CN108489643A - A kind of piezoelectricity touch sensor based on human skin bionics principle - Google Patents
A kind of piezoelectricity touch sensor based on human skin bionics principle Download PDFInfo
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- CN108489643A CN108489643A CN201810319041.5A CN201810319041A CN108489643A CN 108489643 A CN108489643 A CN 108489643A CN 201810319041 A CN201810319041 A CN 201810319041A CN 108489643 A CN108489643 A CN 108489643A
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- Prior art keywords
- human skin
- cope plate
- lower template
- touch sensor
- piezoelectric membrane
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- 235000001968 nicotinic acid Nutrition 0.000 title claims abstract description 23
- 239000012528 membrane Substances 0.000 claims abstract description 24
- 238000010008 shearing Methods 0.000 claims abstract description 24
- 241000826860 Trapezium Species 0.000 claims abstract description 4
- 239000004020 conductor Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 239000011120 plywood Substances 0.000 claims description 8
- 238000009415 formwork Methods 0.000 claims description 7
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 7
- 230000006870 function Effects 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 239000002033 PVDF binder Substances 0.000 claims description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 3
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 229920005573 silicon-containing polymer Polymers 0.000 claims description 2
- 239000002305 electric material Substances 0.000 claims 1
- 230000003321 amplification Effects 0.000 abstract description 5
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 210000003491 skin Anatomy 0.000 description 20
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003592 biomimetic effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 210000004207 dermis Anatomy 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 229920005594 polymer fiber Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
Abstract
The invention discloses a kind of piezoelectricity touch sensors based on human skin bionics principle, it is characterised in that the sensor includes cope plate, lower template, piezoelectric membrane and electrode;There is nonplanar structure, a surface of lower template to have the corresponding nonplanar structure exactly matched with the nonplanar structure of cope plate on one surface of the cope plate so that connection is inlayed in cope plate and lower template mutual cooperation;The piezoelectric membrane is fixed between cope plate and lower template;The both sides of piezoelectric membrane are mounted on electrode.This piezoelectricity touch sensor novelty simple in structure, propose the three-dimensional drape structure similar to human skin skin corium, it is the on-plane surfaces inter-embedding type structures such as rectangular configuration, wave structure and trapezium structure to be included in X-direction and Y-direction upper section, for planar structure, increase the contact area of piezoelectric membrane, it can play the role of amplification, high sensitivity to faint force signal;And it also can recognize that the position of shearing force.
Description
Technical field
The present invention relates to touch sensor field, specifically a kind of piezoelectricity tactile based on human skin bionics principle passes
Sensor.
Background technology
For robot and other intelligence equipments, tactilely-perceptible is the weight that it obtains external object attribute and contacts information
Want approach.However, relative to the perception such as vision, the sense of hearing, smell and sensing technology, the development of touch sensor also more lags.
The touch sensor in robot is applied, should have can accurately detect space three-dimensional power under circumstances not known
Function and high flexibility the characteristics of.However most of touch sensors currently on the market are difficult to meet intelligent robot to tactile
The requirement of sensor flexible, multi-dimensional nature and multifunctionality can especially detect merely the touch sensor skill of normal force
Already close to maturation, the tactile sensor technology that can detect shearing force relatively lags behind art.Therefore similar human's skin is developed
Touch sensor is particularly important, and there is critically important meaning in the fields such as development and sport, rehabilitation medical to robot technology.
Application No. is 201610267537.3 documents to disclose a kind of artificial skin flexible touch sensation sensor measuring device,
Pedestal is depended on including bionic dermis organized layer, bionical superficial tissue layers, bionical hypodermis layer and artificial skin, wherein bionical
Three liquid core PVDF piezoceramic-polymer fibers are equipped in dermal tissue layer, PVDF piezoelectricity is poly- used by the biomimetic prosthetic skin
Although suffered shearing force can be detected by closing fibres, do not have the functional characteristic to shearing force signal amplification, and the hair
Bright structure does not meet human skin anatomical structure, while complex manufacturing process, consistency are poor.
Invention content
In view of the deficiencies of the prior art, the technical issues of present invention intends to solve is to provide a kind of bionical based on human skin
Learn the piezoelectricity touch sensor of principle.
The technical solution that the present invention solves the technical problem is to provide a kind of pressure based on human skin bionics principle
Electric touch sensor, it is characterised in that the sensor includes cope plate, lower template, piezoelectric membrane and electrode;The cope plate
One surface has nonplanar structure, a surface of lower template corresponding with being exactly matched to the nonplanar structure of cope plate
Nonplanar structure so that cope plate and lower template mutual cooperation inlay connection;The piezoelectric membrane is fixed on cope plate under
Between template;The both sides of piezoelectric membrane are mounted on electrode.
Compared with prior art, advantageous effect of the present invention is:
(1) present invention proposes a kind of using human skin bionics as the piezoelectricity touch sensor of theoretical foundation, structure letter
It is single novel, it is proposed that be similar to the three-dimensional drape structure of human skin skin corium, it is square to be included in X-direction and Y-direction upper section
The on-plane surfaces inter-embedding type structure such as shape structure, wave structure and trapezium structure increases piezoelectric membrane for planar structure
Contact area, amplification, high sensitivity can be played the role of to faint force signal;And it also can recognize that the position of shearing force.
(2) bolster uses flexible material, makes it have the flexible advantage of high flexibility, from the pliability of material more
Close to human skin, similarity is high.
(3) the inter-embedding type various structures used, patterning process are simple, cheap.
(4) piezoelectric membrane is used, high sensitivity, response time short advantage are made it have.
(5) device of auxiliary verificating sensor shearing force enlarging function proposed by the present invention, simple in structure, manufacturability
It is good, it is easy to operate, it is at low cost, it can assist realizing the verification that there is shearing force amplification effect to touch sensor.
Description of the drawings
Fig. 1 is that the present invention is based on a kind of sensors of embodiment of the piezoelectricity touch sensor of human skin bionics principle
The schematic diagram of rectangular cross-section structure;
Fig. 2 is that the present invention is based on a kind of sensors of embodiment of the piezoelectricity touch sensor of human skin bionics principle
Section is the schematic diagram of wave structure;
Fig. 3 is that the present invention is based on a kind of sensors of embodiment of the piezoelectricity touch sensor of human skin bionics principle
Section is the schematic diagram of trapezium structure;
Fig. 4 is that the present invention is based on a kind of detection of embodiment of piezoelectricity touch sensor of human skin bionics principle sensings
The schematic diagram of device shearing force contact position;
Fig. 5 is that the present invention is based on a kind of detection of embodiment of piezoelectricity touch sensor of human skin bionics principle sensings
The pictorial diagram of device shearing force contact position;
Fig. 6 is that the present invention is based on a kind of verifications of the auxiliary of embodiment of piezoelectricity touch sensor of human skin bionics principle
The structural schematic diagram of the device of sensor shearing force enlarging function.(in figure:1, cope plate;2, lower template;3, piezoelectric membrane;4、
Electrode;5, pedestal;6, gravitational load;7, holder;8, pulley;9, top plate;10, lower plywood;11, winding pulley;12, compression bar;
13, Flexible formwork assembly;14, coiling;)
Specific implementation mode
Specific embodiments of the present invention are given below.Specific embodiment is only used for that present invention be described in more detail, unlimited
The application scope of the claims processed.
The piezoelectricity touch sensor that the present invention provides a kind of based on human skin bionics principle is (referring to Fig. 1-3, referred to as
Sensor), it is characterised in that the sensor includes cope plate 1, lower template 2, piezoelectric membrane 3 and electrode 4;The cope plate 1
There is nonplanar two dimension or three-dimensional structure, a surface of lower template 2 to have nonplanar two with cope plate 1 on one surface
The corresponding nonplanar two dimension or three-dimensional structure that dimension or three-dimensional structure exactly match so that 2 phase interworking of cope plate 1 and lower template
Connection is inlayed in conjunction;The cross section at the interface between cope plate 1 and lower template 2 is in on-plane surface state;The piezoelectric membrane 3 is fixed on
Between cope plate 1 and lower template 2, three-decker is formed;The both sides of piezoelectric membrane 3 are mounted on electrode 4, and piezoelectric membrane 3 passes through
Electrode 4 is connect with external charge amplifier.
Nonplanar two dimension or three-dimensional structure are convex-concave structure, specifically rectangular configuration, wavy shaped configuration or trapezoidal
Structure;
The cope plate 1 and the material of lower template 2 are flexible material, can be that flexible resin or flexible rubber etc. are easy
The material of deformation, can select the dimethyl silicone polymer, maximum gauge 3mm, the minimum spacing of adjacent convex-concave structure to be
0.5mm;
Preferably, it when needing detection sensor shearing force contact position, needs in the lower surface of cope plate 1 under
The upper surface of template 2 coats conductive material;Conductive material is required to interval when the surface of cope plate 1 and lower template 2 coats and applies
It covers, there is crosspoint between the conductive material of the upper surface of the lower surface and lower template 2 of cope plate 1 after formation sensor;Example
Conductive material is laterally such as coated in the following table face interval of cope plate 1, conduction material is longitudinally coated in the upper table face interval of lower template 2
Material, the two have crosspoint;In another example the following table face interval in cope plate 1 longitudinally coats conductive material, in the upper table of lower template 2
Laterally coating conductive material, the two have crosspoint to face interval;
The piezoelectric membrane 3 is the flexible conducting material for having frivolous mutability, high sensitivity, response speed fast characteristic,
PVDF materials, maximum gauge 500um can be selected;
Invention also provides it is a kind of auxiliary verificating sensor shearing force enlarging function device (abbreviation device, referring to
Fig. 6), it is characterised in that the device includes pedestal 5, gravitational load 6, holder 7, pulley 8, top plate 9, lower plywood 10, coiling cunning
Wheel 11, compression bar 12, Flexible formwork assembly 13 and coiling 14;The holder 7 is fixed on pedestal 5;The compression bar 12 is mounted on holder 7
On, it can move up and down;One end of the compression bar 12 is equipped with gravitational load 6, and the other end is equipped with pulley 8 by axis;It is described
Pulley 8 is contacted with the upper surface of top plate 9;The adjustable range of the gravitational load 6 is 0N-30N, for applying pretightning force;In advance
Clamp force is transmitted to by compression bar 12 on pulley 8, and top plate 9 is pre-tightened;The winding pulley 11 is mounted on by axis on pedestal 5;Institute
It states 14 one end of coiling to connect with external cupping machine, the other end is connect by winding pulley 11 with top plate 9, top plate 9
It is removable;The lower plywood 10 is fixed on pedestal 5;The lower surface of top plate 9 and the upper surface of lower plywood 10 all have flexibility
Template 13,13 centre of Flexible formwork assembly is the sensor.The Flexible formwork assembly 13 is rubber material;
The present invention is based on the operation principles of the piezoelectricity touch sensor of human skin bionics principle and workflow to be:
Verificating sensor shearing force enlarging function:By device gravitational load 6 provide pretightning force so that sensor it is upper
Template 1 and lower template 2 are contacted with two sheets of flexible template 13 respectively, and top plate 9 is tried by coiling 14 with the stretching for applying shearing force
Test machine connection;When cupping machine applies pulling force, top plate 9 can be relatively moved with lower plywood 10, and then be driven two layers
Flexible formwork assembly 13 relatively moves so that the upper surface of cope plate 1 is generated small Displacement-deformation, upper mold by tangential force
The deformation of plate 1 can drive the deformation of intermediate piezoelectric membrane 3, and because of deformation polarization phenomena can occur for piezoelectric membrane 3, to generate charge
Signal.Since cope plate 1 and lower template 2 use nonplanar structure, intermediate piezoelectric membrane 3 to be pressed into different pleated structures,
It will produce the accumulation polarization of bigger under shearing force, and then the charge signal generated can be more than planar structure.Therefore, this biography
Sensor can realize the amplification to shearing force signal, sensitivity higher.
Detection sensor shearing force contact position:It is coated in the upper surface of lower surface and lower template 2 in cope plate 1 conductive
Material;When there is shearing force in a certain position of cope plate 1, which can deform upon, and piezoelectric membrane 3 below can also be sent out
Raw deformation, to generate electric signal.It is determined by the size of current of the crossover location of 2 conductive material of cope plate 1 and lower template
The position of shearing force, the electric signal at shearing force point is most strong, and the electric signal of other points is relatively weak.Such as Fig. 4 and Fig. 5 institutes
Show, when there is shearing force in encircled, the Article 3 conductive material that cope plate 1 longitudinally coats laterally is applied with lower template 2
At the crossover location of the Article 3 conductive material covered, i.e. electric current at 3-3 ' is maximum, and the electric current of other positions is relatively small, with this
To judge shearing force contact position.
The present invention does not address place and is suitable for the prior art.
Claims (10)
1. a kind of piezoelectricity touch sensor based on human skin bionics principle, it is characterised in that the sensor includes upper mold
Plate, lower template, piezoelectric membrane and electrode;One surface of the cope plate has nonplanar structure, a surface of lower template
The corresponding nonplanar structure exactly matched with the nonplanar structure with cope plate so that cope plate and lower template cooperate
Inlay connection;The piezoelectric membrane is fixed between cope plate and lower template;The both sides of piezoelectric membrane are mounted on electrode.
2. the piezoelectricity touch sensor according to claim 1 based on human skin bionics principle, it is characterised in that institute
It is convex-concave structure to state nonplanar structure.
3. the piezoelectricity touch sensor according to claim 2 based on human skin bionics principle, it is characterised in that institute
It is rectangular configuration, wavy shaped configuration or trapezium structure to state nonplanar structure.
4. the piezoelectricity touch sensor according to claim 2 based on human skin bionics principle, it is characterised in that phase
The minimum spacing of adjacent convex-concave structure is 0.5mm.
5. the piezoelectricity touch sensor according to claim 1 based on human skin bionics principle, it is characterised in that institute
The material for stating cope plate and lower template is flexible resin or flexible rubber.
6. the piezoelectricity touch sensor according to claim 5 based on human skin bionics principle, it is characterised in that institute
The material for stating cope plate and lower template is dimethyl silicone polymer.
7. the piezoelectricity touch sensor according to claim 1 based on human skin bionics principle, it is characterised in that institute
It states piezoelectric membrane and selects flexible conducting material.
8. the piezoelectricity touch sensor according to claim 7 based on human skin bionics principle, it is characterised in that institute
It states piezoelectric membrane and selects PVDF.
9. the piezoelectricity touch sensor according to claim 1 based on human skin bionics principle, it is characterised in that when
When needing detection sensor shearing force contact position, need to lead in the lower surface of cope plate and the coating of the upper surface of lower template
Electric material;Conductive material is required to interval coating when the surface of cope plate and lower template coats, and forms upper mold after sensor
There is crosspoint between the lower surface of plate and the conductive material of the upper surface of lower template.
10. a kind of device of any sensor shearing force enlarging functions of auxiliary verification claim 1-9, it is characterised in that
The device includes pedestal, gravitational load, holder, pulley, top plate, lower plywood, winding pulley, compression bar, Flexible formwork assembly and coiling;
The holder is fixed on the base;The compression bar is rack-mount, can move up and down;One end of the compression bar is equipped with weight
Power loads, and the other end is equipped with pulley by axis;The pulley is contacted with the upper surface of top plate;The winding pulley passes through axis
It is mounted on the base;Described coiling one end is connect with external cupping machine, and the other end is connected by winding pulley and top plate
It connects, top plate is removable;The lower plywood is fixed on the base;The lower surface of top plate and the upper surface of lower plywood all have soft
Property template, be the sensor among Flexible formwork assembly.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110095223A (en) * | 2019-05-29 | 2019-08-06 | 京东方科技集团股份有限公司 | A kind of pressure sensor |
CN111811703A (en) * | 2020-07-21 | 2020-10-23 | 京东方科技集团股份有限公司 | Pressure sensor and electronic device |
CN112577644A (en) * | 2020-10-29 | 2021-03-30 | 扬州大学 | Bionic skin based on liquid core bionic cells |
CN114279602A (en) * | 2021-12-27 | 2022-04-05 | 杭州电子科技大学 | Pressure sensor based on two-dimensional metal sulfide and piezoelectric film and preparation method thereof |
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CN106289595A (en) * | 2015-05-26 | 2017-01-04 | 鸿富锦精密工业(深圳)有限公司 | The force transducer of shearing force can be detected |
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CN208125304U (en) * | 2018-04-11 | 2018-11-20 | 河北工业大学 | A kind of piezoelectricity touch sensor based on human skin bionics principle |
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CN104374498A (en) * | 2013-08-16 | 2015-02-25 | 纳米新能源(唐山)有限责任公司 | Pressure sensor based on friction power generation and pressure sensing system |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110095223A (en) * | 2019-05-29 | 2019-08-06 | 京东方科技集团股份有限公司 | A kind of pressure sensor |
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CN112577644A (en) * | 2020-10-29 | 2021-03-30 | 扬州大学 | Bionic skin based on liquid core bionic cells |
CN114279602A (en) * | 2021-12-27 | 2022-04-05 | 杭州电子科技大学 | Pressure sensor based on two-dimensional metal sulfide and piezoelectric film and preparation method thereof |
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