Electroencephalogram acquisition helmet and system

Abstract

The invention discloses an electroencephalogram acquisition helmet and system. An electrode assembly of the electroencephalogram acquisition helmet is mounted at an electrode assembly mounting position on a support frame assembly; the mounting structural member is used for rotationally mounting the electrode assembly at the electrode assembly mounting position; the first end of the connecting piece is connected with the knob; the electrode unit is circumferentially limited in the connecting piece and extends out of the second end of the connecting piece; the sleeve structural part is axially limited on the outer side of the connecting part; the rotating ring is arranged on the outer side of the sleeve structural part in a sleeving mode and rotationally installed on the installation structural part. A first protruding part is arranged on the outer side of the sleeve structural part. A spiral groove in sliding fit with the first protruding part is formed in the side wall of the rotating ring so that the rotating ring can drive the sleeve structural part to ascend and descend when rotating. The elastic piece is connected with the electrode unit and used for always providing acting force extending out of the second end of the connecting piece for the electrode unit. Fine adjustment of the crimping stroke of the electrode unit can be achieved in a non-threaded mode, shaking of the helmet is avoided when hair is pulled, and the wearing comfort of the helmet is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electroencephalogram (EEG) equipment, and in particular to an EEG acquisition helmet and system. Background Art

[0002] As an important EEG monitoring tool, EEG helmets are promoting the development of neuroscience, psychology and related technologies. Its application in medical treatment, cognitive research and brain-computer interface will continue to expand. With the continuous advancement of technology, EEG helmets will surely provide us with more important means to deeply understand brain functions and improve human health.

[0003] Although EEG collection helmets have many advantages, they still face a series of challenges in practical applications. For example, the current EEG collection helmets only use a simple spring to adjust the tightness of the crimping, which cannot guarantee the adaptability of the multiple electrodes of the EEG collection helmet to different head shapes and the crimping effect on the scalps of different head shapes. Therefore, on the basis of the spring adjusting the tightness of the crimping, there should also be a function to adjust the crimping stroke separately. Although the prior art also has a solution for adjusting the electrode crimping stroke in addition to the spring, it is a threaded rotation type. The use of this threaded rotation method will result in problems such as poor comfort, high processing precision, and unsightly appearance.

[0004] In addition, since the helmet is used in the hair area, when the user's hair is thick, the electrodes often have difficulty passing through the hair. At this time, the electrodes need to be rotated and pressed again to make the electrodes pass through the hair and press the scalp better. However, when the current helmet uses the electrodes to comb the hair, the entire helmet will swing and shake, affecting the wearing comfort.

[0005] Therefore, there is currently a lack of a non-threaded solution for adjusting the crimping stroke and a solution for retracting the hair. Summary of the invention

[0006] The present application discloses an EEG collection helmet and system, which can achieve fine-tuning of the crimping stroke of the electrode unit in a non-threaded manner, and the present application avoids shaking of the helmet when combing the hair, thereby improving the wearing comfort of the helmet.

[0007] In order to achieve the above objectives, this application provides the following technical solutions: In the first aspect, the present application provides an EEG collection helmet, including a support frame assembly and a plurality of electrode assemblies; The support frame assembly forms a receiving space for surrounding the head, and a plurality of electrode assembly installation positions are provided on the support frame assembly, and one electrode assembly is installed at one electrode assembly installation position; The electrode assembly comprises a mounting structure, an axial adjustment mechanism, a circumferential adjustment mechanism and an electrode unit; The mounting structure is used to rotatably mount the electrode assembly at the electrode assembly mounting position; The circumferential adjustment mechanism includes a knob and a connector; the first end of the connector is connected to the knob; the electrode unit is circumferentially limited inside the connector and protrudes out of the second end of the connector; The axial adjustment mechanism comprises a sleeve structure, a rotating ring and an elastic member; the sleeve structure is axially limited to the outside of the connecting member; the rotating ring is sleeved on the outside of the sleeve structure and rotatably mounted on the mounting structure; A first protrusion is arranged on the outer side of the sleeve structure; a spiral groove is arranged on the side wall of the rotating ring to slide with the first protrusion, so that the sleeve structure is driven to rise and fall when the rotating ring rotates; The elastic member is connected to the electrode unit and is used to always provide the electrode unit with a force to extend the second end of the connector.

[0008] The above-mentioned EEG acquisition helmet includes a support frame assembly and a plurality of electrode assemblies, and the support frame assembly and the plurality of electrode assemblies are combined to complete the monitoring of the user's EEG activity. Specifically, the support frame assembly forms a accommodating space for surrounding the head, and the support frame assembly is provided with a plurality of electrode assembly mounting positions, and one electrode assembly is installed in one electrode assembly mounting position. Setting a plurality of electrode assembly mounting positions and a plurality of electrode assemblies, and installing them according to the head test area, can ensure that the electrodes cover the main areas of the brain and collect accurate EEG signals.

[0009] The electrode assembly includes a mounting structure, an axial adjustment mechanism, a circumferential adjustment mechanism and an electrode unit. Among them, the mounting structure is used to rotatably install the electrode assembly in the electrode assembly mounting position. The circumferential adjustment mechanism includes a knob and a connector, the first end of the connector is connected to the knob, and the electrode unit is circumferentially limited inside the connector and protrudes out of the second end of the connector. Circumferential limitation means that the electrode unit can move axially relative to the connector, but cannot move circumferentially relative to the connector, that is, the electrode unit and the connector rotate circumferentially together. When the knob is turned, the connector rotates driven by the knob, thereby driving the electrode unit to rotate. When the user's hair is relatively thick, this method can realize the function of pulling the hair, so that the electrode can better pass through the hair and press against the scalp, without causing the helmet to swing and shake, thereby improving wearing comfort.

[0010] The axial adjustment mechanism includes a sleeve structure, a rotating ring and an elastic member. The sleeve structure is axially limited on the outside of the connector, and the rotating ring is sleeved on the outside of the sleeve structure and rotatably mounted on the mounting structure. Axial limit means that the sleeve structure can move relative to the connector in a circumferential direction, but cannot move relative to the connector in an axial direction. Since the connector is connected to the knob, the sleeve structure cannot move relative to the knob in an axial direction, that is, the sleeve structure and the knob move axially together. A first protrusion is provided on the outside of the sleeve structure, and a spiral groove that slides with the first protrusion is provided on the side wall of the rotating ring. When the rotating ring is rotated, the first protrusion moves in the spiral groove, causing the sleeve structure to move axially, and then the sleeve structure drives the knob, the knob drives the connector, and the connector drives the electrode unit to move axially. The elastic member is connected to the electrode unit and is used to always provide the electrode unit with a force to protrude from the second end of the connector.

[0011] During the wearing process of the helmet, the electrode unit needs to be roughly adjusted, finely adjusted, and hair-pulling steps before testing. Specifically, after the helmet is worn on the head, the relevant area of ​​the head will be squeezed with the electrode unit. During the squeezing process, the elastic member will be compressed, thereby driving the electrode unit to move. After the relevant parts are tightened, the coarse adjustment of the electrode unit test position is completed, thereby realizing the function of the elastic member to adjust the crimping stroke of the electrode unit. Then, in order to make each electrode unit further press the scalp, the first protrusion can be rotated by rotating the rotating ring so that the sleeve structure moves axially, and finally drives the electrode unit to move axially, thereby realizing the function of fine-tuning the crimping stroke of the electrode unit. Afterwards, in the case where the electrode unit contacts the hair area, the knob can be turned to finally drive the electrode unit to rotate circumferentially, thereby realizing the hair-pulling function of the electrode unit, and this method prevents the shaking of the helmet and improves the wearing comfort. In addition, the electrode assembly of the present application is rotatably installed at the electrode assembly installation position, and the angle swing of the electrode unit can be realized by rotating the electrode assembly before adjusting the crimping stroke of the electrode unit, so that the electrode unit fits the scalp more closely and improves the test accuracy.

[0012] In some embodiments, the axial adjustment mechanism further includes a first bracket and a connecting portion; The first bracket is sleeved inside the sleeve structure, and the first end of the first bracket is connected to the first end of the sleeve structure through the connecting portion; wherein the first end of the first bracket is an end of the first bracket close to the knob, and the first end of the sleeve structure is an end of the sleeve structure close to the knob; The first end of the connector passes through the connecting portion and is connected to the knob, and the end of the elastic member away from the electrode unit is sleeved inside the first bracket and connected to the first end of the first bracket, for providing a force for the sleeve structure to abut against the knob.

[0013] In some embodiments, the second end of the connector has a first stopper for preventing the electrode unit from falling out of the second end of the connector.

[0014] In some embodiments, a second protrusion is provided on the inner side of the knob, and a limiting groove engaged with the second protrusion is provided on the first end of the connecting member, so that the connecting member is driven to rotate when the knob is rotated.

[0015] In some embodiments, the connecting member has a first limiting portion on the inner side and the electrode unit has a second limiting portion on the outer side, and the first limiting portion and the second limiting portion cooperate to drive the electrode unit to rotate when the connecting member rotates.

[0016] In some embodiments, the mounting structure includes a first mounting portion and a second mounting portion; The second mounting portion is arranged inside the first mounting portion and the first end of the second mounting portion is connected to the first end of the first mounting portion; the rotating ring is arranged outside the second mounting portion and has an interference fit with the second mounting portion, and the second end of the second mounting portion has a second stop portion for preventing the rotating ring from falling off from the second end of the second mounting portion.

[0017] In some embodiments, the first mounting portion includes a support wall, the support wall is connected to the first end of the first mounting portion and extends in a direction close to the electrode unit; The support wall and the side wall of the second mounting portion are both provided with avoidance grooves, and the avoidance grooves extend along the axial direction of the second mounting portion so as to avoid the moving path of the first protrusion when the rotating ring rotates.

[0018] In some embodiments, the support frame assembly includes a support rib, which is arranged at the electrode assembly mounting position, and the support wall has a third protrusion on the side away from the second mounting portion, and the support wall is rotatably connected to the support rib through the third protrusion.

[0019] In some embodiments, the axial adjustment mechanism also includes a second bracket, which is arranged at the end of the electrode unit facing the knob, and the elastic member is connected to the second bracket at one end close to the electrode unit, for always providing the electrode unit with a force to extend out of the second end of the connector.

[0020] In some embodiments, the electrode unit includes a circuit board, and the electrode assembly further includes a socket and a plug; The socket is arranged at one end of the first bracket, and the plug is electrically connected to the socket; The plug includes a metal male connector, and the socket includes a metal female connector; one end of the metal female connector is electrically connected to the metal male connector, and the other end is electrically connected to the circuit board, and the other end of the metal male connector is used to be electrically connected to the electrode line.

[0021] In some embodiments, the support frame assembly includes a top area left support frame, a top area middle support frame, a top area right support frame, a forehead support frame, an occipital area support frame, a first connecting belt, a second connecting belt, and a third connecting belt; The top area left support frame and the top area right support frame are both connected to the top area middle support frame through the first connecting belt; the top area left support frame, the top area middle support frame, and the top area right support frame are all connected to the forehead support frame through the second connecting belt; the top area left support frame, the top area middle support frame, and the top area right support frame are all connected to the occipital area support frame through the third connecting belt.

[0022] In some embodiments, the support frame assembly also includes an adjustable strap, and the top area left support frame and the top area right support frame are both transmission connected to the forehead support frame through the adjustable strap, and the forehead support frame is transmission connected to the occipital area support frame through the adjustable strap.

[0023] In some embodiments, the support frame assembly also includes a chin elastic band, which is connected to the forehead support frame and is used to cooperate with the top area left support frame, the top area middle support frame, the top area right support frame, the forehead support frame and the occipital area support frame to fix the helmet to the head.

[0024] In a second aspect, the present application provides an EEG acquisition system, including an electrode line, a wiring board unit, a power supply unit, an amplifier unit, a visual evoked stimulation device, a terminal device, and an EEG acquisition helmet as described in the first aspect; One end of the electrode wire is arranged inside the plug of the EEG collection helmet and is electrically connected to the male head of the metal connector, and the other end is electrically connected to the wiring board unit; The visual induced stimulation device is electrically connected to the wiring board unit, and the wiring board unit is electrically connected to the amplifier unit, and is used to aggregate the label data of the visual induced stimulation device and the EEG data of the EEG collection helmet and transmit them to the amplifier unit; The amplifier unit is used to amplify the label data and the EEG data; The terminal device is electrically connected to the amplifier unit and is used to compare and analyze the tag data and EEG data after signal amplification; The power supply unit is electrically connected to the wiring hub unit and is used to supply power to the wiring hub unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the left-side structure of an EEG acquisition helmet provided in an embodiment of the present application; Figure 2 A schematic cross-sectional view of an electrode assembly provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of a rotating ring provided in an embodiment of the present application; Figure 4 A schematic structural diagram of a sleeve structure, a first bracket and a connecting portion provided in an embodiment of the present application; Figure 5 A bottom view structural diagram of a sleeve structure, a first bracket and a connecting portion provided in an embodiment of the present application; Figure 6 A schematic cross-sectional structure diagram of a sleeve structure, a first bracket and a connecting portion provided in an embodiment of the present application; Figure 7 A schematic cross-sectional view of another angle electrode assembly provided in an embodiment of the present application; Figure 8 A schematic diagram of the structure of a connector provided in an embodiment of the present application; Fig. 9 A schematic structural diagram of another angle connection member provided in an embodiment of the present application; Fig.10 A schematic structural diagram of another angle connector provided in an embodiment of the present application; Fig.11 A bottom-view structural schematic diagram of a connector provided in an embodiment of the present application; Fig.12 A schematic diagram of the front view structure of a connector provided in an embodiment of the present application; Fig.13 A schematic diagram of a top view of a connector provided in an embodiment of the present application; Fig.14 A partial structural schematic diagram of an electrode assembly provided in an embodiment of the present application; Fig.15 A schematic diagram of a partial explosion structure of an electrode assembly provided in an embodiment of the present application; Fig.16 A schematic diagram of the structure of a mounting structure provided in an embodiment of the present application; Fig.17 A schematic diagram of another structural member installed at an angle provided in an embodiment of the present application; Fig.18 A schematic diagram of the rear view structure of an EEG acquisition helmet provided in an embodiment of the present application; Fig.19A schematic diagram of a top view of an EEG acquisition helmet provided in an embodiment of the present application; Fig. 20 A schematic diagram of the right side structure of an EEG acquisition helmet provided in an embodiment of the present application; Fig.21 A partial structural schematic diagram of an electrode assembly provided in an embodiment of the present application; Fig. 22 A partial structural schematic diagram of another angle electrode assembly provided in an embodiment of the present application; Fig.23 A partial structural schematic diagram of another angle electrode assembly provided in an embodiment of the present application; Fig.24 A schematic diagram of the structure of an electrode assembly provided in an embodiment of the present application; Fig.25 A partial structural schematic diagram of an electrode assembly provided in an embodiment of the present application; Fig.26 A schematic diagram of the left-side structure of an EEG acquisition helmet provided in an embodiment of the present application; Icons: 001, support frame assembly; 002, electrode assembly; A, electrode assembly installation position; 1, installation structure; 11, first installation part; 111, support wall; 12, second installation part; 121, second stop part; 122, avoidance groove; 2, circumferential adjustment mechanism; 21, knob; 211, second protrusion; 22, connector; 221, first stop part; 222, limit groove; 223, first limit part; 23, second bracket; 3, axial adjustment mechanism; 31, sleeve structure; 311, first protrusion; 32, rotating ring; 321, spiral groove; 33, elastic member; 34, first bracket; 35, connecting part; 4, electrode unit; 411, second limit part; 41, circuit board; 42, electrode claw holder ; 43. Electrode claw; 44. Electrode claw fixing tube; 5. Support rib; 6. Third protrusion; 7. Socket; 71. Metal connector female head; 72. Socket body; 73. Socket cap; 8. Plug; 81. Metal connector male head; 01. Left support frame of top area; 02. Middle support frame of top area; 03. Right support frame of top area; 04. Forehead support frame; 05. Occipital support frame; 06. First connecting belt; 07. Second connecting belt; 08. Third connecting belt; 09. Adjustable strip; 9. Chin elastic band; 10. Adjustment knob; 100. Electrode wire; 200. Hub unit; 300. Power supply unit; 400. Amplifier unit; 500. Visual evoked stimulation device; 600. Terminal device; 700. EEG acquisition helmet. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of associated objects, indicating that three relationships can exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0028] First, as Figure 1-Figure 26 As shown, the embodiment of the present application provides an EEG collection helmet, including a support frame assembly 001 and a plurality of electrode assemblies 002; The support frame assembly 001 forms a receiving space for surrounding the head, and a plurality of electrode assembly installation positions A are provided on the support frame assembly 001, and one electrode assembly 002 is installed at one electrode assembly installation position A; The electrode assembly 002 includes a mounting structure 1, a circumferential adjustment mechanism 2, an axial adjustment mechanism 3 and an electrode unit 4; The mounting structure 1 is used to rotatably mount the electrode assembly 002 at the electrode assembly mounting position A; The circumferential adjustment mechanism 2 includes a knob 21 and a connector 22; a first end of the connector 22 is connected to the knob 21; the electrode unit 4 is circumferentially limited inside the connector 22 and protrudes out of the second end of the connector 22; The axial adjustment mechanism 3 includes a sleeve structure 31, a rotating ring 32 and an elastic member 33; the sleeve structure 31 is axially limited to the outside of the connecting member 22; the rotating ring 32 is sleeved on the outside of the sleeve structure 31 and rotatably mounted on the mounting structure 1; A first protrusion 311 is disposed on the outer side of the sleeve structure 31; a spiral groove 321 is disposed on the side wall of the rotating ring 32 to slide with the first protrusion 311, so that the sleeve structure 31 can be lifted and lowered when the rotating ring 32 rotates; The elastic member 33 is connected to the electrode unit 4 and is used to always provide the electrode unit 4 with a force to extend out of the second end of the connector 22 .

[0029] like Figure 1-Figure 3 As shown, the above-mentioned EEG collection helmet includes a support frame assembly 001 and a plurality of electrode assemblies 002, and the support frame assembly 001 and the plurality of electrode assemblies 002 are combined to complete the monitoring of the user's EEG activity. Specifically, the support frame assembly 001 forms a accommodating space for surrounding the head, and the support frame assembly 001 is provided with a plurality of electrode assembly mounting positions A, and one electrode assembly 002 is installed in one electrode assembly mounting position A. Providing a plurality of electrode assembly mounting positions A and a plurality of electrode assemblies 002, and installing them according to the head test area, can ensure that the electrodes cover the main areas of the brain and collect accurate EEG signals.

[0030] The electrode assembly 002 includes a mounting structure 1, a circumferential adjustment mechanism 2, an axial adjustment mechanism 3 and an electrode unit 4. Among them, the mounting structure 1 is used to rotate and install the electrode assembly 002 in the electrode assembly mounting position A (which can be a mounting hole). The circumferential adjustment mechanism 2 includes a knob 21 and a connector 22, the first end of the connector 22 is connected to the knob 21, and the electrode unit 4 is circumferentially limited inside the connector 22 and protrudes out of the second end of the connector 22. Circumferential limitation means that the electrode unit 4 can move axially relative to the connector 22, but cannot move circumferentially relative to the connector 22, that is, the electrode unit 4 and the connector 22 rotate circumferentially together. When the knob 21 is turned, the connector 22 rotates under the drive of the knob 21, and then drives the electrode unit 4 to rotate. When the user's hair is relatively thick, this method can realize the function of pulling the hair, so that the electrode can better pass through the hair and press against the scalp, without causing the helmet to swing and shake, thereby improving wearing comfort.

[0031] The axial adjustment mechanism 3 includes a sleeve structure 31, a rotating ring 32 and an elastic member 33. The sleeve structure 31 is axially limited outside the connecting member 22, and the rotating ring 32 is sleeved outside the sleeve structure 31 and rotatably mounted on the mounting structure 1. Axial limitation means that the sleeve structure 31 can move relative to the connecting member 22 in the circumferential direction, but cannot move relative to the connecting member 22 in the axial direction. Since the connecting member 22 is connected to the knob 21, the sleeve structure 31 cannot move relative to the knob 21 in the axial direction, that is, the sleeve structure 31 and the knob 21 move axially together. The sleeve structure 31 is provided with a first protrusion 311 on the outside, and the side wall of the rotating ring 32 is provided with a spiral groove 321 that slidably cooperates with the first protrusion 311. When the rotating ring 32 is rotated, the first protrusion 311 moves in the spiral groove 321, causing the sleeve structure 31 to move axially, and then the sleeve structure 31 drives the knob 21, the knob 21 drives the connector 22, and the connector 22 drives the electrode unit 4 to move axially. The elastic member 33 is connected to the electrode unit 4, and is used to always provide the electrode unit 4 with a force to protrude the second end of the connector 22.

[0032] During the wearing process of the helmet, the electrode unit 4 needs to be roughly adjusted, finely adjusted, and hair-pulling, and then tested. Specifically, after the helmet is worn on the head, the relevant area of ​​the head will be squeezed with the electrode unit 4. During the squeezing process, the elastic member 33 will be compressed, thereby driving the electrode unit 4 to move. After the relevant components are tightened, the rough adjustment of the test position of the electrode unit 4 is completed, thereby realizing the function of the elastic member 33 adjusting the crimping stroke of the electrode unit 4. Then, in order to make each electrode unit 4 further press the scalp, the first protrusion 311 can be rotated by rotating the rotating ring 32 to drive the sleeve structure 31 to move axially, and finally drive the electrode unit 4 to move axially, thereby realizing the function of fine-tuning the crimping stroke of the electrode unit 4. Afterwards, in the case where the electrode unit 4 contacts the hair area, the knob 21 can be rotated back and forth and the knob 21 can be pressed down, thereby finally driving the electrode unit 4 to rotate circumferentially, so that the electrode unit 4 can better pass through the hair and press the scalp, thereby realizing the hair-pulling function of the electrode unit 4. That is, the electrode scalp impedance is checked on the host computer while wearing it, until the electrode scalp impedance drops within a reasonable range, the entire helmet is considered to be worn. The non-threaded fine-tuning electrode crimping stroke solution adopted in this application avoids the disadvantage that the helmet shakes when the thread is rotated, thereby improving wearing comfort. In addition, the non-threaded solution has a simple processing technology, more stable performance, smoother and more convenient adjustment effect, and the absence of threads makes the appearance more advantageous. In addition, the electrode assembly 002 of the embodiment of the present application is rotatably installed at the electrode assembly installation position A, and the angle of the electrode unit 4 can be swung by rotating the electrode assembly 002 before adjusting the crimping stroke of the electrode unit 4, so that the electrode unit 4 fits the scalp better and improves the test accuracy.

[0033] One possible implementation method is Figure 2 As shown, the elastic member 33 may be a spring. The first protrusion 311 may be a screw connected to the sleeve structure 31. Accordingly, the sleeve structure 31 should be provided with a threaded hole for installing the screw.

[0034] In some embodiments, the axial adjustment mechanism 3 further includes a first bracket 34 and a connecting portion 35; The first bracket 34 is sleeved inside the sleeve structure 31, and the first end of the first bracket 34 is connected to the first end of the sleeve structure 31 through the connecting portion 35; wherein the first end of the first bracket 34 is the end of the first bracket 34 close to the knob 21, and the first end of the sleeve structure 31 is the end of the sleeve structure 31 close to the knob 21; The first end of the connector 22 passes through the connecting portion 35 and is connected to the knob 21 . The end of the elastic member 33 away from the electrode unit 4 is sleeved inside the first bracket 34 and connected to the first end of the first bracket 34 , so as to provide a force for the sleeve structure 31 to abut against the knob 21 .

[0035] One possible implementation method is Figure 4-Figure 6 As shown, the first bracket 34 may be in a sleeve-like shape, and the outer wall of the first end of the first bracket 34 and the inner wall of the first end of the sleeve structure 31 are connected via a connecting portion 35. Figure 2 and Figure 7 As shown, the first end of the connector 22 passes through the connecting portion 35 and is connected to the knob 21, that is, it is sleeved between the first bracket 34 and the sleeve structure 31. The non-connected portion of the first bracket 34 and the sleeve structure 31 needs to give the first end of the connector 22 a certain rotation space, so that the knob 21 drives the connector 22 to rotate left and right, thereby realizing the action of the connector 22 driving the electrode unit 4 to perform the hair pulling action. The first end of the sleeve structure 31 of the embodiment of the present application contacts the knob 21, and the end of the elastic member 33 away from the electrode unit 4 is sleeved inside the first bracket 34 and connected to the first end of the first bracket 34. Since the elastic member 33 is in a compressed state, the sleeve structure 31 can always be in contact with the knob 21. When the rotating ring 32 is rotated, the first protrusion 311 can move upward, so that the sleeve structure 31 drives the knob 21, the knob 21 drives the connector 22, and the connector 22 drives the electrode unit 4 to move upward; the first protrusion 311 can also move downward, so that the connection part 35 of the sleeve structure 31 and the first bracket 34 presses down the connector 22, and the connector 22 drives the electrode unit 4 to squeeze the scalp, completing the fine adjustment of the crimping stroke of the electrode unit 4. It should be noted that the connector 22 and the electrode unit 4 need to have an interference fit to prevent the electrode unit 4 from moving up and down inside the connector 22, so as to avoid the electrode unit 4 and the scalp from being loosely pressed.

[0036] In some embodiments, the second end of the connector 22 has a first stopper 221 for preventing the electrode unit 4 from falling out of the second end of the connector 22 .

[0037] One possible implementation method is Figure 2 As shown, the second end of the connector 22 has a first stopper 221 , that is, the inner diameter of the second end of the connector 22 is smaller than the outer diameter of the electrode unit 4 , thereby preventing the electrode unit 4 from falling out of the second end of the connector 22 and enhancing the structural firmness.

[0038] In some embodiments, a second protrusion 211 is disposed on the inner side of the knob 21 , and a limiting groove 222 engaged with the second protrusion 211 is disposed on the first end of the connector 22 , so that the connector 22 is driven to rotate when the knob 21 rotates.

[0039] One possible implementation method is Figure 2 As shown, a second protrusion 211 is provided on the inner side of the knob 21, and the second protrusion 211 may be in a shape similar to a hook. Figure 8 , Fig. 9 , Fig.10 , Fig.12 As shown, the first end of the connecting member 22 is provided with a limiting groove 222 which is engaged with the second protrusion 211. The limiting groove 222 can be a rectangular hole. The second protrusion 211 cooperates with the limiting groove 222 to fix the knob 21 to the upper part of the connecting member 22, so that the knob 21 drives the connecting member 22, and the connecting member 22 drives the electrode unit 4 to rotate to realize the hair-pulling function.

[0040] In some embodiments, the inner side of the connecting member 22 has a first limiting portion 223 , and the outer side of the electrode unit 4 has a second limiting portion 411 . The first limiting portion 223 and the second limiting portion 411 cooperate to drive the electrode unit 4 to rotate when the connecting member 22 rotates.

[0041] One possible implementation method is Fig. 9 , Fig.10 , Fig.13 As shown, the first limiting portion 223 inside the connecting member 22 is a tangent plane, and the rest is in an arc shape. Fig.14 and Fig.15 As shown, the second limit portion 411 on the outer side of the electrode unit 4 is also a cutting plane, and the rest of the portion is also in an arc shape. The two cutting planes cooperate to enable the corresponding electrode unit 4 to rotate when the connecting member 22 rotates, thereby realizing the hair-pulling function, that is, when the electrode unit 4 is rotated and pressed, the shaking of the entire helmet is avoided, thereby improving the wearing comfort.

[0042] In some embodiments, the mounting structure 1 includes a first mounting portion 11 and a second mounting portion 12; The second mounting portion 12 is arranged inside the first mounting portion 11 and the first end of the second mounting portion 12 is connected to the first end of the first mounting portion 11; the rotating ring 32 is sleeved on the outside of the second mounting portion 12 and has an interference fit with the second mounting portion 12, and the second end of the second mounting portion 12 has a second stop portion 121 for preventing the rotating ring 32 from falling off from the second end of the second mounting portion 12.

[0043] One possible implementation method is Figure 2 , Fig.16 , Fig.17As shown, the first mounting portion 11 and the second mounting portion 12 can be an integrated structure, the second mounting portion 12 is arranged inside the first mounting portion 11 and the first end of the second mounting portion 12 is connected to the first end of the first mounting portion 11, the first mounting portion 11 is used to install the electrode assembly 002 on the electrode assembly mounting position A on the helmet, and the second mounting portion 12 is used to install various components of the electrode assembly 002. The rotating ring 32 is sleeved on the outside of the second mounting portion 12 and has an interference fit with the second mounting portion 12. After the rotating ring 32 is rotated to fine-tune the crimping stroke, the position of the electrode unit 4 can be kept fixed, and the electrode unit 4 will not move again due to external interference, thereby improving the measurement accuracy. The second end of the second mounting portion 12 has a second stopper 121, so as to prevent the rotating ring 32 from coming out of the second end of the second mounting portion 12 and enhance the structural firmness.

[0044] In some embodiments, the first mounting portion 11 includes a support wall 111, which is connected to the first end of the first mounting portion 11 and extends in a direction close to the electrode unit 4; The support wall 111 and the side wall of the second mounting portion 12 are both provided with an avoidance groove 122 , which extends along the axial direction of the second mounting portion 12 so as to avoid the moving path of the first protrusion 311 when the rotating ring 32 rotates.

[0045] One possible implementation method is Figure 2 , Fig.16 , Fig.17 As shown, the support wall 111 is perpendicular to the connecting plane of the first mounting portion 11 and the second mounting portion 12, and the support wall 111 and the second mounting portion 12 are located on the same side of the connecting plane. The support wall 111 and the second mounting portion 12 corresponding to the support wall 111 are both provided with an avoidance groove 122, which extends along the axial direction of the second mounting portion 12, is convenient for installing the first protrusion 311, and can avoid the moving path of the first protrusion 311 when the rotating ring 32 rotates. The avoidance groove 122 can also be an elliptical through hole.

[0046] In some embodiments, the support frame assembly 001 includes a support rib 5, which is arranged at the electrode assembly mounting position A. The support wall 111 has a third protrusion 6 on the side facing away from the second mounting portion 12, and the support wall 111 is rotatably connected to the support rib 5 through the third protrusion 6.

[0047] One possible implementation method is Figure 1 and Figure 2As shown, the third protrusion 6 can be a pin, and the support wall 111 is rotatably connected to the support rib 5 through the pin, thereby achieving the fixation of the electrode assembly 002 and the support frame assembly 001, and the electrode assembly 002 can also swing at an angle, so that the electrode unit 4 fits the scalp better, improving the adaptability of the helmet to different head shapes, and thereby improving the test accuracy.

[0048] In some embodiments, the axial adjustment mechanism 3 also includes a second bracket 23, which is arranged at the end of the electrode unit 4 facing the knob 21, and the elastic member 33 is connected to the second bracket 23 at one end close to the electrode unit 4, so as to always provide the electrode unit 4 with a force to protrude from the second end of the connecting member 22.

[0049] One possible implementation method is Figure 2 As shown, one end of the elastic member 33 is connected to the second bracket 23, and the other end is connected to the first bracket 34, so as to put the electrode unit 4 and the scalp in a compressed state and make the sleeve structure 31 abut against the knob 21. The first bracket 34 and the second bracket 23 in the embodiment of the present application both have a guiding function for the elastic member 33, so as to prevent the elastic member 33 from non-axial deformation, thereby making the position of the electrode unit 4 more stable.

[0050] In some embodiments, the electrode unit 4 includes a circuit board 41, and the electrode assembly 002 also includes a socket 7 and a plug 8; The socket 7 is disposed at one end of the first bracket 34, and the plug 8 is electrically connected to the socket 7; The plug 8 includes a metal connector male head 81, and the socket 7 includes a metal connector female head 71; one end of the metal connector female head 71 is electrically connected to the metal connector male head 81, and the other end is electrically connected to the circuit board 41, and the other end of the metal connector male head 81 is used to be electrically connected to the electrode line.

[0051] One possible implementation method is Figure 2As shown, the electrode unit 4 includes a circuit board 41, an electrode claw holder 42, an electrode claw 43 and an electrode claw fixing cylinder 44. Among them, the circuit board 41 and the electrode claw holder 42 are both located inside the electrode claw fixing cylinder 44, the circuit board 41 is arranged on the side of the second bracket 23 away from the knob 21, and the electrode claw holder 42 is arranged on the side of the circuit board 41 away from the second bracket 23, and the circuit board 41 and the electrode claw holder 42 can be welded together by soldering. One end of the electrode claw 43 is clamped to the side of the electrode claw holder 42 away from the second bracket 23, and the other end protrudes out of the electrode claw fixing cylinder 44 for crimping with the scalp. It should be noted that the circuit board 41 and the electrode claw holder 42 can be detachably connected or fixedly connected to the electrode claw fixing cylinder 44, or the circuit board 41 and the electrode claw holder 42 can be abutted against the bottom of the electrode claw fixing cylinder 44 by the elastic force of the elastic member 33, and the specific connection method is not limited. The end of the electrode claw 43 away from the electrode claw holder 42 is a circular structure, which can improve the comfort of the electrode claw 43 during the crimping process with the scalp.

[0052] The electrode assembly 002 further includes a socket 7 and a plug 8. The socket 7 includes a socket body 72 and a socket cap 73. The first bracket 34 has a mounting hole at one end near the knob 21. The socket cap 73 is fixedly mounted at the mounting hole. The socket body 72 is mounted on the socket cap 73 by threaded connection. Figure 21-25 As shown, there is a through hole on the end face of the knob 21, and the plug 8 is electrically connected to the socket body 72 through the through hole. The plug 8 includes a metal connector male head 81, and the socket body 72 includes a metal connector female head 71. The sizes of the metal connector male head 81 and the metal connector female head 71 match, so that when the plug 8 is inserted into the socket 7, the metal connector male head 81 and the metal connector female head 71 are electrically connected, which is convenient for plugging and unplugging. The metal connector female head 71 is plastic-sealed inside the socket body 72 and partially protrudes from the end of the socket body 72 away from the knob 21, and is used to be electrically connected to the circuit board 41. The metal connector male head 81 is plastic-sealed inside the plug 8, one end of which is electrically connected to the metal connector female head 71, and the other end is used to be electrically connected to the electrode wire. It can be understood that the electrode wire is partially arranged inside the plug 8. Compared with the related art in which the electrode wire and the electrode assembly are connected by welding, the embodiment of the present application is designed with a pluggable plug 8 and socket 7 structure, so that during the use of the helmet, it is convenient to replace the plug 8 and the electrode wire, with high replaceability, easy disassembly and troubleshooting, and high maintainability and maintainability.

[0053] It should be noted that the number of the metal connector female heads 71 ​​sealed with plastic inside the socket body 72 and the number of the metal connector male heads 81 sealed with plastic inside the plug 8 are not specifically limited, but the numbers of the two must be the same. For example, the number of the metal connector female heads 71 ​​and the metal connector male heads 81 is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, etc.

[0054] In some embodiments, the support frame assembly 001 includes a top area left support frame 01, a top area middle support frame 02, a top area right support frame 03, a forehead support frame 04, an occipital area support frame 05, a first connecting belt 06, a second connecting belt 07 and a third connecting belt 08; The left support frame 01 and the right support frame 03 of the top area are connected to the middle support frame 02 of the top area through the first connecting belt 06; the left support frame 01, the middle support frame 02 and the right support frame 03 of the top area are connected to the forehead support frame 04 through the second connecting belt 07; the left support frame 01, the middle support frame 02 and the right support frame 03 of the top area are connected to the occipital area support frame 05 through the third connecting belt 08.

[0055] One possible implementation method is Figure 1 , Figure 18-Figure 20 As shown, the top area left support frame 01, the top area middle support frame 02, and the top area right support frame 03 are used to cover the relevant test area on the top of the user's head, the forehead support frame 04 is used to cover the relevant test area on the forehead and both sides of the head of the user, and the occipital area support frame 05 is used to cover the relevant test area behind the user's head. In order to achieve the overall portability of the helmet, the embodiment of the present application connects the top area left support frame 01, the top area middle support frame 02, the top area right support frame 03, the forehead support frame 04, and the occipital area support frame 05 to each other through the first connecting belt 06, the second connecting belt 07, and the third connecting belt 08, which is conducive to enhancing the structural stability of the helmet. It should be noted that the top area left support frame 01, the top area middle support frame 02, the top area right support frame 03, the forehead support frame 04, the occipital area support frame 05, the first connecting belt 06, the second connecting belt 07, and the third connecting belt 08 can also be selected from elastic materials for integrated molding.

[0056] It is necessary to add that, if Figure 1 As shown, the top area left support frame 01, the top area middle support frame 02, the top area right support frame 03, the forehead support frame 04 and the occipital area support frame 05 can be arc-shaped structures determined according to the big data of human head shape dimensions, so as to adapt to the head shape. The first connecting belt 06 can use a wide connecting belt, the second connecting belt 07 can use a narrow connecting belt, and the third connecting belt 08 can use an M-shaped connecting belt.

[0057] In some embodiments, the support frame assembly 001 also includes an adjustable strip 09, and the top area left support frame 01 and the top area right support frame 03 are both transmission connected to the forehead support frame 04 through the adjustable strip 09, and the forehead support frame 04 is transmission connected to the occipital area support frame 05 through the adjustable strip 09.

[0058] One possible implementation method is Figure 1 , Figure 18-Figure 20As shown, the left support frame 01 of the top area and the right support frame 03 of the top area are both connected to the forehead support frame 04 through an adjustable strip 09, so that the size of the space in the axial direction of the helmet can be adjusted. The forehead support frame 04 is connected to the occipital support frame 05 through an adjustable strip 09, so that the size of the space in the circumferential direction of the helmet can be adjusted. The present application can make the helmet suitable for different users by setting the adjustable strip 09, and has a wide applicability.

[0059] It should be noted that the forehead support frame 04 is provided with an adjustment knob 10 at the position for covering the two sides of the head, and the middle part of the occipital support frame 05 is also provided with an adjustment knob 10. The adjustment knob 10 cooperates with the adjustable strap 09 to adjust the tightness of the helmet. When the cover of the adjustment knob 10 is in a pressed state, the cover is rotated clockwise, and the entire adjustment knob 10 is in a tightened state. When the cover of the adjustment knob 10 is in a lifted state, the entire adjustment knob 10 is in a relaxed state under the action and reaction of the tightening force. The working principle of the adjustment knob 10 is: when the cover of the adjustment knob 10 is pressed down, the gears on the inner wall of the cover and the gears inside the adjustment knob 10 are meshed to form a simple ratchet mechanism, which can only rotate in one direction and can only become tighter and tighter; when the cover of the adjustment knob 10 is lifted, the gears on the inner wall of the cover and the gears inside the adjustment knob 10 are disengaged, and are in a loosening state under the action and reaction of the tightening force. The internal gear of the adjusting knob 10 is connected to the adjustable strap 09 through a rope or a plastic belt or a steel wire, thereby adjusting the tightness of the helmet.

[0060] In some embodiments, Figure 1 As shown, the support frame assembly 001 also includes a chin elastic band 9, which is connected to the forehead support frame 04 and is used to cooperate with the top area left support frame 01, the top area middle support frame 02, the top area right support frame 03, the forehead support frame 04 and the occipital area support frame 05 to fix the helmet on the head.

[0061] Second, as Fig.26 As shown, the embodiment of the present application provides an EEG acquisition system, including an electrode line 100, a wiring board unit 200, a power supply unit 300, an amplifier unit 400, a visual evoked stimulation device 500, a terminal device 600 and an EEG acquisition helmet 700 as in the first aspect; One end of the electrode wire 100 is arranged inside the plug of the EEG collection helmet 700 and is electrically connected to the male head of the metal connector, and the other end is electrically connected to the wiring board unit 200; The visual evoked stimulation device 500 is electrically connected to the wiring board unit 200, and the wiring board unit 200 is electrically connected to the amplifier unit 400, and is used to aggregate the tag data of the visual evoked stimulation device 500 and the EEG data of the EEG collection helmet 700 and transmit them to the amplifier unit 400; The amplifier unit 400 is used to amplify the label data and the EEG data; The terminal device 600 is electrically connected to the amplifier unit 400 and is used to compare and analyze the tag data and the EEG data after signal amplification; The power supply unit 300 is electrically connected to the hub unit 200 and is used to supply power to the hub unit 200 .

[0062] In the embodiment of the present application, the electrode unit of the EEG acquisition helmet adopts an active dry electrode, the power supply unit 300 of the EEG acquisition system is an external power supply, the supply voltage is ±8V, and the electrode line 100 is a 5-core line. The hub unit 200 has two functions, one is to aggregate the electrode lines 100 of each active dry electrode and transmit them to the rear-end amplifier unit 400, and the other is to supply power to each active dry electrode. Since the number of internal cables of the electrode line 100 of the active electrode is large, the hub unit 200 is set to aggregate and reasonably wire these electrode lines 100, and the appearance is more beautiful. Since the active dry electrode consumes a lot of power when it is suspended, the number of acquisition channels is large, and the power consumption is large, the power supply of the separate hub unit 200 comes from the amplifier unit 400 (the power supply of the amplifier unit comes from the data line of the terminal device 600), so the power is not enough to power multiple active dry electrodes. Therefore, the present application sets a solution of an external power supply unit 300, the external power supply unit 300 supplies power to the hub unit 200, and the hub unit 200 supplies power to each active dry electrode. The advantages of the external power supply unit 300 are small ripple and a large power supply range, which ensures the power supply of the multi-channel active dry electrodes and makes the system more stable.

[0063] In one possible implementation, the electrode unit uses 32 active dry electrodes. Each electrode unit has 5 wires on its circuit board that are connected to 5 female metal connectors inside the socket. At the same time, the matching plug has 5 male metal connectors, and the 5 male metal connectors are connected to 5 electrode wires. Each electrode wire coming out of the active dry electrode is connected to the hub unit 200, which transmits the data to the amplifier unit 400, and the amplifier unit 400 transmits the data to the terminal device 600 (which can be an EEG acquisition host computer software device). The power supply unit 300 supplies power to the hub unit 200, and the hub unit 200 supplies power to each active dry electrode.

[0064] The visual evoked stimulation device 500 transmits the label data to the amplifier unit 400 (which can be an EEG signal amplifier), and the active dry electrodes on the helmet transmit the EEG data to the amplifier unit 400. The amplifier unit 400 aggregates the two types of data and transmits them to the terminal device 600. In addition to displaying the waveform of the EEG data in real time, the terminal device 600 also has the function of online analysis of the EEG data, and can derive the accuracy of EEG signal classification in real time based on some algorithms.

[0065] It should be noted that there is no limit on the number of metal connector males and metal connector females of the electrode assembly, that is, there is no limit on the number of connecting wires between the metal connector females and the circuit board, and it can be 1, 2, 3, 4, 5, 6, etc.

[0066] In the embodiment of the present application, the communication uses data line wired transmission. If wireless transmission is used from the visual induced stimulation device 500 to the amplifier unit 400 and from the amplifier unit 400 to the terminal device 600, Wifi or Bluetooth communication or other wireless transmission methods can be used. In addition to using active dry electrodes, the electrode unit can also use wettable electrodes. Wettable electrodes usually use conductive paste to improve the quality of the signal, while active dry electrodes help to improve the portability and cleaning convenience of the helmet.

[0067] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A brain wave collection helmet, characterized in that: It includes a support frame assembly and a plurality of electrode assemblies; The support frame assembly forms a receiving space for surrounding the head, and a plurality of electrode assembly installation positions are provided on the support frame assembly, and one electrode assembly is installed at one electrode assembly installation position; The electrode assembly comprises a mounting structure, an axial adjustment mechanism, a circumferential adjustment mechanism and an electrode unit; The mounting structure is used to rotatably mount the electrode assembly at the electrode assembly mounting position; The circumferential adjustment mechanism includes a knob and a connecting piece; the first end of the connecting piece is connected to the knob; The electrode unit is circumferentially limited inside the connecting member and protrudes out of the second end of the connecting member; The axial adjustment mechanism comprises a sleeve structure, a rotating ring and an elastic member; the sleeve structure is axially limited to the outside of the connecting member; the rotating ring is sleeved on the outside of the sleeve structure and rotatably mounted on the mounting structure; A first protrusion is arranged on the outer side of the sleeve structure; a spiral groove is arranged on the side wall of the rotating ring to slide with the first protrusion, so that the sleeve structure is driven to rise and fall when the rotating ring rotates; The elastic member is connected to the electrode unit and is used to always provide the electrode unit with a force to extend the second end of the connector; The mounting structure comprises a first mounting portion and a second mounting portion; The second mounting portion is arranged inside the first mounting portion and the first end of the second mounting portion is connected to the first end of the first mounting portion; the rotating ring is arranged outside the second mounting portion and has an interference fit with the second mounting portion, and the second end of the second mounting portion has a second stop portion for preventing the rotating ring from falling off from the second end of the second mounting portion.

2. The EEG collection helmet according to claim 1, characterized in that: The axial adjustment mechanism also includes a first bracket and a connecting portion; The first bracket is sleeved inside the sleeve structure, and the first end of the first bracket is connected to the first end of the sleeve structure through the connecting portion; wherein the first end of the first bracket is an end of the first bracket close to the knob, and the first end of the sleeve structure is an end of the sleeve structure close to the knob; The first end of the connector passes through the connecting portion and is connected to the knob, and the end of the elastic member away from the electrode unit is sleeved inside the first bracket and connected to the first end of the first bracket, for providing a force for the sleeve structure to abut against the knob.

3. The EEG collection helmet according to claim 2, characterized in that: The second end of the connecting member has a first stopper for preventing the electrode unit from falling out of the second end of the connecting member.

4. The EEG collection helmet according to claim 3, characterized in that: A second protrusion is disposed on the inner side of the knob, and a limiting groove engaged with the second protrusion is disposed on the first end of the connecting member, so that the connecting member is driven to rotate when the knob is rotated.

5. The EEG collection helmet according to claim 4, characterized in that: The connecting member has a first limiting portion on the inner side, and the electrode unit has a second limiting portion on the outer side. The first limiting portion and the second limiting portion cooperate to drive the electrode unit to rotate when the connecting member rotates.

6. The EEG collection helmet according to claim 1, characterized in that: The first mounting portion includes a supporting wall, the supporting wall is connected to the first end of the first mounting portion and extends in a direction close to the electrode unit; The support wall and the side wall of the second mounting portion are both provided with avoidance grooves, and the avoidance grooves extend along the axial direction of the second mounting portion so as to avoid the moving path of the first protrusion when the rotating ring rotates.

7. The EEG collection helmet according to claim 6, characterized in that: The support frame assembly includes a support rib, which is arranged at the electrode assembly installation position. The support wall has a third protrusion on the side away from the second installation portion, and the support wall is rotatably connected to the support rib through the third protrusion.

8. The EEG collection helmet according to claim 5, characterized in that: The axial adjustment mechanism also includes a second bracket, which is arranged at the end of the electrode unit facing the knob. The end of the elastic member close to the electrode unit is connected to the second bracket for always providing the electrode unit with a force to extend out of the second end of the connector.

9. The EEG collection helmet according to claim 8, characterized in that: The electrode unit includes a circuit board, and the electrode assembly also includes a socket and a plug; The socket is arranged at one end of the first bracket, and the plug is electrically connected to the socket; The plug includes a metal connector male head, and the socket includes a metal connector female head; one end of the metal connector female head is electrically connected to the metal connector male head, and the other end is electrically connected to the circuit board; the other end of the metal connector male head is used to be electrically connected to the electrode line.

10. The EEG collection helmet according to claim 1, characterized in that: The support frame assembly includes a top area left support frame, a top area middle support frame, a top area right support frame, a forehead support frame, an occipital area support frame, a first connecting belt, a second connecting belt and a third connecting belt; The top area left support frame and the top area right support frame are both connected to the top area middle support frame through the first connecting belt; the top area left support frame, the top area middle support frame, and the top area right support frame are all connected to the forehead support frame through the second connecting belt; the top area left support frame, the top area middle support frame, and the top area right support frame are all connected to the occipital area support frame through the third connecting belt.

11. The EEG collection helmet according to claim 10, characterized in that: The support frame assembly also includes an adjustable strip, and the top area left support frame and the top area right support frame are both transmission-connected to the forehead support frame through the adjustable strip, and the forehead support frame is transmission-connected to the occipital area support frame through the adjustable strip.

12. The EEG collection helmet according to claim 11, characterized in that: The support frame assembly also includes a chin elastic band, which is connected to the forehead support frame and is used to cooperate with the top area left support frame, the top area middle support frame, the top area right support frame, the forehead support frame and the occipital area support frame to fix the helmet on the head.

13. An electroencephalogram acquisition system, characterized in that: It comprises electrode wires, a wiring board unit, a power supply unit, an amplifier unit, a visual evoked stimulation device, a terminal device and an EEG acquisition helmet as claimed in any one of claims 1 to 12; One end of the electrode wire is arranged inside the plug of the EEG collection helmet and is electrically connected to the male head of the metal connector, and the other end is electrically connected to the wiring board unit; The visual induced stimulation device is electrically connected to the wiring board unit, and the wiring board unit is electrically connected to the amplifier unit, and is used to aggregate the label data of the visual induced stimulation device and the EEG data of the EEG collection helmet and transmit them to the amplifier unit; The amplifier unit is used to amplify the label data and the EEG data; The terminal device is electrically connected to the amplifier unit and is used to compare and analyze the tag data and EEG data after signal amplification; The power supply unit is electrically connected to the wiring hub unit and is used to supply power to the wiring hub unit.

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