Electroencephalogram signal acquisition cap based on synchronous transcranial electrical stimulation

Abstract

The utility model relates to an electroencephalogram signal acquisition cap based on synchronous transcranial electrical stimulation, which comprises a fixed side plate, a support base is connected onto the fixed side plate, a connecting bottom plate is clamped in the support base in a sliding manner, and the position of an external electrode device is adjusted by pulling the external electrode device. When the collecting cap is used, the end of the external electrode device abuts against the scalp but does not excessively press the scalp, then the locking nut is screwed, the locking base hoops the external electrode device again, and therefore the using convenience of the collecting cap is improved. Electrodes of the external electrode device are divided into an input end and an output end and can measure electroencephalogram signals and execute transcranial electrical stimulation synchronously, the electrical stimulation generator generates electrical stimulation signals with specific frequency and amplitude, and meanwhile the signal acquisition module can acquire and release the electroencephalogram signals in real time and transmit the electroencephalogram signals to the single-chip microcomputer for voltage acquisition. Therefore, the acquisition cap can synchronously perform electrical stimulation and electroencephalogram signal acquisition, and the accuracy of an acquisition result can be improved.

Description

Technical Field

[0001] The utility model relates to an electroencephalogram signal acquisition cap, in particular to an electroencephalogram signal acquisition cap based on synchronous transcranial electrical stimulation, belonging to the technical fields of electroencephalogram signal acquisition and cranial electrical stimulation. Background Technique

[0002] During the operation of the brain, signals are mainly transmitted in two ways, one is chemical signals and the other is electrical signals. And people will show different states at different brain wave frequencies. Based on the characteristics of brain waves, people invented a brain wave acquisition device. Through a clamp-type housing, an external electrode is abutted against the periphery of the brain to collect the user's brain waves, and the collected brain wave signals are analyzed, so as to study the brain of the object to be detected and diagnose diseases. The most crucial part in electroencephalogram acquisition technology is the electroencephalogram acquisition cap. The existing electroencephalogram acquisition cap is similar to a swimming cap, and the electrodes are all metal sheets embedded in corresponding positions, and the metal sheets are used to collect electroencephalogram signals.

[0003] However, the external electrodes on the existing electroencephalogram signal acquisition cap are not convenient to disassemble and adjust. Since everyone's head size is different, after wearing the acquisition cap, the position of the external electrode mostly needs to be adjusted. Therefore, the existing acquisition cap is inconvenient to use. Moreover, when collecting electroencephalogram signals currently, electrical stimulation needs to be carried out first and then collected through the electroencephalogram signal acquisition cap. Such a time difference makes the electroencephalogram signal unable to reflect its original appearance. In view of this, the present utility model is specially proposed. Content of the Utility Model

[0004] The purpose of the present utility model is to provide an electroencephalogram signal acquisition cap based on synchronous transcranial electrical stimulation in order to solve the above problems, which can conveniently and quickly adjust the position of the external electrode, making the acquisition cap more convenient to use, and the acquisition cap can perform electrical stimulation and signal acquisition synchronously, which is beneficial to improving the accuracy of the acquisition result.

[0005] The present utility model realizes the above purpose through the following technical solutions. An electroencephalogram signal acquisition cap based on synchronous transcranial electrical stimulation includes a fixed side plate, a support base is connected to the fixed side plate, a connecting bottom plate is slidably clamped inside the support base, a support strip is connected to the connecting bottom plate, locking bases are respectively installed on the side walls of the support strip, a threaded ring is installed on the side wall of the locking base, a locking nut is connected to the outer surface thread of the threaded ring, a pressing block is installed on one side wall of the locking nut, and an external electrode device is slidably clamped on the locking base.

[0006] Further, in order to guide the connecting base plate and improve the stability of the connecting base plate during movement, a guiding block is installed on one side wall of the connecting base plate, a guiding groove is formed on the supporting base, and the guiding block is movably clamped with the guiding groove.

[0007] Further, in order to adjust the size of the collection cap and improve the comfort of the wearer, a limiting plate is installed on one side wall of the guiding block, guiding columns are respectively installed on one side wall of the limiting plate, a clamping base plate is slidably clamped on the guiding columns, a clamping head is installed on one side wall of the clamping base plate, a limiting side plate is installed on one side wall of the supporting base, positioning holes are respectively formed on the limiting side plate, the clamping head is movably clamped with the positioning holes, and a supporting spring is arranged on the side wall of the guiding column.

[0008] Further, in order to hold the user's chin and thus fix the collection cap on the user's head, a chin fixing strap is installed on one side wall of the fixing side plate.

[0009] Further, in order to improve the stability of the support strip when fixed on the user's head, an auxiliary support strip is connected to the support strip, and every two adjacent support strips are connected by the auxiliary support strip.

[0010] Further, in order to apply electrodes, adjust the parameters and waveforms of the electrodes, a single-chip microcomputer is installed on the auxiliary support strip. The electrical stimulation generator generates electrical stimulation signals with specific frequencies and amplitudes and sends them to the input end of the external electrode device to achieve electrical stimulation. At the same time, the output end of the external electrode device can send signals to the signal acquisition module to achieve signal acquisition and amplification of brain electrical signals and transmit them to the single-chip microcomputer for voltage acquisition.

[0011] Further, in order to adjust the position of the support strip so that the support strip can be adjusted according to the user's head shape, an adjusting screw is inserted into the supporting base, and the supporting base is connected to the fixing side plate through the adjusting screw.

[0012] Further, in order to improve the stability of the locking base when clamping the external electrode device, anti-slip grooves are respectively formed on the inner wall of the locking base.

[0013] Technical effects and advantages of the present utility model: By pulling the external electrode device to adjust its position, the end of the external electrode device abuts against the scalp without overly compressing it. Then, by turning the locking nut, the locking base tightly clamps the external electrode device again, which is conducive to improving the usability of the acquisition cap. Moreover, the external electrode device generates electrical stimulation signals with specific frequencies and amplitudes through an electrical stimulation generator, and at the same time, the signal acquisition module can collect and amplify electroencephalogram signals in real time, having both the functions of synchronous transcranial electrical stimulation and electroencephalogram signal acquisition and transmitting the voltage acquisition to the single-chip microcomputer. Thus, the acquisition cap can perform electrical stimulation and electroencephalogram signal acquisition synchronously, which is conducive to improving the accuracy of the acquisition results. Description of the Drawings

[0014] Figure 1 Schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 Schematic diagram of the fixed side plate structure of the present utility model;

[0016] Figure 3 Schematic diagram of the support strip structure of the present utility model;

[0017] Figure 4 Schematic diagram of the enlarged structure at A of the present utility model;

[0018] Figure 5 Schematic diagram of the enlarged structure at B of the present utility model;

[0019] Figure 6 Schematic diagram of the enlarged structure at C of the present utility model.

[0020] In the figure: 1, fixed side plate; 2, support base; 3, connecting bottom plate; 4, support strip; 5, locking base; 6, threaded ring; 7, locking nut; 8, pressing block; 9, external electrode device; 10, anti-slip groove; 11, guide block; 12, limiting plate; 13, guide post; 14, clamping bottom plate; 15, clamping head; 16, limiting side plate; 17, positioning hole; 18, guide groove; 19, support spring; 20, chin fixing strap; 21, adjusting screw; 22, auxiliary support strip; 23, single-chip microcomputer. Detailed Implementation Manner

[0021] The following embodiments will further illustrate the present utility model in conjunction with the drawings.

[0022] Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0023] Please refer toFigures 1-6 As shown in the figure, an electroencephalogram signal acquisition cap based on synchronous transcranial electrical stimulation includes a fixed side plate 1. A support base 2 is connected to the fixed side plate 1. A connecting bottom plate 3 is slidably clamped inside the support base 2. A support strip 4 is connected to the connecting bottom plate 3. Locking bases 5 are respectively installed on the side walls of the support strip 4. A threaded ring 6 is installed on the side wall of the locking base 5. A locking nut 7 is connected to the outer surface thread of the threaded ring 6. A pressing block 8 is installed on one side wall of the locking nut 7. An external electrode device 9 is slidably clamped on the locking base 5. When adjusting the position of the external electrode device 9, loosen the locking nut 7 so that the pressing block 8 no longer presses against the outer wall of the locking base 5, so that the locking base 5 no longer tightly clamps the external electrode device 9. Then pull the external electrode device 9 and adjust it to a suitable position so that the end of the external electrode device 9 can stick to the scalp without pressing too tightly on the scalp. Then the locking nut 7 can be tightened to drive the pressing block 8 to press against the side wall of the locking base 5 again, so that the locking base 5 can tightly clamp the external electrode device 9 again. Therefore, the acquisition cap can conveniently and quickly adjust the position of the external electrode device 9, which is beneficial to improving the convenience of the acquisition cap.

[0024] A guide block 11 is installed on one side wall of the connecting bottom plate 3. A guide groove 18 is formed on the support base 2. The guide block 11 is movably clamped with the guide groove 18. A limiting plate 12 is installed on one side wall of the guide block 11. Guide columns 13 are respectively installed on one side wall of the limiting plate 12. A clamping bottom plate 14 is slidably clamped on the guide columns 13. A clamping head 15 is installed on one side wall of the clamping bottom plate 14. A limiting side plate 16 is installed on one side wall of the support base 2. Positioning holes 17 are respectively formed on the limiting side plate 16. The clamping head 15 is movably clamped with the positioning holes 17. A support spring 19 is arranged on the side wall of the guide column 13. When the head sizes of users are different, by pulling the clamping bottom plate 14, the clamping head 15 is disengaged from the positioning holes 17 on the limiting side plate 16, and then the connecting bottom plate 3 is slid inside the support base 2 to adjust the size of the acquisition cap so that the size of the acquisition cap exactly matches the head size of the user, which is beneficial to improving the comfort of the wearer. Then loosen the clamping bottom plate 14, and drive the clamping bottom plate 14 to move through the support spring 19 so that the clamping head 15 is re-clamped with the positioning holes 17 on the limiting side plate 16 to fix the connecting bottom plate 3.

[0025] A chin fixing strap 20 is installed on one side wall of the fixed side plate 1. One chin fixing strap 20 is installed on one side wall of each of the two fixed side plates 1. A nylon buckle is installed at one end of the chin fixing strap 20. The two chin fixing straps 20 can be connected through the nylon buckle, so that the chin fixing strap 20 can tighten the user's chin, thereby fixing the acquisition cap on the user's head.

[0026] An auxiliary support belt 22 is connected to the support strip 4, and every two adjacent support strips 4 are connected by the auxiliary support belt 22. The auxiliary support belt 22 is beneficial to improving the stability of the support strip 4 when it is fixed to the user's head.

[0027] A single-chip microcomputer 23 is installed on the auxiliary support belt 22. The electrical stimulation generator generates electrical stimulation signals with specific frequencies and amplitudes and sends them to the input end of the external electrode device 9 to achieve electrical stimulation. At the same time, the output end of the external electrode device 9 can send signals to the signal acquisition module to achieve signal acquisition and amplification of electroencephalogram signals, and transmit them to the single-chip microcomputer 23 for voltage acquisition. Thus, this acquisition cap can perform electrical stimulation and electroencephalogram signal acquisition synchronously, which is beneficial to improving the accuracy of the acquisition results and is widely used in the field of industrial control.

[0028] An adjustment screw 21 is inserted into the support base 2. The support base 2 is connected to the fixed side plate 1 through the adjustment screw 21. By loosening the adjustment screw 21, the support base 2 can be adjusted, so that the support strip 4 connected to the support base 2 can be adjusted according to the user's head shape. Anti-slip grooves 10 are respectively formed on the inner wall of the locking base 5. Through the anti-slip grooves 10, it is beneficial to improving the stability of the locking base 5 when it clamps the external electrode device 9.

[0029] When in use, when the external electrode device 9 needs to be adjusted, by loosening the locking nut 7, the pressing block 8 no longer presses against the outer wall of the locking base 5, so that the locking base 5 no longer clamps the external electrode device 9. Then, the external electrode device 9 can be pulled to adjust the position of the external electrode device 9 so that the end of the external electrode device 9 abuts against the scalp without pressing the scalp too tightly. Then, the locking nut 7 is screwed to make the pressing block 8 press against the side wall of the locking base 5 again, so that the locking base 5 clamps the external electrode device 9 again to fix the external electrode device 9. Therefore, the use of this acquisition cap is more convenient and fast. And the electrical stimulation generator generates electrical stimulation signals with specific frequencies and amplitudes. At the same time, the signal acquisition module can collect and amplify electroencephalogram signals in real time and transmit them to the single-chip microcomputer 23 for voltage acquisition. Thus, this acquisition cap can perform electrical stimulation and electroencephalogram signal acquisition synchronously, which is beneficial to improving the accuracy of the acquisition results.

[0030] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0031] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cap for collecting electroencephalogram (EEG) signals based on synchronous transcranial electrical stimulation, comprising a fixed side plate (1), characterized in that: The fixed side plate (1) is connected to a support base (2), the support base (2) is internally slidably connected to a connecting base plate (3), the upper part of the connecting base plate (3) is connected to a supporting strip (4), the side walls of the supporting strip (4) are respectively installed with locking bases (5), the side walls of the locking base (5) are installed with threaded rings (6), the outer surface of the threaded ring (6) is threadedly connected to a locking nut (7), a clamping block (8) is installed on one side wall of the locking nut (7), the locking base (5) is slidably connected to an external electrode device (9), and the external electrode device (9) is internally provided with an electric stimulation generator and a signal acquisition module.

2. The EEG signal acquisition cap based on synchronous transcranial electrical stimulation according to claim 1, characterized in that: Anti-slip grooves (10) are respectively provided on the inner walls of the locking base (5).

3. The EEG signal acquisition cap based on synchronous transcranial electrical stimulation according to claim 1, characterized in that: A guide block (11) is installed on one side wall of the connecting base plate (3), a guide groove (18) is provided on the supporting base (2), and the guide block (11) is movably engaged with the guide groove (18).

4. The EEG signal acquisition cap based on synchronous transcranial electrical stimulation according to claim 3, characterized in that: A limiting plate (12) is installed on one side wall of the guide block (11), and a guide column (13) is installed on one side wall of the limiting plate (12). A clamping base plate (14) is slidably clamped on the guide column (13), and a clamping joint (15) is installed on one side wall of the clamping base plate (14). A limiting side plate (16) is installed on one side wall of the support base (2), and positioning holes (17) are respectively provided on the limiting side plate (16). The clamping joint (15) is movably clamped with the positioning hole (17), and a supporting spring (19) is provided on the side wall of the guide column (13).

5. The EEG signal acquisition cap based on synchronous transcranial electrical stimulation according to claim 1, characterized in that: A chin fixing strap (20) is installed on one side wall of the fixed side plate (1).

6. The EEG signal acquisition cap based on synchronous transcranial electrical stimulation according to claim 1, characterized in that: An adjusting screw (21) is inserted into the support base (2), and the support base (2) is connected to the fixed side plate (1) via the adjusting screw (21).

7. The EEG signal acquisition cap based on synchronous transcranial electrical stimulation according to claim 1, characterized in that: An auxiliary support belt (22) is connected to the support strip (4), and every two adjacent support strips (4) are connected via the auxiliary support belt (22).

8. The EEG signal acquisition cap based on synchronous transcranial electrical stimulation according to claim 7, characterized in that: A single-chip microcomputer (23) is installed on the auxiliary support belt (22); the electrical stimulation generator generates an electrical stimulation signal of a specific frequency and amplitude and sends it to the input end of the external electrode device (9) to achieve electrical stimulation; at the same time, the output end of the external electrode device (9) can send the signal to the signal acquisition module to achieve signal acquisition and amplification of the electroencephalogram signal, and transmit it to the single-chip microcomputer (23) for voltage acquisition.

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