected with the central control module input end, the second analog-digital conversion module is used for receiving the brain electrical analog signals, and performing analog-digital conversion on the brain electrical analog signals to obtain brain electrical digital signals, and sending the brain electrical digital signals to the central control module.

[0010] Preferably, the transcranial electrical stimulation module comprises: a digital-analog conversion module and an electrical stimulation signal processing module; the digital-analog conversion module input end is connected with the central control module output end, the digital-analog conversion module output end is connected with the electrical stimulation signal processing module input end, the digital-analog conversion module is used for receiving the electrical stimulation digital signals, and performing digital-analog conversion on the electrical stimulation digital signals to obtain electrical stimulation analog signals, and sending the electrical stimulation analog signals to the electrical stimulation signal processing module; the electrical stimulation signal processing module output end is connected with the analog switch input end, the electrical stimulation signal processing module is used for receiving the electrical stimulation analog signals, and performing signal amplification and signal filtering on the electrical stimulation analog signals to obtain electrical stimulation signals, and sending the electrical stimulation signals to the electrode module.

[0011] Preferably, the electrode module is a dual-purpose electrode, and the dual-purpose electrode comprises any one of a wet electrode, a semi-dry electrode and a dry electrode.

[0012] Preferably, the system further comprises a wireless transmission module, the wireless transmission module is connected with the central control module, and the wireless transmission module is used for receiving the current value and sending the current value to a preset host computer.

[0013] Preferably, the system further comprises a power module, the power module output end is connected with the central control module, the transcranial electrical stimulation module, the analog switch module, the electrode module, the current feedback module and the brain electrical signal acquisition module, and the power module is used for supplying power to the central control module, the transcranial electrical stimulation module, the analog switch module, the electrode module, the current feedback module and the brain electrical signal.

[0014] A specific technical scheme of the second embodiment of the application is: an electroencephalogram acquisition and transcranial electrical stimulation device, comprising the electroencephalogram acquisition and transcranial electrical stimulation system according to any one of the first embodiments of the application.

[0015] The embodiment of the application has the following beneficial effects:

[0016] The application comprises a central control module, a transcranial electrical stimulation module, an analog switch module, an electrode module and a current feedback module; the central control module sends an electrical stimulation control signal to the analog switch module and an electrical stimulation digital signal to the transcranial electrical stimulation module; the analog switch module receives the electrical stimulation control signal to realize the conduction between the transcranial electrical stimulation module and the electrode module; the transcranial electrical stimulation module receives the electrical stimulation digital signal and sends an electrical stimulation signal to the electrode module; the electrode module performs electrical stimulation on the brain according to the electrical stimulation signal; the current feedback module collects a current value of the electrical stimulation signal and sends a current digital signal to the central control module; the central control module also sends the current value to a preset host computer to realize the monitoring of the current value.

[0017] By arranging the current feedback module between the transcranial electrical stimulation module and the electrode module, the current flowing through the electrode module can be effectively detected, the current value of the electrical stimulation signal flowing through the electrode module is sent to the host computer by the central control module to realize the real-time monitoring of the current value, so as to prevent the damage to the stimulated person caused by long-time stimulation when the current value is too large and reduce the risk of the stimulated person being stimulated by a large current. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a structural diagram of an electroencephalogram acquisition and transcranial electrical stimulation system.

[0020] Figure 2 It is a structural diagram of an electroencephalogram signal acquisition module.

[0021] Figure 3 It is a schematic diagram of a current feedback module.

[0022] Figure 4 It is a schematic diagram of an electroencephalogram signal acquisition module.

[0023] Figure 5 It is a schematic diagram of a second analog-digital conversion module.

[0024] Figure 6 schematic diagram of a transcranial electrical stimulation module;

[0025] Figure 7 circuit diagram of a voltage conversion module;

[0026] Figure 8 circuit diagram of a current acquisition module;

[0027] Figure 9 circuit diagram of an electroencephalogram signal conditioning module;

[0028] Figure 10 schematic diagram of an analog switch;

[0029] In the figure, 101 is a central control module; 102 is a transcranial electrical stimulation module; 103 is an analog switch module; 104 is an electrode module; 105 is a current feedback module; 201 is an electroencephalogram signal acquisition module; 301 is a current detection module; 302 is a first analog-digital conversion module; 401 is an electroencephalogram acquisition module; 402 is an electroencephalogram signal conditioning module; 403 is a second analog-digital conversion module; 501 is a digital-analog conversion module; and 502 is an electrical stimulation signal processing module.

DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0031] Please refer to Figure 1As shown in Fig. 1, which is a structural diagram of a brain electrical signal acquisition and transcranial electrical stimulation system according to the first embodiment of the present application, the system comprises a central control module 101, a transcranial electrical stimulation module 102, an analog switch module 103, an electrode module 104, and a current feedback module 105. The output end of the central control module 101 is connected to the input end of the transcranial electrical stimulation module 102 and the input end of the analog switch module 103. The central control module 101 is configured to send an electrical stimulation control signal to the analog switch module 103 and an electrical stimulation digital signal to the transcranial electrical stimulation module 102. The output end of the transcranial electrical stimulation module 102 is connected to the input end of the analog switch module 103 and the input end of the current feedback module 105. The transcranial electrical stimulation module 102 is configured to receive the electrical stimulation digital signal, and generate an electrical stimulation signal after digital-to-analog conversion, signal amplification, and signal filtering of the electrical stimulation digital signal. The output end of the analog switch module 103 is connected to the electrode module 104. The analog switch module 103 is configured to receive the electrical stimulation control signal, so as to realize conduction between the transcranial electrical stimulation module 102 and the electrode module 104. The electrode module 104 is configured to perform electrical stimulation on the brain according to the electrical stimulation signal sent by the transcranial electrical stimulation module. The output end of the current feedback module 105 is connected to the central control module 101. The current feedback module 105 is configured to acquire a current value of the electrical stimulation signal sent by the transcranial electrical stimulation module, and obtain a current digital signal after analog-to-digital conversion of the current value, and send the current digital signal to the central control module 101. The central control module 101 is further configured to send the current digital signal to a preset host computer, so as to realize monitoring of the current value.

[0032] Specifically, the central control module 101 sends an electrical stimulation control signal to the analog switch module 103 and an electrical stimulation digital signal to the transcranial electrical stimulation module 102. The electrical stimulation digital signal at least includes an electrical stimulation time and an electrical stimulation frequency. The transcranial electrical stimulation module 102 is configured to receive the electrical stimulation digital signal, and generate an electrical stimulation signal after digital-to-analog conversion, signal amplification, and signal filtering of the electrical stimulation digital signal. The electrode module 104 performs electrical stimulation on the brain according to the electrical stimulation signal. The analog switch module 103 receives the electrical stimulation control signal, so as to realize conduction between the transcranial electrical stimulation module 102 and the electrode module 104. Specifically, the analog switch module 103 controls conduction of different pins of the analog switch module 103 by receiving a high level or a low level of the electrical stimulation control signal, so as to realize conduction between the transcranial electrical stimulation module 102 and the electrode module 104. The current feedback module 105 acquires a current value of the electrical stimulation signal sent by the transcranial electrical stimulation module, and obtains a current digital signal after analog-to-digital conversion of the current value, and sends the current digital signal to the central control module 101. The central control module 101 sends the current digital signal to a preset host computer, so as to realize monitoring of the current value.

[0033] By setting the current feedback module 105 between the transcranial electrical stimulation module 102 and the electrode module 104, the current flowing through the electrode module 104 can be effectively detected, and the current value of the electrical stimulation signal flowing through the electrode module 104 is sent to the upper computer through the central control module 101, so that the current value is monitored in real time to prevent the stimulator from being stimulated for a long time when the current value is too large, thereby reducing the risk of the stimulator being stimulated by a large current.

[0034] In specific embodiments, please refer to Figure 2 , the system further comprises: an electroencephalogram signal acquisition module 201, the input end of the electroencephalogram signal acquisition module 201 is connected to the output end of the analog switch module 103, and the output end of the electroencephalogram signal acquisition module 201 is connected to the input end of the central control module 101; the central control module 101 is also used to send the electroencephalogram acquisition signal to the analog switch module 103; the input end of the analog switch module 103 is also connected to the electrode module 104, and the analog switch module 103 is also used to receive the electroencephalogram acquisition signal to realize the conduction of the electroencephalogram signal acquisition module 201 and the electrode module 104; the electrode module 104 is also used to collect the electroencephalogram signal and send the electroencephalogram signal to the electroencephalogram signal acquisition module 201; the electroencephalogram signal acquisition module 201 is used to receive the electroencephalogram signal, and the electroencephalogram signal is signal-conditioned and analog-digital converted to obtain an electroencephalogram digital signal, and the electroencephalogram digital signal is sent to the central control module 101; the central control module 101 is also used to send the electroencephalogram digital signal to a preset upper computer to realize the monitoring of the electroencephalogram digital signal.

[0035] Specifically, the central control module 101 sends the electroencephalogram acquisition signal to the analog switch module 103; the analog switch module 103 receives the high level or low level of the electroencephalogram acquisition signal, controls the conduction of different pins of the analog switch module 103, to realize the conduction of the electroencephalogram signal acquisition module 201 and the electrode module 104; the electrode module 104 collects the electroencephalogram signal and sends the electroencephalogram signal to the electroencephalogram signal acquisition module 201; the electroencephalogram signal acquisition module 201 receives the electroencephalogram signal, and the electroencephalogram signal is signal-conditioned and analog-digital converted to obtain an electroencephalogram digital signal, and the electroencephalogram digital signal is sent to the central control module 101; the central control module 101 is also used to send the electroencephalogram digital signal to a preset upper computer to realize the monitoring of the electroencephalogram digital signal. Wherein, the electroencephalogram signal acquisition module 201 adopts ADS1299 chip, which can realize multi-channel acquisition such as 16 channels, 32 channels, 64 channels, etc. by daisy chain connection, to ensure the real-time performance of the electroencephalogram signal acquisition.

[0036] In specific embodiments, the electrode module 104 is a dual-purpose electrode, which includes any one of a wet electrode, a semi-dry electrode and a dry electrode. When the wet electrode is selected, the subject is required to use conductive paste or physiological saline to increase the direct connectivity between the scalp and the electrode module 104, so as to ensure that the real brain electrical signals can be collected.

[0037] In specific embodiments, referring to Figure 3 , the current feedback module 105 includes a current detection module 301 and a first analog-digital conversion module 302. The input end of the current detection module 301 is connected to the output end of the transcranial electrical stimulation module 102, and the output end of the current detection module 301 is connected to the input end of the first analog-digital conversion module 302. The current detection module 301 is used to collect the current value of the electrical stimulation signal, to perform voltage conversion on the current value to obtain a current analog signal, and to send the current analog signal to the first analog-digital conversion module 302. The first analog-digital conversion module 302 is connected to the input end of the central control module 101. The first analog-digital conversion module 302 is used to receive the current analog signal, to perform analog-digital conversion on the current analog signal to obtain a current digital signal, and to send the current digital signal to the central control module 101.

[0038] Specifically, the current detection module 301 collects the current value of the electrical stimulation signal, performs voltage conversion on the current value to obtain a current analog signal, and sends the current analog signal to the first analog-digital conversion module 302. The first analog-digital conversion module 302 receives the current analog signal, performs analog-digital conversion on the current analog signal to obtain a current digital signal, and sends the current digital signal to the central control module 101. Through real-time monitoring of the current digital signal, the stimulation process can be safely controlled, and the safety of the subject can be better protected.

[0039] In specific embodiments, the current detection module 301 includes a sampling resistor and a current collection module. One end of the sampling resistor is connected to the analog switch module 103, and the other end of the sampling resistor is connected to the transcranial electrical stimulation module 102. The sampling resistor obtains the current of the electrical stimulation signal. The output end of the current collection module is connected to the input end of the first analog-digital conversion module 302. The current collection module is used to collect the current value of the sampling resistor, to perform voltage conversion on the current value to obtain a current analog signal, and to send the current analog signal to the first analog-digital conversion module 302. Specifically, the sampling resistor is arranged between the analog switch module 103 and the transcranial electrical stimulation module 102. The sampling resistor is a high-precision sampling resistor, which can effectively reflect the current of the electrical stimulation signal.

[0040] In specific embodiments, referring to Figure 4, the electroencephalogram signal acquisition module 201 comprises: an electroencephalogram acquisition module 401, an electroencephalogram signal conditioning module 402 and a second analog-digital conversion module 403; the input end of the electroencephalogram acquisition module 401 is connected to the output end of the analog switch module 103, the output end of the electroencephalogram acquisition module 401 is connected to the input end of the electroencephalogram signal conditioning module 402, the electroencephalogram acquisition module 401 is used for collecting electroencephalogram signals through the electrode module 104 and sending the electroencephalogram signals to the electroencephalogram signal conditioning module 402; the output end of the electroencephalogram signal conditioning module 402 is connected to the input end of the second analog-digital conversion module 403, the electroencephalogram signal conditioning module 402 is used for receiving electroencephalogram signals and sending electroencephalogram analog signals to the second analog-digital conversion module 403; the output end of the second analog-digital conversion module 403 is connected to the input end of the central control module 101, the second analog-digital conversion module 403 is used for receiving electroencephalogram analog signals, performing analog-digital conversion on the electroencephalogram analog signals to obtain electroencephalogram digital signals and sending the electroencephalogram digital signals to the central control module 101.

[0041] Specifically, the electroencephalogram acquisition module 401 is used for collecting electroencephalogram signals through the electrode module 104 and sending the electroencephalogram signals to the electroencephalogram signal conditioning module 402; the electroencephalogram signal conditioning module 402 is used for receiving electroencephalogram signals, performing signal conditioning on the electroencephalogram signals to obtain electroencephalogram analog signals and sending the electroencephalogram analog signals to the second analog-digital conversion module 403; the second analog-digital conversion module 403 is used for receiving electroencephalogram analog signals, performing analog-digital conversion on the electroencephalogram analog signals to obtain electroencephalogram digital signals recognizable by the central control module 101 and sending the electroencephalogram digital signals to the central control module 101. Wherein, the electrode module 104 can be set in multiple groups according to actual needs, and the electroencephalogram acquisition module 401 and the electrode module 104 are used to realize the collection of electroencephalogram signals of the stimulated person and realize the multi-channel electroencephalogram signal collection of the stimulated person. Wherein, the schematic diagram of the second analog-digital conversion module 403 is shown in Figure 5 .

[0042] In specific embodiments, please refer to Figure 6 The transcranial electrical stimulation module 102 comprises: a digital-analog conversion module 501 and an electrical stimulation signal processing module 502; the input end of the digital-analog conversion module 501 is connected to the output end of the central control module 101, the output end of the digital-analog conversion module 501 is connected to the input end of the electrical stimulation signal processing module 502, the digital-analog conversion module 501 is used for receiving electrical stimulation digital signals, performing digital-analog conversion on the electrical stimulation digital signals to obtain electrical stimulation analog signals and sending the electrical stimulation analog signals to the electrical stimulation signal processing module 502; the output end of the electrical stimulation signal processing module 502 is connected to the input end of the analog switch, the electrical stimulation signal processing module 502 is used for receiving electrical stimulation analog signals, performing signal amplification and signal filtering on the electrical stimulation analog signals to obtain electrical stimulation signals and sending the electrical stimulation signals to the electrode module 104.

[0043] Specifically, the digital-to-analog conversion module receives the digital electric stimulation signal, and performs digital-to-analog conversion on the digital electric stimulation signal to obtain an electric stimulation analog signal recognizable by the electric stimulation signal processing module 502, and sends the electric stimulation analog signal to the electric stimulation signal processing module 502; the electric stimulation signal processing module 502 receives the electric stimulation analog signal, and performs signal amplification and signal filtering on the electric stimulation analog signal to obtain an electric stimulation signal, and sends the electric stimulation signal to the electrode module 104. Through the conversion of the digital-to-analog conversion module 501 and the electric stimulation signal processing module 502, the digital electric stimulation signal is converted into the electric stimulation signal, and the electric stimulation signal is used to electrically stimulate the stimulated object through the electrode module 104, so as to realize precise electric stimulation treatment.

[0044] In specific embodiments, the system further comprises a wireless transmission module, the wireless transmission module is connected to the central control module 101, and the wireless transmission module is used to receive the current value and send the current value to the preset host computer. Specifically, the wireless transmission module is an ESP8266 chip. By using the wireless transmission module, the current value is sent to the preset host computer, so that the current value can be easily viewed.

[0045] In specific embodiments, the system further comprises a power module, the output end of the power module is connected to the central control module 101, the transcranial electric stimulation module 102, the analog switch module 103, the electrode module 104, the current feedback module 105 and the electroencephalogram signal acquisition module 201, and the power module is used to supply power to the central control module 101, the transcranial electric stimulation module 102, the analog switch module 103, the electrode module 104, the current feedback module 105 and the electroencephalogram signal. The power module can be rechargeable or portable.

[0046] Specifically, please refer to Figure 7 The system further comprises a voltage conversion module, the input end of the voltage conversion module is connected to the power module, the output end of the voltage conversion module is connected to the electroencephalogram signal acquisition module 201, and the voltage conversion module is used to convert the voltage output by the power module into a stable 2.5V voltage. The voltage conversion module comprises a first capacitor C62, a second capacitor C63, a third capacitor C64, a fourth capacitor C65, a fifth capacitor C66, a voltage conversion chip U7 and a first inductor L3. One end of the fourth capacitor C65, the 3 pin and the 1 pin of the voltage conversion chip U7 are connected to the output end of the power module, the other end of the fourth capacitor C65 is grounded and connected to the 2 pin of the voltage conversion chip U7, the 5 pin of the voltage conversion chip U7 is respectively connected to one end of the first capacitor C62, one end of the second capacitor C63 and one end of the first inductor L3, the other end of the first capacitor C62 is connected to the other end of the second capacitor C63, the other end of the first inductor L3 is respectively connected to one end of the third capacitor C64 and the electroencephalogram signal acquisition module 201, the other end of the third capacitor C64 is grounded, and the 4 pin of the voltage conversion chip U7 is connected to one end of the fifth capacitor C66. The other end of the fifth capacitor C66 is grounded.

[0047] In specific embodiments, referring to Figure 8 , the current acquisition module comprises a current acquisition chip U8 and a sixth capacitor C49, wherein the 2 pin of the current acquisition chip U8 is grounded, the 3 pin of the current acquisition chip U8 is connected with a sampling resistor, the 5 pin of the current acquisition chip U8 is connected with one end of the power module and the sixth capacitor C49 respectively, the other end of the sixth capacitor C49 is grounded, and the other end of the current acquisition chip U8 is connected with the first analog-digital conversion module 302.

[0048] In specific embodiments, referring to Figure 9 , the EEG signal conditioning module 402 comprises an EEG signal conditioning chip U8, a seventh capacitor C21, an eighth capacitor C18, a first resistor R14, a second resistor R15 and a third resistor R21, the 2 pin and the 3 pin of the EEG signal conditioning chip U8 are connected with the EEG acquisition module 401, the 4 pin of the EEG signal conditioning chip U8 is grounded and connected with one end of the seventh capacitor C21 respectively, the other end of the seventh capacitor C21 is grounded, the 5 pin of the EEG signal conditioning chip U8 is grounded, the 6 pin of the EEG signal conditioning chip U8 is connected with the second analog-digital conversion module 403, the 7 pin of the EEG signal conditioning chip U8 is connected with the power module and connected with one end of the eighth capacitor C18, the other end of the eighth capacitor C18 is grounded, the 1 pin of the EEG signal conditioning chip U8 is connected with one end of the first resistor R14 and one end of the third resistor R21 respectively, the other end of the first resistor R14 is connected with one end of the second resistor R15, and the other end of the second resistor R15 and the other end of the third resistor R21 are connected with the 8 pin of the EEG signal conditioning chip U8.

[0049] In specific embodiments, referring to Figure 10 , the analog switch module 103 realizes different channel connections by controlling the levels of the three control pins A0 / A1 / A2, controls S0-S7 and D pins to be conducted, and only one pin can be connected with the D interface at any time.

[0050] In specific embodiments, the second embodiment of the present application provides an EEG acquisition and transcranial electrical stimulation device, comprising the EEG acquisition and transcranial electrical stimulation system according to any one of the first embodiments of the present application. By using the device, real-time monitoring of the current value is realized to prevent the stimulator from being stimulated for a long time when the current value is too large, thereby reducing the risk of the stimulator being stimulated by a large current.

[0051] The technical features of the above embodiments can be combined in any manner, and to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0052] The above embodiments only express several implementation ways of the present application, and the description is specific and detailed, but it should not be understood as a limitation to the patent scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application is subject to the appended claims.

Claims

1. A brainwave acquisition and transcranial electrical stimulation system, characterized in that, The system includes: a central control module, a transcranial electrical stimulation module, an analog switch module, an electrode module, and a current feedback module; The output terminal of the central control module is connected to the input terminal of the transcranial electrical stimulation module and the input terminal of the analog switch module. The central control module is used to send electrical stimulation control signals to the analog switch module and to send electrical stimulation digital signals to the transcranial electrical stimulation module. The output terminal of the transcranial electrical stimulation module is connected to the input terminal of the analog switch module and the input terminal of the current feedback module. The transcranial electrical stimulation module is used to receive the electrical stimulation digital signal and generate an electrical stimulation signal after performing digital-to-analog conversion, signal amplification and signal filtering on the electrical stimulation digital signal. The output terminal of the analog switch module is connected to the electrode module. The analog switch module is used to receive the electrical stimulation control signal to enable the transcranial electrical stimulation module and the electrode module to conduct. The analog switch module controls the conduction of different pins of the analog switch module by receiving the high or low level of the electrical stimulation control signal, thereby enabling the transcranial electrical stimulation module and the electrode module to conduct. The electrode module is used to electrically stimulate the brain according to the electrical stimulation signal sent by the transcranial electrical stimulation module; The output terminal of the current feedback module is connected to the central control module. The current feedback module is used to collect the current value of the electrical stimulation signal sent by the transcranial electrical stimulation model, perform analog-to-digital conversion on the current value to obtain a digital current signal, and send the digital current signal to the central control module. The central control module is also used to send the current digital signal to a preset host computer to monitor the current value; The system further includes: an electroencephalogram (EEG) signal acquisition module, wherein the input terminal of the EEG signal acquisition module is connected to the output terminal of the analog switch module, and the output terminal of the EEG signal acquisition module is connected to the input terminal of the central control module; The central control module is also used to send EEG acquisition signals to the analog switch module; The input terminal of the analog switch module is also connected to the electrode module. The analog switch module is also used to receive the EEG acquisition signal to enable the EEG signal acquisition module to conduct to the electrode module. The electrode module is also used to acquire electroencephalogram (EEG) signals and send the EEG signals to the EEG signal acquisition module. The EEG signal acquisition module is used to receive the EEG signal, perform signal conditioning and analog-to-digital conversion on the EEG signal to obtain the EEG digital signal, and send the EEG digital signal to the central control module. The central control module is also used to send the EEG digital signal to a preset host computer to monitor the EEG digital signal.

2. The EEG acquisition and transcranial electrical stimulation system as described in claim 1, characterized in that, The current feedback module includes: a current detection module and a first analog-to-digital conversion module; The input terminal of the current detection module is connected to the output terminal of the transcranial electrical stimulation module, and the output terminal of the current detection module is connected to the input terminal of the first analog-to-digital conversion module. The current detection module is used to collect the current value of the electrical stimulation signal, convert the current value into a voltage to obtain a current analog signal, and send the current analog signal to the first analog-to-digital conversion module. The output terminal of the first analog-to-digital converter module is connected to the input terminal of the central control module. The first analog-to-digital converter module is used to receive the current analog signal, perform analog-to-digital conversion on the current analog signal to obtain a current digital signal, and send the current digital signal to the central control module.

3. The EEG acquisition and transcranial electrical stimulation system as described in claim 2, characterized in that: The current detection module includes a sampling resistor and a current acquisition module; One end of the sampling resistor is connected to the analog switch module, and the other end of the sampling resistor is connected to the transcranial electrical stimulation module. The sampling resistor is used to acquire the current of the electrical stimulation signal. The output terminal of the current acquisition module is connected to the input terminal of the first analog-to-digital converter module. The current acquisition module is used to acquire the current value of the sampling resistor, perform voltage conversion on the current value to obtain a current analog signal, and send the current analog signal to the first analog-to-digital converter module.

4. The EEG acquisition and transcranial electrical stimulation system as described in claim 1, characterized in that, The EEG signal acquisition module includes: an EEG acquisition module, an EEG signal conditioning module, and a second analog-to-digital conversion module; The input terminal of the EEG acquisition module is connected to the output terminal of the analog switch module, and the output terminal of the EEG acquisition module is connected to the input terminal of the EEG signal conditioning module. The EEG acquisition module is used to acquire EEG signals through the electrode module and send the EEG signals to the EEG signal conditioning module. The output terminal of the EEG signal conditioning module is connected to the input terminal of the second analog-to-digital converter module. The EEG signal conditioning module is used to receive the EEG signal and send the EEG analog signal to the second analog-to-digital converter module. The output terminal of the second analog-to-digital converter is connected to the input terminal of the central control module. The second analog-to-digital converter is used to receive the EEG analog signal, perform analog-to-digital conversion on the EEG analog signal to obtain the EEG digital signal, and send the EEG digital signal to the central control module.

5. The EEG acquisition and transcranial electrical stimulation system as described in claim 1, characterized in that, The transcranial electrical stimulation module includes: a digital-to-analog conversion module and an electrical stimulation signal processing module; The input terminal of the digital-to-analog converter module is connected to the output terminal of the central control module, and the output terminal of the digital-to-analog converter module is connected to the input terminal of the electrical stimulation signal processing module. The digital-to-analog converter module is used to receive the electrical stimulation digital signal, perform digital-to-analog conversion on the electrical stimulation digital signal to obtain an electrical stimulation analog signal, and send the electrical stimulation analog signal to the electrical stimulation signal processing module. The output terminal of the electrical stimulation signal processing module is connected to the input terminal of the analog switch module. The electrical stimulation signal processing module is used to receive the electrical stimulation analog signal, amplify and filter the electrical stimulation analog signal to obtain the electrical stimulation signal, and send the electrical stimulation signal to the electrode module.

6. The EEG acquisition and transcranial electrical stimulation system as described in claim 1, characterized in that: The electrode module is a dual-purpose electrode, which includes any one of the following: wet electrode, semi-dry electrode, and dry electrode.

7. The EEG acquisition and transcranial electrical stimulation system as described in claim 1, characterized in that: The system also includes a wireless transmission module, which is connected to the central control module. The wireless transmission module is used to receive the current value and send the current value to a preset host computer.

8. The EEG acquisition and transcranial electrical stimulation system as described in claim 1, characterized in that: The system also includes a power supply module, the output of which is connected to the central control module, the transcranial electrical stimulation module, the analog switch module, the electrode module, the current feedback module, and the electroencephalogram (EEG) signal acquisition module. The power supply module is used to supply power to the central control module, the transcranial electrical stimulation module, the analog switch module, the electrode module, the current feedback module, and the EEG signal.

9. A device for acquiring electroencephalogram (EEG) data and transcranial electrical stimulation (TCS), characterized in that: Includes the EEG acquisition and transcranial electrical stimulation system as described in any one of claims 1-8.

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