CN111436930A - Noise-proof multi-point contact elastic electrode cap - Google Patents
Noise-proof multi-point contact elastic electrode cap Download PDFInfo
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- CN111436930A CN111436930A CN202010148453.4A CN202010148453A CN111436930A CN 111436930 A CN111436930 A CN 111436930A CN 202010148453 A CN202010148453 A CN 202010148453A CN 111436930 A CN111436930 A CN 111436930A
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- 210000004556 brain Anatomy 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims abstract description 8
- 239000004033 plastic Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 4
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 210000004761 scalp Anatomy 0.000 abstract description 19
- 238000012360 testing method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001629 suppression Effects 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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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
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- Engineering & Computer Science (AREA)
- Public Health (AREA)
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- Surgery (AREA)
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- General Health & Medical Sciences (AREA)
- Psychiatry (AREA)
- Psychology (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
An anti-noise multi-point contact elastic electrode cap comprises a cap body and a plurality of brain electrode contacts, wherein a plurality of shielding connecting shells are arranged on the cap body at equal intervals and used for protecting the brain electrode contacts and preventing noise; the brain electrode contacts are elastic contact electrodes, the elastic contact electrodes are fixedly connected with the electrode holder, the end parts of the elastic contact electrodes penetrate through the upper end face of the electrode holder, the tip parts of the elastic contact electrodes penetrate through the lower end face of the electrode holder, a plurality of brain electrode contact signal wires are connected with a first outgoing line after being welded, and the first outgoing line is used for transmitting detection signals of the brain electrode contacts in the protective screen connecting shell. The invention is provided with the shielding connecting shell, the electrode seat, the elastic contact electrode and the grounding mechanism, so that the dry electrode can be effectively contacted with the scalp, and the signal interference is reduced.
Description
Technical Field
The invention relates to the field of electroencephalogram acquisition, in particular to a noise-proof multi-point contact elastic electrode cap.
Background
The electrode cap is the indispensable equipment that joins in marriage of present non-invasive brain electricity collection, and current electrode cap mainly falls into two kinds: one type is an electrode cap using a wet electrode. The electrodes of this type of electrode cap do not directly contact the scalp, and during the test, the hair of the head is shaved and the scalp surface is coated with a paste-like conductive paste to achieve low-impedance contact between the electrodes and the scalp collection point. The wet electrode cap has a high signal-to-noise ratio during testing, but has certain defects, the preparation process of each test is complex, the test cost is high, a large amount of time is generally spent in the configuration stage of the whole test, and in addition, the conductive paste has seepage fluidity, so that signal drift and signal crosstalk between adjacent electrodes can be possibly caused, and the real reliability of test data is damaged; as the acquisition time becomes longer, the conductive paste may also dry out, degrading signal quality.
Another electrode cap that can be used for brain-computer interface experiments is an electrode cap that uses dry electrodes. The electrode cap has the greatest advantages that wet media such as conductive paste are not needed, the electrode cap is worn during experiments, so that the dry electrode can be in contact with the scalp to collect signals, but the conventional dry electrode cap has the problems of noise and signal interference, and is influenced by uneven scalp of a human body and impurities on hair and the scalp during experiments, and the experimental effect of the dry electrode cap is poorer than that of the wet electrode cap. For example, patent document with patent publication number CN108937924A entitled "electroencephalogram cap telescopic electroencephalogram acquisition dry electrode and system" discloses a dry electrode cap, which is provided with a shell, a spring and a dry electrode, when in use, a plurality of electrodes are synchronously stretched under the influence of the spring structure, and because the scalp structure cannot be predicted before the electrodes are arranged, the problem that part of the electrodes cannot contact the scalp when in use is caused, and then the problems of crosstalk, noise and signal drift occur. The dry electrode cap disclosed in patent publication No. CN102323857B entitled "brain-computer interface electrode cap based on elastic array" still has the above-mentioned problems, and the above-mentioned two dry electrode caps have poor noise suppression capability and poor experimental effect in use.
Disclosure of Invention
The invention provides an anti-noise multipoint contact elastic electrode cap which is provided with a shielding connecting shell, an electrode seat, an elastic contact electrode and a grounding mechanism, aims to solve the problem that the signal-to-noise ratio of data is low due to the influence of an experimental environment on a dry electrode cap, and can effectively contact the dry electrode with scalp and reduce signal interference.
The technical scheme of the invention is as follows:
an anti-noise multi-point contact elastic electrode cap comprises a cap body and a plurality of brain electrode contacts, wherein a plurality of shielding connecting shells are arranged on the cap body at equal intervals and used for protecting the brain electrode contacts, electrode seats are arranged in the shielding connecting shells and are of cylindrical structures made of insulating materials, a grounding mechanism is arranged between the shielding connecting shells and the cap body, and the grounding structure is used for shielding external interference signals;
the brain electrode contacts are elastic contact electrodes, the elastic contact electrodes are fixedly connected with the electrode holder, the end portions of the elastic contact electrodes penetrate through the upper end face of the electrode holder, the tip portions of the elastic contact electrodes penetrate through the lower end face of the electrode holder, signal wires of the brain electrode contacts are connected with first outgoing wires after being welded, and the first outgoing wires are used for transmitting detection signals of the brain electrode contacts in the protective screen connecting shell.
Further, the grounding mechanism comprises a gasket and a second outgoing line, the gasket is of a circular ring structure, the lower end face of the gasket is fixedly connected with the cap body, and a circular through hole is formed in the corresponding position of the inner ring face of the cap body and the gasket.
Further, the protective screen connects the shell to include upper portion and lower part, upper portion is cylindric structure, the lower part is the open ladder cylindricality in inside cavity both ends, the major diameter end and the electrode holder fixed connection of lower part, the minor diameter end of lower part pass the cap body and gasket in proper order, minor diameter end lateral surface and gasket inner ring face fixed connection.
Furthermore, a wire outlet hole is formed in the outer side of the small-diameter end of the lower portion and corresponds to the gasket, the first outgoing wire penetrates through the wire outlet hole to be connected with a connector, the second outgoing wire is welded with the gasket and then penetrates through the wire outlet hole to be connected with the connector, and the second outgoing wire is a grounding wire.
Further, the upper portion and the lower portion are detachably connected through threads, and the upper portion, the lower portion and the gasket are all made of metal materials.
Furthermore, the joint of the signal wires of the brain electrode contacts and the first outgoing wire after welding is coated with an insulating layer in a thermoplastic way, and the insulating layer is made of plastic materials.
Through the technical scheme, the invention has the beneficial effects that:
1. the brain electrode shielding device is provided with a cap body, wherein a plurality of shielding connecting shells are arranged on the cap body at equal intervals and used for protecting brain electrode contacts, electrode seats are arranged in the shielding connecting shells, the electrode seats are cylindrical structures made of insulating materials, a grounding mechanism is arranged between the shielding connecting shells and the cap body, and the grounding structure is used for shielding external interference signals; the brain electrode contacts are elastic contact electrodes, the elastic contact electrodes are fixedly connected with the electrode holder, the end portions of the elastic contact electrodes penetrate through the upper end face of the electrode holder, the tip portions of the elastic contact electrodes penetrate through the lower end face of the electrode holder, signal wires of the brain electrode contacts are connected with first outgoing wires after being welded, and the first outgoing wires are used for transmitting detection signals of the brain electrode contacts in the protective screen connecting shell. During testing, an experimenter wears the electrode cap, elastic contact electrodes in the shielding connecting shell are elastically buckled and pressed to be in contact with the scalp, the elastic contact electrodes on the same electrode base form a group, the elastic contact electrodes are respectively in elastic contact with the scalp, and the elastic contact electrodes are independent from one another, so that the tips of the elastic contact electrodes can deform to different degrees according to the shapes of all parts of the scalp when the elastic contact electrodes are in contact with the scalp, and a plurality of elastic contact electrode detection points are arranged in one shielding connecting shell, so that the accuracy and stability of detection signals can be ensured when part of the elastic contact electrodes are in contact with hair or scalp impurities.
2. The grounding mechanism is arranged between the shielding connection shell and the cap body, so that the interference of external electric signals can be avoided, and the problem that the signal-to-noise ratio of data is low due to the fact that the dry electrode cap is interfered by the outside is solved.
3. The electrode holder is the cylindrical structure that insulating material made, and a plurality of elastic contact electrodes are fixed mutually independent on the electrode holder, avoid the signal between the adjacent electrode to crosstalk.
Drawings
Fig. 1 is a structural view of a noise-proof multi-point contact elastic electrode cap according to the present invention.
Fig. 2 is one of the structures of the shielding connecting shell of the noise-proof multi-point contact elastic electrode cap of the present invention.
Fig. 3 is a second structure diagram of the shielding connecting shell of the noise-proof multi-point contact elastic electrode cap of the present invention.
Fig. 4 is a schematic view of an elastic contact electrode structure of a noise-proof multi-point contact elastic electrode cap according to the present invention.
Fig. 5 is a schematic structural view of a welding position between a plurality of elastic contact electrode signal lines and a first outgoing line of the noise-proof multi-point contact elastic electrode cap according to the present invention.
The reference numbers in the figures are: the device comprises a cap body 1, brain electrode contacts 2, an upper portion 3, a lower portion 4, an electrode seat 5, a first outgoing line 6, a gasket 7, a second outgoing line 8 and a connector 9.
Detailed Description
The invention is further described with reference to the following figures and detailed description:
as shown in fig. 1 to 5, an anti-noise multi-point contact elastic electrode cap comprises a cap body 1 and a plurality of brain electrode contacts 2, wherein the cap body 1 is equidistantly provided with a plurality of shielding connecting shells for protecting the brain electrode contacts 2, an electrode holder 5 is arranged in each shielding connecting shell, each electrode holder 5 is a cylindrical structure made of a plastic material, and a grounding mechanism is arranged between each shielding connecting shell and the cap body 1 and used for shielding external interference signals;
the brain electrode contacts 2 are elastic contact electrodes, the elastic contact electrodes are fixedly connected with the electrode base 5, the end parts of the elastic contact electrodes penetrate through the upper end face and the tip parts of the electrode base 5 and penetrate out of the lower end face of the electrode base 5, signal wires of the brain electrode contacts 2 are connected with first outgoing wires 6 after being welded, and the first outgoing wires 6 are used for transmitting detection signals of the brain electrode contacts 2 in the protective screen connecting shell.
In order to prevent the brain electrode contact from being interfered by external electric signals during working, the grounding mechanism comprises a gasket 7 and a second outgoing line 8, the gasket 7 is of a circular ring structure, the lower end face of the gasket 7 is fixedly connected with the cap body 1, and a circular through hole is formed in the cap body 1 and the corresponding position of the inner ring face of the gasket 7.
Connect shell inner structure for simplifying the protective screen and make things convenient for equipment fixing to overhaul, the protective screen connects the shell to include upper portion 3 and lower part 4, upper portion 3 is cylindric structure, lower part 4 is the open ladder column shape in inside cavity both ends, the major diameter end and the electrode holder 5 fixed connection of lower part 4, the path end of lower part 4 pass the cap body 1 and gasket 7 in proper order the path end lateral surface and gasket 7 inner ring face fixed connection.
In order to optimize the product structure, the outer side of the small-diameter end of the lower part 4 is provided with a wire outlet hole corresponding to the gasket 7, the first wire outlet 6 penetrates through the wire outlet hole to be connected with the connector 9, the second wire outlet 8 is welded with the gasket 7 and then penetrates through the wire outlet hole to be connected with the connector 9, and the second wire outlet 8 is a grounding wire.
In order to shield peripheral signal interference and enable the second outgoing line 8 to work, the upper portion 3 and the lower portion 4 are detachably connected through threads, and the upper portion 3, the lower portion 4 and the gasket 7 are made of metal materials.
In order to further avoid crosstalk of the brain electrode contacts 2, the joints of the signal wires of the brain electrode contacts 2 and the first outgoing wires 6 after welding are coated with insulating layers in a thermoplastic mode, and the insulating layers are made of plastic materials.
In the present embodiment, the internal structure of the elastic contact electrode is as shown in fig. 4, an elastic expansion mechanism with a ring-shaped spring-like structure is arranged between the top and the tip, in the present embodiment, the connector 9 is a connector with a model number of a79022-001 manufactured by the company omnitics, and the connector 9 is connected with a brain-computer interface. The shield shell in the cap body 1 of the present embodiment is arranged according to the international 10/20 division method.
When the electrode cap is in operation, an experimenter wears the electrode cap, the tip of the elastic contact electrode which is exposed on the lower end face of the electrode seat 5 is in contact with the scalp by wearing the cap body 1, at the moment, the elastic contact electrode is tightly clamped by the scalp and the cap body 1 under the influence of the downward pressure of the cap body 1, the outer part of the elastic contact electrode is fixedly connected with the electrode seat 5, the telescopic mechanism in the elastic contact electrode deforms and retracts in different degrees according to the shape of the scalp, so that the elastic contact electrodes are in full contact with the scalp, as shown in fig. 3, a plurality of elastic contact electrodes on the same electrode seat 5 are mutually independent and do not interfere with each other, crosstalk of adjacent signals is avoided, and the plurality of elastic contact electrodes transmit detection signals to the connector 9 through the first outgoing.
When external electric signal interference occurs, for example, current such as static electricity flows through the shielding connecting shell, because the electrode holder 5 is made of plastic materials, the resistance of the electrode holder is very large, even if the electrode holder 5 is in direct contact with the shielding connecting shell, the detection abnormity of the elastic contact electrode cannot be influenced, meanwhile, the welding positions of the first outgoing line 6 and the elastic contact electrode signal lines are provided with insulating layers, the external electric signal interference is prevented, because the shielding connecting shell and the gasket 7 are made of metal materials, the electric signal flows to the gasket 7 through the shielding connecting shell, the gasket 7 is welded with the second outgoing line 8, the electric signal is grounded through the second outgoing line 8, the current on the shielding connecting shell is consumed, and the external electric signal interference condition.
The above-described embodiments are merely exemplary embodiments of the present invention, and not intended to limit the scope of the invention, such that equivalent changes and modifications in the structure, characteristics, and principles of the invention are included in the scope of the invention.
Claims (6)
1. An anti-noise multipoint contact elastic electrode cap comprises a cap body (1) and a plurality of brain electrode contacts (2), and is characterized in that a plurality of shielding connecting shells are equidistantly arranged on the cap body (1), the shielding connecting shells are used for protecting the brain electrode contacts (2), electrode seats (5) are arranged in the shielding connecting shells, the electrode seats (5) are cylindrical structures made of insulating materials, a grounding mechanism is arranged between the shielding connecting shells and the cap body (1), and the grounding structure is used for shielding external interference signals;
it is a plurality of brain electrode contact (2) are the elastic contact electrode, elastic contact electrode and electrode holder (5) fixed connection, the tip of elastic contact electrode passes the up end of electrode holder (5), the lower terminal surface that electrode holder (5) were worn out to the point portion, and is a plurality of be connected with first play line (6) after the signal line welding of brain electrode contact (2), first play line (6) are used for transmitting the detection signal of a plurality of brain electrode contacts (2) in the protective screen connects the shell.
2. The noise-proof multipoint contact elastic electrode cap according to claim 1, characterized in that the grounding mechanism comprises a gasket (7) and a second outlet wire (8), the gasket (7) is of a circular ring-shaped structure, the lower end face of the gasket (7) is fixedly connected with the cap body (1), and a circular through hole is formed in the cap body (1) and the gasket (7) at a position corresponding to the inner annular surface.
3. The noise-proof multipoint contact elastic electrode cap according to claim 2, wherein the barrier connecting shell comprises an upper portion (3) and a lower portion (4), the upper portion (3) is of a cylindrical structure, the lower portion (4) is of a stepped cylinder shape with a hollow interior and two open ends, a large-diameter end of the lower portion (4) is fixedly connected with the electrode holder (5), and a small-diameter end of the lower portion (4) sequentially penetrates through the cap body (1) and the gasket (7), and an outer side surface of the small-diameter end is fixedly connected with an inner annular surface of the gasket (7).
4. The noise-proof multi-point contact elastic electrode cap as claimed in claim 3, wherein an outlet hole is formed on the outer side of the small diameter end of the lower portion (4) corresponding to the gasket (7), the first outlet (6) is connected with a connector (9) through the outlet hole, the second outlet (8) is connected with the connector (9) through the outlet hole after being welded with the gasket (7), and the second outlet (8) is a ground wire.
5. The noise-proof multi-point contact elastic electrode cap as claimed in claim 3, wherein the upper portion (3) and the lower portion (4) are detachably connected through threads, and the upper portion (3), the lower portion (4) and the gasket (7) are made of metal.
6. The noise-proof multi-point contact elastic electrode cap as claimed in claim 1, wherein the joints of the signal wires of the brain electrode contacts (2) and the first outgoing wires (6) after being welded are thermoplastic coated with an insulating layer, and the insulating layer is made of plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010148453.4A CN111436930A (en) | 2020-03-05 | 2020-03-05 | Noise-proof multi-point contact elastic electrode cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010148453.4A CN111436930A (en) | 2020-03-05 | 2020-03-05 | Noise-proof multi-point contact elastic electrode cap |
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| Publication Number | Publication Date |
|---|---|
| CN111436930A true CN111436930A (en) | 2020-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010148453.4A Pending CN111436930A (en) | 2020-03-05 | 2020-03-05 | Noise-proof multi-point contact elastic electrode cap |
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| CN (1) | CN111436930A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323857A (en) * | 2011-08-30 | 2012-01-18 | 中国人民解放军国防科学技术大学 | Flexible array-based brain-computer interface electrode cap |
| CN106073768A (en) * | 2016-05-31 | 2016-11-09 | 臧大维 | The non-invasive detection of human cortical brain's electroneurographic signal high sensitivity and analysis process system |
| CN106880354A (en) * | 2017-02-23 | 2017-06-23 | 中国传媒大学 | A kind of inflatable multi-electrode brain electricity cap |
| CN107049307A (en) * | 2017-05-02 | 2017-08-18 | 臧大维 | Full-automatic EEG signals read the helmet |
| CN109893129A (en) * | 2019-04-10 | 2019-06-18 | 北京航空航天大学 | A kind of dry electrode and wearable brain electric detection means adjusting depth using air bag |
-
2020
- 2020-03-05 CN CN202010148453.4A patent/CN111436930A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323857A (en) * | 2011-08-30 | 2012-01-18 | 中国人民解放军国防科学技术大学 | Flexible array-based brain-computer interface electrode cap |
| CN106073768A (en) * | 2016-05-31 | 2016-11-09 | 臧大维 | The non-invasive detection of human cortical brain's electroneurographic signal high sensitivity and analysis process system |
| CN106880354A (en) * | 2017-02-23 | 2017-06-23 | 中国传媒大学 | A kind of inflatable multi-electrode brain electricity cap |
| CN107049307A (en) * | 2017-05-02 | 2017-08-18 | 臧大维 | Full-automatic EEG signals read the helmet |
| CN109893129A (en) * | 2019-04-10 | 2019-06-18 | 北京航空航天大学 | A kind of dry electrode and wearable brain electric detection means adjusting depth using air bag |
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Application publication date: 20200724 |
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