CN202051701U - Physiological signal collecting electrode and collecting amplifying circuit - Google Patents
Physiological signal collecting electrode and collecting amplifying circuit Download PDFInfo
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- CN202051701U CN202051701U CN2011201117599U CN201120111759U CN202051701U CN 202051701 U CN202051701 U CN 202051701U CN 2011201117599 U CN2011201117599 U CN 2011201117599U CN 201120111759 U CN201120111759 U CN 201120111759U CN 202051701 U CN202051701 U CN 202051701U
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Abstract
The utility model discloses a physiological signal collecting electrode and a collecting amplifying circuit. The physiological signal collecting electrode comprises a carbon conductive rubber physiological signal collecting layer. The collecting amplifying circuit comprises at least a collecting electrode and a signal amplifying circuit, the collecting electrode is connected with the signal amplifying circuit, and the collecting electrode is the physiological signal collecting electrode. The collecting electrode is a carbon conductive rubber collecting layer, thereby avoiding iron penetration and half cell effect of metal electrodes and metal conductive rubber and being capable of contacting with skin of users for a long time without generating toxic and side effect. A base layer is added in the electrode; thereby avoiding negative effect caused by the fact that one conductive rubber layer is too thin and too hard. Simultaneously, the collecting amplifying circuit adopts a mirror circuit formed by a shared reference electrode and a common mode rejection amplifier, thereby effectively eliminating interference signals of collected signals, guaranteeing reality and sensitivity of physiological signals and truly realizing long-term and real-time collection of the physiological signals.
Description
Technical field
This utility model relates to the collection of physiological signal, relates in particular to the ecg signal acquiring electrode and the ecg signal acquiring amplifying circuit of a kind of physiological signal acquisition electrode and use kind electrode.
Background technology
Along with people's living standard is more and more higher, people's health problem is also more and more outstanding.Cardiovascular and cerebrovascular disease, hypertension are in the high-incidence season, and age of onset more and more early.This disease all has the process of a long-term accumulated, and morbidity is also dangerous suddenly.How to monitor the rule of morbidity, giving warning in advance when having the morbidity sign just seems particularly important.
From the angle of medical research and medical field, the operation of each organ that human body earns a bare living all can be followed bioelectric generation and transmission, by for bioelectric research and observation, can understand the ruuning situation of organ comparatively intuitively.Therefore, bioelectricly detect and measure extremely important, and bioelectric detecting must be used detecting electrode.
From detecting on the mode, detecting electrode can be divided into built-in (comprising the formula of thrusting and implanted) substantially; External.The external electrode is that electrode is contacted with body surface, is guided out bioelectrical signals from body surface, is also referred to as " guiding electrode ".In body surface bio electricity testing process, must be true and stable to detected signal.But stable between skin surface and the detecting electrode, to contact reliably be not facile.The instability of contact condition, can directly cause the variation of contact resistance, cause medical circle to be referred to as the distortion of " artifact waveform ", and multichannel detect and the cotype detection in, the variation of contact resistance and uneven very big outer input noise and the power frequency of also can causing are disturbed, even influence is measured.
For addressing the above problem, in bio electricity gatherer process in the past, adopt metal material to make acquisition electrode, make " negative-pressure adsorption " or " stickup " mode, simultaneously the skin of test point is done correspondingly and handled, promptly polish off keratodermatitis, clean, smear conductive paste, in signal acquisition process, contact and contact resistance relatively stable with the relative fixed of skin in the hope of electrode with fine sandpaper.
Though the occupation mode of metal electrode and electrode can detect body surface electric signals, also there are a lot of problems.Metal can cause the infiltration of metallic molecule to skin with contacting of skin, " negative-pressure adsorption " can cause the change of local red and swollen congestion, skin and subcutaneous tissue injury and skin and subcutaneous tissue electric conductivity, also can exert an influence to detect the half-cell effect of verity.
The half-cell effect is that a kind of intrasonic that the metal guide electrode in use forms is disturbed.Its origin cause of formation is: when using the metal guide electrode, form stable contact condition for asking with skin, want cleaning skin in advance, use conductive paste.In testing process, clean solution, conductive paste and a large amount of ionic electrolyte solutions of body surface transudate mixing formation.When electrolyte solution contacted with metal electrode, the atom of metal electrode will lose some electronics and enter solution, and some metal ions in the solution will deposit at surface of metal electrode.During these two kinds of process relative equilibriums, near metal electrode and solution contact surface, form charge distribution layers, also be electric double layer, and it is poor to set up an equilibrium potential.This process and result are just like half electrolytic cell is called as the half-cell effect.When flowing through electrolyte solution and metal electrode, can make metal electrode produce polarization phenomena as electric current (comprising signal code, interfering signal electric current, amplifier input current etc.).Flow through the variation of electric current, will the current potential of half-cell and the polarization phenomena of metal electrode be changed thereupon.And make in the method for paste, in long-time testing process, cause the phenomenon of glandular integumentaria obstruction and skin allergy easily, can not guarantee that the signal that collects is authentic and valid.To physiological signal during than the long duration acquisition and recording (for example: hotler gathers electrocardiosignal) use metal electrode both to limit patient's action, also be difficult to guarantee the true of signals collecting, effectively.
And, use metal electrode to gather the body surface signal and can bring discomfort to human body, especially to child patient, the discomfort of using the metal electrode collection to bring, often cause its waive the inspection or checking process in unpeace cause electrode and contact skin to change, influence testing result or causes detecting and fail.
Conductive rubber refers to that volume resistance is 10
9Ohm/cm is a kind of macromolecule conducting material that is used in the light current field with interior rubber.Being divided into metal according to the difference of conductive filler is conductive rubber and carbon series conductive rubber, metal is that conductive rubber is mixed metal powder and a metallic fiber etc. in rubber, more common conductive filler such as glass silvering, aluminum is silver-plated, silver-colored, nickel is silver-plated, copper is silver-plated and nickel copper-clad etc., these conductive particles are filled in the rubber, when being filled into certain volume parts, being in contact with one another and obtaining electric conductivity.
Have not yet to see the carbon series conductive rubber applications in as the direct report of the physiological signal acquisition electrode of contact human body.
The physiological signal gatherer process should be long-term, real-time process.With the electrocardiosignal is example, the electrocardiogram of electrocardiograph collection is the important means of heart disease diagnosis, existing electrocardiograph is generally 12 systems of leading, need place electrode at the different parts of health, and link to each other with the galvanometric both positive and negative polarity of electrocardiograph by the line that leads, such electrocardiogram acquisition electrode is difficult to realize long-term, the real-time collection of electrocardiosignal.So routine electrocardiogram is patient's short time electrocardio-activity by the electrocardiograph of hospital record under the situation of reposing.And heart attack has a very big occasionality and sudden, and to obtain the probability of disease information very low so do the routine electrocardiogram inspection in non-stage of attack.
Obtain effective monitoring information as need, just need to monitor for a long time, in real time, exactly electrocardiogram (ECG) data.This just requires the long-term and contact skin of ecg signal acquiring electrode energy, can not exert an adverse impact to skin, and the activity of human body can interfering signal yet collection, guarantee the verity of signals collecting, using also needs conveniently, it is simple that operation is wanted, and existing ecg signal acquiring electrode can't satisfy above-mentioned requirements.
In the ecg signal acquiring process, collect two kinds of signals usually: the electrocardiosignal that the first will be gathered promptly is the electrocardiosignal of source to skin conductance with the heart; Its two power frequency electromagnetic field that exists for surrounding space disturbs and other interfering signals to the power frequency of ground conduction by human body and skin with other interfere with electromagnetic field.Be to eliminate interfering signal as common return in the electrocardiograph of routine by the circuit that leads that is called as " contact electrode ", at first from the signal circuit that collects, isolate interfering signal through anti-phase amplification, then through " contact electrode " counter inject in the human body to import respectively to lead by human body eliminate interfering signal.In actual applications, anti-phase interfering signal after the amplification and former interfering signal are actual can not be offset fully, therefore also needs could obtain electrocardiosignal relatively reliably through means such as multiple filters.Therefore electrocardiograph often complex structure, need can't apply in long-term, the real-time monitoring by special messenger's operation in hospital.
Summary of the invention
What the purpose of this utility model was to provide a kind of carbon series conductive rubber can practical physiological signal acquisition electrode.
Physiological signal acquisition electrode of the present utility model comprises a carbon series conductive rubber physiological signal acquisition layer.
Described physiological signal acquisition electrode comprises a carbon series conductive rubber physiological signal acquisition layer and a basic unit, and a physiology signals collecting layer lower surface contacts with the basic unit upper surface, and basic unit's lower surface has the path of electrical connection with physiological signal acquisition layer lower surface.
Above-mentioned basic unit is a sheet metal.
Above-mentioned basic unit is a rubber basic unit, and a physiology signals collecting layer lower surface connects the lead-in wire that passes rubber basic unit.Lead-in wire can conduct electricity.
Above-mentioned basic unit comprises one first sheet metal, rubber basic unit and one second sheet metal; Described physiological signal acquisition layer, first sheet metal, rubber basic unit, second sheet metal stack gradually, and a lead-in wire penetrates rubber basic unit and connects described first sheet metal and second sheet metal.
The thickness of physiological signal acquisition layer of the present utility model is 0.8mm～1.0mm.
The hardness of described rubber basic unit is less than the hardness of described physiological signal acquisition layer, and thickness is greater than the thickness of described physiological signal acquisition layer.
The non-smooth surface that contacts with basic unit of described physiological signal acquisition layer is smooth.
Described physiological signal acquisition layer, first sheet metal, rubber basic unit, second sheet metal adopt method bonding or hot melt to become one.
Another purpose of the present utility model provides a kind of collection amplifying circuit, comprises at least one acquisition electrode, a signal amplification circuit, and acquisition electrode connects signal amplification circuit, and acquisition electrode is above-mentioned physiological signal acquisition electrode.Physiological signal acquisition electrode carbon series conductive rubber physiological signal acquisition layer.
The physiological signal acquisition electrode comprises a carbon series conductive rubber physiological signal acquisition layer and a basic unit, and a physiology signals collecting layer lower surface contacts with the basic unit upper surface, and basic unit's lower surface has the path of electrical connection with physiological signal acquisition layer lower surface.
Above-mentioned basic unit is a sheet metal.
Above-mentioned basic unit is a rubber basic unit, and a physiology signals collecting layer lower surface connects the lead-in wire that passes rubber basic unit.Lead-in wire can conduct electricity.
Above-mentioned basic unit comprises one first sheet metal, rubber basic unit and one second sheet metal; Described physiological signal acquisition layer, first sheet metal, rubber basic unit, second sheet metal stack gradually, and a lead-in wire penetrates rubber basic unit and connects described first sheet metal and second sheet metal.
The thickness of physiological signal acquisition layer of the present utility model is 0.8mm～1.0mm.
The hardness of described rubber basic unit is less than the hardness of described physiological signal acquisition layer, and thickness is greater than the thickness of described physiological signal acquisition layer.
The non-smooth surface that contacts with basic unit of described physiological signal acquisition layer is smooth.
Described physiological signal acquisition layer, first sheet metal, rubber basic unit, second sheet metal adopt method bonding or hot melt to become one.
Acquisition electrode comprises two signals collecting utmost points and shared with reference to the utmost point.The signals collecting utmost point and the shared physiological signal acquisition electrode that adopts foregoing description with reference to the utmost point.
Described signal amplification circuit comprises high impedance isolation prime, and its input connects the lead division of the described two signals collecting utmost points; One signal amplifier, its input is isolated the front stage circuits outfan with high impedance and is connected; Its outfan is connected with the signal amplifier input; One common mode rejective amplifier is connected with the outfan of signal amplifier, and its outfan is connected with reference to the utmost point with shared.
Described two signals collecting are strip very, and shared reference is very circular.
Two signals collecting utmost points are with very centrosymmetry arrangement of shared reference in the described acquisition electrode.
The designing gain that described high impedance is isolated prime is 1.
Physiological signal acquisition electrode of the present utility model adopts a carbon series conductive rubber acquisition layer, and the ion of having avoided metal electrode and metal species conductive rubber to exist infiltrates and the half-cell effect;
Physiological signal acquisition electrode of the present utility model has added basic unit, avoided since conductive rubber when using as electrode because of too thin and the too hard former thereby counter productive brought.
The rubber basic unit that this utility model is lower in conductive rubber acquisition layer peripheral hardware one hardness, thickness is thicker has reduced the integral hardness of electrode; Moreover conductive rubber acquisition layer of the present utility model adopts the elastomeric material that does not contain additive that meets food security standard, has no side effect, and is suitable for using with the human body Long contact time.
By the design of signals collecting layer, sheet metal, rubber basic unit, sheet metal, be the conductive rubber of safety on the one hand with people's contact level; Utilize the conduction of metal material simultaneously, guaranteed the sensitivity and the degree of stability of signal; In addition, the hardness of overall electrode reduces, and eliminates to what human body brought and is not suitable for sense.
Acquisition electrode of the present utility model only uses one or two signals collecting utmost point and shared with reference to the utmost point, and the patient can not need to use 12 crosslinking electrodes to split each position of health as the ordinary electrocardiogram instrument from line operate, needs the special messenger to operate.
Collection amplifying circuit of the present utility model, the utmost point before adopting high impedance to isolate, its impedance that presents is several ten thousand to 100,000 times (numerical value is that hundreds of million is to several begohms) of former input impedance, all can drop to very for a short time to the influence of whole path resistors (comprising the volume resistance of human body conduction resistance, skin conductance resistance, acquisition electrode and contact skin resistance, acquisition electrode etc.) of signal amplifier and resistance variations from spreading out of the signal of telecommunication in the health, can ignore.Therefore acquisition electrode of the present utility model only need touch skin and fixing getting final product, and does not need skin is handled.
Collection amplifying circuit of the present utility model adopts two electrode signal acquisitions and shared reference electrode to be arranged as symmetric mode, and the point midway of common reference electrode between two acquisition electrodes, two electrode signal acquisitions are strip, common reference electrode is circular, making two electrocardiogram acquisition electrodes is symmetrical centre with the common reference electrode, the signal that collects can be decomposed into two equal and opposite in directions, opposite polarity electrocardiosignal (title difference mode signal) and two equal and opposite in directions, the interfering signal that polarity is identical (comprising the power frequency interference) (title common mode interference signal), the transmission path of common mode interference signal is to enter the earth by human body, and its actual reference point is a earth.
The mirror image circuit that adopts common reference electrode and common mode inhibition amplifier to form has effectively been eliminated the interfering signal in the acquired signal, has guaranteed the true and sensitivity of physiological signal.The input of signal amplifier is designed to the anti-common-mode circuit of three end dual inputs.It only does conduction to common-mode signal, and difference mode signal is amplified, and the prime of amplifier (input stage) designing gain is 1 (high impedance isolation).Because the shared of acquisition electrode do not connect the earth with reference to the utmost point, with reference to introducing very big interfering signal extremely equally; Take out the input pin that the common mode interference signal that enters amplifier simultaneously with the physiological signal of being gathered is connected to the common mode inhibition amplifier from the outfan of amplifier, by the common mode inhibition amplifier it is amplified output and is connected to common reference electrode, go up the interfering signal of introducing in order to offset with reference to the utmost point (reaching resistance) with contact skin, be reached for signal amplifier and remove interferential effect, improve the signal to noise ratio of signal amplifier greatly.
Description of drawings
Fig. 1 is the structural representation of the physiological signal acquisition electrode of this utility model embodiment 1;
Fig. 2 is the structural representation of the physiological signal acquisition electrode of this utility model embodiment 2;
Fig. 3 is the structural representation of the physiological signal acquisition electrode of this utility model embodiment 3;
Fig. 4 is the structural representation of the physiological signal acquisition electrode of this utility model embodiment 4;
1-signals collecting layer; The 2-sheet metal; 3-rubber basic unit; The 4-lead-in wire
Fig. 5 is the structural representation of the ecg signal acquiring amplifying circuit of this utility model embodiment 6;
Fig. 6 is the arrangement mode of each utmost point of ecg signal acquiring electrode among Fig. 5;
The 5-electrocardiogram acquisition utmost point; 6-is shared with reference to the utmost point; The 7-high impedance is isolated prime; The 8-ecg amplifier; 9-common mode inhibition amplifier
Fig. 7 is the schematic diagram of the ecg signal acquiring amplifying circuit of the embodiment of the invention 6;
The ecg curve sectional drawing that Fig. 8 is to use ecg signal acquiring amplifying circuit of the present utility model to obtain.
The specific embodiment
The preparation of conductive rubber
With rubber base material and carbon dust mix homogeneously; Pour that curing molding is a carbon series conductive rubber in the pattern into.
This utility model is selected the rubber that meets the state food safety criterion for use, stops the toxic and side effects of rubber.
For reducing owing to ejection adhesion collection in the excretory oils and fats of body surface skin, perspiration and the various bodies taken out of extremely influence testing result in the surface, it is smooth smooth that conductive rubber is pressed close to the one side of skin.
The preparation of electrode
As shown in Figure 1, electrode comprises carbon series conductive rubber physiological signal acquisition layer 1, and its hardness is 65 °, and thickness is about 1mm, volume resistance 100 Ω.For easy to connect with follow-up amplifying circuit etc., the physiological signal acquisition layer can connect a metal lead wire 4 as lead division, and both are connected to form electric pathway.
Electrode comprises carbon series conductive rubber physiological signal acquisition layer 1 and rubber basic unit 3, and both stack gradually, and the connection of physiological signal acquisition layer passes the metal lead wire 4 of rubber basic unit as lead division.Referring to Fig. 2.The thickness of physiological signal acquisition layer 1 is 0.8mm, and volume resistance is 400 Ω.
Rubber-based layer thickness 8mm, with the hardness adding firming agent pattern molding of rubber base material by design, hardness is set in 30 °～35 °.
Physiological signal acquisition layer 1 and rubber basic unit 3 connect as one by the method for bonding or hot melt.Its hardness reduces.
The preparation of conductive rubber
Referring to Fig. 3, electrode comprises carbon series conductive rubber physiological signal acquisition layer 1 and sheet metal 2, and both stack gradually the formation electric pathway.Physiological signal acquisition layer 1, thickness is about 0.8mm, and volume resistance is about 300 Ω.
The preparation of electrode
As shown in Figure 4, acquisition electrode of the present utility model comprises carbon series conductive rubber physiological signal acquisition layer 1, the first sheet metal 2, and the rubber basic unit 3 and second sheet metal stack gradually arrangement for 2, four layers.Be connected to electric pathway with thin metal lead wire 4 (about 0.1mm) between the double layer of metal sheet 2.
The 3 thickness 4mm of rubber basic unit, with the hardness adding firming agent pattern molding of rubber base material by design, hardness is set in 30 °～35 °
Physiological signal acquisition layer 1, the first sheet metal 2, the rubber basic unit 3 and second sheet metal 2 can make it with the method for bonding or hot melt to become one.Like this, the hardness of electrode integral body is far below the hardness of conductive rubber.
Select the foregoing description to obtain any physiological signal acquisition electrode as the ecg signal acquiring electrode, the ecg signal acquiring electrode comprises one or two electrocardiogram acquisition utmost point and shared with reference to the utmost point, and electrocardiogram acquisition is bar shaped very, and shared reference is annular very.
Referring to Fig. 5, the ecg signal acquiring amplifying circuit adopt the two electrocardiogram acquisition utmost points 5 and one shared with reference to the utmost point 6 as the ecg signal acquiring electrode.Gather amplifying circuit 10 and also comprise high impedance isolation prime 7, its input connects the lead division of the described two electrocardiogram acquisition utmost points 5; One heart signal amplifier 8, its input is isolated front stage circuits 7 outfans with high impedance and is connected; One common mode rejective amplifier 9, be connected with the outfan of heart signal amplifier 8, take out common mode interference signal and amplify, its outfan is connected with shared reference electrode 6, the common mode interference signal input of amplifying is shared with reference to the utmost point 6, offset the interfering signal of introducing with reference to the utmost point 6.The outfan of heart signal amplifier 8 connects follow-up signal processing circuit, is about to difference mode signal and takes out the follow-up signal processing circuit of back input, the final ecg curve sectional drawing that obtains as shown in Figure 8.Its electrocardiogram is the curve of top among the figure, and the phase of wave that electrocardio ripple that presents and existing electrocardiograph obtain together.
The operation principle of electrocardiogram acquisition amplifying circuit is referring to Fig. 7, and R1, R2, R3, R4, A1, A2, R5, R6, R7 and R9 have constituted high impedance and isolated prime 7, and designing gain is 1; R8, A3, A4, R10, R11, R12 and R13 have constituted heart signal amplifier 8; A5, A6, R14, R15, R16, R17 and R18 constitute common mode inhibition amplifier 9.
The two electrocardiogram acquisition utmost points, 5 input J1 and J2, shared with reference to the utmost point 6 connection J3.When the two electrocardiogram acquisition utmost points 5 and shared when placing left side, patient shirtfront by the arrangement mode of Fig. 6 with reference to the utmost point 6, if extract a positive electrocardiosignal between J1 and the J3, then extract an inversion signal (specifically the arrangement position by acquisition electrode determines) between J2 and the J3, such electrocardiosignal is exactly a difference mode signal.J1, J2 and J3 extract three in-phase common mode interference signals over the ground simultaneously.
Amplifier A1 and A2 pass to outfan to these two signals with 1: 1 amplification quantity.Amplifier A1 and A2 are transferred to signal the input of amplifier A3 and A4 respectively, amplifier A3 and A4 amplify difference mode signal, common mode interference signal only transmitted do not amplify, on the outfan of amplifier A3 and A4, electrocardiosignal be exaggerated and phase place opposite, common mode interference signal is not exaggerated and homophase.
Be connected the resistance R 12 and the R13 of two similar resistance with the outfan of amplifier A4 at the outfan of amplifier A3, the junction point that links together is K, and for difference mode signal, the K o'clock mid point at two inversion signals, its signal are zero; For common mode interference signal, K o'clock mid point two in-phase signals, its signal is identical with the outfan of two amplifiers, the K point is connected to the common mode inhibition amplifier input terminal, the outfan of common mode inhibition amplifier is connected with reference to the utmost point with shared by J3, then the common mode interference signal that obtains from the K point anti-phase again be input to shared with reference to the utmost point, skin with the J3 contact resistance on interfering signal just just the same with the zero point of gathering amplifying circuit to shared signal with reference to the utmost point, also just played the effect of eliminating common mode interference signal.
The electrocardiogram acquisition utmost point 5 and sharedly can adopt any physiological signal acquisition electrode among the embodiment 1-4 with reference to the utmost point 6.The electrocardiogram acquisition utmost point 5 and shared visible Fig. 6 of arrangement mode when using with reference to the utmost point 6.The two electrocardiogram acquisition utmost points 5 are bar shaped, and shared is annular with reference to the utmost point 6, with shared be the center with reference to the utmost point 6, the electrocardiogram acquisition utmost point 5 symmetric arrays.
Claims (14)
1. a physiological signal acquisition electrode is characterized in that, comprises a carbon series conductive rubber physiological signal acquisition layer.
2. physiological signal acquisition electrode according to claim 1, it is characterized in that, described physiological signal acquisition electrode comprises a physiology signals collecting layer and a basic unit, one physiology signals collecting layer lower surface contacts with the basic unit upper surface, and basic unit's lower surface has the path of electrical connection with physiological signal acquisition layer lower surface.
3. physiological signal acquisition electrode according to claim 2 is characterized in that, described basic unit is a sheet metal;
4. physiological signal acquisition electrode according to claim 2 is characterized in that, described basic unit is a rubber basic unit, and physiological signal acquisition layer lower surface connects the lead-in wire that passes rubber basic unit;
5. physiological signal acquisition electrode according to claim 2, it is characterized in that, it is characterized in that, described basic unit comprises one first sheet metal, rubber basic unit and one second sheet metal, described physiological signal acquisition layer, first sheet metal, rubber basic unit, second sheet metal stack gradually, and a lead-in wire penetrates rubber basic unit and connects described first sheet metal and second sheet metal.
6. physiological signal acquisition electrode according to claim 1 is characterized in that, the thickness of described physiological signal acquisition layer is 0.8mm～1.0mm.
7. physiological signal acquisition electrode according to claim 5 is characterized in that, the hardness of described rubber basic unit is less than the hardness of described physiological signal acquisition layer, and thickness is greater than the thickness of described physiological signal acquisition layer.
8. physiological signal acquisition electrode according to claim 2 is characterized in that, the non-smooth surface that contacts with basic unit of described physiological signal acquisition layer is smooth.
9. physiological signal acquisition electrode according to claim 5 is characterized in that, described physiological signal acquisition layer, first sheet metal, rubber basic unit, second sheet metal adopt method bonding or hot melt to become one.
10. a collection amplifying circuit that uses each described physiological signal acquisition electrode of claim 1-9 is characterized in that, comprises at least one acquisition electrode, a signal amplification circuit.
11. collection amplifying circuit according to claim 10 is characterized in that, acquisition electrode is the two signals collecting utmost points and shared with reference to the utmost point, the signals collecting utmost point and shared all be the physiology electrode signal acquisition with reference to the utmost point.
12. collection amplifying circuit according to claim 11 is characterized in that, signal amplification circuit comprises a high impedance isolation prime, a signal amplifier and a common mode rejective amplifier; The two signals collecting utmost points connect the input that high impedance is isolated prime, and high impedance is isolated the input of the outfan connection signal amplifier of prime; The outfan of signal amplifier connects the common mode inhibition amplifier input terminal; The outfan of common mode inhibition amplifier connects shared with reference to the utmost point.
13. collection amplifying circuit according to claim 11 is characterized in that described signals collecting is strip very, common reference electrode is an annular.
14. collection amplifying circuit according to claim 12 is characterized in that, the designing gain that high impedance is isolated prime is 1.
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| CN2011201117599U CN202051701U (en) | 2011-04-15 | 2011-04-15 | Physiological signal collecting electrode and collecting amplifying circuit |
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| CN2011201117599U CN202051701U (en) | 2011-04-15 | 2011-04-15 | Physiological signal collecting electrode and collecting amplifying circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107582053A (en) * | 2017-09-12 | 2018-01-16 | 深圳麦格米特电气股份有限公司 | A kind of active electrode detection means of electroretinogram and dynamic electroculogram |
| CN111654784A (en) * | 2020-04-29 | 2020-09-11 | 柏建民 | Direct-selection amplification universal circuit scheme for weak signals in complex signal environment and implementation method |
| CN118000705A (en) * | 2024-04-08 | 2024-05-10 | 杭州永川科技有限公司 | Electrode strip and bioelectric signal measuring method |
-
2011
- 2011-04-15 CN CN2011201117599U patent/CN202051701U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107582053A (en) * | 2017-09-12 | 2018-01-16 | 深圳麦格米特电气股份有限公司 | A kind of active electrode detection means of electroretinogram and dynamic electroculogram |
| CN111654784A (en) * | 2020-04-29 | 2020-09-11 | 柏建民 | Direct-selection amplification universal circuit scheme for weak signals in complex signal environment and implementation method |
| CN118000705A (en) * | 2024-04-08 | 2024-05-10 | 杭州永川科技有限公司 | Electrode strip and bioelectric signal measuring method |
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Granted publication date: 20111130 Termination date: 20140415 |