CN109009105A - A kind of performance characterization method of scalp brain fax sense electrode boundary material - Google Patents
A kind of performance characterization method of scalp brain fax sense electrode boundary material Download PDFInfo
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Abstract
The present invention relates to a kind of performance characterization methods of scalp brain fax sense electrode boundary material, belong to the field of test technology, solve the problems, such as that the prior art can not quantification, systematization Efficient Characterization scalp brain fax sense electrode boundary material comprehensive performance.Performance characterization method disclosed by the invention includes the following steps: to prepare multiple scalp brain electricity sensing testing electrodes for electrode interface material to be characterized；Calibration test is carried out to the grouping of above-mentioned test electrode, obtains the electrochemistry index parameter of every group of test electrode, and then obtain the electrochemistry index parameter of electrode interface material to be characterized；Every group of test electrode is connect with the electrically amplified acquisition system of brain, scalp brain electric analoging signal is acquired, the input impedance of acquisition system is obtained, the quantization comprehensive characterization parameter of scalp brain sensor material is obtained in conjunction with the electrochemistry index parameter of electrode interface material to be characterized obtained above.By the comprehensive characterization parameter, the reasonable selection for scalp brain fax sense electrode boundary material provides basis.
Description
Technical field
The present invention relates to the field of test technology more particularly to a kind of performance characterizations of scalp brain fax sense electrode boundary material
Method.
Background technique
Brain machine interface system can be widely used for the diseases such as dyskinesias, senile dementia, epilepsy, apoplexy diagnosis, treatment or
Recovering aid improves the quality of life for suffering from dyskinesia Disease.For example, the patient with dyskinesia can
With the movement of the signal control wheelchair provided by its brain wave, to assist walking.
With the continuous growth of dyskinesia Disease and aging populations, brain machine interface system is also constantly adding
Speed development.In brain machine interface system, electrode made of scalp brain sensor material is played an important role, performance indicator pair
Entire brain machine interface system has the influence of restriction.The study found that the electrochemical properties of scalp brain sensor material are to electrode
Sensing and transducing performance have extremely important influence, determine the quality of electrode.
Currently, in the design and preparation of scalp brain fax sense electrode, lack a kind of quantification, the method for systematization come it is pre-
First characterize alternative scalp brain sensor material performance, then comprehensively consider the machinability of material, durability etc., and then it is optional
With suitable scalp brain sensor material, electrode design is instructed with this.
Summary of the invention
In view of above-mentioned analysis, the embodiment of the present invention is intended to provide a kind of performance of scalp brain fax sense electrode boundary material
Characterizing method, can not quantification, systematization Efficient Characterization scalp brain sensor material comprehensive performance to solve the prior art
Problem.
On the one hand, the embodiment of the invention provides a kind of performance characterization method of scalp brain fax sense electrode boundary material,
Include the following steps:
For electrode interface material to be characterized, N number of scalp brain electricity sensing testing electrode is prepared；
Calibration test is carried out to the test electrode grouping being prepared, obtains the electrochemistry index of every group of test electrode
Parameter, and then obtain the electrochemistry index parameter of electrode interface material to be characterized；The electrochemistry index parameter includes that direct current loses
Adjust current potential, AC impedance and polarizing voltage amplitude；
Every group of test electrode is connect with the electrically amplified acquisition system of brain, human body scalp brain electric analoging signal is acquired,
The input impedance of acquisition system is obtained, in conjunction with the electrochemistry index parameter of electrode interface material to be characterized obtained above, is obtained
The quantization comprehensive characterization parameter of the electrode interface material to be characterized.
Above-mentioned technical proposal has the beneficial effect that: above-mentioned technical proposal proposes a kind of by DC maladjustment current potential, exchange resistance
Anti-, three kinds of electrochemical parameter indexs of polarizing voltage amplitude are reasonably integrated, and obtain the comprehensive characterization parameter of a quantization, i.e.,
Comprehensive performance parameter, to characterize the comprehensive performance of electrode interface material, the reasonable selection for electrode interface material provides basis.It is real
Shi Shi passes through electrode interface material known to the size of the quantization comprehensive characterization parameter for multiple electrode interface materials to be characterized
Performance it is excellent, in conjunction with technique realize difficulty, cost, optimum electrode boundary material can be selected.
In another embodiment based on the above method, the electricity of the combination electrode interface material to be characterized obtained above
The quantization comprehensive characterization parameter of chemical index gain of parameter scalp brain sensor material, is calculated sector electrode including the use of following formula
The comprehensive characterization parameter of plane materiel material:
In formula, V1Indicate the voltage magnitude of brain electric analoging signal, V2Indicate the polarizing voltage vibration of electrode interface material to be characterized
Width, V3Indicate the DC maladjustment current potential of electrode interface material to be characterized, Z1Indicate the AC impedance of electrode interface material to be characterized,
Z2Indicate the input impedance of the electrically amplified acquisition system of brain.
The beneficial effect of above-mentioned technical proposal is: by the quantization comprehensive characterization parameter, i.e. comprehensive performance parameter, can make
Technical staff intuitively obtains the understanding of an entirety, specifically, the quantization consolidated statement to the comprehensive performance of electrode interface material
Parameter is levied closer to 1, electrode interface material property is more excellent.Convenient for being selected to scalp brain electricity sensing electrode material, improve
Electrode design quality and efficiency.
Further, the scalp brain fax sense electrode boundary material includes at least one of copper, carbon steel, aluminium alloy；
The test electrode uses laminated structure, and cross section uses circle, square, rectangle, triangle, five sides
At least one of shape, hexagon.
The beneficial effect of above-mentioned further scheme is: above-mentioned further scheme is to scalp brain fax sense electrode boundary material
Range is defined, and generally uses at least one of copper, carbon steel, aluminium alloy.Meanwhile electrode cross-section is generally using circle
At least one of shape, square, rectangle, triangle, pentagon, hexagon.
Further, the described pair of test electrode grouping being prepared carries out calibration test, obtains the electricity of every group of test electrode
The step of chemical index parameter includes:
DC maladjustment potential test circuit is built, every group of test electrode is acquired by the DC maladjustment potential test circuit
DC maladjustment current potential；
Ac impedance measurement circuit is built, is hindered by the exchange that the ac impedance measurement circuit acquires every group of test electrode
It is anti-；
Polarizing voltage test circuit is built, circuit is tested by the polarizing voltage and acquires every group of test polarization of electrode electricity
Press amplitude.
The beneficial effect of above-mentioned further scheme is: DC maladjustment current potential has eeg signal acquisition circuit system important
It influences, numerical value is lower, and electrode interface material is more excellent.AC impedance is the external electrical body of electrode interface charge transport capability
It is existing, there is very important influence to the signal-to-noise ratio for extracting nerve signal.AC impedance is smaller, the thermal noise that electrode itself generates
Smaller, the signal for more facilitating acquisition has high s/n ratio, i.e. the performance of electrode interface material is better.Polarizing voltage amplitude is
Electrode interface fluctuates, wave in the case where there is external input voltage since electrode interface material itself generates polarizing voltage
Dynamic size is the size of polarizing voltage amplitude.Polarizing voltage amplitude is smaller, and the sensing capabilities of electrode are better.
Further, every group of test electrode is connect with the electrically amplified acquisition system of brain, to human body scalp brain electric analoging signal into
Row acquisition, the step of obtaining the input impedance of acquisition system include:
Calibration test is carried out to the electrically amplified acquisition system of brain, obtains the input impedance of the electrically amplified acquisition system of the brain；Or
Person,
Every group of test electrode is connect with the electrically amplified acquisition system of the brain respectively, to human body scalp brain electric analoging signal into
Row acquisition, obtains the input voltage and electric current of the corresponding electrically amplified acquisition system of brain of every group of test electrode；
The input voltage of the corresponding electrically amplified acquisition system of brain of all groups of test electrodes and electric current are averaged respectively, obtained
Obtain the average input voltage and average current of the electrically amplified acquisition system of brain；
By the average input voltage divided by average current, the input impedance of the electrically amplified acquisition system of the brain is obtained.
The beneficial effect of above-mentioned further scheme is: by above two method, can obtain the electrically amplified acquisition system of brain
Input impedance, method is simple, easy to operate.
Further, the step of being directed to electrode interface material to be characterized, preparing N number of scalp brain electricity sensing testing electrode packet
It includes:
Electrode interface material to be characterized is prepared into N by machining1The identical prepared electrode of a size, shape；
Calibration test is carried out to the prepared electrode, after rejecting resistance value beyond the preparation electrode of preset range, remaining electricity
It is chosen in extremely N number of as scalp brain electricity sensing testing electrode.
The beneficial effect of above-mentioned further scheme is: in preparation process, in fact it could happen that some underproof test electrodes lead to
Calibration test is crossed, unqualified test electrode can be weeded out, only retains qualified test electrode, therefore can be improved follow-up test
Success rate and accuracy.
Further, described to build DC maladjustment potential test circuit, every group is acquired by DC maladjustment potential test circuit
Test electrode DC maladjustment current potential the step of include:
DC maladjustment potential test circuit is built, the DC maladjustment circuit includes any group of test electrode and high precision electro
Pressure tester, the test pole layout in human skin surface, between be spaced pre-determined distance；The pre-determined distance be 5~
10cm；
The DC maladjustment potential test circuit is respectively adopted to every group of test electrode to measure, is surveyed to high-accuracy voltage
After trying 30~60s of instrument stable reading, the DC maladjustment current potential of every group of test electrode is obtained.
The beneficial effect of above-mentioned further scheme is: above-mentioned test method is relatively simple, and with ac impedance measurement circuit,
The test equipment that polarizing voltage test circuit is selected has repetition, therefore can save testing cost to a certain extent.
Further, described to build ac impedance measurement circuit, every group of test electrode is acquired by ac impedance measurement circuit
AC impedance the step of include:
Ac impedance measurement circuit is built, the ac impedance measurement circuit includes any group of test electrode, signal generation
Device, high-precision current tester, high precision electro pressure tester；Signal generator is connected with high-precision current tester, then with height
Accuracy voltage tester is in parallel；The test pole layout in human skin surface, between be spaced pre-determined distance；It is described it is default away from
From for 5~10cm；
Apply the simple alternating current of 5~20mV, 1~100Hz by signal generator between described any group of two electrodes
Voltage signal is respectively adopted the ac impedance measurement circuit to N/2 group test electrode and measures, obtains every group of test electrode
AC impedance.
The beneficial effect of above-mentioned further scheme is: above-mentioned test method is relatively simple, and with DC maladjustment potential test
The test equipment that circuit, polarizing voltage test circuit are selected has repetition, therefore can save testing cost to a certain extent.
Further, described to build polarizing voltage test circuit, circuit is tested by polarizing voltage and acquires every group of test electrode
Polarizing voltage amplitude the step of include:
Polarizing voltage test circuit is built, the polarizing voltage test circuit includes any group of test electrode, signal generation
Device, high-precision current tester, high precision electro pressure tester；Signal generator is connected with high-precision current tester, then with height
Accuracy voltage tester is in parallel；The test pole layout in human skin surface, between be spaced pre-determined distance；It is described it is default away from
From for 5~10cm；
10~100 μ V are applied by signal generator between described any group of two electrodes, the sinusoidal of 1~100Hz is handed over
Voltage signal is flowed, polarizing voltage test circuit is respectively adopted to N/2 group test electrode and is measured, each group test electrode is obtained
Polarizing voltage amplitude.
The beneficial effect of above-mentioned further scheme is: above-mentioned test method is relatively simple, and with DC maladjustment potential test
The test equipment that circuit, ac impedance measurement circuit are selected has repetition, therefore can save testing cost to a certain extent.
Further, the step of electrochemistry index parameter for obtaining electrode interface material to be characterized includes:
It is averaged to the DC maladjustment current potential of all groups of test electrodes, using result as electrode interface material to be characterized
DC maladjustment current potential；
It is averaged to the AC impedance of all groups of test electrodes, using result as the exchange of electrode interface material to be characterized
Impedance；
It is averaged to all groups of test polarization of electrode voltage amplitudes, using result as electrode interface material to be characterized
Polarizing voltage amplitude.
The beneficial effect of above-mentioned further scheme is: the result that average computation method obtains is more accurate, can be in very big journey
Certain operation error bring is eliminated on degree to be influenced, and method is relatively simple, but can accurately indicate that three kinds of data are respective
Aggregate level, while omitting the difference between individual data items.
It in the present invention, can also be combined with each other between above-mentioned each technical solution, to realize more preferred assembled schemes.This
Other feature and advantage of invention will illustrate in the following description, also, certain advantages can become from specification it is aobvious and
It is clear to, or understand through the implementation of the invention.The objectives and other advantages of the invention can by specification, claims with
And it is achieved and obtained in specifically noted content in attached drawing.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is the step schematic diagram of the performance characterization method of 1 scalp brain fax sense electrode boundary material of the embodiment of the present invention；
Fig. 2 is the electrochemistry index parameter that the embodiment of the present invention 2 obtains every group of test electrode of electrode interface material to be characterized
Step schematic diagram；
Fig. 3 is the step schematic diagram that the embodiment of the present invention 2 prepares N number of scalp brain electricity sensing testing electrode；
Fig. 4 is the DC maladjustment potential step schematic diagram that the embodiment of the present invention 2 obtains electrode interface material to be characterized；
Fig. 5 is 2 DC maladjustment potential test circuit diagram of the embodiment of the present invention；
Fig. 6 is the AC impedance schematic diagram that the embodiment of the present invention 2 obtains electrode interface material to be characterized；
Fig. 7 is 2 ac impedance measurement circuit diagram of the embodiment of the present invention；
Fig. 8 is the polarizing voltage amplitude schematic diagram that the embodiment of the present invention 2 obtains electrode interface material to be characterized；
Fig. 9 is that 2 polarizing voltage of the embodiment of the present invention tests circuit diagram.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention, it is not intended to limit the scope of the present invention.
Embodiment 1
As shown in Figure 1, a specific embodiment of the invention, a kind of scalp brain fax sense electrode boundary material is disclosed
Performance characterization method includes the following steps:
S1. it is directed to electrode interface material to be characterized, is machined, prepares N number of scalp brain electricity sensing testing electrode.
S2. calibration test is carried out to the test electrode grouping being prepared, obtains the electrochemistry of every group of test electrode
Parameter, and then obtain the electrochemical parameter of electrode interface material to be characterized；The electrochemical parameter includes DC maladjustment current potential, hands over
Flow impedance and polarizing voltage amplitude.
S3. every group of test electrode is connect with the electrically amplified acquisition system of brain, human body scalp brain electric analoging signal is adopted
Collection, obtains the input impedance of acquisition system, obtains electrode interface material to be characterized in conjunction with electrochemistry index parameter obtained above
Quantization quantization comprehensive characterization parameter.
Compared with prior art, the present embodiment proposes a kind of by DC maladjustment current potential, AC impedance, polarizing voltage amplitude three
A electrochemical parameter index effectively integrate, to obtain a quantization comprehensive characterization parameter, the i.e. side of comprehensive performance parameter
Method.Comprehensive characterization parameter, to characterize the comprehensive performance of electrode interface material, the reasonable selection for electrode interface material provides base
Plinth.When implementation, for multiple electrode interface materials to be characterized, pass through its correspondence known to corresponding comprehensive characterization parameter size
Have excellent performance degree, combined process realizes the other factors such as difficulty, cost, can select optimum electrode boundary material.This property
Energy characterizing method can be improved electrode design quality and efficiency.
Embodiment 2
It optimizes on the basis of the above embodiments, the electrode interface material to be characterized, i.e. scalp brain fax electrification
At least one of pole boundary material, including copper, carbon steel, aluminium alloy.Test electricity made of the electrode interface material to be characterized
Extremely generally use laminated structure, cross section using circle, in square, rectangle, triangle, pentagon, hexagon extremely
A kind of few or other suitable structures.
As shown in figure 3, step S1 can be refined as following steps:
S11. electrode interface material to be characterized is prepared into N by machining1The identical preparation of a size, shape
Electrode.Specifically, in this step, it is different to need to weed out the size, shape and standard prepared by limit error
Electrode.
S12. calibration test is carried out to preparation electrode, after rejecting resistance value beyond the preparation electrode of preset range, remaining electricity
It is chosen in extremely N number of as scalp brain electricity sensing testing electrode.
Specifically, in the present embodiment, complete by machining production size, shape for each material to be characterized
Exactly the same N number of test electrode slice.The quantity of the test electrode slice of every kind of material should be no less than 6, i.e. N >=6, and N is even number, root
It is selected according to actual demand.Its cross section directly fits with human skin surface and contacts as test contact surface, cross section
Area is not less than 10mm2, highly it is not more than 1cm.When test, selecting the shape of electrode slice cross section is circle, cross-sectional diameter
It is highly 2mm for 6mm.
As shown in Fig. 2, the electrochemistry index parameter that step S2 obtains electrode interface material to be characterized can be refined as walking as follows
It is rapid:
S21. DC maladjustment potential test circuit is built, every group of test is acquired by the DC maladjustment potential test circuit
The DC maladjustment current potential of electrode carries out average and then obtains sector electrode to be characterized to the DC maladjustment current potential of all groups of test electrodes
The DC maladjustment current potential of plane materiel material.DC maladjustment current potential is the difference due to two electrode potentials and is formed in electrode to both ends
Voltage has an important influence eeg signal acquisition circuit system, and numerical value is lower, and electrode interface material is more excellent.
S22. ac impedance measurement circuit is built, the friendship of every group of test electrode is acquired by the ac impedance measurement circuit
Flow impedance carries out exchange that is average and then obtaining electrode interface material to be characterized to the AC impedance of all groups of test electrodes and hinders
It is anti-.AC impedance is that the external electrical of electrode interface charge transport capability embodies, and is had to signal-to-noise ratio when extracting nerve signal
Very important influence.AC impedance is smaller, and the thermal noise that electrode itself generates is smaller, and the Signal-to-Noise of acquisition is higher, electricity
The performance of pole boundary material is better.AC impedance is directly related with the contact area of electrode and human skin, and contact area is bigger,
Corresponding AC impedance is smaller.
S23. polarizing voltage test circuit is built, the pole that circuit acquires every group of test electrode is tested by the polarizing voltage
Change voltage amplitude, all groups of test polarization of electrode voltage amplitudes are carried out average and then obtains electrode interface material to be characterized
Polarizing voltage amplitude.
As shown in figure 4, step S21 can be refined as following steps:
S211. DC maladjustment potential test circuit is built, which includes any group of test electrode and high-precision
Spend voltage tester, which is laid in human skin surface, between be spaced pre-determined distance.The pre-determined distance is 5
~10cm.
S212. the DC maladjustment potential test circuit is respectively adopted to every group of test electrode to measure, to high precision electro
After 30~60s of pressure tester stable reading, the corresponding DC maladjustment current potential of every group of test electrode is obtained.
S213. it is averaged to the corresponding DC maladjustment current potential of all groups of test electrodes, using result as electrode to be characterized
The DC maladjustment current potential of boundary material.Polarizing voltage amplitude is that electrode interface is having the case where external input voltage, due to electrode
Boundary material itself generates polarizing voltage and fluctuates, and the size of fluctuation is the size of polarizing voltage amplitude.Polarizing voltage vibration
Smaller, the sensing capabilities of electrode are better.
Specifically, 6 are randomly selected respectively in the test electrode slice of every kind of material, and be divided into 3 groups, every group 2, exhibition
Open test.Every group of electrode is respectively disposed on human skin surface, is spaced 5cm between two electrodes, tests every group of 2 electricity respectively
The DC maladjustment current potential of interpolar.DC maladjustment potential test circuit diagram is as shown in figure 5, high-precision by 2 electrode access oscillographs etc.
Voltage-measuring equipment is spent, after waiting 30~60s of high-accuracy voltage measuring instrument stable reading, records DC maladjustment current potential.
As shown in fig. 6, step S22 can be refined as following steps:
S221. ac impedance measurement circuit is built, which includes any group of test electrode, signal hair
Raw device, high-precision current tester, high precision electro pressure tester.Wherein, signal generator is connected with high-precision current tester
Together, then it is in parallel with high precision electro pressure tester.The test pole layout in human skin surface, between interval it is default away from
From；The pre-determined distance is 5~10cm.
S222. apply the simple alternating current of 5~20mV, 1~100Hz by signal generator between any group of two electrodes
Voltage signal is respectively adopted the ac impedance measurement circuit to N/2 group test electrode and measures, obtains every group of test electrode
AC impedance.
S223. it is averaged to the AC impedance of all groups of test electrodes, using average result as electrode interface to be characterized
The AC impedance of material.
Specifically, as shown in fig. 7, applying 5~20mV, 1~100Hz by signal generator between every group of two electrodes
Disturbance input signal of the sinusoidal AC voltage signal as electrode system, pass through the high precision instrument for testing device such as oscillograph measurement two
The voltage swing and current signal size applied between a electrode records respective friendship using effective voltage divided by effective current
Flow impedance.
As shown in figure 8, step S23 can be refined as following steps:
S231. polarizing voltage test circuit is built, polarizing voltage test circuit includes any group of test electrode, signal hair
Raw device, high-precision current tester, high precision electro pressure tester.Signal generator and high-precision current tester are connected on one
It rises, then in parallel with high precision electro pressure tester.Pole layout is tested in human skin surface, between be spaced pre-determined distance.It is default
Distance is 5~10cm.
S232. 10~100 μ V are applied by signal generator between any group of two electrodes, the sinusoidal of 1~100Hz is handed over
Voltage signal is flowed, polarizing voltage test circuit is respectively adopted to N/2 group test electrode and is measured, every group of test electrode pair is obtained
The polarizing voltage amplitude answered.
S233. the polarizing voltage amplitude corresponding to all groups of test electrodes is averaged, using average result as to table
The polarizing voltage amplitude of impressing electrode boundary material.
Specifically, it as shown in figure 9, during polarizing voltage amplitude measurement, is applied between 2 electrodes by signal generator
The sinusoidal AC voltage signal for adding 10~100 μ V, 1~100Hz is recorded and saved in 1~10min by high-accuracy voltage table
The ceiling voltage signal of the record slot is subtracted minimum voltage signal, is recorded as by 2 interelectrode voltage swings and its variation
Polarizing voltage amplitude.
When implementation, DC maladjustment current potential characterization parameter, unit area AC impedance and polarizing voltage amplitude characterization parameter are got over
Small, corresponding electrode interface material property is more excellent.It will test after electrode is connect with the electrically amplified acquisition system of brain and carry out brain telecommunications
Number data acquisition, show that the input of the electrically amplified acquisition system of brain is
In formula, V1Indicate the voltage magnitude of brain electric analoging signal, V2Indicate the polarizing voltage vibration of electrode interface material to be characterized
Width, V3Indicate the DC maladjustment current potential of electrode interface material to be characterized, Z1Indicate the AC impedance of electrode interface material to be characterized,
Z2Indicate the input impedance of the electrically amplified acquisition system of brain.
Wherein,For the AC portion of brain electrically amplified acquisition system input,For the electrically amplified acquisition of brain
The direct current component of system input.As AC impedance Z1And V2More hour, just from the input signal obtained of the electrically amplified acquisition system of brain
Closer to original EEG signals V1, the guarantee degree of signal is more preferable, and electrode interface material property is also more excellent.Work as V3More hour, more
It is suitble to the electrically amplified acquisition system design of brain.
By the input of the electrically amplified acquisition system of brain divided by EEG signals V1The parameter value obtained afterwards
As the quantization comprehensive characterization parameter of electrode interface material, i.e. comprehensive performance parameter, P is electrically amplified closer to 1, i.e. brain
Closer to original EEG signals, electrode interface material property is also more excellent for the input of acquisition system.
So far, the quantization comprehensive characterization to electrode interface material property to be characterized is realized.
Compared with prior art, performance characterization method provided in this embodiment makes full use of DC maladjustment current potential, unit plane
Product three electrochemical parameters of AC impedance and polarizing voltage amplitude, complete the quantization comprehensive characterization to electrode interface material property,
Electrode design quality and efficiency can be improved in the characterizing method.
It will be understood by those skilled in the art that realizing all or part of the process of above-described embodiment method, meter can be passed through
Calculation machine program is completed to instruct relevant hardware, and the program can be stored in computer readable storage medium.Wherein, institute
Stating computer readable storage medium is disk, CD, read-only memory or random access memory etc..
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of performance characterization method of scalp brain fax sense electrode boundary material, which comprises the steps of:
For electrode interface material to be characterized, N number of scalp brain electricity sensing testing electrode is prepared；
Calibration test is carried out to the test electrode grouping being prepared, obtains the electrochemistry index ginseng of every group of test electrode
Number, and then obtain the electrochemistry index parameter of electrode interface material to be characterized；The electrochemistry index parameter includes DC maladjustment
Current potential, AC impedance and polarizing voltage amplitude；
Every group of test electrode is connect with the electrically amplified acquisition system of brain, human body scalp brain electric analoging signal is acquired, is obtained
The input impedance of acquisition system, in conjunction with the electrochemistry index parameter of electrode interface material to be characterized obtained above, described in acquisition
The quantization comprehensive characterization parameter of electrode interface material to be characterized.
2. the performance characterization method of scalp brain fax sense electrode boundary material according to claim 1, which is characterized in that institute
State the quantization that scalp brain sensor material is obtained in conjunction with the electrochemistry index parameter of electrode interface material to be characterized obtained above
The comprehensive characterization parameter of electrode interface material is calculated including the use of following formula for comprehensive characterization parameter:
In formula, V1Indicate the voltage magnitude of brain electric analoging signal, V2Indicate the polarizing voltage amplitude of electrode interface material to be characterized,
V3Indicate the DC maladjustment current potential of electrode interface material to be characterized, Z1Indicate the AC impedance of electrode interface material to be characterized, Z2Table
Show the input impedance of the electrically amplified acquisition system of brain.
3. the performance characterization method of scalp brain fax sense electrode boundary material according to claim 1 or 2, feature exist
In the scalp brain fax sense electrode boundary material includes at least one of copper, carbon steel, aluminium alloy；
The test electrode uses laminated structure, and cross section uses circle, square, rectangle, triangle, pentagon, six
At least one of side shape.
4. the performance characterization method of scalp brain fax sense electrode boundary material according to claim 1 or 2, feature exist
In the described pair of test electrode grouping being prepared carries out calibration test, obtains the electrochemistry index parameter of every group of test electrode
The step of include:
DC maladjustment potential test circuit is built, the straight of every group of test electrode is acquired by the DC maladjustment potential test circuit
It is lost and adjusts current potential；
Ac impedance measurement circuit is built, the AC impedance of every group of test electrode is acquired by the ac impedance measurement circuit；
Polarizing voltage test circuit is built, circuit is tested by the polarizing voltage and acquires every group of test polarization of electrode voltage amplitude
Width.
5. the performance characterization method of scalp brain fax sense electrode boundary material according to claim 1 or 2, feature exist
In every group of test electrode is connect with the electrically amplified acquisition system of brain, is acquired, is adopted to human body scalp brain electric analoging signal
The step of input impedance of collecting system includes:
Calibration test is carried out to the electrically amplified acquisition system of brain, obtains the input impedance of the electrically amplified acquisition system of the brain；Alternatively,
Every group of test electrode is connect with the electrically amplified acquisition system of the brain respectively, human body scalp brain electric analoging signal is adopted
Collection, obtains the input voltage and electric current of the corresponding electrically amplified acquisition system of brain of every group of test electrode；
The input voltage of the corresponding electrically amplified acquisition system of brain of all groups of test electrodes and electric current are averaged respectively, obtain institute
State the average input voltage and average current of the electrically amplified acquisition system of brain；
By the average input voltage divided by average current, the input impedance of the electrically amplified acquisition system of the brain is obtained.
6. the performance characterization method of scalp brain fax sense electrode boundary material according to claim 1 or 2, feature exist
In described to be directed to electrode interface material to be characterized, the step of preparing N number of scalp brain electricity sensing testing electrode includes:
Electrode interface material to be characterized is prepared into N by machining1The identical prepared electrode of a size, shape；
Calibration test is carried out to the prepared electrode, after rejecting resistance value beyond the preparation electrode of preset range, in remaining electrode
It chooses N number of as scalp brain electricity sensing testing electrode.
7. the performance characterization method of scalp brain fax sense electrode boundary material according to claim 4, which is characterized in that institute
It states and builds DC maladjustment potential test circuit, the DC maladjustment of every group of test electrode is acquired by DC maladjustment potential test circuit
The step of current potential includes:
DC maladjustment potential test circuit is built, the DC maladjustment circuit includes that any group of test electrode and high-accuracy voltage are surveyed
Try instrument, the test pole layout in human skin surface, between be spaced pre-determined distance；The pre-determined distance is 5~10cm；
The DC maladjustment potential test circuit is respectively adopted to every group of test electrode to measure, to high precision electro pressure tester
After 30~60s of stable reading, the DC maladjustment current potential of every group of test electrode is obtained.
8. the performance characterization method of scalp brain fax sense electrode boundary material, feature according to claim 4 or 7 exist
In, it is described to build ac impedance measurement circuit, the AC impedance of every group of test electrode is acquired by ac impedance measurement circuit
Step includes:
Ac impedance measurement circuit is built, the ac impedance measurement circuit includes any group of test electrode, signal generator, height
Precision current tester, high precision electro pressure tester；The signal generator is connected with high-precision current tester, then with it is high-precision
It is in parallel to spend voltage tester；The test pole layout in human skin surface, between be spaced pre-determined distance；The pre-determined distance
For 5~10cm；
Apply the sinusoidal voltage of 5~20mV, 1~100Hz by signal generator between described any group of two electrodes
Signal is respectively adopted the ac impedance measurement circuit to N/2 group test electrode and measures, obtains the friendship of every group of test electrode
Flow impedance.
9. the performance characterization method of scalp brain fax sense electrode boundary material according to claim 8, which is characterized in that institute
It states and builds polarizing voltage test circuit, circuit is tested by the polarizing voltage and acquires every group of test polarization of electrode voltage amplitude
The step of include:
Polarizing voltage test circuit is built, the polarizing voltage test circuit includes any group of test electrode, signal generator, height
Precision current tester, high precision electro pressure tester；Signal generator is connected with high-precision current tester, then with high precision electro
Pressure tester is in parallel；The test pole layout in human skin surface, between be spaced pre-determined distance；The pre-determined distance is 5
~10cm；
Apply the sinusoidal ac of 10~100 μ V, 1~100Hz by signal generator between described any group of two electrodes
Signal is pressed, polarizing voltage test circuit is respectively adopted to N/2 group test electrode and is measured, each group is obtained and tests polarization of electrode
Voltage amplitude.
10. the performance characterization method of scalp brain fax sense electrode boundary material according to claim 9, which is characterized in that
The step of electrochemistry index parameter for obtaining electrode interface material to be characterized includes:
It is averaged to the DC maladjustment current potential of all groups of test electrodes, using result as the direct current of electrode interface material to be characterized
Imbalance current potential；
It is averaged to the AC impedance of all groups of test electrodes, is hindered result as the exchange of electrode interface material to be characterized
It is anti-；
It is averaged to all groups of test polarization of electrode voltage amplitudes, using result as the polarization of electrode interface material to be characterized
Voltage amplitude.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110074778A (en) * | 2019-05-29 | 2019-08-02 | 北京脑陆科技有限公司 | A kind of extensive brain electrosleep monitoring system based on EEG equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020068931A1 (en) * | 1999-06-04 | 2002-06-06 | Engineering & Research Associates, Inc. | Apparatus and method for real time determination of materials' electrical properties |
| US20020125899A1 (en) * | 2001-03-09 | 2002-09-12 | Lubrizol Corporation | Method and apparatus for on-line monitoring of quality and/or condition of highly resistive fluids |
| CN101726518A (en) * | 2009-12-24 | 2010-06-09 | 福建师范大学 | Method for measuring electrical conductivity of solution |
| US20150351690A1 (en) * | 2013-06-06 | 2015-12-10 | Tricord Holdings, Llc | Modular physiologic monitoring systems, kits, and methods |
| CN107468241A (en) * | 2016-06-07 | 2017-12-15 | 汪子锋 | Brain electricity cap |
| CN107485786A (en) * | 2017-09-18 | 2017-12-19 | 电子科技大学 | A kind of full implantation assessment system for being subcutaneously implanted type cardioverter-defibrillators S_ICD |
| CN108186013A (en) * | 2012-06-08 | 2018-06-22 | 美敦力迷你迈德公司 | Application of the electrochemical impedance spectroscopy in sensing system, equipment and associated method |
-
2018
- 2018-07-26 CN CN201810831114.9A patent/CN109009105B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020068931A1 (en) * | 1999-06-04 | 2002-06-06 | Engineering & Research Associates, Inc. | Apparatus and method for real time determination of materials' electrical properties |
| US20020125899A1 (en) * | 2001-03-09 | 2002-09-12 | Lubrizol Corporation | Method and apparatus for on-line monitoring of quality and/or condition of highly resistive fluids |
| CN101726518A (en) * | 2009-12-24 | 2010-06-09 | 福建师范大学 | Method for measuring electrical conductivity of solution |
| CN108186013A (en) * | 2012-06-08 | 2018-06-22 | 美敦力迷你迈德公司 | Application of the electrochemical impedance spectroscopy in sensing system, equipment and associated method |
| US20150351690A1 (en) * | 2013-06-06 | 2015-12-10 | Tricord Holdings, Llc | Modular physiologic monitoring systems, kits, and methods |
| CN107468241A (en) * | 2016-06-07 | 2017-12-15 | 汪子锋 | Brain electricity cap |
| CN107485786A (en) * | 2017-09-18 | 2017-12-19 | 电子科技大学 | A kind of full implantation assessment system for being subcutaneously implanted type cardioverter-defibrillators S_ICD |
Non-Patent Citations (3)
| Title |
|---|
| LOCATELLI C , 等: "Quantitative Studies on Electrode Material Properties by Means of the Cavity Microelectrode", 《ANALYTICAL CHEMISTRY》 * |
| 徐世伟,等: "6种生物电极在颅脑电阻抗成像中的性能比较研究", 《医疗卫生装备》 * |
| 黄涌,等: "面向穿戴式脑电系统的主动干电极传感器", 《仪表技术与传感器》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110074778A (en) * | 2019-05-29 | 2019-08-02 | 北京脑陆科技有限公司 | A kind of extensive brain electrosleep monitoring system based on EEG equipment |
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