Electroencephalogram signal acquisition device

Abstract

The utility model relates to an electroencephalogram signal acquisition device, and relates to the field of medical instruments, the electroencephalogram signal acquisition device comprises a headband body, a plurality of air bags are detachably mounted in the headband body, a plurality of flexible dry electrodes are detachably mounted on the inner side of the headband body, and the plurality of flexible dry electrodes are in one-to-one correspondence with the plurality of air bags; the first button is used for inputting a starting signal; the second button is used for inputting an exhaust signal; the plurality of inflation valves are respectively mounted on the plurality of air bags; the exhaust valves are mounted on the air bags respectively; the plurality of pressure control units are respectively arranged between the air bag and the flexible dry electrode; the signal input end of the main control module is in signal connection with the signal output ends of the pressure control units, and the main control module is used for controlling the flexible dry electrodes to collect electroencephalogram signals when the air bags stop inflating. According to the method, the attaching tightness between the flexible dry electrode and the skin of a user can be guaranteed, and the accuracy of electroencephalogram signal collection is improved.

Description

Technical Field

[0001] This application relates to the field of medical devices, and in particular, to an electroencephalogram (EEG) signal acquisition device. Background Art

[0002] EEG signals are the synthesis of local neuronal electrical activities recorded from inside or outside the skull of the brain, containing rich physiological information, which can be used to evaluate the attention and relaxation degree of the wearer, and can also be used in the detection and treatment of brain diseases and the field of intelligent control.

[0003] In the prior art, there is a headband-type EEG signal acquisition device, which mainly includes a headband body. A plurality of flexible dry electrodes are fixedly installed on the headband body by sewing. The headband adjusts the wearing tightness through the connecting buckles at both ends of the headband body. A main control module, a wireless module, a storage module, etc. are also installed on the headband body. When the user fixes the headband on the head, the flexible dry electrodes collect EEG signals and transmit them to the main control module for processing, and then transmit them to the computer host through the wireless module for display. The computer host can analyze the EEG signals of the user.

[0004] However, in the process of using the headband-type EEG signal acquisition device, the existing headband-type EEG signal acquisition device cannot ensure the tightness of the fit between the flexible dry electrodes and the user's skin, which is likely to affect the measurement accuracy and there is room for improvement. Utility Model Content

[0005] In order to ensure the tightness of the fit between the flexible dry electrodes and the user's skin and improve the accuracy of EEG signal acquisition, this application provides an EEG signal acquisition device.

[0006] The EEG signal acquisition device provided by this application adopts the following technical solutions:

[0007] An EEG signal acquisition device includes a headband body. The two ends of the headband body are connected by connecting buckles. A plurality of air bags are detachably installed inside the headband body. A plurality of flexible dry electrodes are detachably installed on the inner side of the headband body, and the plurality of flexible dry electrodes respectively correspond to the plurality of air bags one by one; and:

[0008] A first button, installed on the headband body, for inputting a start signal;

[0009] A second button, installed on the headband body, for inputting an exhaust signal;

[0010] A plurality of inflation valves, respectively installed on the plurality of air bags, are signal-connected to the signal output end of the first button, and are used to receive the start signal and inflate the plurality of air bags;

[0011] A number of exhaust valves, respectively installed on a number of the air bags, are signal-connected to the signal output end of the second button, and are used to receive the exhaust signal and discharge the gas in the air bag;

[0012] A number of pressure control units are respectively installed between the air bag and the flexible dry electrode, the signal input end is signal-connected to the first button, and the signal output ends are respectively signal-connected to a number of the inflation valves, and are used to control the corresponding inflation valve to stop inflating when the pressure between the air bag and the flexible dry electrode reaches a set value;

[0013] The main control module, the signal input end is signal-connected to the signal output ends of a number of the pressure control units, and is used to control a number of the flexible dry electrodes to collect electroencephalogram signals when a number of the air bags all stop inflating.

[0014] By adopting the above technical solution, during the actual detection process, when the user wears the headband on the head, the start signal can be input through the first button on the headband body, and then the inflation valve starts to inflate the air bag, and the air bag bulges, so that the flexible dry electrode on the other side of the headband body moves towards the direction close to the user's skin; when the pressure between the flexible air bag and the flexible dry electrode reaches the set pressure value, due to the interaction of forces, it can be determined that the contact pressure between the flexible electrode and the user's skin reaches the set pressure. At this time, the pressure control unit controls the air bag to stop inflating, and the technical effect of automatically controlling the tightness between the flexible dry electrode and the user's skin can be achieved; when the flexible dry electrodes are all closely attached to the user's skin, the main control module controls the flexible dry electrodes to collect the electroencephalogram signals of the human body, and the technical effect of automatically triggering the collection of electroencephalogram signals can be achieved. Since the flexible dry electrodes are all closely attached to the human skin, the accuracy of electroencephalogram signal collection can be improved.

[0015] Preferably, a number of elastic shells are fixedly installed on the headband body, and installation cavities are respectively formed between the number of elastic shells and the headband body, and a number of the air bags are respectively installed in the number of installation cavities;

[0016] An air inlet pipe and an air outlet pipe are respectively communicated with the air bag, the inflation valve is installed on the air inlet pipe, and the exhaust valve is installed on the air outlet pipe;

[0017] Through holes for the air inlet pipe and the air outlet pipe to extend out are respectively opened at the tops of the elastic shells;

[0018] Zippers are respectively installed on the elastic shells.

[0019] By adopting the above technical solution, the elastic shell can be opened through the zipper, which is convenient for the user to take out the air bag from the elastic shell, and is convenient for replacing the air bag when the air bag is damaged.

[0020] Preferably, a number of silicone pads are fixedly installed on the inner side of the headband body. Connection grooves are formed on the side walls of the silicone pads, and female magic tapes are fixedly installed in the connection grooves. A male magic tape is fixedly installed on the back of the flexible dry electrode, and the male magic tape is embedded in the connection groove.

[0021] By adopting the above technical solution, the setting of the male magic tape and the female magic tape can achieve the technical effect of detachable connection between the flexible dry electrode and the headband body, facilitating the user to replace the flexible dry electrode when it is damaged. And because the silicone pad itself is soft in texture, it can improve the comfort of the user wearing the headband and facilitate the cleaning of the headband body at the same time.

[0022] Preferably, the pressure control unit includes:

[0023] A thin-film pressure sensor, located in the installation cavity, is fixedly installed on the side of the headband body close to the airbag, and is used to detect the contact pressure between the airbag and the headband body and output a contact pressure signal;

[0024] A comparator chip, the signal input end of which is signal-connected to the signal output end of the thin-film pressure sensor, is used to receive the contact pressure signal and output a high-level signal when the contact pressure reaches the set pressure value;

[0025] The signal input end of the inflating valve is signal-connected to the signal output end of the comparator chip, and the inflating valve receives the high-level signal and stops inflating the airbag.

[0026] By adopting the above technical solution, during the inflation process of the airbag, the thin-film pressure sensor can detect the contact pressure between the airbag and the headband body in real time, achieving the technical effect of detecting the tightness of the fit between the flexible dry electrode and the user's skin; used in conjunction with the comparator chip, it can control the airbag to stop inflating when the contact pressure reaches the set value, achieving the technical effect of automatically controlling the fitting pressure.

[0027] Preferably, the main control module includes a single-chip microcomputer, and the signal input end of the single-chip microcomputer is signal-connected to the signal input ends of a number of the comparator chips.

[0028] By adopting the above technical solution, when the signals output by the comparator chips are all high-level signals, the single-chip microcomputer can determine that the flexible dry electrodes are all in close contact with the human skin and automatically control the four flexible dry electrodes to collect the human brain electrical signals, achieving the technical effect of automatically triggering detection.

[0029] In summary, the electroencephalogram signal acquisition device of the present application has at least one of the following beneficial technical effects:

[0030] 1. During the actual detection process, after the user wears the headband on the head, a start signal can be input through the first button on the headband body. Subsequently, the inflation valve starts to inflate the airbag, and the inflated airbag causes the flexible dry electrode on the other side of the headband body to move towards the direction close to the user's skin; when the pressure between the flexible airbag and the flexible dry electrode reaches the set pressure value, due to the mutual action of forces, it can be determined that the contact pressure between the flexible electrode and the user's skin reaches the set pressure. At this time, the pressure control unit controls the airbag to stop inflating, and the technical effect of automatically controlling the tightness between the flexible dry electrode and the user's skin can be achieved; after the flexible dry electrodes are all closely attached to the user's skin, the main control module controls the flexible dry electrodes to collect the electroencephalogram (EEG) signals of the human body, and the technical effect of automatically triggering the collection of EEG signals can be achieved. Since the flexible dry electrodes are all closely attached to the human skin, the accuracy of EEG signal collection can be improved;

[0031] 2. The setting of the sub - magic tape and the mother - magic tape can achieve the technical effect of detachable connection between the flexible dry electrode and the headband body, which is convenient for the user to replace the flexible dry electrode when it is damaged; Description of the Drawings

[0032] Figure 1 is a schematic diagram showing the overall structure of the device in the embodiment of the present application.

[0033] Figure 2 is a schematic diagram showing the internal structure of the elastic housing in the embodiment of the present application.

[0034] Figure 3 is a schematic diagram showing the internal signal transmission of the device in the embodiment of the present application.

[0035] Description of the Reference Numerals: 1. Headband body; 11. First button; 12. Second button; 13. Elastic housing; 131. Through - hole; 14. Installation cavity; 15. Silicone pad; 16. Mother - magic tape; 2. Airbag; 21. Inflation valve; 22. Exhaust valve; 23. Intake pipeline; 24. Exhaust pipeline; 3. Flexible dry electrode; 31. Sub - magic tape; 4. Thin - film pressure sensor. Detailed Embodiment

[0036] The following is a further detailed description of the present application in combination with the attached Figures 1 - 3 drawings.

[0037] Embodiment

[0038] The embodiment of the present application discloses an electroencephalogram (EEG) signal collection device. Refer to Figures 1 - 3, including a headband body 1. Both ends of the headband body 1 are connected by connection buckles. A number of airbags 2 are detachably installed inside the headband body 1, and a number of flexible dry electrodes 3 are detachably installed on the inner side of the headband body 1, and the number of flexible dry electrodes 3 respectively correspond to the number of airbags 2 one by one.

[0039] And: a first button 11, installed on the headband body 1, for inputting a start signal; a second button 12, installed on the headband body 1, for inputting an exhaust signal; a number of inflation valves 21, respectively installed on the number of airbags 2, and signal-connected to the signal output end of the first button 11, for receiving the start signal and inflating the number of airbags 2; a number of exhaust valves 22, respectively installed on the number of airbags 2, and signal-connected to the signal output end of the second button 12, for receiving the exhaust signal and discharging the gas in the airbags 2; a number of pressure control units, respectively installed between the airbags 2 and the flexible dry electrodes 3, with the signal input end signal-connected to the first button 11, and the signal output ends respectively signal-connected to the number of inflation valves 21, for controlling the corresponding inflation valve 21 to stop inflating when the pressure between the airbags 2 and the flexible dry electrodes 3 reaches a set value; a main control module, with the signal input end signal-connected to the signal output ends of the number of pressure control units, for controlling the number of flexible dry electrodes 3 to collect electroencephalogram signals when the number of airbags 2 all stop inflating.

[0040] During the actual detection process, after the user wears the headband on the head, a start signal can be input through the first button 11 on the headband body 1, and then the inflation valve 21 starts to inflate the airbag 2. The inflation of the airbag 2 causes the flexible dry electrode 3 on the other side of the headband body 1 to move towards the direction close to the user's skin; when the pressure between the flexible airbag 2 and the flexible dry electrode 3 reaches the set pressure value, due to the interaction of forces, it can be determined that the contact pressure between the flexible electrode and the user's skin reaches the set pressure. At this time, the pressure control unit controls the airbag 2 to stop inflating, and the technical effect of automatically controlling the tightness between the flexible dry electrode 3 and the user's skin can be achieved; when the flexible dry electrodes 3 are all closely attached to the user's skin, the main control module controls the flexible dry electrodes 3 to collect the electroencephalogram signals of the human body, and the technical effect of automatically triggering the collection of electroencephalogram signals can be achieved. Since the flexible dry electrodes 3 are all closely attached to the human skin, the accuracy of electroencephalogram signal collection can be improved.

[0041] It should be noted that the headband body 1 in the embodiment of the present application is made of elastic fabric. Plastic connecting plates are fixedly installed at the ends of the number of airbags 2 on the headband body 1. Connecting ropes are connected to the plastic connecting plates, and connection buckles are installed at the ends of the two connecting ropes. The headband can be fixed through the connection buckles, and components such as the first button 11, the second button 12, the control circuit, and the storage battery are respectively installed on the two plastic connecting plates.

[0042] Refer to Figure 1 AndFigure 2 , a plurality of elastic shells 13 are fixedly installed on the headband body 1, installation cavities 14 are respectively formed between the plurality of elastic shells 13 and the headband body 1, and a plurality of air bags 2 are respectively installed in the plurality of installation cavities 14; air inlet pipes 23 and exhaust pipes 24 are respectively communicated with the air bags 2, an inflation valve 21 is installed on the air inlet pipe 23, and an exhaust valve 22 is installed on the exhaust pipe 24; through holes 131 for the air inlet pipe 23 and the exhaust pipe 24 to extend out are respectively opened at the tops of the elastic shells 13.

[0043] It should be noted that, in the embodiment of the present application, zippers are respectively installed on the outer side walls of the elastic shells 13 by sewing, and the zippers are arranged at positions close to the lower ends. The elastic shell 13 can be opened through the zipper, which is convenient for the user to take out the air bag 2 from the elastic shell 13, and is convenient for replacing the air bag 2 when the air bag 2 is damaged.

[0044] Refer to Figure 1 And Figure 2 , a plurality of silica gel pads 15 are fixedly installed on the inner side of the headband body 1, connecting grooves are respectively opened on the side walls of the plurality of silica gel pads 15, female magic tapes 16 are fixedly installed in the connecting grooves, male magic tapes 31 are fixedly installed on the back of the flexible dry electrode 3, and the male magic tape 31 is embedded in the connecting groove.

[0045] The setting of the male magic tape 31 and the female magic tape 16 can achieve the technical effect of detachable connection between the flexible dry electrode 3 and the headband body 1, which is convenient for the user to replace the flexible dry electrode 3 when the flexible dry electrode 3 is damaged. And because the silica gel pad 15 itself is soft in texture, it can improve the comfort of the user wearing the headband, and at the same time, it is convenient for cleaning the headband body 1.

[0046] Refer to Figure 2 And Figure 3 , the pressure control unit includes: a thin film pressure sensor 4, which is located in the installation cavity 14 and is fixedly installed on one side of the headband body 1 close to the air bag 2, and is used for detecting the contact pressure between the air bag 2 and the headband body 1 and outputting a contact pressure signal; a comparator chip, the signal input end of which is signal-connected to the signal output end of the thin film pressure sensor 4, and is used for receiving the contact pressure signal and outputting a high-level signal when the contact pressure reaches the set pressure value; the signal input end of the inflation valve 21 is signal-connected to the signal output end of the comparator chip, and the inflation valve 21 receives the high-level signal and stops inflating the air bag 2.

[0047] During the inflation process of the air bag 2, the thin film pressure sensor 4 can detect the contact pressure between the air bag 2 and the headband body 1 in real time, and can achieve the technical effect of detecting the tightness of the fit between the flexible dry electrode 3 and the user's skin; used in combination with the comparator chip, it can control the air bag 2 to stop inflating when the contact pressure reaches the set value, and can achieve the technical effect of automatically controlling the fitting pressure.

[0048] Reference Figure 3 In the embodiment of the present application, the main control module uses a single-chip microcomputer, and the signal input end of the single-chip microcomputer is signal-connected to the signal input ends of several comparator chips.

[0049] When the signals output by the comparator chips are all high-level signals, the single-chip microcomputer can determine that the flexible dry electrodes 3 are all closely attached to the human skin, and automatically control the four flexible dry electrodes 3 to collect the electroencephalogram signals of the human body, achieving the technical effect of automatic trigger detection.

[0050] It should be noted that in the embodiment of the present application, the number of flexible dry electrodes 3 on the electroencephalogram signal acquisition device is 4, which is used to collect the electroencephalogram signals of the user's forehead. In some other embodiments, according to the actual use needs, the number of flexible dry electrodes 3 can be increased or decreased, which is not limited here.

[0051] The implementation principle of an electroencephalogram signal acquisition device in an embodiment of the present application is as follows: During the actual detection process, after the user wears the headband on the head, a start signal can be input through the first button 11 on the headband body 1, and then the inflation valve 21 starts to inflate the airbag 2. The inflation of the airbag 2 causes the flexible dry electrode 3 on the other side of the headband body 1 to move towards the direction close to the user's skin; when the pressure between the flexible airbag 2 and the flexible dry electrode 3 reaches the set pressure value, due to the interaction of forces, it can be determined that the contact pressure between the flexible electrode and the user's skin reaches the set pressure. At this time, the pressure control unit controls the airbag 2 to stop inflating, achieving the technical effect of automatically controlling the tightness between the flexible dry electrode 3 and the user's skin; when the flexible dry electrodes 3 are all closely attached to the user's skin, the main control module controls the flexible dry electrodes 3 to collect the electroencephalogram signals of the human body, achieving the technical effect of automatically triggering the collection of electroencephalogram signals. Since the flexible dry electrodes 3 are all closely attached to the human skin, the accuracy of electroencephalogram signal collection can be improved.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An electroencephalogram signal acquisition device, characterized in that: The headband body (1) comprises a headband body (1), two ends of the headband body (1) are connected by a connecting buckle, a plurality of air bags (2) are detachably mounted inside the headband body (1), a plurality of flexible dry electrodes (3) are detachably mounted on the inner side of the headband body (1), and the plurality of flexible dry electrodes (3) correspond one to one with the plurality of air bags (2) respectively; as well as: A first button (11), mounted on the headband body (1), for inputting a start signal; A second button (12), mounted on the headband body (1), for inputting an exhaust signal; A plurality of inflation valves (21), respectively mounted on the plurality of air bags (2), signal-connected to the signal output end of the first button (11), and used for receiving the start signal and inflating the plurality of air bags (2); a plurality of exhaust valves (22), respectively mounted on the plurality of air bags (2), signal-connected to the signal output end of the second button (12), and used for receiving the exhaust signal and exhausting the gas in the air bags (2); A plurality of pressure control units are respectively installed between the airbag (2) and the flexible dry electrode (3), the signal input end of which is connected to the first button (11) by signal, and the signal output end of which is respectively connected to the plurality of inflation valves (21) by signal, and is used to control the corresponding inflation valves (21) to stop inflation when the pressure between the airbag (2) and the flexible dry electrode (3) reaches a set value; A main control module, whose signal input end is connected to the signal output ends of the plurality of pressure control units, is used to control the plurality of flexible dry electrodes (3) to collect brain electrical signals when the plurality of air bags (2) stop inflating.

2. The electroencephalogram signal acquisition device according to claim 1, characterized in that: A plurality of elastic shells (13) are fixedly mounted on the headband body (1), mounting cavities (14) are respectively formed between the plurality of elastic shells (13) and the headband body (1), and the plurality of air bags (2) are respectively mounted in the plurality of mounting cavities (14); The airbag (2) is respectively connected with an air intake pipe (23) and an air exhaust pipe (24); the inflation valve (21) is installed on the air intake pipe (23), and the exhaust valve (22) is installed on the exhaust pipe (24); The top of the elastic shell (13) is respectively provided with through holes (131) for the air intake pipe (23) and the air exhaust pipe (24) to extend out; Zippers are respectively installed on the elastic shells (13).

3. The electroencephalogram signal acquisition device according to claim 2, characterized in that: A plurality of silicone pads (15) are fixedly mounted on the inner side of the headband body (1), and a connection groove is provided on the side walls of the plurality of silicone pads (15), and a mother Velcro (16) is fixedly mounted in the connection groove. A child Velcro (31) is fixedly mounted on the back of the flexible dry electrode (3), and the child Velcro (31) is embedded in the connection groove.

4. The electroencephalogram signal acquisition device according to claim 3, characterized in that: The pressure control unit comprises: A thin film pressure sensor (4), located in the mounting cavity (14), fixedly mounted on a side of the headband body (1) close to the airbag (2), and used for detecting the contact pressure between the airbag (2) and the headband body (1) and outputting a contact pressure signal; A comparator chip, whose signal input end is signal-connected to the signal output end of the thin film pressure sensor (4), and is used to receive the contact pressure signal and output a high-level signal when the contact pressure reaches a set pressure value; The signal input end of the inflation valve (21) is signal-connected to the signal output end of the comparator chip, and the inflation valve (21) receives the high-level signal and stops inflating the airbag (2).

5. The electroencephalogram signal acquisition device according to claim 4, characterized in that: The main control module comprises a single chip microcomputer, and a signal input terminal of the single chip microcomputer is signal-connected to signal input terminals of a plurality of comparator chips.

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