CN105115413A - Modulus matching two-dimensional plane strain field test sensing element and manufacturing method thereof - Google Patents
Modulus matching two-dimensional plane strain field test sensing element and manufacturing method thereof Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 238000007639 printing Methods 0.000 claims abstract description 27
- 238000009413 insulation Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 13
- 229920001971 elastomer Polymers 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 11
- 239000004033 plastic Substances 0.000 claims abstract description 8
- 229920003023 plastic Polymers 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 45
- 230000001681 protective effect Effects 0.000 claims description 31
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 14
- 239000011159 matrix material Substances 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 13
- 229920001940 conductive polymer Polymers 0.000 claims description 13
- 230000008878 coupling Effects 0.000 claims description 13
- 238000010168 coupling process Methods 0.000 claims description 13
- 239000007772 electrode material Substances 0.000 claims description 12
- 239000013536 elastomeric material Substances 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 239000002041 carbon nanotube Substances 0.000 claims description 9
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 9
- 238000003475 lamination Methods 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 239000003822 epoxy resin Substances 0.000 description 10
- 229920000647 polyepoxide Polymers 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 6
- 239000011435 rock Substances 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- 229920002379 silicone rubber Polymers 0.000 description 4
- 238000005056 compaction Methods 0.000 description 3
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- 229910001006 Constantan Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920000260 silastic Polymers 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 239000010720 hydraulic oil Substances 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
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- 229920013657 polymer matrix composite Polymers 0.000 description 1
- 239000011160 polymer matrix composite Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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Abstract
A modulus matching two-dimensional plane strain field test sensing element and the manufacturing method thereof relate to sensing elements and manufacturing method thereof. The modulus matching two-dimensional plane strain field test sensing element comprises a first thin plate layer, a second sensing element display and lateral electrode layer, a third insulating thin layer, a fourth vertical electrode layer and a fifth insulation and protection film layer, wherein the first thin plate layer is a plastic or rubber thin plate, the second sensing element display and lateral electrode layer is printed on the first thin plate layer through a printing means, the third insulating thin layer is printed with resin or rubber, the fourth vertical electrode layer is also formed through printing, and the fifth insulation and protection film layer is printed with resin or rubber. The sensing element can be used for better testing a two-dimensional plane strain field, and reaches synchronous strain with an object to be tested, the strain obtained through test is more accurate, and the strain test range is satisfactory. The test precision is improved. Since printing technology is employed in the method, the cost is low and the effect is good for mass production.
Description
Technical field
The present invention relates to a kind of sensing element and preparation method thereof, two dimensional plane strain field test sensing element of especially a kind of modulus coupling and preparation method thereof.
Background technology
Method at present for two dimensional plane strain field mainly contains contact measuring method and non-contact measurement method, wherein contact measuring method mainly utilizes the resistance strain plate of multiple spot to test, this method is layouted limited, strainometer size is larger, each strainometer will pick out p-wire in addition, occupy large quantity space, affect measuring accuracy; Representative in non-contact measurement method is digital image method, and this method can only be suitable under single shaft and transparent pressure room (hydraulic oil) condition, and measuring mechanism itself limits the range of application of this method.
The conventional, electric-resistance foil gauge adopted in contact measurement method, it is coiled into palisade (or corroding into palisade by very thin metal forming) by the constantan wire of Φ=0.02-0.05mm or nickel filament to be clipped in (substrate) in two-layer heat insulating lamella and to make, the sensitivity of this foil gauge is about 2, strain testing effective range is about 0.5%, is relative efficiency when testing for material strain change less (being less than 0.5%) that the elastic modulus such as rock, concrete, steel construction are larger.And for the less material of other modulus, as various plastics, rubber etc., the strain of these materials is general comparatively large, and the modulus of resistance strain gage is greater than these materials relatively, is difficult to guarantee to reach deform in same pace during test, so cannot complete strain testing.The novel large plastic strain measurement strainometer occurred in recent years adopts dead annealed constantan sensitive grid material and polyimide substrate material manufacture to form, there is good high ductibility, high elongation rate, strain testing effective range, about 10%, efficiently solves comparatively large sstrain test problem.But due to the restriction of this material in polyimide base, this strainometer compares the strain testing being suitable for larger modulus material, so just limits its usable range, cannot effectively to the strain testing of the materials such as less plastics, rubber and the soil body of modulus.
In view of above-mentioned two dimensional plane strain field measurement present situation, two dimensional plane strain field test sensing element of development modulus coupling and preparation method thereof, for the two dimensional plane strain field test of material various in engineering and laboratory experiment provides new test sensing element.
Summary of the invention
Technical matters: the object of the invention is two dimensional plane strain field test sensing element that a kind of highly sensitive, that strain range is large modulus will be provided to mate and preparation method thereof.
Technical scheme: the object of the present invention is achieved like this: this two dimensional plane strain field test sensing element has sensitive element display and transverse electrode, the heat insulating lamina of third layer, the longitudinal electrode of the 4th layer and the insulating protective film on layer 5 and upper strata of the thin plate of ground floor and bottom, the second layer, ground floor, the second layer, third layer, the 4th layer and layer 5 are linked in sequence.
The method for making of sensing element, first according to the elastic modulus size of tested object, the thin plate selecting modulus more smaller, sensitive element display matrix, electrode material, heat insulating lamina and insulation protection membrane material; Then conductive black or carbon nano-tube and sensitive element are displayed matrix and carry out mixed preparing conductive polymer composite, and be printed on the thin plate that chooses and form sensitive element display layer; Afterwards the electrode material chosen also is printed on base plate and forms transverse electrode, and connect upper sensitive element display; Then utilize the heat insulating lamina material chosen to print heat insulating lamina, republish longitudinal electrode, heat insulating lamina is between transverse electrode and longitudinal electrode, by two-layer electrode insulation; Finally, the insulating protective film print material chosen is formed insulation protection rete in the superiors, plays a protective role.
Described thin plate is a kind of plastics or elastomeric material, thickness 0.1 ~ 0.3mm; Sensitive element display matrix is a kind of resin or elastomeric material, is fully mixed into conductive polymer composite with conductive black or carbon nano-tube; The conductive silver paste that electrode material coupling market is sold or added in rubber by conductive silver powder is composited; Insulation course and insulating protective film select identical resin or elastomeric material; To ensure that once printed layers is printed after solidifying completely again when printing.
Beneficial effect, owing to have employed such scheme, the thin plate of ground floor (orlop) adopts plastic plate or rubber slab, then the conductive polymer composite of carbon black or carbon nano-tube potting resin or rubber-based is printed on thin plate, form sensitive element display after cured, then be printed on thin plate by electrode material, printing position and sensitive element display certain overlapping, ensure that conduction connects, form transverse electrode layer.Afterwards resin or elastomeric material printing are formed heat insulating lamina, republish electrode material and form longitudinal electrode, the object of heat insulating lamina ensures to insulate between transverse electrode and longitudinal electrode, forms open circuit.Finally resin or elastomeric material are printed in layer 5 (the superiors), cover the sensitive element display and electrode that are positioned at below, play the effect of insulation protection.Thin plate, sensitive element display matrix, electrode material, heat insulating lamina and insulation protection membrane material are selected according to the elastic modulus size of measurand; accomplish that elastic modulus and the measurand of all material selected are close; be conducive to sensing element can being driven to strain together when measurand produces strain; reach synchronous strain, ensure the accuracy of test.Sensitive element display has strain sensitivity, its resistance value generation respective change when there is strain, tests relevant position strain size.Transverse electrode and longitudinal electrode mainly play the effect that connecting test equipment and sensitive element display, and are resistance test data lines.The insulating protective film of the superiors is insulation and waterproofing protection effect, avoids sensitive element display and electrode to be exposed in environment and is interfered, affect measuring accuracy.
The two dimensional plane strain field test sensing element made, can realize the two dimensional plane strain field test of various material, major advantage has:
1, structure is simple, and make simple, adopt typography, can be mass, cost is low.
2, select each ingredient material of sensing element according to the elastic modulus of tested object, deform in same pace when testing can be ensured, ensure that measuring accuracy and strain testing range.
3, the sensitive element that conductive polymer composite is made displays, and makes sensing element have high sensitivity, strain the features such as range is large.
Accompanying drawing illustrates:
Fig. 1 is the schematic diagram of the two dimensional plane strain field test sensing element of a kind of modulus coupling of the present invention.
Fig. 2 is ground floor thin plate figure of the present invention.
Fig. 3 is second layer sensitive element array of the present invention and transverse electrode figure.
Fig. 4 is 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 layer 5 insulating protective film figure of the present invention.
In figure, 1, thin plate; 2, sensitive element display; 3, transverse electrode; 4, heat insulating lamina; 5, longitudinal electrode; 6, insulating protective film.
Embodiment:
Below in conjunction with accompanying drawing, embodiments of the invention are further described:
This two dimensional plane strain field test sensing element has sensitive element display and transverse electrode, the heat insulating lamina of third layer, the longitudinal electrode of the 4th layer and the insulating protective film on layer 5 and upper strata of the thin plate of ground floor and bottom, the second layer, and ground floor, the second layer, third layer, the 4th layer and layer 5 are linked in sequence.
The method for making of sensing element, first according to the elastic modulus size of tested object, the thin plate selecting modulus more smaller, sensitive element display matrix, electrode material, heat insulating lamina and insulation protection membrane material; Then conductive black or carbon nano-tube and sensitive element are displayed matrix and carry out mixed preparing conductive polymer composite, and be printed on the thin plate that chooses and form sensitive element display layer; Afterwards the electrode material chosen also is printed on base plate and forms transverse electrode, and connect upper sensitive element display; Then utilize the heat insulating lamina material chosen to print heat insulating lamina, republish longitudinal electrode, heat insulating lamina is between transverse electrode and longitudinal electrode, by two-layer electrode insulation; Finally, the insulating protective film print material chosen is formed insulation protection rete in the superiors, plays a protective role.
Described thin plate is a kind of plastics or elastomeric material, thickness 0.1 ~ 0.3mm; Sensitive element display matrix is a kind of resin or elastomeric material, is fully mixed into conductive polymer composite with conductive black or carbon nano-tube; The conductive silver paste that electrode material coupling market is sold or added in rubber by conductive silver powder is composited; Insulation course and insulating protective film select identical resin or elastomeric material; To ensure that once printed layers is printed after solidifying completely again when printing.
The material that the material of the material of thin plate 1, the matrix material of sensitive element display 2, transverse electrode 3 and longitudinal electrode 5, heat insulating lamina 4 correspondingly need select modulus smaller according to the elastic modulus of measurand with the material of insulating protective film 6.
Sensitive element display 2 adopts conductive polymer composite printing to form.
Conductive polymer composite is conductive black or carbon nano-tube filled rubber-based or polymer matrix composites.
Embodiment 1: as shown in Figure 1; the two dimensional plane strain field test sensing element of a kind of modulus coupling of the present invention, it displays 2 by the thin plate 1 of ground floor, the sensitive element of the second layer and forms with transverse electrode 3, the heat insulating lamina 4 of third layer, the longitudinal electrode 5 of the 4th layer and the insulating protective film 6 of layer 5.The object carrying out strain testing is xoncrete structure, and the epoxy resin board selecting elastic modulus smaller is as the thin plate 1 of ground floor, and the thickness of thin plate 1 selects 0.3mm.The sensitive element display 2 of the second layer, select epoxy resin as matrix, conductive black, as compaction material, is mixed with conductive polymer composite, is then printed on thin plate 1; Before printing, thin plate 1 upper surface is clean with solvent scouring, ensure printing effect.The transverse electrode 3 of the second layer uses the printable conductive silver paste that market is bought to be printed onto on thin plate 1 equally, sensitive element display 2 with have between transverse electrode 3 overlapping, ensure be electrically connected reliably.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 cured to be printed, heat insulating lamina, between transverse electrode 3 and longitudinal electrode 5, makes open circuit between them; The insulating protective film 6 of layer 5 adopts epoxy resin printing to form; select the material identical with heat insulating lamina 4; insulating protective film 6 by print before sensitive element display 2, transverse electrode 3, heat insulating lamina 4 and longitudinal electrode 5 all standing, play insulation protection effect.
In this example, because tested object is the distortion of xoncrete structure, thus select epoxide resin material, its elastic modulus and concrete more close.During printing; successively at thin plate 1 (shown in Fig. 2) above printing sensitive element display 2 (shown in Fig. 3), transverse electrode 3 (shown in Fig. 3), heat insulating lamina 4 (Fig. 4 is shown), longitudinal electrode 5 (shown in Fig. 5) and the insulating protective film 6 (shown in Fig. 6) of ground floor, each printing will ensure that the material printed last time carries out after having solidified completely again.After the insulating protective film 6 of layer 5 solidifies completely, just obtain the sensing element for the test of xoncrete structure two dimensional plane strain field.
Embodiment 2: as shown in Figure 1; the two dimensional plane strain field test sensing element of a kind of modulus coupling of the present invention, it displays 2 by the thin plate 1 of ground floor, the sensitive element of the second layer and forms with transverse electrode 3, the heat insulating lamina 4 of third layer, the longitudinal electrode 5 of the 4th layer and the insulating protective film 6 of layer 5.The object carrying out strain testing is rock texture, and the epoxy resin board selecting elastic modulus smaller is as the thin plate 1 of ground floor, and the thickness of thin plate 1 selects 0.2mm.The sensitive element display 2 of the second layer, select epoxy resin as matrix, conductive carbon nanotube, as compaction material, is mixed with conductive polymer composite, is then printed on thin plate 1; Before printing, thin plate 1 upper surface is clean with solvent scouring, ensure printing effect.The transverse electrode 3 of the second layer uses the printable conductive silver paste that market is bought to be printed onto on thin plate 1 equally, sensitive element display 2 with have between transverse electrode 3 overlapping, ensure be electrically connected reliably.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 cured to be printed, heat insulating lamina, between transverse electrode 3 and longitudinal electrode 5, makes open circuit between them; The insulating protective film 6 of layer 5 adopts epoxy resin printing to form; select the material identical with heat insulating lamina 4; insulating protective film 6 by print before sensitive element display 2, transverse electrode 3, heat insulating lamina 4 and longitudinal electrode 5 all standing, play insulation protection effect.
In this example, because tested object is the distortion of rock texture, thus select epoxide resin material, its elastic modulus and rock more close.During printing; successively at thin plate 1 (shown in Fig. 2) above printing sensitive element display 2 (shown in Fig. 3), transverse electrode 3 (shown in Fig. 3), heat insulating lamina 4 (Fig. 4 is shown), longitudinal electrode 5 (shown in Fig. 5) and the insulating protective film 6 (shown in Fig. 6) of ground floor, each printing will ensure that the material printed last time carries out after having solidified completely again.After the insulating protective film 6 of layer 5 solidifies completely, just obtain the sensing element for the test of rock texture two dimensional plane strain field.
Embodiment 3: as shown in Figure 1; the two dimensional plane strain field test sensing element of a kind of modulus coupling of the present invention, it displays 2 by the thin plate 1 of ground floor, the sensitive element of the second layer and forms with transverse electrode 3, the heat insulating lamina 4 of third layer, the longitudinal electrode 5 of the 4th layer and the insulating protective film 6 of layer 5.The object carrying out strain testing is soil structures, and the silicon rubber thin plate selecting elastic modulus smaller is as the thin plate 1 of ground floor, and the thickness of thin plate 1 selects 0.1mm.The sensitive element display 2 of the second layer, select silicon rubber as matrix, conductive black, as compaction material, is mixed with conductive polymer composite, is then printed on thin plate 1; Before printing, thin plate 1 upper surface is clean with solvent scouring, ensure printing effect.The conductive silver paste that the transverse electrode 3 of the second layer uses laboratory to prepare is printed onto on thin plate 1 equally, conductive silver paste by silver powder particles and silicon rubber compound formulated, sensitive element display 2 with have between transverse electrode 3 overlapping, ensure be electrically connected reliably.The heat insulating lamina 4 of third layer selects silastic material to be directly printed on specified location, the conductive silver paste republishing preparation after material cured to be printed forms the longitudinal electrode 5 of the 4th layer, heat insulating lamina, between transverse electrode 3 and longitudinal electrode 5, makes open circuit between them; The insulating protective film 6 of layer 5 adopts silicon rubber printing to form, and selects the material identical with heat insulating lamina 4, insulating protective film 6 by print before sensitive element display 2, transverse electrode 3, heat insulating lamina 4 and longitudinal electrode 5 all standing, play insulation protection effect.
In this example, because tested object is the distortion of soil structures, thus select silastic material, its elastic modulus and the soil body more close.During printing; successively at thin plate 1 (shown in Fig. 2) above printing sensitive element display 2 (shown in Fig. 3), transverse electrode 3 (shown in Fig. 3), heat insulating lamina 4 (Fig. 4 is shown), longitudinal electrode 5 (shown in Fig. 5) and the insulating protective film 6 (shown in Fig. 6) of ground floor, each printing will ensure that the material printed last time carries out after having solidified completely again.After the insulating protective film 6 of layer 5 solidifies completely, just obtain the sensing element for the test of soil structures two dimensional plane strain field.
Claims (3)
1. the two dimensional plane strain field test sensing element of a modulus coupling; it is characterized in that: this two dimensional plane strain field test sensing element has sensitive element display and transverse electrode, the heat insulating lamina of third layer, the longitudinal electrode of the 4th layer and the insulating protective film on layer 5 and upper strata of the thin plate of ground floor and bottom, the second layer, ground floor, the second layer, third layer, the 4th layer and layer 5 are linked in sequence.
2. the method for making of the two dimensional plane strain field test sensing element of a modulus coupling according to claim 1, it is characterized in that: the method for making of sensing element, first according to the elastic modulus size of tested object, the thin plate selecting modulus more smaller, sensitive element display matrix, electrode material, heat insulating lamina and insulation protection membrane material; Then conductive black or carbon nano-tube and sensitive element are displayed matrix and carry out mixed preparing conductive polymer composite, and be printed on the thin plate that chooses and form sensitive element display layer; Afterwards the electrode material chosen also is printed on base plate and forms transverse electrode, and connect upper sensitive element display; Then utilize the heat insulating lamina material chosen to print heat insulating lamina, republish longitudinal electrode, heat insulating lamina is between transverse electrode and longitudinal electrode, by two-layer electrode insulation; Finally, the insulating protective film print material chosen is formed insulation protection rete in the superiors, plays a protective role.
3. the method for making of the two dimensional plane strain field test sensing element of modulus coupling according to claim 2, is characterized in that: described thin plate is a kind of plastics or elastomeric material, thickness 0.1 ~ 0.3mm; Sensitive element display matrix is a kind of resin or elastomeric material, is fully mixed into conductive polymer composite with conductive black or carbon nano-tube; The conductive silver paste that electrode material coupling market is sold or added in rubber by conductive silver powder is composited; Insulation course and insulating protective film select identical resin or elastomeric material; To ensure that once printed layers is printed after solidifying completely again when printing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109687063A (en) * | 2018-12-03 | 2019-04-26 | 南京邮电大学 | A kind of preparation method of graphene-based flexible low-pass filter |
| CN109959358A (en) * | 2017-12-22 | 2019-07-02 | 深圳光启超材料技术有限公司 | Manufacturing method, the plane strain field measurement method for measuring film, measuring film |
| CN110461764A (en) * | 2017-03-28 | 2019-11-15 | 曼彻斯特大学 | Thin-film material transfer method |
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| CN105115413B (en) | 2018-06-05 |
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