CN109323782A - A kind of non-array formula super capacitor formula touch sensor and application - Google Patents
A kind of non-array formula super capacitor formula touch sensor and application Download PDFInfo
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- CN109323782A CN109323782A CN201811258145.6A CN201811258145A CN109323782A CN 109323782 A CN109323782 A CN 109323782A CN 201811258145 A CN201811258145 A CN 201811258145A CN 109323782 A CN109323782 A CN 109323782A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Abstract
The present invention is a kind of non-array formula super capacitor formula touch sensor and application, which includes upper electrode layer, lower electrode layer and ionic gel layer and air layer between two electrode layers；It is air layer between the upper electrode layer and ionic gel layer, the ionic gel layer can assemble positive and negative charge in upper and lower surface when being powered；Upper electrode layer connects positive pole a, and lower electrode layer is grounded b, two groups of measuring electrodes is arranged along transverse and longitudinal direction on the upper surface of upper electrode layer, every group of measuring electrode includes two measuring electrodes, the two measuring electrodes are equidistant to upper electrode layer center.The sensor is using non-array formula, using ionic gel layer and air as middle layer, the large area accurate positioning to normal pressure is realized, upper electrode layer is contacted with ionic gel layer when by normal pressure can form super capacitor, to measure the position of normal pressure.
Description
Technical field
The present invention relates to touch sensor, specifically a kind of non-array formula super capacitor formula touch sensor and application should
Sensor can be used to measure the position of normal pressure and/or the size of normal pressure.
Background technique
The required matchmaker that touch sensor is robot and external environment directly acts on, it can directly measurement object and environment it
Between a variety of properties and feature.With social life progress, the interpersonal contact of machine is more and more closer, to robot
Research it is more and more deep, assign its corresponding vision, tactile to realize machine person to person cooperation have important meaning.Touching
Feel that it can directly reflect the various information of surrounding enviroment to robot to the intelligent particularly important of robot is realized.At present
Comparatively vision develops maturation, the development of tactile is also in constantly research and development.The tactile skin studied at present passes
Sensor, major function are and to lack flexibility for experiencing mechanical external force.
Most of existing touch sensor is arrayed tactile sensor.Arrayed tactile sensor is used in large area
When lead it is more, conditioning circuit is complex, and in the production process, if increase electrode width, effective electricity can be increased
Hold, while also will increase the noise capacitor of generation, the contradiction between effective capacitance and noise capacitor can not be solved.
Application No. is 201621268241.5 patents to disclose a kind of capacitive touch with metal layer array
Feel sensor, the pressure sensor design micro structured pattern, preparation for processing is complicated, while using array capacitor, can generate
Very high signal-to-noise ratio, parasitic capacitance are affected, and array capacitor generates more contact conductor, processing technology requirement
Height is not easy to be processed on a large scale.
Summary of the invention
In view of the deficiencies of the prior art, the technical issues of present invention intends to solve is to provide a kind of non-array formula super capacitor
Formula touch sensor and application.The sensor is using non-array formula, using ionic gel layer and air as intermediate
Layer is realized to the accurate positioning of the large area of normal pressure, and contact with ionic gel layer can shape for upper electrode layer when by normal pressure
At super capacitor, to measure the position of normal pressure.
The present invention solve the technical problem the technical solution adopted is that, a kind of non-array formula super capacitor formula tactile is provided
Sensor, it is characterised in that the sensor includes upper electrode layer, lower electrode layer and the ionic gel layer between two electrode layers
And air layer；It is air layer between the upper electrode layer and ionic gel layer, the ionic gel layer can be upper when being powered
Assemble positive and negative charge in lower surface；Upper electrode layer connects positive pole a, and lower electrode layer is grounded b, on the upper surface of upper electrode layer
Two groups of measuring electrodes are set along transverse and longitudinal direction, every group of measuring electrode includes two measuring electrodes, the two measuring electrodes are to upper
Electrode layer center is equidistant.
The sensor further includes piezoelectric layer, and piezoelectric layer is located at the lower surface of lower electrode layer, piezoelectric layer and externally measured charge
Equipment connection.
A kind of application of above-mentioned non-array formula super capacitor formula touch sensor, the sensor are tested for normal pressure,
The process of measurement normal pressure is: two groups of measuring electrodes being connected on the connecting terminal of data collecting card by conducting wire, pass through number
The acquisition to voltage signal is realized according to capture card；Piezoelectric layer is connected to measurement charge device simultaneously, is set using measurement charge
The quantity of electric charge that standby measurement piezoelectric layer generates；
When stimulation of the sensor by normal pressure, so that the strain that compression generates constantly increases, upper electrode layer generates shape
Become, to contact with ionic gel layer, form super capacitor, capacitance changes, and the potential difference of measurement is caused to generate change
Change；In outer detecting circuit collection voltages signal, the measurement method of the measuring electrode selection difference of sensor, according to transverse direction
Longitudinally disposed two groups of measuring electrodes, by the voltage between measurement two arrays of electrodes, to determine forced position；And nethermost pressure
Electric layer generates deformation when by normal pressure, so that piezoelectric material be made to polarize, generates charge, then measured by measurement charge device
The quantity of electric charge of generation, to determine the size of normal pressure.
Compared with prior art, the beneficial effects of the invention are that:
1. super capacitor is applied in sensor in the present invention, flexible electrode is respectively adopted in upper bottom crown, and middle layer is adopted
With ionic gel layer and air layer, overall structure has high flexibility, it can be achieved that the deformation such as stretching, curling, pressing.Overall structure
Thickness is controllable, can be applied to different occasions by the mechanical characteristic and thickness that adjust each layer.
2, the core of sensing principle uses electrostatic electric double layer capacitance (Electrostatic Double- in the present invention
Layer Capacitor,EDLC).Electrostatic electric double layer capacitance is one of principle of super capacitor, i.e., when by normal pressure,
Ionic gel layer upper and lower surface can assemble positive and negative charge respectively, to constitute electric double layer capacitance with upper and lower electrode layer surface respectively
(super capacitor) contacts increase with ionic gel layer with upper electrode layer, and capacitance also increases with it.It is used in the present invention
Super capacitor principle, formed generation capacitance it is higher by four than the capacitance that the common dielectric capacitor of equivalent constructions size generates to
Six orders of magnitude (104-106Times), the signal strength generated is bigger, and sensor signal-to-noise ratio is higher.When by normal pressure, surpass
The formation of grade capacitor, causes the Potential Distributing of electrode layer surface to be affected, determines positive pressure by potential difference between measuring electrode
The position of power also increases the pressure detecting range of sensor due to the formation of super capacitor.
3, inventive sensor is non-array formula touch sensor, according to laterally longitudinally disposed two groups of measuring electrodes, and
The measurement method for selecting difference, is divided into four regions for sensor, by the voltage between measurement two arrays of electrodes, passes to determine
The forced position of sensor greatly reduces than traditional arrayed tactile sensor lead, it can be achieved that large-area applications are determined
Position.There is a lamination electric layer below lower electrode layer simultaneously, piezoelectric material can be generated deformation by normal pressure, to generate electricity
Lotus, the quantity of electric charge of generation can be measured using charge amplifier, and then acquires the size of normal pressure.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of embodiment of non-array formula super capacitor formula touch sensor of the present invention；
Fig. 2 is a kind of electric double layer distribution of charges signal of embodiment of non-array formula super capacitor formula touch sensor of the present invention
Figure；
Fig. 3 is a kind of measuring principle schematic diagram of embodiment of non-array formula super capacitor formula touch sensor of the present invention；
Fig. 4 is that a kind of position of embodiment of non-array formula super capacitor formula touch sensor of the present invention and voltage's distribiuting emulate
Figure；
In figure: 1, upper electrode layer；2, air layer；3, ionic gel layer；4, lower electrode layer；5, piezoelectric layer.
Specific embodiment
The present invention is explained further below with reference to examples and drawings, but does not limit the protection scope of the application with this.
Non-array formula super capacitor formula touch sensor (referring to Fig. 1-3, abbreviation sensor) of the present invention, including upper electrode layer
1, lower electrode layer 4 and ionic gel layer 3 and air layer 2 between two electrode layers；The upper electrode layer and ionic gel
It is air layer 2 between layer 3, ionic gel layer can assemble positive and negative charge in upper and lower surface when being powered；Upper electrode layer connects power supply
Positive a, lower electrode layer are grounded b, and two groups of measuring electrodes, every group of measurement is arranged along transverse and longitudinal direction on the upper surface of upper electrode layer
Electrode includes two measuring electrodes, the two measuring electrodes are equidistant to upper electrode layer center；Two groups of measuring electrodes
Upper electrode layer is divided into four regions by line.
Heretofore described ionic gel layer has flexibility, can form super capacitor with upper electrode layer.
Further characteristic of the invention is that the sensor further includes piezoelectric layer 5, and piezoelectric layer 5 is located under lower electrode layer
Surface, piezoelectric layer 5 are connect with externally measured charge device.The piezoelectric layer 5 is made of piezoelectric material.
The upper electrode layer 1 and lower electrode layer 4 are conductive rubber, form conductive rubber electrode layer.
The process of inventive sensor measurement normal pressure is: two groups of measuring electrodes being connected to data collecting card by conducting wire
Connecting terminal on, the acquisition to voltage signal is realized by data collecting card；Piezoelectric layer is connected to measurement charge simultaneously
Equipment, the quantity of electric charge generated using measuring device measurement piezoelectric layer；
When stimulation of the sensor by normal pressure, so that the strain that compression generates constantly increases, upper electrode layer 1 generates shape
Become, to contact with ionic gel layer 3, form super capacitor, capacitance changes, and the potential difference of measurement is caused to generate change
Change.In outer detecting circuit collection voltages signal, due to the difference of position, between forced position and the measuring electrode of voltage
Distance there are certain relationship, so as to cause the voltage signal of acquisition, there are difference, it is possible thereby to distinguish normal pressure by
The measurement method of power position, the measuring electrode selection difference of sensor exists according to laterally longitudinally disposed two groups of measuring electrodes
Measuring electrode is arranged in the midpoint of the surface of the upper electrode layer of sensor up and down, and left and right directions is one group of measurement voltage,
Up and down direction is one group of measurement voltage, by the voltage between measurement two arrays of electrodes, to determine forced position.And it is nethermost
Piezoelectric layer generates deformation when by normal pressure because using piezoelectric material, so that piezoelectric material be made to polarize, generates charge, then
The quantity of electric charge generated by the measurement of measurement charge device, to determine the size of normal pressure.
The capacitance that super capacitor refers to that material generates is very big, and common dielectric layer material measures generation by experiment
Capacitance is several hundred pF orders of magnitude, and what ionic gel layer generated is its five several magnitudes, in a few μ F orders of magnitude, institute
To use ionic gel layer.The ionic gel layer thickness is minimum, can achieve several hundred micron levels, byIt is found that
Thickness is smaller, then capacitance is higher, and when force acting on transducer, upper electrode layer is contacted with ionic gel layer, forms electrochemical capacitance, from
And increase rapidly capacitance C；ByIt is found that capacitance C increases, measurement voltage U reduces.
Inventive sensor can provide a kind of new measuring principle and method for measuring normal pressure.Upper and lower electrode layer and
Intermediate gel layer surveys the position of normal pressure, and bottom one is laminated electric layer to survey the size of normal pressure.Measure the position of normal pressure
When setting, there is air between ionic gel layer and electrode, when there is normal pressure, ionic gel layer is just generated with upper electrode layer and is contacted,
So as to form super capacitor, this point has formula because of capacitance variationsNamely voltage can generate variation, this
Sample measuring electrode will be changed by the collected voltage of data collecting card, so that it is determined that the position of pressure.
When the present invention is not provided with piezoelectric layer, sensor is simply possible to use in the position of measurement normal pressure, when piezoelectric layer is arranged
Not only the position of normal pressure can have been measured but also be capable of measuring the size of normal pressure.
Fig. 2 is the electric double layer distribution of charges schematic diagram of non-array formula super capacitor formula touch sensor of the present invention, and ion is solidifying
Glue-line 3 uses electric double layer, i.e., assembles positive and negative charge respectively in 3 upper and lower surface of ionic gel layer, and upper electrode layer 1 is assembled just in Fig. 2
Charge, so negative electrical charge is assembled in the upper surface of ionic gel layer 3, positive charge is assembled in lower surface, and lower electrode layer 4 assembles negative electrical charge,
To which ionic gel layer 3 constitutes double capacitors with upper electrode layer 1, lower electrode layer 4 respectively, i.e. capacitance is multiplied；Upper electrode layer
1 positive pole a connects 5V power supply, and lower electrode layer 2 is grounded b (cathode of power supply).A1, a2, a3, a4 are four measuring electrodes, are surveyed
Measuring electrode is connected to measuring circuit plate when amount, obtains two groups of measuring electrodes a1-a2, a3-a4 according to laterally longitudinal,
Embodiment 1
The present embodiment non-array formula super capacitor formula touch sensor, including upper electrode layer 1, lower electrode layer 4, piezoelectric layer 5
And ionic gel layer 3 and air layer 2 between two electrode layers；It is empty between the upper electrode layer and ionic gel layer 3
Gas-bearing formation 2, the ionic gel layer with a thickness of 300 μm, the resistance of ionic gel layer is greater than upper electrode layer, and ionic gel layer
Positive and negative charge can be assembled in upper and lower surface when being powered；Upper electrode layer connects positive pole a, and lower electrode layer is grounded b, is powering on
Two groups of measuring electrodes are set along transverse and longitudinal direction on the upper surface of pole layer, every group of measuring electrode includes two measuring electrodes, this two
A measuring electrode is equidistant to upper electrode layer center, totally four measuring electrodes a1, a2, a3, a4, wherein a1, a3 high level
Measuring electrode；A2, a4 low voltage measure electrode, a1-a2 are located at the midpoint of upper electrode layer upper surface or so, and a3-a4 is located at upper
Midpoint above and below electrode layer upper surface, by the voltage between two groups of measuring electrodes a1-a2, a3-a4 of measurement, to determine stress
Position.Piezoelectric layer 5 is located at the lower surface of lower electrode layer.
Upper electrode layer is divided into four regions by the line of two groups of measuring electrodes.
The present embodiment ionic gel layer 3 uses H3PO4It is made with PVA.Resistance is 1 Μ Ω.
The sensor of the present embodiment is used for normal pressure measurement, when experiment, the counterweight of 50g is placed on a sensor, is led to
The measuring electrode that conducting wire draws measurement voltage is crossed, is connected on the connecting terminal of the data collecting card of the industrial personal computer of Yan Hua company,
Process control is carried out in Labview environment, and the acquisition to voltage signal is realized by data collecting card.Sensor it is big
Small is 100*100*3mm, the model PCL-818HD of data collecting card, the model PCLD-880 of connecting terminal, industrial personal computer
Model IPC-610L.The quantity of electric charge generated simultaneously using charge amplifier measurement piezoelectric layer.The model of charge amplifier
kistlerLabAmp 5167A.
Fig. 4 is the potential profile that the present embodiment sensor Simulation is calculated, and obtains force acting on transducer point by experiment
The real voltage at place carries out the position of calibration power.The size for the quantity of electric charge that piezoelectric layer generates is measured by charge amplifier simultaneously,
To obtain the size of normal pressure.It is measured by experiment, pressure applies point and coincide substantially with the pressure position being calculated, quasi-
Exactness is in allowable range of error.
The present invention does not address place and is suitable for the prior art.
Claims (5)
1. a kind of non-array formula super capacitor formula touch sensor, it is characterised in that the sensor includes upper electrode layer, lower electrode
Layer and ionic gel layer and air layer between two electrode layers；It is air between the upper electrode layer and ionic gel layer
Layer, the ionic gel layer can assemble positive and negative charge in upper and lower surface when being powered；Upper electrode layer connects positive pole a, lower electricity
Pole layer ground connection b, is arranged two groups of measuring electrodes along transverse and longitudinal direction on the upper surface of upper electrode layer, every group of measuring electrode includes two
A measuring electrode, the two measuring electrodes are equidistant to upper electrode layer center.
2. non-array formula super capacitor formula touch sensor according to claim 1, it is characterised in that the ionic gel
The resistance of layer is 1 Μ Ω.
3. non-array formula super capacitor formula touch sensor according to claim 1, it is characterised in that the ionic gel
Layer has flexibility, super capacitor can be formed with upper electrode layer, using H3PO4It is made with PVA.
4. non-array formula super capacitor formula touch sensor according to claim 1 to 3, it is characterised in that the sensing
Device further includes piezoelectric layer, and piezoelectric layer is located at the lower surface of lower electrode layer, and piezoelectric layer is connect with externally measured charge device.
5. a kind of application of non-array formula super capacitor formula touch sensor as claimed in claim 4, which is used for positive pressure
Power test, the process for measuring normal pressure is: two groups of measuring electrodes is connected on the connecting terminal of data collecting card by conducting wire,
The acquisition to voltage signal is realized by data collecting card；Piezoelectric layer is connected to measurement charge device simultaneously, utilizes measurement
Charge device measures the quantity of electric charge that piezoelectric layer generates；
When stimulation of the sensor by normal pressure, so that the strain that compression generates constantly increases, upper electrode layer generates deformation, from
And contacted with ionic gel layer, super capacitor is formed, capacitance changes, and the potential difference of measurement is caused to generate variation；Outside
When portion's detection circuit collection voltages signal, the measurement method of the measuring electrode selection difference of sensor, according to laterally longitudinally disposed
Two groups of measuring electrodes, by the voltage between measurement two arrays of electrodes, to determine forced position；And nethermost piezoelectric layer by
Deformation is generated when normal pressure, so that piezoelectric material be made to polarize, generates charge, then the charge generated by the measurement of measurement charge device
Amount, to determine the size of normal pressure.
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| CN110575600A (en) * | 2019-09-24 | 2019-12-17 | 河北工业大学 | Be applied to miniature pressure sensor of interventional therapy integration in pipe head outer wall |
| CN110763375A (en) * | 2019-11-07 | 2020-02-07 | 南方科技大学 | Dielectric layer, ionic capacitance type flexible touch sensor and preparation method and application thereof |
| CN110763375B (en) * | 2019-11-07 | 2022-04-05 | 南方科技大学 | Dielectric layer, ionic capacitance type flexible touch sensor and preparation method and application thereof |
| CN111982379A (en) * | 2020-07-31 | 2020-11-24 | 鹏城实验室 | Continuous elastic touch sensor and detection method thereof |
| CN114018446A (en) * | 2021-11-01 | 2022-02-08 | 安徽大学 | Partially degradable self-powered pressure sensor, preparation method and test circuit thereof |
| CN114018446B (en) * | 2021-11-01 | 2024-02-13 | 安徽大学 | Partially degradable self-powered pressure sensor, preparation method and test circuit thereof |
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