CN109567800A - Brain electrical dry electrode and brain wave acquisition equipment - Google Patents
Brain electrical dry electrode and brain wave acquisition equipment Download PDFInfo
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- CN109567800A CN109567800A CN201811633948.5A CN201811633948A CN109567800A CN 109567800 A CN109567800 A CN 109567800A CN 201811633948 A CN201811633948 A CN 201811633948A CN 109567800 A CN109567800 A CN 109567800A
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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
- A61B5/296—Bioelectric electrodes therefor specially adapted for particular uses for electromyography [EMG]
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Abstract
本发明实施例涉及电子产品技术领域，公开了一种脑电干电极及脑电采集设备。本发明实施例中，脑电干电极包括：导电连接基座、水凝胶以及离子膜；所述水凝胶设置在所述导电连接基座上，且所述离子膜紧贴在所述水凝胶的表面；所述离子膜接触人体皮肤时，允许皮肤表面和内含离子的所述水凝胶进行离子交换，所述导电连接基座与所述水凝胶之间进行电荷交换以采集脑电信号。本发明实施例还提供了一种脑电采集设备。本发明实施例大大降低了皮肤与电极之间的接触阻抗，提高了信号采集的质量和使用舒适度。
This invention relates to the field of electronic product technology and discloses an electroencephalogram (EEG) dry electrode and an EEG acquisition device. In this embodiment, the EEG dry electrode includes: a conductive connection base, a hydrogel, and an ion exchange membrane; the hydrogel is disposed on the conductive connection base, and the ion exchange membrane is in close contact with the surface of the hydrogel; when the ion exchange membrane contacts human skin, ion exchange is allowed between the skin surface and the ion-containing hydrogel, and charge exchange occurs between the conductive connection base and the hydrogel to acquire EEG signals. This invention also provides an EEG acquisition device. This invention significantly reduces the contact impedance between the skin and the electrode, improving the quality of signal acquisition and user comfort.
Description
Technical field
The present embodiments relate to technical field of electronic products, in particular to a kind of brain electrical dry electrode and brain wave acquisition are set
It is standby.
Background technique
Brain electrical dry electrode for acquiring EEG signals is used as sensor to be gradually applied to brain wave acquisition equipment in recent years, by
In not needing progress Skin sensitization test and smearing conductive paste, very easy to use and maintenance is simple.Existing common two kinds common
Brain electric pole electrode, the first brain electrical dry electrode use the hard materials such as metal, plastics or conductive rubber as raw material, utilize grinding tool
It is processed as plate or the electrode with convex shape, using chemical silvering, the method for silvering chlorination or vapor deposition, in electrode
Surface forms stable silver-silver chloride coating, acquires the physiology such as EEG signals by directly contacting for electrode and human skin
Signal.Second of brain electrical dry electrode uses polydimethylsiloxane as flexbile base material, first covers in electrode zone
It is solid on the basis of PEDOT coating with fixed PEDOT conductive coating (polymer of EDOT (3,4-rthylene dioxythiophene monomer))
Change silver-silver chloride coating, electrode is directly fitted into human skin to acquire the physiological signals such as EEG signals.
However, it is found by the inventors that at least there are the following problems in the prior art: it is existing no matter which kind of brain electrical dry electrode, phase
It is improved much compared with the contact impedance for traditional wet electrode between electrode and skin surface, reduces signal accuracy.Example
Such as the first existing brain electrical dry electrode, due to due to the contact impedance height between electrode and skin surface, it is easy to by the external world
The interference of motion artifacts caused by the electromagnetic interference and human motion of environment causes to exist in the signal of acquisition and significantly interfere, is
Reduce interference, it is existing to apply certain pressure to keep the fitting closely to collect as far as possible of electrode and human skin
Stable signal, but since electrode material is harder, it is uncomfortable using initiation human body is easy for a long time.The dry electricity of existing second of brain electricity
Pole uses PDMS to be relatively bonded skin as flexbile base material for the first brain electrical dry electrode, improves using easypro
Appropriateness, however the contact impedance between electrode and skin surface is still higher, is easy to be interfered.
Summary of the invention
Embodiment of the present invention is designed to provide a kind of brain electrical dry electrode and brain wave acquisition equipment, greatly reduces skin
Contact impedance between skin and electrode improves the quality and usage comfort of signal acquisition.
In order to solve the above technical problems, embodiments of the present invention provide a kind of brain electrical dry electrode, be conductively connected pedestal,
Hydrogel and ionic membrane；The hydrogel is arranged on the conductive connection pedestal, and the ionic membrane is tightly attached to the water
The surface of gel；When ionic membrane contact human skin, allow skin surface and include ion the hydrogel carry out from
Son exchange carries out charge-exchange to acquire EEG signals between the conductive connection pedestal of energization and the hydrogel.
Embodiments of the present invention additionally provide a kind of brain wave acquisition equipment, comprising: above-mentioned brain electrical dry electrode.
Embodiment of the present invention in terms of existing technologies, provide it is a kind of include be conductively connected pedestal, hydrogel with
And the brain electrical dry electrode of ionic membrane, on being conductively connected pedestal, ionic membrane is tightly attached to the surface of hydrogel, ion for hydrogel setting
When film contacts human skin, allows skin surface and include the hydrogel progress ion exchange of ion, the conductive connection base of energization
Charge-exchange is carried out between seat and hydrogel to acquire EEG signals, ionic membrane makes electrode surface be able to maintain drying, and
Since hydrogel contains liquid, the steam of human skin surface's release will form moisture film when encountering ionic membrane, two to be in contact
Person is that liquid makes ion be easily achieved exchange therebetween, thus greatly reduces the contact between skin and electrode
Impedance improves the quality of signal acquisition, and ion membrane material more softness can be bonded skin, so that when user uses more
Comfortably.
Include conductive pin thread, conductive sheet, the pedestal with the first opening and have second to open in addition, being conductively connected pedestal
The encapsulated buckle of mouth；The conduction pin thread is fixed on the conductive sheet and the conductive sheet is fixed on the base；Package
There is the hydrogel of the ionic membrane to be located in the opening and be held in the conductive sheet, it is described encapsulated to be fastened on institute
It states on pedestal so that the ionic membrane is fastened in the pedestal, exposes the ionic membrane in second opening.In the present embodiment,
In addition pedestal has groove, and the encapsulated buckle has the second lug boss matched with the groove；By recessed
The encapsulated button is fixed on the pedestal with second lug boss by slot.In the present embodiment, provides and be conductively connected pedestal
A kind of specific constructive form, the conductive connection pedestal by brain electrical dry electrode be assembled into one it is independent can portable foldable production
Product improve compact-sized degree, provide convenience to use.
In addition, the first surface of conductive pin thread has the first lug boss for matching with the conductive female thread, it is described
The second surface of conductive pin thread has the inner fovea part formed by first lug boss；Have and the indent on the conductive sheet
The conductive pin thread and the conductive sheet are fixed on one by the inner fovea part and the protrusion button by the protrusion button that portion matches
It rises.In the present embodiment, a kind of specific fixed form of the conductive pin thread respectively between conductive female thread and conductive sheet is provided, so that
Brain electrical dry electrode can be very easily detachably connected with signal processing mould group.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the block diagram of brain electrical dry electrode according to first embodiment；
Fig. 2 is the structural schematic diagram according to the brain electrical dry electrode of second embodiment.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the present invention
In formula, in order to make the reader understand this application better, many technical details are proposed.But even if without these technical details
And various changes and modifications based on the following respective embodiments, the application technical solution claimed also may be implemented；And
And the division of following each embodiment is for convenience, should not to constitute any limit to specific implementation of the invention
Fixed, each embodiment can be combined with each other mutual utilization under the premise of reconcilable.
The first embodiment of the present invention is related to a kind of brain electrical dry electrodes, are applied to brain wave acquisition equipment, as shown in Figure 1,
Brain electrical dry electrode includes: to be conductively connected pedestal 1, hydrogel 2 and ionic membrane 3.
In present embodiment, the setting of hydrogel 2 is on being conductively connected pedestal 1, and ionic membrane 3 is tightly attached to the table of hydrogel 2
Face；When ionic membrane 3 contacts human skin, allows skin surface and include the hydrogel progress ion exchange of ion, energization is led
It is electrically connected between pedestal 1 and hydrogel 2 and carries out charge-exchange to acquire EEG signals.
In present embodiment, it is conductively connected the letter that pedestal 1 is used to be connected to brain wave acquisition equipment when acquiring EEG signals
Number processing mould group.
The embodiment of the present invention in terms of existing technologies, provide it is a kind of include be conductively connected pedestal, hydrogel with
And the brain electrical dry electrode of ionic membrane, on being conductively connected pedestal, ionic membrane is tightly attached to the surface of hydrogel, ion for hydrogel setting
When film contacts human skin, allows skin surface and include the hydrogel progress ion exchange of ion, the conductive connection base of energization
Charge-exchange is carried out between seat and hydrogel to acquire EEG signals, ionic membrane makes electrode surface be able to maintain drying, and
Since hydrogel contains liquid, the steam of human skin surface's release will form moisture film when encountering ionic membrane, two to be in contact
Person is that liquid makes ion be easily achieved exchange therebetween, thus greatly reduces the contact between skin and electrode
Impedance improves the quality of signal acquisition, and ion membrane material more softness can be bonded skin, so that when user uses more
Comfortably.
The realization details of the brain electrical dry electrode of present embodiment is specifically described below, the following contents is only for convenience
The realization details provided is provided, the necessary of this programme is not implemented.
In one example, hydrogel 2 can select brain electricity/electrocardio hydrogel in common patch water-setting gel electrode,
So without being limited thereto in practice, the present embodiment is not intended to be limited in any the type of hydrogel, such as brain electricity conductive paste also can be selected.
In one example, the bag filter that the small molecular weight materials such as ion can pass freely through can be selected in ionic membrane 3, so real
Without being limited thereto in border, the present embodiment is not intended to be limited in any the concrete type of example film 3.
Second embodiment of the present invention is related to a kind of brain electrical dry electrode.Base of the second embodiment in first embodiment
It improves on plinth, mainly thes improvement is that: in second embodiment of the invention, providing the one kind for being conductively connected pedestal
Specific constructive form.
In present embodiment, includes conductive pin thread 11, conductive sheet 12, has first as shown in Fig. 2, being conductively connected pedestal 1
Opening 131 pedestal 13 and with second opening 141 encapsulated buckle 14；Conductive pin thread 11 is fixed on conductive sheet 12 and leads
Electric piece 12 is fixed on pedestal 13；The hydrogel 2 for being enclosed with ionic membrane 3 is located in the first opening 131 and is held in conductive sheet 12,
Encapsulated buckle 14 is fixed on pedestal 13 so that ionic membrane 3 is fastened in pedestal 13, exposes ionic membrane 3 in the second opening 141.
In present embodiment, conductive pin thread 11 is used for when acquiring EEG signals and conductive female thread is fastened on one；It is conductive
Female thread is connected to the end of brain conductance on line, and the head end of brain conductance on line is connected to the signal processing mould group of brain wave acquisition equipment
On；A kind of specific connection type between brain electrical dry electrode and signal processing mould group is present embodiments provided, by conductive public
The mutual cooperation of button 11 and conductive female thread to be conductively connected and realizes between pedestal 1 and signal processing mould group and easily connect
Connect, and brain electrical dry electrode when not in use, can independently store, and improve portability.
In one example, as shown in Fig. 2, the pedestal 13 with the first opening 131 is annular base, there is the second opening
141 encapsulated buckle 14 is encapsulated ring, so without being limited thereto in practice, specific knot of the present embodiment to pedestal 13 and encapsulated buckle 14
Configuration formula is not intended to be limited in any, such as pedestal 13 is the plinth with the first opening 131, and encapsulated buckle 14 is with second
The rectangular encapsulated buckle of opening 141.
In a specific example, pedestal 13 has groove, and encapsulated buckle 14 has first matched with groove convex
Play portion 142；Encapsulated button 14 is fixed on pedestal 13 by groove and the first lug boss 142, is so here exemplary illustration, this
Embodiment is not intended to be limited in any the fixed form between pedestal 13 and encapsulated buckle 14.As shown in Fig. 2, groove is that annular is recessed
Slot, the first lug boss 142 are annular relief, and annular relief sticks into annular groove to realize pedestal 13 and encapsulated buckle 14
Fixation.So without being limited thereto in practice, the present embodiment does not make any limit to the structure type of groove (or first lug boss 141)
System, such as groove are multiple little grooves being uniformly distributed on pedestal, and the second lug boss is the fixed column matched with little groove.
In one example, as shown in Fig. 2, having limiting groove on conductive female thread, the first surface of conductive pin thread 11 has
Have the second lug boss 111 for matching with the limiting groove on conductive female thread, the second surface of conductive pin thread 11 have by
The inner fovea part that second lug boss is formed；On conductive sheet 12 have matched with inner fovea part protrusion button 121, by inner fovea part with it is convex
It plays button 121 conductive pin thread 11 and conductive sheet 12 are fixed together；So without being limited thereto in practice, the present embodiment is to conductive pin thread 11
Fixed form between conductive sheet 12 is not intended to be limited in any, such as the two can also be fixed together by conductive adhesive layer.
In one example, conductive sheet 12 is fixed on pedestal 13 by mucigel；Right without being limited thereto in practice, this implementation
Example is not intended to be limited in any the fixed form between conductive sheet 12 and pedestal 13.
In one example, conductive pin thread 11 is metal pin thread, the present embodiment, using metal pin thread as conductive pin thread
11, durability is strong and at low cost；So without being limited thereto in practice, conductive pin thread 11 for example can also be to contain graphite or electrically conductive graphite
The conductive material of alkene or carbon fiber etc..
In one example, conductive sheet 12 is conductive plastic film, and so without being limited thereto in practice, the present embodiment is to conductive sheet
Material is formed to be not intended to be limited in any.
In one example, encapsulated ring is the encapsulated ring of metal, i.e., the outer ring 143 of encapsulated ring is metal, and inner ring i.e. first is convex
Playing portion 142 is rubber, and metal outer ring can be good at limiting the circle wall of rubber inner ring.
In one example, the common patch hydrogel electricity of brain electricity/electrocardio institute can be used in conductive pin thread 11 and conductive sheet 12
Component in extremely；So without being limited thereto in practice, the present embodiment does not make the specific constructive form of conductive pin thread 11 and conductive sheet 12
Any restrictions.
Preferably, there is plating silver-silver chloride on the surface of conductive sheet 12 in present embodiment；In the present embodiment, silver-plated-chlorination
Silver can reduce the polarizing voltage between electrode and human skin surface, and make the variable quantity of polarizing voltage also smaller.
The embodiment of the present invention provides a kind of specific structure for being conductively connected pedestal for first embodiment
Form, i.e. conductive connection pedestal include conductive pin thread, conductive sheet, the pedestal with the first opening and the packet with the second opening
Glue buckle, conductive pin thread is fixed on conductive sheet and conductive sheet is fixed on the base；The hydrogel for being enclosed with ionic membrane is located at the
In one opening and it is held in conductive sheet, encapsulated buckle is fixed on the base so that ionic membrane is fastened in pedestal, reveals in the second opening
Ionic membrane out, i.e., conductive connection pedestal provided in an embodiment of the present invention brain electrical dry electrode can be assembled into one it is independent can be just
Foldable product is taken, and improves compact-sized degree, is provided convenience to use.
Third embodiment of the present invention is related to a kind of brain wave acquisition equipment, comprising: first embodiment or the second implementation
Brain electrical dry electrode in mode.
In present embodiment, brain wave acquisition equipment further includes signal processing mould group, and brain electrical dry electrode is used in acquisition brain electricity
It is connect when signal with signal processing mould group.
In one example, signal processing mould group includes operational amplifier and the filtering that input terminal is connected to brain electrical dry electrode
Device, filter are connected to the output end of operational amplifier, and operational amplifier is used for the brain electrical dry electrode acquired to brain electrical dry electrode
It amplifies, filter is for being filtered amplified EEG signals to obtain filtered EEG signals；It is so real
Without being limited thereto in border, the present embodiment is not intended to be limited in any the specific constructive form of signal processing mould group.
Embodiments of the present invention in terms of existing technologies, mention in brain wave acquisition equipment with the embodiment of the present invention
What is supplied includes the brain electrical dry electrode for being conductively connected pedestal, hydrogel and ionic membrane, and hydrogel is arranged on being conductively connected pedestal,
Ionic membrane is tightly attached to the surface of hydrogel, when ionic membrane contacts human skin, allows skin surface and includes the hydrogel of ion
Ion exchange is carried out, charge-exchange is carried out between the conductive connection pedestal and hydrogel of energization to acquire EEG signals, ionic membrane
So that electrode surface is able to maintain drying, and since hydrogel contains liquid, the steam of human skin surface's release is encountering
Will form moisture film when ionic membrane, the two being in contact is that liquid makes ion be easily achieved exchange therebetween, thus
The contact impedance between skin and electrode is greatly reduced, improves the quality of signal acquisition, and ion membrane material is more soft
It can be bonded skin, so that user is more comfortable when using.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiments of the present invention,
And in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811633948.5A CN109567800A (en) | 2018-12-29 | 2018-12-29 | Brain electrical dry electrode and brain wave acquisition equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811633948.5A CN109567800A (en) | 2018-12-29 | 2018-12-29 | Brain electrical dry electrode and brain wave acquisition equipment |
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| CN109567800A true CN109567800A (en) | 2019-04-05 |
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| CN201811633948.5A Pending CN109567800A (en) | 2018-12-29 | 2018-12-29 | Brain electrical dry electrode and brain wave acquisition equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113080980A (en) * | 2021-04-06 | 2021-07-09 | 上海念通智能科技有限公司 | Adjustable electroencephalogram electrode module |
| CN113940678A (en) * | 2021-11-13 | 2022-01-18 | 复旦大学 | An integrated flexible EEG cap that is convenient and comfortable to wear |
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