CN111419228B - A hydrogel-based claw-like EEG electrode device - Google Patents
A hydrogel-based claw-like EEG electrode device Download PDFInfo
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- CN111419228B CN111419228B CN202010306589.3A CN202010306589A CN111419228B CN 111419228 B CN111419228 B CN 111419228B CN 202010306589 A CN202010306589 A CN 202010306589A CN 111419228 B CN111419228 B CN 111419228B
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- 239000000017 hydrogel Substances 0.000 title claims abstract description 62
- 210000000078 claw Anatomy 0.000 claims abstract description 32
- 210000004761 scalp Anatomy 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000007779 soft material Substances 0.000 claims abstract description 5
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 210000004556 brain Anatomy 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 7
- 241000282414 Homo sapiens Species 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004831 Hot glue Substances 0.000 description 2
- 206010019468 Hemiplegia Diseases 0.000 description 1
- 208000006011 Stroke Diseases 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007659 motor function Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 210000000578 peripheral nerve Anatomy 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/369—Electroencephalography [EEG]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
- A61B5/291—Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
- G06F3/015—Input arrangements based on nervous system activity detection, e.g. brain waves [EEG] detection, electromyograms [EMG] detection, electrodermal response detection
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0209—Special features of electrodes classified in A61B5/24, A61B5/25, A61B5/283, A61B5/291, A61B5/296, A61B5/053
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Abstract
The invention provides a claw-shaped electroencephalogram electrode device based on hydrogel, which comprises: an upper spiral push rod, hydrogel and a lower claw-shaped base; the lower claw-shaped base is used for containing the hydrogel and penetrating through hair; the upper screw push rod is used for extruding the hydrogel, so that the hydrogel overflows out of the cylindrical container, passes through the hollow claw and forms a hemispherical bulge structure at the tail end of the claw; the hydrogel is made of a conductive soft material, one end of the hydrogel is in contact with the scalp to be tested, and the other end of the hydrogel is connected with an external electronic component. The invention has the beneficial effects that: the electrode uses soft hydrogel as a conductive medium, and hair does not need to be cleaned after use; the problem that the hydrogel material is soft and cannot penetrate through hair is solved through the claw-shaped structure design; and the soft contact of the hydrogel with the scalp promotes user comfort.
Description
Technical Field
The invention relates to the technology in the field of non-invasive electroencephalogram signal acquisition, in particular to an electroencephalogram electrode.
Background
The brain-computer interface technology enables human beings to directly control external equipment through brain signals without the assistance of peripheral nerves and muscles, and brings good news to patients who suffer from stroke, hemiplegia and the like and lose motor functions. Among various brain signal acquisition methods, brain scalp brain waves (EEG) are acquired in a non-invasive manner, and are widely used in assisting a patient in controlling a wheelchair, spelling characters, and motor rehabilitation due to high time resolution, convenience in use, good mobility, and relatively low cost. In order to acquire a high-quality EEG signal, a conventional method is to inject a conductive paste between a metal electrode pad and a human scalp using a wet electrode, but this method is complicated to prepare, and requires a user to frequently wash the hair and the electrode, which causes inconvenience in practical use.
Through the search discovery of the prior art, Chinese patent publication No. CN109567800A, published as 2019.04.05, discloses an electroencephalogram dry electrode and electroencephalogram acquisition equipment, which are characterized by comprising a conductive connecting base, hydrogel and an ionic membrane; the hydrogel is arranged on the conductive connecting base, and the ionic membrane is tightly attached to the surface of the hydrogel; when the ionic membrane contacts human skin, allowing the skin surface and the hydrogel containing ions to perform ion exchange; and charge exchange is carried out between the conductive connecting base and the hydrogel so as to acquire electroencephalogram signals. The hydrogel is used as a conductive material, so that the contact impedance between the skin and the electrode is greatly reduced, and the quality of signal acquisition and the use comfort are improved.
Therefore, those skilled in the art are devoted to develop a new hydrogel electroencephalogram electrode which can penetrate through hair to contact scalp, can reduce the contact impedance of the electrode-scalp, and has the advantages of convenient use, no need of cleaning, low cost and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the claw-shaped electroencephalogram electrode based on the hydrogel, solves the problems that the preparation of a wet electrode is complex and the hair needs to be frequently cleaned, and solves the problem that the hair cannot be penetrated through by the claw-shaped structure.
A hydrogel-based claw-like electroencephalogram electrode device, comprising: hydrogel, lower claw base; the lower claw-shaped base is used for containing the hydrogel and penetrating through hair; the hydrogel is made of a conductive soft material, one end of the hydrogel is in contact with the scalp to be tested, and the other end of the hydrogel is connected with an external electronic component.
Further, the lower claw mount includes: a cylindrical container, a claw; the hydrogel is placed in the cylindrical container.
Further, the claw is hollow and is communicated with the cylindrical container.
Further, the claw is made of flexible materials.
Further, the number of the claws is more than 1, and the claws are arranged in a circular array mode.
Further, comprising: an upper spiral push rod; the upper screw push rod is used for extruding the hydrogel, so that the hydrogel overflows out of the cylindrical container, passes through the hollow claw and forms a hemispherical bulge structure at the tail end of the claw.
Further, the upper screw push rod includes: the conical connecting nut, the internal thread shell and the cylindrical push rod are arranged on the outer wall of the shell; the conical connecting nut is fixedly connected with the cylindrical push rod through threads, and the internal thread shell and the cylindrical push rod can rotate relatively;
further, the outer wall of the cylindrical push rod is provided with a concave key groove, the inner wall of the cylindrical container is provided with a convex key, and the key groove and the key are designed to be mutually matched for preventing the cylindrical push rod from rotating.
Further, the device comprises an electrode plate and a shielding connecting wire; one end of the hydrogel is connected with an external electronic component through the electrode plate and the shielding connecting line.
Furthermore, a conical groove is formed in the bottom end of the cylindrical push rod, and the electrode plate is made into a conical shape matched with the conical groove and is installed in the conical groove.
The beneficial effect of this application is: the electrode uses soft hydrogel as a conductive medium, and hair does not need to be cleaned after use; the problem that the hydrogel material is soft and cannot penetrate through hair is solved through the claw-shaped structure design; and the soft contact of the hydrogel with the scalp promotes user comfort.
Drawings
FIG. 1 is a structural cross-sectional view of a preferred embodiment of the present application;
FIG. 2 is a cross-sectional view of an assembled structure of a preferred embodiment of the present application;
FIG. 3 is a schematic representation of the use of a preferred embodiment of the present application;
the device comprises a shielding connecting wire 1, a conical connecting nut 2, an internal thread shell 3, a cylindrical push rod 4, a hot melt adhesive 5, a metal electrode plate 6, hydrogel 7, a cylindrical container with a lower claw-shaped base 8, a key groove structure 9, a claw with a lower claw-shaped base 10, a lower claw-shaped base 11, an upper spiral push rod 12 and an electrode fixing head band 13.
Detailed Description
The preferred embodiments of the present application will be described below with reference to the accompanying drawings for clarity and understanding of the technical contents thereof. The present application may be embodied in many different forms of embodiments and the scope of the present application is not limited to only the embodiments set forth herein.
The structural section of one embodiment of the invention as shown in fig. 1:
the method comprises the following steps: an upper spiral push rod 12, a metal electrode plate 6, hydrogel 7 and a lower claw-shaped base 11; the metal electrode plate 6 is fixed at the bottom end of the upper spiral push rod 12 through the hot melt adhesive 5; the hydrogel 7 is placed in the cylindrical container 8 of the lower claw-shaped base 11; the upper screw push rod 12 and the lower claw-shaped base 11 are connected by screw threads.
The upper spiral push rod 12 comprises three components, namely a conical connecting nut 2, an internal thread shell 3 and a cylindrical push rod 4, the conical connecting nut 2 is fixedly connected with the cylindrical push rod 4 through threads, and the internal thread shell 3 and the cylindrical push rod 4 can rotate relatively; the cylindrical push rod 4 has a through hole for passing through the shield connecting wire 1, a tapered groove at the bottom for placing the metal electrode sheet 6, and a concave groove with a width of 1.5mm on the outer wall.
The conical connecting nut 2 is used for fixing the claw-shaped electroencephalogram electrode on the electroencephalogram cap and limiting the axial movement of the internal thread shell 3.
The metal electrode plate 6 is in a cone shape, and the bottom of the cone is provided with a shielding connecting wire 1 which is used for connecting with an external electronic component; the metal electrode plate 6 protrudes out of the bottom end of the cylindrical push rod 4 by 2.5 mm.
The hydrogel 7 is a cylindrical soft material and has electrical conductivity.
The lower claw-shaped base 11 has an external thread, a cylindrical container, and a plurality of claws are provided at the bottom. The claws 10 are in the shape of circular truncated cones, have inner oblique through holes and are connected with the cylindrical container 8, and the claws are made of soft materials and are arranged in a circular array mode. The inner wall of the cylindrical container is provided with a convex key with the width of 1.4mm, and the convex key is used for being matched with a groove with the width of 1.5mm recessed on the outer wall of the cylindrical push rod 4, so that the cylindrical push rod 4 is prevented from being driven to rotate when a thread is screwed, and the hydrogel is prevented from rotating and distorting and is extruded and deformed unevenly.
Fig. 2 shows a sectional view of the assembled structure:
when the electrode is assembled, firstly, the hydrogel 7 is placed in the cylindrical container 8 of the lower claw-shaped base 11, then the assembled upper spiral push rod 12 is screwed to press the hydrogel 8 placed in the lower claw-shaped base 11, the hydrogel 8 is extruded from the inner inclined through hole of the claw 10, and a hemispherical bulge structure is formed at the tail end of the claw and is used for contacting with the scalp; the connection area can be increased by controlling the screwing force to adjust the protruding area of the hydrogel, and the connection condition of the hydrogel and the scalp is improved.
As shown in figure 3, which is a schematic use diagram of the electrode of the invention, the assembled claw-shaped electroencephalogram electrode is fixed on a simple electroencephalogram cap with holes through a conical connecting nut 2.
The foregoing detailed description of the preferred embodiments of the present application. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the concepts of the present application should be within the scope of protection defined by the claims.
Claims (8)
1. A claw-shaped electroencephalogram electrode device based on hydrogel is characterized by comprising: hydrogel, lower claw base; the lower claw-shaped base is used for containing the hydrogel and penetrating through hair; the hydrogel is made of a conductive soft material, one end of the hydrogel is in contact with the scalp to be detected, and the other end of the hydrogel is connected with an external electronic component; the lower claw-shaped base is in threaded connection with the upper spiral push rod; the upper screw pushing rod comprises: the conical connecting nut, the internal thread shell and the cylindrical push rod are arranged on the outer wall of the shell; the conical connecting nut is fixedly connected with the cylindrical push rod through threads, and the internal thread shell and the cylindrical push rod can rotate relatively; the lower claw-shaped base is provided with an external thread; screwing the upper spiral push rod to enable the internal thread shell and the cylindrical push rod to rotate relatively so as to extrude the hydrogel; the cylindrical push rod outer wall has a recessed keyway, the cylindrical container inner wall has a raised key, the keyway with the key is designed to cooperate for preventing the cylindrical push rod from rotating.
2. The hydrogel-based claw brain electrode assembly of claim 1, wherein said lower claw mount comprises: a cylindrical container, a claw; the hydrogel is placed in the cylindrical container.
3. The hydrogel-based claw brain electrode assembly of claim 2, wherein said claw is hollow and in communication with said cylindrical container.
4. The hydrogel-based claw electroencephalogram electrode apparatus of claim 2, wherein the material of the claw is a flexible material.
5. The hydrogel-based claw electroencephalogram electrode apparatus of claim 2, wherein the number of claws is greater than 1, arranged in a circular array.
6. The hydrogel-based claw electroencephalogram electrode apparatus of claim 3, wherein the upper screw pusher is used to squeeze the hydrogel, causing the hydrogel to overflow the cylindrical container, pass through the hollow claw, and form a hemispherical convex structure at the end of the claw.
7. The hydrogel-based claw electroencephalogram electrode device of claim 6, comprising an electrode pad, a shielding connection wire; one end of the hydrogel is connected with an external electronic component through the electrode plate and the shielding connecting line.
8. The hydrogel-based claw electroencephalogram electrode device of claim 7, wherein a conical groove is formed at the bottom end of the cylindrical push rod, and the electrode sheet is made into a conical shape matched with the conical groove and is installed in the conical groove.
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| CN202010306589.3A CN111419228B (en) | 2020-04-17 | 2020-04-17 | A hydrogel-based claw-like EEG electrode device |
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| CN202010306589.3A CN111419228B (en) | 2020-04-17 | 2020-04-17 | A hydrogel-based claw-like EEG electrode device |
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| CN111419228B true CN111419228B (en) | 2021-12-21 |
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| CN112089416B (en) * | 2020-09-14 | 2024-03-01 | 中国人民解放军陆军军医大学第一附属医院 | Ground wire electrode for electromyography |
| CN116509402A (en) * | 2023-05-07 | 2023-08-01 | 西北工业大学 | A flexible electronic wristband and its suction cup-type conductive hydrogel electrode integration method |
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| US5549615A (en) * | 1989-11-11 | 1996-08-27 | Vascomed Institut Fur Kathetertechnologie Gmbh | Method and apparatus for extracting pacemaker electrodes embedded in the heart |
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