CN221014192U - Electroencephalogram acquisition and transcranial electric stimulation system and equipment - Google Patents
Electroencephalogram acquisition and transcranial electric stimulation system and equipment Download PDFInfo
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- 238000006243 chemical reaction Methods 0.000 claims description 80
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Abstract
The embodiment of the application discloses an electroencephalogram acquisition and transcranial electric stimulation system and equipment, which can effectively detect current flowing through an electrode module by arranging a current feedback module between the transcranial electric stimulation module and the electrode module, and send a current value of an electric stimulation signal flowing through the electrode module to an upper computer by a central control module so as to realize real-time monitoring of the current value, thereby preventing a stimulated person from being damaged due to long-time stimulation when the current value is overlarge, and reducing the risk of the stimulated person receiving larger current stimulation.
Description
[ Field of technology ]
The utility model relates to the field of medical appliances, in particular to an electroencephalogram acquisition and transcranial electric stimulation system and equipment.
[ Background Art ]
Nerve modulation may be classified into invasive and non-invasive, and non-invasive nerve modulation is favored over invasive nerve modulation with a greater risk. The non-invasive nerve regulation and control mode mainly comprises cervical cranium magnetic stimulation and cervical cranium electric stimulation, and compared with the cervical cranium magnetic stimulation, the cervical cranium electric stimulation equipment is simpler to develop and use.
The current value of the electric stimulation signal is controlled by the existing transcranial electric stimulation system to ensure that the electric stimulation current is in a safe range, so that the stimulated current is not damaged. However, due to the uncertainty of the system, such as short circuit, open circuit and other factors of the system, the risk that the stimulated person is stimulated by a large current still exists.
[ Invention ]
In view of the above, the present utility model provides an electroencephalogram acquisition and transcranial electric stimulation system and apparatus to reduce the risk of a stimulated person being stimulated by a large current.
The specific technical scheme of the first embodiment of the utility model is as follows: an electroencephalogram acquisition and transcranial electrical stimulation system, the system comprising: the device comprises a central control module, a transcranial electric stimulation module, an analog switch module, an electrode module and a current feedback module; the output end of the central control module is connected with the input end of the transcranial electric stimulation module and the input end of the analog switch module, and the central control module is used for sending electric stimulation control signals to the analog switch module and sending electric stimulation digital signals to the transcranial electric stimulation module; the output end of the transcranial electric stimulation module is connected with the input end of the analog switch module and the input end of the current feedback module, and the transcranial electric stimulation module is used for receiving the electric stimulation digital signal and sending an electric stimulation signal; the output end of the analog switch module is connected with the electrode module, and the analog switch module is used for receiving the electric stimulation control signal so as to realize the conduction of the transcranial electric stimulation module and the electrode module; the electrode module is used for receiving an electric stimulation signal so as to complete electric stimulation; the output end of the current feedback module is connected with the central control module, and the current feedback module is used for collecting the current value of the electric stimulation signal sent by the transcranial electric stimulation module and sending a current digital signal to the central control module; the central control module is also used for sending the current digital signal to a preset upper computer so as to realize the monitoring of the current value.
Preferably, the system further comprises: the input end of the electroencephalogram signal acquisition module is connected with the output end of the analog switch module, and the output end of the electroencephalogram signal acquisition module is connected with the input end of the central control module; the central control module is also used for sending an electroencephalogram acquisition signal to the analog switch module; the input end of the analog switch module is also connected with the electrode module, and the analog switch module is also used for receiving the electroencephalogram acquisition signal so as to realize the conduction of the electroencephalogram acquisition module and the electrode module; the electrode module is also used for collecting an electroencephalogram signal and sending the electroencephalogram signal to the electroencephalogram signal acquisition module; the electroencephalogram signal acquisition module is used for receiving the electroencephalogram signal and sending an electroencephalogram digital signal to the central control module; the central control module is also used for sending the electroencephalogram digital signal to a preset upper computer so as to monitor the electroencephalogram digital signal.
Preferably, the current feedback module includes: the device comprises a current detection module and a first analog-to-digital conversion module; the input end of the current detection module is connected with the output end of the transcranial electric stimulation module, the output end of the current detection module is connected with the input end of the first analog-to-digital conversion module, and the current detection module is used for collecting the current value of the electric stimulation signal and sending a current analog signal to the first analog-to-digital conversion module; the output end of the first analog-to-digital conversion module is connected with the input end of the central control module, and the first analog-to-digital conversion module is used for receiving the current analog signal and sending a current digital signal to the central control module.
Preferably, the current detection module comprises a sampling resistor and a current acquisition module; one end of the sampling resistor is connected with the analog switch module, the other end of the sampling resistor is connected with the transcranial electric stimulation module, and the sampling resistor is used for acquiring the current of the electric stimulation signal; the current acquisition module input end is connected with the sampling resistor, the current acquisition module output end is connected with the first analog-to-digital conversion module input end, and the current acquisition module is used for acquiring the current value of the sampling resistor and sending a current analog signal to the first analog-to-digital conversion module.
Preferably, the electroencephalogram signal acquisition module includes: the device comprises an electroencephalogram acquisition module, an electroencephalogram signal conditioning module and a second analog-to-digital conversion module; the input end of the electroencephalogram acquisition module is connected with the output end of the analog switch module, the output end of the electroencephalogram acquisition module is connected with the input end of the electroencephalogram conditioning module, and the electroencephalogram acquisition module is used for acquiring electroencephalogram signals and sending the electroencephalogram signals to the electroencephalogram conditioning module; the output end of the electroencephalogram signal conditioning module is connected with the input end of the second analog-to-digital conversion module, and the electroencephalogram signal conditioning module is used for receiving the electroencephalogram signal and sending an electroencephalogram analog signal to the second analog-to-digital conversion module; the output end of the second analog-to-digital conversion module is connected with the input end of the central control module, and the second analog-to-digital conversion module is used for receiving the brain electrical analog signals and sending brain electrical digital signals to the central control module.
Preferably, the transcranial electrical stimulation module comprises: the digital-to-analog conversion module and the electric stimulation signal processing module; the digital-to-analog conversion module input end is connected with the central control module output end, the digital-to-analog conversion module output end is connected with the electric stimulation signal processing module input end, and the digital-to-analog conversion module is used for receiving the electric stimulation digital signal and sending an electric stimulation analog signal to the electric stimulation signal processing module; the output end of the electric stimulation signal processing module is connected with the input end of the analog switch, and the electric stimulation signal processing module is used for receiving the electric stimulation analog signal and sending the electric stimulation signal.
Preferably, the electrode module is a dual-purpose electrode, and the dual-purpose electrode comprises any one electrode of a wet electrode, a semi-dry electrode and a dry electrode.
Preferably, the system further comprises a wireless transmission module, wherein 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 upper computer.
Preferably, the system further comprises a power module, wherein the output end of the power module is connected with the central control module, the transcranial electric stimulation module, the analog switch module, the electrode module, the current feedback module and the electroencephalogram signal acquisition module, and the power module is used for supplying power to the central control module, the transcranial electric stimulation module, the analog switch module, the electrode module, the current feedback module and the electroencephalogram signal.
The specific technical scheme of the second embodiment of the utility model is as follows: an electroencephalogram acquisition and transcranial electric stimulation device is characterized in that: comprising an electroencephalogram acquisition and transcranial electrical stimulation system according to any of the first embodiments of the present utility model.
The implementation of the embodiment of the utility model has the following beneficial effects:
The utility model comprises a central control module, a transcranial electric stimulation module, an analog switch module, an electrode module and a current feedback module; the central control module sends an electric stimulation control signal to the analog switch module and sends an electric stimulation digital signal to the transcranial electric stimulation module; the analog switch module receives the electric stimulation control signal to realize the conduction of the transcranial electric stimulation module and the electrode module; the transcranial electric stimulation module receives the electric stimulation digital signal and sends the electric 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 the current value of the electric 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 upper computer so as to realize the monitoring of the current value.
Through setting up the electric current feedback module in the middle of transcranial electric stimulation module and electrode module, can effectually detect the electric current that flows through electrode module, send the current value of the electric stimulation signal that flows through electrode module to the host computer through central control module, realize the real-time supervision to the current value to still carry out long-time stimulation to the person being stimulated and cause the person being stimulated to damage when preventing that the current value is too big, reduce the risk that the person being stimulated receives great electric current stimulation.
[ Description of the drawings ]
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of an electroencephalogram acquisition and transcranial electrical stimulation system;
Fig. 2 is a schematic diagram of an electroencephalogram signal acquisition module structure;
FIG. 3 is a schematic diagram of a current feedback module;
Fig. 4 is a schematic diagram of an electroencephalogram signal acquisition module;
FIG. 5 is a schematic diagram of a second analog-to-digital conversion module;
FIG. 6 is a schematic diagram of a transcranial electrical stimulation module;
FIG. 7 is a circuit diagram of a voltage conversion module;
FIG. 8 is a circuit diagram of a current collection module;
FIG. 9 is a circuit diagram of an electroencephalogram signal conditioning module;
FIG. 10 is a schematic diagram of an analog switch;
101, a central control module; 102. a transcranial electrical stimulation module; 103. an analog switch module; 104. an electrode module; 105. a current feedback module; 201. an electroencephalogram signal acquisition module; 301. a current detection module; 302. a first analog-to-digital conversion module; 401. an electroencephalogram acquisition module; 402. an electroencephalogram signal conditioning module; 403. a second analog-to-digital conversion module; 501. a digital-to-analog conversion module; 502. and the electrical stimulation signal processing module.
[ Detailed description ] of the invention
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, which is a block diagram of an electroencephalogram acquisition and transcranial electric stimulation system according to a first embodiment of the present application, for reducing the risk of a stimulated person being stimulated by a larger current, the system includes: 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 with the input end of the transcranial electric stimulation module 102 and the input end of the analog switch module 103, and the central control module 101 is used for sending electric stimulation control signals to the analog switch module 103 and electric stimulation digital signals to the transcranial electric stimulation module 102; the output end of the transcranial electric stimulation module 102 is connected with the input end of the analog switch module 103 and the input end of the current feedback module 105, and the transcranial electric stimulation module 102 is used for receiving electric stimulation digital signals and sending electric stimulation signals; the output end of the analog switch module 103 is connected with the electrode module 104, and the analog switch module 103 is used for receiving an electric stimulation control signal so as to realize the conduction of the transcranial electric stimulation module 102 and the electrode module 104; the electrode module 104 is used for receiving the electrical stimulation signal to complete the electrical stimulation; the output end of the current feedback module 105 is connected with the central control module 101, and the current feedback module 105 is used for collecting the current value of the electric stimulation signal sent by the transcranial electric stimulation module and sending a current digital signal to the central control module 101; the central control module 101 is further configured to send a current digital signal to a preset upper computer, so as to monitor a current value.
Specifically, the central control module 101 sends an electrical stimulation control signal to the analog switch module 103 and sends an electrical stimulation digital signal to the transcranial electrical stimulation module 102, where the electrical stimulation digital signal at least includes electrical stimulation time, electrical stimulation frequency, and the like; the transcranial electric stimulation module 102 is used for receiving electric stimulation digital signals, generating electric stimulation signals after digital-to-analog conversion, signal amplification and signal filtering of the electric stimulation digital signals, and the electrode module 104 electrically stimulates the brain according to the electric stimulation signals; the analog switch module 103 receives the electric stimulation control signal to realize the conduction of the transcranial electric stimulation module 102 and the electrode module 104, and specifically, the analog switch module 103 controls the conduction of different pins of the analog switch module 103 by receiving the high level or the low level of the electric stimulation control signal to realize the conduction of the transcranial electric stimulation module 102 and the electrode module 104; the current feedback module 105 collects the current value of the electric stimulation signal sent by the transcranial electric stimulation module, performs analog-to-digital conversion on the current value to obtain a current digital signal, 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 upper computer to realize the monitoring of the current value.
Through setting up the electric current feedback module 105 in the middle of transcranial electric stimulation module 102 and electrode module 104, can effectually detect the electric current that flows through electrode module 104, send the current value of the electric stimulation signal that flows through electrode module 104 to the host computer through central control module 101, realize the real-time supervision to the current value to still carry out long-time stimulation to the person being stimulated and cause the person being stimulated to damage when preventing that the current value is too big, reduce the risk that the person being stimulated receives great electric current stimulation.
In an embodiment, referring to fig. 2, the system further includes: the input end of the electroencephalogram signal acquisition module 201 is connected with the output end of the analog switch module 103, and the output end of the electroencephalogram signal acquisition module 201 is connected with the input end of the central control module 101; the central control module 101 is further configured to send an electroencephalogram acquisition signal to the analog switch module 103; the input end of the analog switch module 103 is also connected with the electrode module 104, and the analog switch module 103 is also used for receiving an electroencephalogram acquisition signal so as to realize the conduction of the electroencephalogram acquisition module 201 and the electrode module 104; the electrode module 104 is further configured to collect an electroencephalogram signal, and send the electroencephalogram signal to the electroencephalogram signal acquisition module 201; the electroencephalogram signal acquisition module 201 is configured to receive an electroencephalogram signal and send an electroencephalogram digital signal to the central control module 101; the central control module 101 is further configured to send the electroencephalogram digital signal to a preset upper computer, so as to monitor the electroencephalogram digital signal.
Specifically, the central control module 101 sends an electroencephalogram acquisition signal to the analog switch module 103; the analog switch module 103 receives the high level or the low level of the electroencephalogram acquisition signal, and controls the conduction of different pins of the analog switch module 103 so as to realize the conduction of the electroencephalogram acquisition module 201 and the electrode module 104; the electrode module 104 collects the brain electrical signals and sends the brain electrical signals to the brain electrical signal acquisition module 201; the electroencephalogram signal acquisition module 201 receives an electroencephalogram signal, performs signal conditioning and analog-to-digital conversion on the electroencephalogram signal to obtain an electroencephalogram digital signal, and sends the electroencephalogram digital signal to the central control module 101; the central control module 101 is further configured to send the electroencephalogram digital signal to a preset upper computer, so as to monitor the electroencephalogram digital signal. The electroencephalogram signal acquisition module 201 adopts an ADS1299 chip, and the chip can realize multi-channel acquisition in a daisy chain mode, such as 16 channels, 32 channels, 64 channels and the like, so that the instantaneity of electroencephalogram signal acquisition is ensured.
In a specific embodiment, the electrode module 104 is a dual-purpose electrode including any one of a wet electrode, a semi-dry electrode, and a dry electrode. The wet electrode is selected to use conductive paste or physiological saline to the stimulated person to increase the direct connectivity between the scalp and the electrode module 104, so as to ensure that the actual brain electrical signals can be acquired.
In an embodiment, referring to fig. 3, the current feedback module 105 includes: a current detection module 301 and a first analog-to-digital conversion module 302; the input end of the current detection module 301 is connected with the output end of the transcranial electric stimulation module 102, the output end of the current detection module 301 is connected with the input end of the first analog-to-digital conversion module 302, and the current detection module 301 is used for collecting the current value of the electric stimulation signal and sending a current analog signal to the first analog-to-digital conversion module 302; the output end of the first analog-to-digital conversion module 302 is connected to the input end of the central control module 101, and the first analog-to-digital conversion module 302 is configured to receive the current analog signal and send the current digital signal to the central control module 101.
Specifically, the current detection module 301 collects a 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-to-digital conversion module 302; the first analog-to-digital conversion module 302 receives the current analog signal, performs analog-to-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. The current digital signal is monitored in real time, so that the stimulation process can be safely controlled, and the safety of a stimulated person is better protected.
In a specific embodiment, the current detection module 301 includes a sampling resistor and a current acquisition module; one end of a sampling resistor is connected with the analog switch module 103, the other end of the sampling resistor is connected with the transcranial electric stimulation module 102, and the sampling resistor is used for acquiring current of an electric stimulation signal; the input end of the current acquisition module is connected with the sampling resistor, the output end of the current acquisition module is connected with the input end of the first analog-to-digital conversion module 302, and the current acquisition module is used for acquiring the current value of the sampling resistor and sending a current analog signal to the first analog-to-digital conversion module 302. Specifically, the sampling resistor is arranged between the analog switch module 103 and the transcranial electric stimulation module 102, the sampling resistor is a high-precision sampling resistor, can effectively reflect the current of the electric stimulation signal,
In a specific embodiment, referring to fig. 4, the electroencephalogram signal acquisition module 201 includes: an electroencephalogram acquisition module 401, an electroencephalogram signal conditioning module 402 and a second analog-to-digital conversion module 403; the input end of the electroencephalogram acquisition module 401 is connected with the output end of the analog switch module 103, the output end of the electroencephalogram acquisition module 401 is connected with the input end of the electroencephalogram conditioning module 402, and the electroencephalogram acquisition module 401 is used for acquiring electroencephalogram signals and sending the electroencephalogram signals to the electroencephalogram conditioning module 402; the output end of the electroencephalogram signal conditioning module 402 is connected with the input end of the second analog-to-digital conversion module 403, and the electroencephalogram signal conditioning module 402 is used for receiving the electroencephalogram signal and sending an electroencephalogram analog signal to the second analog-to-digital conversion module 403; the output end of the second analog-to-digital conversion module 403 is connected to the input end of the central control module 101, and the second analog-to-digital conversion module 403 is used for receiving the brain electrical analog signal and sending the brain electrical digital signal to the central control module 101.
Specifically, the electroencephalogram acquisition module 401 is configured to acquire an electroencephalogram signal through the electrode module 104, and send the electroencephalogram signal to the electroencephalogram signal conditioning module 402; the electroencephalogram signal conditioning module 402 is configured to receive an electroencephalogram signal, perform signal conditioning on the electroencephalogram signal to obtain an electroencephalogram analog signal, and send the electroencephalogram analog signal to the second analog-to-digital conversion module 403; the second analog-to-digital conversion module 403 is configured to receive the electroencephalogram analog signal, perform analog-to-digital conversion on the electroencephalogram analog signal to obtain an electroencephalogram digital signal that can be identified by the central control module 101, and send the electroencephalogram digital signal to the central control module 101. The electrode modules 104 may be configured into a plurality of groups according to actual requirements, and the electroencephalogram acquisition module 401 and the electrode modules 104 are used to acquire electroencephalogram signals of the stimulated person, so as to acquire multi-channel electroencephalogram signals of the stimulated person, wherein a schematic diagram of the second analog-digital conversion module 403 is shown in fig. 5.
In a specific embodiment, referring to fig. 6, transcranial electrical stimulation module 102 includes: a digital-to-analog conversion module 501 and an electrical stimulation signal processing module 502; the input end of the digital-to-analog conversion module 501 is connected with the output end of the central control module 101, the output end of the digital-to-analog conversion module 501 is connected with the input end of the electric stimulation signal processing module 502, and the digital-to-analog conversion module is used for receiving electric stimulation digital signals and sending electric stimulation analog signals to the electric stimulation signal processing module 502; the output end of the electric stimulation signal processing module 502 is connected with the input end of the analog switch, and the electric stimulation signal processing module 502 is used for receiving electric stimulation analog signals and sending electric stimulation signals.
Specifically, the digital-to-analog conversion module receives the electrical stimulation digital signal, performs digital-to-analog conversion on the electrical stimulation digital signal to obtain an electrical stimulation analog signal which can be identified by the electrical stimulation signal processing module 502, and sends the electrical stimulation analog signal to the electrical stimulation signal processing module 502; the electrical stimulation signal processing module 502 receives the electrical stimulation analog signal, performs signal amplification and signal filtering on the electrical stimulation analog signal to obtain an electrical stimulation signal, and sends the electrical 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 electric stimulation digital signals are converted into electric stimulation signals, and the stimulated electric stimulation is performed through the electrode module 104, so that accurate electric stimulation treatment is realized.
In a specific embodiment, the system further includes a wireless transmission module, where the wireless transmission module is connected to the central control module 101, and the wireless transmission module is configured to receive the current value and send the current value to a preset upper computer. Specifically, the wireless transmission module ESP8266 chip. And the current value is sent to a preset upper computer by using the wireless transmission module, so that the current value can be checked conveniently.
In a specific embodiment, the system further comprises a power module, wherein an output end of the power module is connected with 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 for supplying 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 may be rechargeable, or portable.
Specifically, referring to fig. 7, the system further includes a voltage conversion module, an input end of the voltage conversion module is connected to the power module, an output end of the voltage conversion module is connected to the electroencephalogram signal acquisition module 201, and the voltage conversion module is configured 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, wherein one end of the fourth capacitor C65, 3 pins and 1 pin of the voltage conversion chip U7 are connected with the output end of the power module, the other end of the fourth capacitor C65 is grounded and connected with 2 pins of the voltage conversion chip U7, 5 pins of the voltage conversion chip U7 are respectively connected with 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 with the other end of the second capacitor C63, the other end of the first inductor L3 is respectively connected with one end of the third capacitor C64 and the electroencephalogram signal acquisition module 201, the other end of the third capacitor C64 is grounded, 4 pins of the voltage conversion chip U7 are connected with one end of the fifth capacitor C66, and the other end of the fifth capacitor C66 is grounded.
In a specific embodiment, referring to fig. 8, the current collecting module includes a current collecting chip U8 and a sixth capacitor C49, wherein a2 pin of the current collecting chip U8 is grounded, a 3 pin of the current collecting chip U8 is connected to the sampling resistor, a 5 pin of the current collecting chip U8 is connected to one end of the power module and one end of the sixth capacitor C49 respectively, the other end of the sixth capacitor C49 is grounded, and the other end of the current collecting chip U8 is connected to the first analog-to-digital conversion module 302.
In a specific embodiment, referring to fig. 9, the electroencephalogram signal conditioning module 402 includes an electroencephalogram 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, wherein the 2 pin and the 3 pin of the electroencephalogram signal conditioning chip U8 are connected to the electroencephalogram signal collecting module 401, the 4 pin of the electroencephalogram signal conditioning chip U8 is respectively grounded and connected to one end of the seventh capacitor C21, the other end of the seventh capacitor C21 is grounded, the 5 pin of the electroencephalogram signal conditioning chip U8 is grounded, the 6 pin of the electroencephalogram signal conditioning chip U8 is connected to the second analog-to-digital conversion module 403, the 7 pin of the electroencephalogram signal conditioning chip U8 is connected to one end of the eighth capacitor C18, the other end of the eighth capacitor C18 is grounded, the 1 pin of the electroencephalogram signal conditioning chip U8 is respectively connected to one end of the first resistor R14 and one end of the third resistor R21, the other end of the first resistor R14 is connected to one end of the second resistor R15, the other end of the second resistor R15 and the other end of the third resistor R21 is connected to the pin 8 of the electroencephalogram signal conditioning chip U8.
In a specific embodiment, referring to fig. 10, the analog switch module 103 controls the levels of three control pins A0/A1/A2 to realize different channel connections, and controls the conduction between the S0-S7 and the D pin, so that only one pin can be communicated with the D interface at any time.
In a specific embodiment, a second embodiment of the present application provides an electroencephalogram acquisition and transcranial electrical stimulation apparatus comprising an electroencephalogram acquisition and transcranial electrical stimulation system as set forth in any one of the first embodiments of the present application. By using the device, the current value is monitored in real time, so that the stimulated person is prevented from being damaged due to long-time stimulation when the current value is overlarge, and the risk that the stimulated person is stimulated by larger current is reduced.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is defined by the appended claims.
Claims (10)
1. An electroencephalogram acquisition and transcranial electrical stimulation system, the system comprising: the device comprises a central control module, a transcranial electric stimulation module, an analog switch module, an electrode module and a current feedback module;
The output end of the central control module is connected with the input end of the transcranial electric stimulation module and the input end of the analog switch module, and the central control module is used for sending electric stimulation control signals to the analog switch module and sending electric stimulation digital signals to the transcranial electric stimulation module;
The output end of the transcranial electric stimulation module is connected with the input end of the analog switch module and the input end of the current feedback module, and the transcranial electric stimulation module is used for receiving the electric stimulation digital signal and sending an electric stimulation signal;
The output end of the analog switch module is connected with the electrode module, and the analog switch module is used for receiving the electric stimulation control signal so as to realize the conduction of the transcranial electric stimulation module and the electrode module;
The electrode module is used for receiving an electric stimulation signal so as to complete electric stimulation;
The output end of the current feedback module is connected with the central control module, and the current feedback module is used for collecting the current value of the electric stimulation signal sent by the transcranial electric stimulation module and sending a current digital signal to the central control module;
The central control module is also used for sending the current digital signal to a preset upper computer so as to realize the monitoring of the current value.
2. The electrical brain acquisition and transcranial stimulation system of claim 1, further comprising: the input end of the electroencephalogram signal acquisition module is connected with the output end of the analog switch module, and the output end of the electroencephalogram signal acquisition module is connected with the input end of the central control module;
The central control module is also used for sending an electroencephalogram acquisition signal to the analog switch module;
The input end of the analog switch module is also connected with the electrode module, and the analog switch module is also used for receiving the electroencephalogram acquisition signal so as to realize the conduction of the electroencephalogram acquisition module and the electrode module;
the electrode module is also used for collecting an electroencephalogram signal and sending the electroencephalogram signal to the electroencephalogram signal acquisition module;
the electroencephalogram signal acquisition module is used for receiving the electroencephalogram signal and sending an electroencephalogram digital signal to the central control module;
The central control module is also used for sending the electroencephalogram digital signal to a preset upper computer so as to monitor the electroencephalogram digital signal.
3. The electrical brain acquisition and transcranial stimulation system of claim 1, wherein the current feedback module comprises: the device comprises a current detection module and a first analog-to-digital conversion module;
The input end of the current detection module is connected with the output end of the transcranial electric stimulation module, the output end of the current detection module is connected with the input end of the first analog-to-digital conversion module, and the current detection module is used for collecting the current value of the electric stimulation signal and sending a current analog signal to the first analog-to-digital conversion module;
the output end of the first analog-to-digital conversion module is connected with the input end of the central control module, and the first analog-to-digital conversion module is used for receiving the current analog signal and sending a current digital signal to the central control module.
4. An electroencephalogram acquisition and transcranial electrical stimulation system according to claim 3, wherein: the current detection module comprises a sampling resistor and a current acquisition module;
One end of the sampling resistor is connected with the analog switch module, the other end of the sampling resistor is connected with the transcranial electric stimulation module, and the sampling resistor is used for acquiring the current of the electric stimulation signal;
the current acquisition module input end is connected with the sampling resistor, the current acquisition module output end is connected with the first analog-to-digital conversion module input end, and the current acquisition module is used for acquiring the current value of the sampling resistor and sending a current analog signal to the first analog-to-digital conversion module.
5. The electrical brain acquisition and transcranial stimulation system of claim 2, wherein the electrical brain signal acquisition module comprises: the device comprises an electroencephalogram acquisition module, an electroencephalogram signal conditioning module and a second analog-to-digital conversion module;
The input end of the electroencephalogram acquisition module is connected with the output end of the analog switch module, the output end of the electroencephalogram acquisition module is connected with the input end of the electroencephalogram conditioning module, and the electroencephalogram acquisition module is used for acquiring electroencephalogram signals and sending the electroencephalogram signals to the electroencephalogram conditioning module;
the output end of the electroencephalogram signal conditioning module is connected with the input end of the second analog-to-digital conversion module, and the electroencephalogram signal conditioning module is used for receiving the electroencephalogram signal and sending an electroencephalogram analog signal to the second analog-to-digital conversion module;
the output end of the second analog-to-digital conversion module is connected with the input end of the central control module, and the second analog-to-digital conversion module is used for receiving the brain electrical analog signals and sending brain electrical digital signals to the central control module.
6. The electrical brain acquisition and transcranial stimulation system of claim 1, wherein the transcranial electrical stimulation module comprises: the digital-to-analog conversion module and the electric stimulation signal processing module;
The digital-to-analog conversion module input end is connected with the central control module output end, the digital-to-analog conversion module output end is connected with the electric stimulation signal processing module input end, and the digital-to-analog conversion module is used for receiving the electric stimulation digital signal and sending an electric stimulation analog signal to the electric stimulation signal processing module;
The output end of the electric stimulation signal processing module is connected with the input end of the analog switch module, and the electric stimulation signal processing module is used for receiving the electric stimulation analog signal and sending the electric stimulation signal.
7. The electroencephalogram acquisition and transcranial electrical stimulation system of claim 1, wherein: the electrode module is a dual-purpose electrode, and the dual-purpose electrode comprises any one electrode of a wet electrode, a semi-dry electrode and a dry electrode.
8. The electroencephalogram acquisition and transcranial electrical stimulation system of claim 1, wherein: the system also comprises a wireless transmission module, wherein the wireless transmission module is connected with the central control module and is used for receiving the current value and sending the current value to a preset upper computer.
9. The electroencephalogram acquisition and transcranial electrical stimulation system of claim 2, wherein: the system also comprises a power supply module, wherein the output end of the power supply module is connected with the central control module, the transcranial electric stimulation module, the analog switch module, the electrode module, the current feedback module and the electroencephalogram signal acquisition module, and the power supply module is used for supplying power to the central control module, the transcranial electric stimulation module, the analog switch module, the electrode module, the current feedback module and the electroencephalogram signal.
10. An electroencephalogram acquisition and transcranial electric stimulation device is characterized in that: comprising an electroencephalogram acquisition and transcranial electrical stimulation system according to any one of claims 1-9.
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