CN105115413B - A kind of matched two dimensional plane strain field test sensing element of modulus and preparation method thereof - Google Patents
A kind of matched two dimensional plane strain field test sensing element of modulus and preparation method thereof Download PDFInfo
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- CN105115413B CN105115413B CN201510395988.0A CN201510395988A CN105115413B CN 105115413 B CN105115413 B CN 105115413B CN 201510395988 A CN201510395988 A CN 201510395988A CN 105115413 B CN105115413 B CN 105115413B
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Abstract
A kind of matched two dimensional plane strain field test sensing element of modulus and preparation method thereof, belongs to sensing element and preparation method thereof.It is made of the sensing element display and the insulating protective film of transverse electrode, the heat insulating lamina of third layer, the 4th layer of longitudinal electrode and layer 5 of the thin plate of first layer, the second layer；The thin plate of first layer is plastics or rubber sheet；The sensing element display and transverse electrode of the second layer, are printed on using the method for printing on the thin plate of first layer；The heat insulating lamina of third layer is printed using resin or rubber；4th layer of longitudinal electrode is equally formed using printing method；The insulating protective film of layer 5 is printed using resin or rubber.Sensing element can realize the test of two dimensional plane strain field, and synchronous strain is preferably reached with measurand, and the dependent variable tested will be more accurate, and strain testing range also disclosure satisfy that, measuring accuracy improves；In addition, this method, using typography, at low cost in the case of batch production, effect is good.
Description
Technical field
The present invention relates to a kind of sensing element and preparation method thereof, especially a kind of matched two dimensional plane strain field of modulus
Test sensing element and preparation method thereof.
Background technology
Method currently used for two dimensional plane strain field mainly has contact measuring method and non-contact measurement method, wherein contacting
Mensuration is mainly tested using the resistance strain plate of multiple spot, and this method is layouted limited, and strain gauge size is larger, separately
Outer each strain gauge will pick out p-wire, occupy big quantity space, influence measuring accuracy；Have in non-contact measurement method and represent
Property be digital image method, this method can only be applicable under the conditions of uniaxial and transparent pressure room (hydraulic oil), measuring mechanism sheet
Body limits the application range of this method.
The conventional, electric-resistance foil gauge used in contact measurement method, it is the constantan wire or nickel by Φ=0.02-0.05mm
Chromium filament winding is clipped in two layers of heat insulating lamella (substrate) into palisade (or being corroded with very thin metal foil into palisade) and is made, this strain
The sensitivity of piece is about 2, and strain testing effective range is about 0.5%, for the elasticity modulus such as rock, concrete, steel construction compared with
Big material strain variation smaller (being less than 0.5%) is relative efficiency when testing.And for the smaller material of other modulus, such as
Various plastics, rubber etc., the strain of these materials is generally large, and the modulus of resistance strain gage is surveyed relatively larger than these materials
It is difficult to ensure that reaching synchronous deformation during examination, so strain testing can not be completed.The new big plastic strain measurement occurred in recent years
Strain gauge is fabricated using the constantan sensitivity grid material and polyimide substrate material of full annealing, has good high extension
Property, high elongation rate, strain testing effective range efficiently solve large strain test problem 10% or so.But due to poly-
The limitation of this material in acid imide base, this strain gauge are relatively more suitable for the strain testing of bigger modulus material, thus limit
Its use scope has been made, it can not be effectively to the strain testing of the materials such as the smaller plastics of modulus, rubber and the soil body.
In view of above-mentioned two dimensional plane strain field measurement present situation, develops the matched two dimensional plane strain field test sensing of modulus
Element and preparation method thereof provides new test biography for the two dimensional plane strain field test of a variety of materials in engineering and laboratory experiment
Sensing unit.
The content of the invention
Technical problem：The invention aims to provide a kind of high sensitivity, strain range the big matched two dimension of modulus
Plane strain field test sensing element and preparation method thereof.
Technical solution：The object of the present invention is achieved like this：Two dimensional plane strain field test sensing element has first
Layer is sensing element display and transverse electrode, the heat insulating lamina of third layer, the 4th layer of the longitudinal direction electricity of the thin plate of bottom, the second layer
Pole and the insulating protective film on layer 5, that is, upper strata, first layer, the second layer, third layer, the 4th layer and layer 5 are linked in sequence.
The production method of sensing element first according to the elasticity modulus size of tested object, selects modulus compared with smaller one
A little thin plate, sensing element display matrix, electrode material, heat insulating lamina and insulation protection membrane materials；Then by conductive black or
Carbon nanotubes carries out mixed preparing conductive polymer composite with sensing element display matrix, and is printed on selected
Sensing element display layer is formed on thin plate；The electrode material chosen also is printed on bottom plate afterwards and forms transverse electrode, and even
Connect sensing element display；Then heat insulating lamina is printed using selected heat insulating lamina material, republishes longitudinal electrode, insulated
Thin layer is between transverse electrode and longitudinal electrode, by two layers of electrode insulation；Finally, selected insulation protection membrane material is printed
It brushes and forms insulation protection film layer in top layer, play a protective role.
The thin plate is a kind of plastics or rubber material, 0.1~0.3mm of thickness；Sensing element display matrix is a kind of
Resin or rubber material, are sufficiently mixed with conductive black or carbon nanotubes as conductive polymer composite；Electrode material
The conductive silver paste or will be combined in conductive silver powder addition rubber that adapted is sold in the market；Insulating layer is selected with insulating protective film
Select identical resin or rubber material；It is printed again after once printing layer is fully cured on ensureing when printing.
Advantageous effect, as a result of said program, the thin plate of first layer (lowest level) uses plastic plate or rubber slab, so
Carbon black or carbon nanotubes casting resin or the conductive polymer composite of rubber-based are printed on thin plate afterwards, after cured shape
It is displayed into sensing element, then electrode material is printed on thin plate, there is certain overlapping, guarantor in printing position with sensing element display
Card is conductively connected, and forms transverse electrode layer.Afterwards resin or rubber material are printed to form heat insulating lamina, republish electrode material
Longitudinal electrode is formed, the purpose of heat insulating lamina is to ensure to insulate between transverse electrode and longitudinal electrode, forms open circuit.It finally will tree
Fat or rubber material are printed in layer 5 (top layer), cover the sensing element display being located below and electrode, play insulation and protect
The effect of shield.Thin plate, sensing element display matrix, electrode material, heat insulating lamina and insulation protection membrane material are according to measurand
Elasticity modulus size select, accomplish that the elasticity modulus for all material selected is approached with measurand, be conducive to be tested pair
As that when generating strain sensing element can be driven to strain together, reach synchronous strain, ensure the accuracy of test.Sensitive member
Part display has strain sensitivity, and respective change occurs for its resistance value when straining, to corresponding position strain size progress
Test.Transverse electrode mainly plays the role of connecting test equipment with longitudinal electrode and is displayed with sensing element, is resistance test
Data cable.The insulating protective film of top layer is that insulation is acted on waterproofing protection, sensing element display and electrode is avoided to be exposed to ring
It is interfered in border, influences measuring accuracy.
Making two dimensional plane strain field test sensing element, it can be achieved that a variety of materials two dimensional plane strain field test,
Major advantage has：
1st, it is simple in structure, it makes simply, using typography, can be mass, it is at low cost.
2nd, portion of material is respectively formed according to the elasticity modulus selection sensing element of tested object, it is ensured that same during test
Step deformation, ensure that measuring accuracy and strain testing range.
3rd, conductive polymer composite is made sensing element display so that sensing element have it is highly sensitive,
Strain the features such as range is big.
Description of the drawings：
Fig. 1 is that the schematic diagram of sensing element is tested in a kind of matched two dimensional plane strain field of modulus of the present invention.
Fig. 2 is the first layer thin plate figure of the present invention.
Fig. 3 is the second layer sensing element array of the present invention and transverse electrode figure.
Fig. 4 is the third layer heat insulating lamina figure of the present invention.
Fig. 5 is the 4th layer of longitudinal electrode figure of the present invention.
Fig. 6 is the layer 5 insulating protective film figure of the present invention.
In figure, 1, thin plate；2nd, sensing element displays；3rd, transverse electrode；4th, heat insulating lamina；5th, longitudinal electrode；6th, insulation is protected
Cuticula.
Specific embodiment：
The embodiment of the present invention is further described below in conjunction with the accompanying drawings：
Two dimensional plane strain field test sensing element has the sensing element display of the first layer i.e. thin plate of bottom, the second layer
With transverse electrode, the heat insulating lamina of third layer, the 4th layer of longitudinal electrode and the insulating protective film on layer 5, that is, upper strata, first
Layer, the second layer, third layer, the 4th layer and layer 5 are linked in sequence.
The production method of sensing element first according to the elasticity modulus size of tested object, selects modulus compared with smaller one
A little thin plate, sensing element display matrix, electrode material, heat insulating lamina and insulation protection membrane materials；Then by conductive black or
Carbon nanotubes carries out mixed preparing conductive polymer composite with sensing element display matrix, and is printed on selected
Sensing element display layer is formed on thin plate；The electrode material chosen also is printed on bottom plate afterwards and forms transverse electrode, and even
Connect sensing element display；Then heat insulating lamina is printed using selected heat insulating lamina material, republishes longitudinal electrode, insulated
Thin layer is between transverse electrode and longitudinal electrode, by two layers of electrode insulation；Finally, selected insulation protection membrane material is printed
It brushes and forms insulation protection film layer in top layer, play a protective role.
The thin plate is a kind of plastics or rubber material, 0.1~0.3mm of thickness；Sensing element display matrix is a kind of
Resin or rubber material, are sufficiently mixed with conductive black or carbon nanotubes as conductive polymer composite；Electrode material
The conductive silver paste or will be combined in conductive silver powder addition rubber that adapted is sold in the market；Insulating layer is selected with insulating protective film
Select identical resin or rubber material；It is printed again after once printing layer is fully cured on ensureing when printing.
The material of thin plate 1, the basis material of sensing element display 2, transverse electrode 3 and longitudinal electrode 5 material, insulate it is thin
Layer 4 and the material of insulating protective film 6 need to correspondingly select the smaller material of modulus according to the elasticity modulus of measurand.
Sensing element display 2 is printed using conductive polymer composite.
Conductive polymer composite is conductive black or carbon nano-tube filled rubber-based or polymer matrix composites.
Embodiment 1：As shown in Figure 1, a kind of matched two dimensional plane strain field test sensing element of modulus of the present invention, it
By sensing element display 2 and the transverse electrode 3 of the thin plate 1 of first layer, the second layer, the heat insulating lamina 4 of third layer, the 4th layer vertical
It is formed to the insulating protective film 6 of electrode 5 and layer 5.The object for the strain testing of being carried out is concrete structure, and selection is elastic
Thin plate 1 of the smaller epoxy resin board of modulus as first layer, the thickness of thin plate 1 select 0.3mm.The sensitivity of the second layer
Element display 2 selects epoxy resin as matrix, and conductive black is configured to conductive polymer composite as filler,
Then it is printed on thin plate 1；It is before printing that 1 upper surface solvent scouring of thin plate is clean, ensure printing effect.The transverse direction of the second layer
Electrode 3 is equally printed onto using the printable conductive silver paste bought in the market on thin plate 1, sensing element display 2 and laterally electricity
There is overlapping between pole 3, ensure reliable electrical connection.The heat insulating lamina 4 of third layer selects epoxide resin material to be directly printed on
Specified location, the longitudinal electrode 5 that conductive silver paste forms the 4th layer is republished after material solidification to be printed, and heat insulating lamina is located at horizontal stroke
Between electrode 3 and longitudinal electrode 5 so that breaking between them；The insulating protective film 6 of layer 5 printed using epoxy resin and
Into, select the material identical with heat insulating lamina 4, insulating protective film 6 by the sensing element printed before display 2, transverse electrode 3,
5 all standing of heat insulating lamina 4 and longitudinal electrode, plays insulation protection.
In the example, due to the deformation that test object is concrete structure, so the epoxide resin material of selection, elasticity
Modulus is closer to concrete.During printing, sensing element is printed on the thin plate 1 (shown in Fig. 2) of first layer successively and displays 2 (Fig. 3
It is shown), transverse electrode 3 (shown in Fig. 3), heat insulating lamina 4 (shown in Fig. 4), longitudinal electrode 5 (shown in Fig. 5) and insulating protective film 6
(shown in Fig. 6), every time printing will ensure that the material of last time printing carries out again after being fully cured.Treat that the insulation of layer 5 is protected
After cuticula 6 is fully cured, the sensing element for the test of concrete structure two dimensional plane strain field is just obtained.
Embodiment 2：As shown in Figure 1, a kind of matched two dimensional plane strain field test sensing element of modulus of the present invention, it
By sensing element display 2 and the transverse electrode 3 of the thin plate 1 of first layer, the second layer, the heat insulating lamina 4 of third layer, the 4th layer vertical
It is formed to the insulating protective film 6 of electrode 5 and layer 5.The object for the strain testing of being carried out is rock texture, selects springform
Thin plate 1 of the smaller epoxy resin board as first layer is measured, the thickness of thin plate 1 selects 0.2mm.The sensitivity member of the second layer
Part display 2, selecting epoxy resin, conductive carbon nanotube is configured to conducting polymer composite wood as filler as matrix
Material, is then printed on thin plate 1；It is before printing that 1 upper surface solvent scouring of thin plate is clean, ensure printing effect.The second layer
Transverse electrode 3 is equally printed onto using the printable conductive silver paste bought in the market on thin plate 1, sensing element display 2 and horizontal stroke
There is overlapping between electrode 3, ensure reliable electrical connection.The heat insulating lamina 4 of third layer selects epoxide resin material directly to print
Brush republishes the longitudinal electrode 5 that conductive silver paste forms the 4th layer, heat insulating lamina position after specified location, material solidification to be printed
Between transverse electrode 3 and longitudinal electrode 5 so that breaking between them；The insulating protective film 6 of layer 5 is printed using epoxy resin
It brushes, selects the material identical with heat insulating lamina 4, the sensing element printed before is displayed 2, laterally electricity by insulating protective film 6
5 all standing of pole 3, heat insulating lamina 4 and longitudinal electrode, plays insulation protection.
In the example, due to the deformation that test object is rock texture, so the epoxide resin material of selection, springform
Amount is closer to rock.During printing, sensing element is printed on the thin plate 1 (shown in Fig. 2) of first layer successively and displays 2 (Fig. 3 institutes
Show), transverse electrode 3 (shown in Fig. 3), 6 (Fig. 6 of heat insulating lamina 4 (shown in Fig. 4), longitudinal electrode 5 (shown in Fig. 5) and insulating protective film
It is shown), printing every time will ensure that the material of last time printing carries out again after being fully cured.Treat the insulating protective film of layer 5
After 6 are fully cured, the sensing element for the test of rock texture two dimensional plane strain field is just obtained.
Embodiment 3：As shown in Figure 1, a kind of matched two dimensional plane strain field test sensing element of modulus of the present invention, it
By sensing element display 2 and the transverse electrode 3 of the thin plate 1 of first layer, the second layer, the heat insulating lamina 4 of third layer, the 4th layer vertical
It is formed to the insulating protective film 6 of electrode 5 and layer 5.The object for the strain testing of being carried out is soil structures, selects springform
Thin plate 1 of the smaller silicon rubber thin plate as first layer is measured, the thickness of thin plate 1 selects 0.1mm.The sensing element of the second layer
Display 2, selecting silicon rubber, conductive black is configured to conductive polymer composite, Ran Houyin as filler as matrix
It brushes on thin plate 1；It is before printing that 1 upper surface solvent scouring of thin plate is clean, ensure printing effect.The transverse electrode 3 of the second layer
The conductive silver paste prepared using laboratory is equally printed onto on thin plate 1, and conductive silver paste is by silver powder particles and the compound preparation of silicon rubber
It forms, there is overlapping, the reliable electrical connection of guarantee between sensing element display 2 and transverse electrode 3.The heat insulating lamina 4 of third layer
Silastic material is selected to be directly printed on specified location, the conductive silver paste that preparation is republished after material solidification to be printed forms the
Four layers of longitudinal electrode 5, heat insulating lamina is between transverse electrode 3 and longitudinal electrode 5 so that breaking between them；Layer 5
Insulating protective film 6 printed using silicon rubber, select the material identical with heat insulating lamina 4, insulating protective film 6 will before print
The sensing element display 2 of brush, 5 all standing of transverse electrode 3, heat insulating lamina 4 and longitudinal electrode, play insulation protection.
In the example, due to the deformation that test object is soil structures, so the silastic material of selection, elasticity modulus
It is closer to the soil body.During printing, successively on the thin plate 1 (shown in Fig. 2) of first layer print sensing element display 2 (shown in Fig. 3),
Transverse electrode 3 (shown in Fig. 3), heat insulating lamina 4 (shown in Fig. 4), longitudinal electrode 5 (shown in Fig. 5) and (Fig. 6 institutes of insulating protective film 6
Show), printing every time will ensure that the material of last time printing carries out again after being fully cured.Treat the insulating protective film 6 of layer 5
After being fully cured, the sensing element for the test of soil structures two dimensional plane strain field is just obtained.
Claims (3)
1. a kind of matched two dimensional plane strain field test sensing element of modulus, it is characterized in that：The two dimensional plane strain field is tested
Sensing element have the first layer i.e. thin plate of bottom, the second layer sensing element display with transverse electrode, third layer heat insulating lamina,
4th layer of longitudinal electrode and the insulating protective film on layer 5, that is, upper strata, first layer, the second layer, third layer, the 4th layer and the 5th
Layer is linked in sequence；
Sensing element display matrix is a kind of resin or rubber material, is sufficiently mixed with conductive black or carbon nanotubes as conduction
Polymer composite；Electrode material matching adds in compound in rubber with the conductive silver paste sold in the market or by conductive silver powder
It forms；The insulating layer resin or rubber material identical with insulating protective film selection；It is once printed on ensureing when printing
Layer is printed again after being fully cured.
2. a kind of production method of the matched two dimensional plane strain field test sensing element of modulus described in claim 1, special
Sign is：The production method of sensing element first according to the elasticity modulus size of tested object, selects modulus more smaller
Thin plate, sensing element display matrix, electrode material, heat insulating lamina and insulation protection membrane material；Then conductive black or carbon are received
Mitron carries out mixed preparing conductive polymer composite with sensing element display matrix, and is printed on selected thin plate
Upper formation sensing element display layer；The electrode material chosen also is printed on bottom plate afterwards and forms transverse electrode, and is connected
Sensing element displays；Then heat insulating lamina is printed using selected heat insulating lamina material, republishes longitudinal electrode, heat insulating lamina
Between transverse electrode and longitudinal electrode, by two layers of electrode insulation；Finally, selected insulation protection membrane material is printed in
Top layer forms insulation protection film layer, plays a protective role.
3. the production method of the matched two dimensional plane strain field test sensing element of modulus according to claim 2, special
Sign is：The thin plate is a kind of plastics or rubber material, 0.1~0.3mm of thickness.
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| GB201704950D0 (en) * | 2017-03-28 | 2017-05-10 | Univ Manchester | Thin film material transfer method |
| CN109959358B (en) * | 2017-12-22 | 2020-10-23 | 深圳光启超材料技术有限公司 | Measuring film, method for manufacturing measuring film, and method for measuring plane strain field |
| CN109687063B (en) * | 2018-12-03 | 2020-05-15 | 南京邮电大学 | Preparation method of graphene-based flexible low-pass filter |
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