CN109893131A - A kind of electrode and system for bioelectrical signals sensing - Google Patents
A kind of electrode and system for bioelectrical signals sensing Download PDFInfo
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- CN109893131A CN109893131A CN201910196170.4A CN201910196170A CN109893131A CN 109893131 A CN109893131 A CN 109893131A CN 201910196170 A CN201910196170 A CN 201910196170A CN 109893131 A CN109893131 A CN 109893131A
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- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
本发明公开了一种用于生物电信号感测的电极和系统，本发明通过设置吸收部件吸收电解液，提高电解液的蓄藏量，而且湿电极的信号稳定性较好；另外电极探针设置有覆盖有绝缘保护层的覆盖部，有效避免电极探针长期裸露造成电极使用时长缩短的缺陷，克服现有技术中存在干电极信号稳定较差，湿电极的使用时间短的技术问题，实现了电极使用时间长且信号稳定性好。
The invention discloses an electrode and a system for bioelectrical signal sensing. In the invention, an absorption component is arranged to absorb electrolyte, so as to increase the storage capacity of electrolyte, and the signal stability of the wet electrode is better; in addition, the electrode probe A cover part covered with an insulating protective layer is provided, which effectively avoids the defect that the electrode probe is exposed for a long time and shortens the use time of the electrode, and overcomes the technical problems of poor signal stability of the dry electrode and short service time of the wet electrode in the prior art. The electrode can be used for a long time and the signal stability is good.
Description
Technical field
The present invention relates to bioelectrical signals field, especially a kind of electrode and system for bioelectrical signals sensing.
Background technique
Bioelectrical signals include electrocardio (EGG), brain electric (EEG) or myoelectricity (EMG), wherein brain electricity be brain carry out physiology,
The cortical potential summation of psychological activity.Cerebral disease diagnosis, brain-computer interface, psychological intervention, sleep are supervised in the acquisition and acquisition of brain electricity
The important roles such as survey；Also as the core technology of Cognitive Neuroscience, it is widely used in the fields such as pop psychology, medicine
Scientific research.
So far, electrode for encephalograms can be divided into damage with lossless electrode, although cortex can directly be contacted by damaging electrode,
Skin must be punctured or open cranium, risk is very big.Lossless electrode divides dry electrode and wet electrode again.As its name suggests, dry electrode is exactly electricity
Be at pole and skin contact it is dry (it is also and nisi " dry ", still have micro electrolyte between electrode and skin, such as surrounding ring
The moisture or the sweat on skin in border), such Electrode Operation is convenient, without carrying out special cleaning treatment, but signal-to-noise ratio to scalp
It is lower, stability is poor, be up to the present rarely used in scientific research purposes.
And wet electrode refers in the gap of skin and electrode conducting medium filling, so that in electrode and human skin surface
Form a metal-electrolysis bath interface.Wet electrode is divided into two classes again, one is conductive paste electrode, the skin pricktest with superelevation
The signal of impedance and high s/n ratio has the advantages that excellent electric conductivity, signal stabilization, high Signal-to-Noise, but its disadvantage master
If it is time-consuming and laborious, for example skin cleaning treatment will spend the time；Each electrode will inject amount of conductive cream, to reach scalp
With the good contact of electrode；And detection finishes and must clean hair.The processing of conductive paste formula wet electrode is by conductive paste filling head
Skin --- hair gap, until filling touches electrode, but the amount of conductive paste injection and opportunity are highly dependent on operator
The personal experience of member and skill, conductive paste is more, series connection is easy between electrode adhesion and Different electrodes, if very little, contacted
It is bad.Wet electrode is widely used in terms of scientific research, but the above unfavorable factor makes wet electrode in brain-computer interface, psychology
Assessment and intervene etc. is restricted greatly in terms of practical applications, is also unsuitable for the scientific research of some specific groups, such as old man, small
Child, patient etc..Another wet electrode is Saline-based electrodes, then can avoid the time-consuming and laborious disadvantage of conductive paste electrode, show as nothing
Time-consuming and laborious finish to each electrode injection conductive paste, detection is needed to be not necessarily to wash hair, at present in terms of scientific research and practical application all
Relatively broad use is obtained.But the disadvantage is that salt water is easy to do, it is often small every half that detection cannot continue the long time
When or so must hole-specifically fill salt water, which greatly limits brain power technology scientific research and application field popularization and use, such as I
Can not for traveling in driver every half an hour inject once electrolytic liquid.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to provide a kind of electrode for bioelectrical signals sensing, senses duration for extend electrode.
For this purpose, a second object of the present invention is to provide a kind of systems for bioelectrical signals sensing.
The technical scheme adopted by the invention is that:
In a first aspect, the present invention provides a kind of electrode for bioelectrical signals sensing, including for Electolyte-absorptive
Absorption piece and several electrode catheters, the electrode catheter include the contact portion contacted with the absorption piece, are covered with insulation
The covering part of protective layer and signal acquisition part with the skin contact of testee, the contact portion of the electrode catheter is from the suction
It receives component absorption electrolyte and the signal acquisition part is transported to by the covering part and be discharged.
Further, the electrode further includes the first mounting plate, and the electrode catheter is mounted on first mounting plate,
The covering part of the electrode catheter, signal acquisition part are stretched out from first mounting plate.
Further, the electrode further includes the second mounting plate and shell, and one where the contact portion of the electrode catheter
End is connect with second mounting plate, and the shell is connect respectively with second mounting plate, first mounting plate to constitute
The inside of the closed cavity is arranged in one closed cavity, the absorption piece.
Further, first mounting plate is detachably connected with the shell.
Further, the edge of first mounting plate is all or part of zigzag, and the shell has a groove, institute
It states and is correspondingly arranged on sawtooth portion in groove, the jagged edge of the sawtooth portion and first mounting plate cooperates so that described the
One mounting plate and shell realization are detachably connected.
Further, the liquid filling hole for injecting electrolyte is provided on second mounting plate.
Further, anticorrosion coating is covered on first mounting plate.
Further, first mounting plate further includes contact conductor leading-out portion, the absorption piece and the anticorrosion
Coating contacts, and is provided with contact conductor on the contact conductor leading-out portion, the contact conductor is connect with the anticorrosion coating.
Further, the absorption piece includes sponge.
Second aspect, the present invention provide a kind of system for bioelectrical signals sensing, are used for bioelectricity including described
The electrode of signal sensing.
The beneficial effects of the present invention are:
The present invention improves the amount of saving and preserve of electrolyte, and the signal of wet electrode by setting absorption piece Electolyte-absorptive
Stability is preferable；In addition electrode catheter is provided with the covering part for being covered with insulating protective layer, effectively avoids electrode catheter naked for a long time
The defect that dew causes electrode that duration is used to shorten overcomes and dry electrode signal exists in the prior art stablizes poor, and wet electrode makes
With the technical problem that the time is short, realize that electrode is long using the time and signal stabilization is good.
Detailed description of the invention
Fig. 1 is an a kind of specific embodiment structure of the electrode catheter of the electrode for bioelectrical signals sensing in the present invention
Schematic diagram；
Fig. 2 is an a kind of specific embodiment structural schematic diagram of the electrode for bioelectrical signals sensing in the present invention；
Fig. 3 is an a kind of specific embodiment knot of the first mounting plate of the electrode for bioelectrical signals sensing in the present invention
Structure schematic diagram.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
Embodiment 1
It is a kind of for bioelectrical signals sensing electrode, including for Electolyte-absorptive absorption piece and several electrodes visit
Needle, electrode catheter include the contact portion contacted with absorption piece, the covering part for being covered with insulating protective layer and with testee's
The signal acquisition part of skin contact, contact portion, covering part and signal acquisition part are successively arranged, and the contact portion of electrode catheter is from absorption
Component draws electrolyte and is transported to signal acquisition part by covering part and is discharged.It wherein, is this hair with reference to Fig. 1, Fig. 1
An a kind of bright middle specific embodiment structural schematic diagram of the electrode catheter of the electrode for bioelectrical signals sensing；The present embodiment
In, electrode catheter 1 be nib type electrode catheter, the material of electrode catheter 1 includes hydrophilic resin, specifically, electrode catheter 1 by
Hydrophilic polyesters fiber hybrid resin is fabricated (nib of common free ink pen is made with this material), can inhale easily
Receive electrolytic solution, such as salt water.Electrode catheter 1 is always about 15 millimeters, wherein about 2.5 milli of diameter on the head 9 of electrode catheter 1
Rice, it is 1.2 millimeters long, it is cylindrical；At coniform, the cone tail 10 of electrode catheter 1 (connects with the skin of testee rest part
Contact portion point, i.e. signal acquisition part) about 1-2 millimeter of diameter, somewhat elasticity will not be pierced into skin, pain will not be felt, to people
Body does not have invasive, and nib type electrode catheter can readily pass through hair again.In addition, absorption piece is using strong water absorption function sponge come real
Existing, strong water absorption function sponge plays the role of electrolyte (such as salt water) storage, improves the amount of saving and preserve of electrolyte, the contact of electrode catheter
Portion contacts the cone tail (i.e. signal acquisition part) that electrolyte therein can be quickly directed to electrode catheter with water-absorbing sponge, passes through cone
Tail discharges electrolyte to skin, and electrode catheter is provided with the covering part for being covered with insulating protective layer, uses the time very compared to present
For short Saline-based electrodes, which can extend several times and use the time；Effectively avoid electrode catheter is exposed for a long time from causing electrode
The defect shortened using duration, and the signal stabilization of wet electrode is preferable；Overcome that dry electrode signal exists in the prior art is steady
Fixed poor, the technical problem short using the time of wet electrode, realizes that electrode is long using the time and signal stabilization is good.This implementation
Electrode in example can be widely used in the acquisition of the signals such as electrocardio, brain electricity, myoelectricity, especially for eeg signal acquisition, have very
Good collection effect.
Specifically, with reference to Fig. 1, Fig. 2 and Fig. 3, Fig. 2 be in the present invention it is a kind of for bioelectrical signals sense electrode one
Specific embodiment structural schematic diagram, Fig. 3 are a kind of first mounting plates of the electrode for bioelectrical signals sensing in the present invention
One specific embodiment structural schematic diagram；Electrode further includes the first mounting plate 6, the second mounting plate 4 and shell 5, and shell 5 is respectively with
To constitute a closed cavity, the inside of closed cavity, absorption piece is arranged in absorption piece for two mounting plates 4, the connection of the first mounting plate 6
By taking water-absorbing sponge 8 as an example, wherein shell 5 is cylindrical shell, and the first mounting plate 6 and the second mounting plate 4 are circle, second
Mounting plate 4 is connected with the top of shell 5, and the second mounting plate 4 and shell 5 can be integrally formed or the second mounting plate 4 and shell
It is detachably connected between 5 for screw connection etc.；And the first mounting plate 6 is detachably connected with shell 5, and in the present embodiment, the first peace
The edge of loading board 6 is all or part of zigzag, and the lower part of shell 5 has a groove (not shown), is correspondingly arranged in groove
The jagged edge of sawtooth portion (not shown), sawtooth portion and the first mounting plate 6 cooperates so that the first mounting plate 6 and shell 5 are realized
It is detachably connected, by Sawtooth connection the installation and removal of the first mounting plate 6 is quite convenient to fast.And electrode catheter
One end where 1 contact portion is fixedly connected with the mounting hole 11 on the second mounting plate 4, and in Fig. 2, the number of electrode catheter 1 is with 5
For root, then 5 mounting holes are provided on the second mounting plate 4；Electrode catheter 1 is pacified by the fixation hole 12 on the first mounting plate 6
Dress is fixed on the first mounting plate 6, and correspondingly, the first mounting plate 6 has 5 fixation holes 12；And the covering part of electrode catheter 1,
Signal acquisition part is stretched out from the first mounting plate 6, i.e. the contact site of electrode catheter 1 is in inside cavity, and the covering of electrode catheter 1
Portion and signal acquisition part are stretched out from the first mounting plate 6, and about 3-5 millimeters of the length of the part of stretching, the part of stretching is except electrode spy
It is coated with insulating protective film (i.e. insulating protective layer) outside 10 section of cone tail of needle, one can protect electrode catheter, and two can be with
It avoids contacting with hair and introducing detection noise, three reduce the contact area of electrolyte such as salt water and air, prevent electrolyte
Rapid evaporation.In the present embodiment, water-absorbing sponge 8 is cylindrical stamping forming strong water absorption function sponge, correspondingly, water-absorbing sponge 8
On be provided with 5 through-holes so that electrode catheter 1 passes through and realizes and the contact of water-absorbing sponge 8.In addition, being covered on the first mounting plate 6
It is stamped anticorrosion coating, Ag-AgCl salt tolerants aqueous corrosion metals such as (can also) nickel plating, titanium, gold, tin can be plated；First mounting plate 6 is also
Including contact conductor leading-out portion 7, absorption piece such as water-absorbing sponge 8 contacts realization detection signal (such as brain telecommunications with anticorrosion coating
Number) transmit, it is provided with contact conductor on contact conductor leading-out portion 7, contact conductor is connect with anticorrosion coating.Anticorrosion is set
Coating is conducive to acquire the EEG signals to come from electrode catheter 1 to contact conductor in transmitting, improves the quality of detection signal.Electricity
Power traction line leading-out portion 7 is stretched out just by the notch of lower part one of shell 5, other than having the function of that will test signal draws,
Can also play the role of fixing the first mounting plate 6 and the second mounting plate 4 arbitrarily to rotate.
The electrode of the present embodiment is mounted on same plane (i.e. the using 5 (or less, or more) nib type electrode catheters
One mounting plate, the second mounting plate), hair can be penetrated and scalp is lossless, can be contacted well with scalp, to obtain head
The faint EEG signals in epidermis face；And after unloading electrode, 5 (or less, or more) small water spots are only left on scalp,
It does naturally soon, it is subsequent without cleaning hair, so that being more widely applied；By the way that absorption piece is arranged, the electrode is not only
Have the advantages that high s/n ratio, signal stabilization that traditional wet electrode has, and is avoided that traditional wet electrode is held time
It is short, the disadvantages of washing hair afterwards, easy to operate, can non-volatile recording.
With reference to Fig. 2, it is provided with the liquid filling hole 4 for injecting electrolyte on the second mounting plate 4, in the present embodiment, is provided with
Two liquid filling holes 4 can also fill electrolyte in the midway of signal sensing, achieve the purpose that long time-histories uses using liquid filling hole 4；
In addition, electrode is additionally provided with mounting portion, mounting portion is used to for electrode being fixed on other equipment, in the present embodiment, in shell 5
Lower part is provided with skirt 2, and through-hole 13 is provided on skirt 2, and electrode is mounted on electrode cap with can be convenient by through-hole 13
Or on electrode band, realize that electrode is fixed.
Embodiment 2
Embodiment 2 is provided based on embodiment 1, embodiment 2 provides a kind of system for bioelectrical signals sensing, including reality
Apply the electrode described in example 1 for bioelectrical signals sensing.
It is to be illustrated to preferable implementation of the invention, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations on the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (10)
1. it is a kind of for bioelectrical signals sensing electrode, which is characterized in that including for Electolyte-absorptive absorption piece and
Several electrode catheters, the electrode catheter include the contact portion contacted with the absorption piece, are covered with covering for insulating protective layer
Cover and signal acquisition part with the skin contact of testee, the contact portion of the electrode catheter are drawn from the absorption piece
Electrolyte is simultaneously transported to the signal acquisition part by the covering part and is discharged.
2. the electrode according to claim 1 for bioelectrical signals sensing, which is characterized in that the electrode further includes the
One mounting plate, the electrode catheter are mounted on first mounting plate, the covering part of the electrode catheter, signal acquisition part from
First mounting plate stretches out.
3. the electrode according to claim 2 for bioelectrical signals sensing, which is characterized in that the electrode further includes the
Two mounting plates and shell, one end where the contact portion of the electrode catheter are connect with second mounting plate, the shell point
It is not connect with second mounting plate, first mounting plate to constitute a closed cavity, the envelope is arranged in the absorption piece
The inside of closed chamber body.
4. it is according to claim 3 for bioelectrical signals sensing electrode, which is characterized in that first mounting plate with
The shell is detachably connected.
5. the electrode according to claim 4 for bioelectrical signals sensing, which is characterized in that first mounting plate
Edge is all or part of zigzag, and the shell has a groove, is correspondingly arranged on sawtooth portion, the sawtooth in the groove
The jagged edge of portion and first mounting plate cooperates so that first mounting plate and shell realization are detachably connected.
6. according to the described in any item electrodes for bioelectrical signals sensing of claim 3 to 5, which is characterized in that described the
The liquid filling hole for injecting electrolyte is provided on two mounting plates.
7. the electrode according to any one of claims 2 to 5 for bioelectrical signals sensing, which is characterized in that described the
Anticorrosion coating is covered on one mounting plate.
8. the electrode according to claim 7 for bioelectrical signals sensing, which is characterized in that first mounting plate is also
Including contact conductor leading-out portion, the absorption piece is contacted with the anticorrosion coating, is arranged on the contact conductor leading-out portion
There is contact conductor, the contact conductor is connect with the anticorrosion coating.
9. the electrode according to any one of claims 1 to 5 for bioelectrical signals sensing, which is characterized in that the suction
Receiving component includes sponge.
10. a kind of system for bioelectrical signals sensing, which is characterized in that including the described in any item use of claim 1 to 9
In the electrode of bioelectrical signals sensing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910196170.4A CN109893131B (en) | 2019-03-15 | 2019-03-15 | Electrode and system for bioelectric signal sensing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910196170.4A CN109893131B (en) | 2019-03-15 | 2019-03-15 | Electrode and system for bioelectric signal sensing |
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| CN109893131A true CN109893131A (en) | 2019-06-18 |
| CN109893131B CN109893131B (en) | 2024-09-06 |
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| CN201910196170.4A Active CN109893131B (en) | 2019-03-15 | 2019-03-15 | Electrode and system for bioelectric signal sensing |
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Cited By (2)
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| TWI723732B (en) * | 2019-08-02 | 2021-04-01 | 華廣生技股份有限公司 | Biosensor implantation device and implantation method |
| US11896804B2 (en) | 2019-08-02 | 2024-02-13 | Bionime Corporation | Insertion device for a biosensor and insertion method thereof |
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| US11896804B2 (en) | 2019-08-02 | 2024-02-13 | Bionime Corporation | Insertion device for a biosensor and insertion method thereof |
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| Publication number | Publication date |
|---|---|
| CN109893131B (en) | 2024-09-06 |
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