CN109883314A - A kind of fexible film sensing element sensibility testing arrangement and its method - Google Patents
A kind of fexible film sensing element sensibility testing arrangement and its method Download PDFInfo
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- CN109883314A CN109883314A CN201910175817.5A CN201910175817A CN109883314A CN 109883314 A CN109883314 A CN 109883314A CN 201910175817 A CN201910175817 A CN 201910175817A CN 109883314 A CN109883314 A CN 109883314A
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- film sensing
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Abstract
The invention discloses a kind of fexible film sensing element sensibility testing arrangement and its method, the fexible film sensing element sensibility testing arrangement includes: bottom plate, a pair of of the translation component being arranged on the bottom plate, the aluminium flake and multimeter being clamped between the pair of translation component；The pair of translation component can mutually be drawn close so that the aluminium flake is bent, and for attaching the fexible film sensing element, the multimeter connect with the fexible film sensing element and is used to measure the resistance value of the fexible film sensing element aluminium flake.Since using a pair of translation component compression aluminium flake, so that the fexible film sensing element on aluminium flake is bent therewith, the variation of resistance value of the detection fexible film sensing element in bending calculates the sensitivity of fexible film sensing element.Sensibility testing arrangement of the invention, structure is simple, and measurement request is low, and measurement is convenient, and at low cost.
Description
Technical field
The present invention relates to sensitivity measure technical fields more particularly to a kind of fexible film sensing element sensitivity to survey
Try devices and methods therefor.
Background technique
Flexible strain sensor, the composite conductive layers mostly in some flexible polymer substrates, passes through perception
Extraneous ess-strain, so that the resistance of the conductive layer in polymeric substrates be made to change.In the prior art, traditional flexibility
The sensitivity coefficient characterizing method of strain sensor, equipment requirement is high, expensive, is unfavorable for generality use.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, providing a kind of fexible film biography
Sensing unit sensibility testing arrangement and its method, it is intended to solve sensitivity coefficient characterization equipment requirement height in the prior art, price
Expensive problem.
The technical proposal for solving the technical problem of the invention is as follows:
A kind of fexible film sensing element sensibility testing arrangement, wherein include: bottom plate, be arranged on the bottom plate
A pair of translation component, the aluminium flake and multimeter being clamped between the pair of translation component；The pair of translation component can phase
Mutually draw close so that the aluminium flake is bent, the aluminium flake for attaching the fexible film sensing element, the multimeter with it is described
Fexible film sensing element connects and is used to measure the resistance value of the fexible film sensing element.
The fexible film sensing element sensibility testing arrangement, wherein the translation component includes: to be arranged at the bottom
Stepper motor and pedestal on plate, the sliding shoe being slidably connected with the pedestal and the clamping group being arranged on the sliding shoe
Part；The shaft of the stepper motor is connect with the sliding shoe using screw thread pair；The clamp assemblies include: to be arranged in the cunning
The intermediate plate of motion block upper surface and the limit film that the sliding shoe side is set；The limit film be located at the sliding shoe with it is another
The translation component opposite side
The fexible film sensing element sensibility testing arrangement, wherein the limit film includes: resin flake and sets
The array of protrusions on the resin flake is set, the array of protrusions is described convex for limiting the downward freedom degree of the aluminium flake
The protrusion risen in array is hemispherical.
The fexible film sensing element sensibility testing arrangement, wherein adjacent two rows of protrusions in the array of protrusions
Distance is adapted to the thickness of the aluminium flake.
The fexible film sensing element sensibility testing arrangement, wherein the intermediate plate is along the sliding side of the sliding shoe
To protruding from the sliding shoe, and for limiting the upward freedom degree of the aluminium flake.
The fexible film sensing element sensibility testing arrangement, wherein the intermediate plate is along the sliding side of the sliding shoe
Several screw holes are set up, the intermediate plate is connect by screw with the sliding shoe.
The fexible film sensing element sensibility testing arrangement, wherein the length of the aluminium flake is 60mm~70mm, wide
Degree is 40mm~45mm.
The fexible film sensing element sensibility testing arrangement, wherein the center of the fexible film sensing element with
The center of the aluminium flake is overlapped, and the long side of the fexible film sensing element is parallel with the long side of the aluminium flake, the flexible thin
The broadside of film sensing element is parallel with the broadside of the aluminium flake.
The fexible film sensing element sensibility testing arrangement, wherein the sensitivity of the fexible film sensing element
It is calculated using following formula:
Wherein, GF indicates the sensitivity of fexible film sensing element, R0Indicate that fexible film sensing element is in flat state
When resistance value, Δ R indicate fexible film sensing element be in bending state when increased resistance value, Δ ε indicate strain variation value,
H indicates that the thickness of fexible film sensing element, r indicate radius of curvature when fexible film sensing element is in bending state.
A kind of test method based on the fexible film sensing element sensibility testing arrangement as described in above-mentioned any one,
In comprising following steps:
Fexible film sensing element is attached on aluminium flake, and by aluminium flake with flat state be clamped in a pair of of translation component it
Between, measure resistance value when fexible film sensing element flat state；
Control translation component is mutually drawn close so that aluminium flake bending, measures the electricity when bending state of fexible film sensing element
Resistance value；
When the bending state of resistance value and fexible film sensing element when by fexible film sensing element flat state
Resistance value calculate fexible film sensing element sensitivity.
The utility model has the advantages that due to using a pair of of translation component compression aluminium flake so that the fexible film sensing element on aluminium flake with
Bending, detection fexible film sensing element bending when resistance value variation calculate fexible film sensing element it is sensitive
Degree.Sensibility testing arrangement of the invention, structure is simple, and measurement request is low, and measurement is convenient, and at low cost.
Detailed description of the invention
Fig. 1 is the first structure diagram of fexible film sensing element sensibility testing arrangement in the present invention.
Fig. 2 is the structural schematic diagram of insole board of the present invention and translation component.
Fig. 3 is the second structural schematic diagram of fexible film sensing element sensibility testing arrangement in the present invention.
Fig. 4 is the structural schematic diagram of intermediate plate in the present invention.
Fig. 5 is the first structure diagram of limit plate in the present invention.
Fig. 6 is the second structural schematic diagram of limit plate in the present invention.
Fig. 7 is the scheme of installation of aluminium flake in the present invention.
Fig. 8 is the schematic diagram of medium sensitivity calculation formula of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer and more explicit, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
Please refer to Fig. 1-Fig. 7, the present invention provides the one of a kind of fexible film sensing element sensibility testing arrangement
A little embodiments.
As shown in Figure 1 and Figure 7, a kind of fexible film sensing element sensibility testing arrangement of the invention, comprising: bottom plate
10, a pair of of translation component 20 for being arranged on the bottom plate 10, the aluminium flake 30 being clamped between the pair of translation component 20 with
And multimeter 40；The pair of translation component 20 can mutually be drawn close so that the aluminium flake 30 is bent, and the aluminium flake 30 is for attaching
The fexible film sensing element 80, the multimeter 40 connect with the fexible film sensing element 80 and are used to measure described
The resistance value of fexible film sensing element 80.
Fexible film sensing element sensibility testing arrangement of the invention carries out sensitivity measure using following steps:
Step S100, fexible film sensing element 80 is attached on aluminium flake 30, and aluminium flake 30 is clamped with flat state
Between a pair of translation component 20, resistance value when 80 flat state of fexible film sensing element is measured.
Step S200, control translation component 20 is mutually drawn close so that the bending of aluminium flake 30, measures fexible film sensing element 80
Bending state when resistance value.
Step S300, resistance value and fexible film sensing element 80 when by fexible film 80 flat state of sensing element
Bending state when resistance value calculate fexible film sensing element 80 sensitivity.
It is worth noting that due to compressing aluminium flake 30 using a pair of of translation component 20 so that fexible film on aluminium flake 30
Sensing element 80 is bent therewith, and the variation of resistance value of the detection fexible film sensing element 80 in bending calculates fexible film and passes
The sensitivity of sensing unit 80.Sensibility testing arrangement of the invention, structure is simple, and measurement request is low, and measurement is convenient, and cost
It is low.
Specifically, the sensitivity of the fexible film sensing element 80 is calculated using following formula:
Wherein, GF indicates the sensitivity of fexible film sensing element 80, R0Indicate that fexible film sensing element 80 is in plane
Resistance value when state, Δ R indicates increased resistance value when fexible film sensing element 80 is in bending state, specially current soft
The resistance value of property diaphragm sensing element 80 subtracts R0, Δ ε indicates strain variation value, and strain variation value here can be compression
The changing value of strain or elongation strain, specifically, as shown in fig. 7, fexible film sensing element 80 can be set in aluminium flake 30
Inner or outer side；At inside, fexible film sensing element 80 is in compression strain；When on the outside, fexible film sensing element 80
In elongation strain.H indicates the thickness of fexible film sensing element 80, when r indicates that fexible film sensing element 80 is in bending state
Radius of curvature.
Below by taking fexible film sensing element 80 is located at 30 inside of aluminium flake as an example, illustrate Calculation of Sensitivity principle:
As shown in figure 8, original length of the fexible film sensing element 80 when deformation occurs for original state (deforms
When be arc length) be L, that is to say, that fexible film sensing element 80 be bent after formed ring fan outer arc length be also L, here
Outer arc is connected on the inside of aluminium flake 30, and the general thickness of ring fan is H, sets the step number and speed parameter of stepper motor 21,
Each pulse signal of stepper motor 21 corresponds to set displacement.When two electricity driving displacement platforms move toward one another, i.e. fexible film
When by bending deformation, if its bending radius is r, corresponding chord length is c, and central angle θ and fexible film lower edge are in
Property layer with a thickness of z.Wherein, from the foregoing it will be appreciated that c can be acquired by initial distance displacement corresponding with single pulse.According to Fig.8,
Geometry, the relationship of each parameter indicates can be for shown in formula (1) and (2).
θ r=L (1)
When whole positive bending, fexible film sensing element compression stress under compression, bending radius r1When the corresponding center of circle
Angle is θ1, and under original state it is respectively r0And θ0.Strain stress such as following formula (3) of entire fexible film sensing element as a result,
In the process, θ1·r1≈θ0·r0, r1> > z, and in the initial state, i.e., fexible film is in flattened state,
When deformation occurs, r0→ ∞, formula (3) can simplify are as follows:
For fexible film, neutral line has z=H/2, as a result, in conjunction with initial flexibility in the middle of total
Each pulse signal corresponds to set position with stepper motor 21 for the distance between film two sides (i.e. the length of fexible film)
It moves, derives that its compression strain can indicate are as follows:
Similarly, when fexible film sensing element 80 is located at 30 outside of aluminium flake, back-flexing, fexible film sensing element occurs
When part is stretched stress, similar with upper derivation, therefore, elongation strain can be indicated are as follows:
Therefore, it after the strain variation rule for determining fexible film sensing element, is recorded in real time in conjunction with digital multimeter
Resistance value, Sensitirity va1ue of the fexible film sensing element in a certain range of strain can be acquired using formula (7).
Certainly, for the ease of control translation component and preservation test data, fexible film sensing element sensitivity test dress
It sets further include: controller 50, computer 60 and Isolating Platform 70.Bottom plate 10, controller 50, computer 60, multimeter 40 be respectively positioned on every
It shakes on platform 70.
In a preferred embodiment of the present invention, as shown in Fig. 2-Fig. 3, the translation component 20 includes: stepper motor
21, pedestal 22, sliding shoe 23 and clamp assemblies；Stepper motor 21 and pedestal 22 are arranged on bottom plate, and clamp assemblies setting exists
On sliding shoe 23, sliding shoe 23 is slidably connected with pedestal 22, and sliding shoe 23 is connect with stepper motor 21 using screw thread pair；It is described
Clamp assemblies include: the intermediate plate 241 that 23 upper surface of sliding shoe is arranged in and limit that 23 side of sliding shoe is arranged in
Piece 242；The limit film 242 is located at the sliding shoe 23 and another translation component opposite side.
Specifically, two translation components 20 are symmetrical arranged, that is to say, that two stepper motors 21 are also symmetrically arranged.Folder
It holds component to be arranged on sliding shoe 23, the moving direction of the sliding shoe 23 of two translation components 20 is opposite, clamp assemblies
It is oppositely arranged.Two clamp assemblies clamp the both ends of aluminium flake 30 respectively.Certainly it can also can be bent using other here
Plate replace aluminium flake 30.
Screw thread pair includes: and the shaft connection wire rod 27 of stepper motor 21 and the nut being threadedly coupled with the screw rod 27
(not shown), nut are fixedly connected with sliding shoe 23；More specifically, nut is arranged in 23 middle position of sliding shoe, also
It is to say, screw rod 27 is located at 23 middle position of sliding shoe.Sliding shoe 23 is slidably connected by slide bar 28 with pedestal 22, and slide bar 28 has two
It is a, it is located at 23 two sides of sliding shoe；Sliding shoe 23 is set on slide bar 28.It can be with limit slippage block 23 by two sides slide bar 28
It overturns in the horizontal plane, sliding shoe 23 is smoothly slided, fexible film sensing element smoothly deforms, to improve
The accuracy of measurement.
One end of the shaft of stepper motor 21 is connect by shaft coupling 26 with screw rod 27, and shaft coupling 26 can be to avoid sliding shoe
23 transition sliding damage translation component.The other end of the shaft of stepper motor 21 is provided with knob 211, by twisting knob 211
Can manual rotary screw rod 27, and make sliding shoe 23 slide.
In a preferred embodiment of the present invention, as shown in Figure 4-Figure 6, the limit film 242 includes: resin flake
2421 and the array of protrusions 2422 that is arranged on the resin flake 2421, the array of protrusions 2422 is for limiting the aluminium
The downward freedom degree of piece 30, the protrusion in the array of protrusions 2422 are hemispherical.
Specifically, limit film 242 can be located above or below intermediate plate 241, this is needed according to fexible film sensing element
80 measurement request of part determines, needs to measure the sensitivity that fexible film sensing element 80 is bent upwards in the present embodiment, limits
Piece 242 is located at the lower section of intermediate plate 241.The intermediate plate 241 is to the center of the pair of translation component 20 (i.e. along the sliding shoe
Glide direction) above-mentioned translation component 20 is protruded from, and for limiting the upward freedom degree of the aluminium flake 30, that is to say, that intermediate plate
The upper surface of 241 clamping aluminium flakes 30, the lower surface of protrusion clamping aluminium flake 30, thus intermediate plate 241 is located at the top of limit film 242.
In a preferred embodiment of the present invention, as shown in Fig. 5-Fig. 6, adjacent two rows are convex in the array of protrusions 2422
The distance risen is adapted to the thickness of the aluminium flake 30.Certainly, in order to meet clamping demand, the thickness of aluminium flake 30 is certainly less than adjacent
The spacing of two rows of protrusions, such aluminium flake 30 can be just put between adjacent two rows of protrusions, and protrusion can just play position-limiting action.
Specifically, radius R is 0.5mm, at a distance of L between hemisphere and hemisphere2=2mm, hemisphere and border L1=1mm.Aluminium
Piece 30 with a thickness of 1mm namely L2- 2 × R=2-2 × 0.5mm=1mm, that is to say, that aluminium flake 30 is just caught in adjacent two rows
In protrusion.
In a preferred embodiment of the present invention, as shown in Figure 3 and Figure 4, in order to adjust the length that intermediate plate 241 protrudes,
The intermediate plate 241 is provided with several screw holes along the translation direction of the sliding shoe 23, the intermediate plate 241 by screw with
The sliding shoe 23 connects.
Specifically, when screw is fixed in different screw holes, the length that intermediate plate 241 protrudes is different, by adjusting
The length that intermediate plate 241 protrudes, to meet different size of aluminium flake 30, different size of fexible film sensing element in other words.
The material of intermediate plate 241 can be spheroidal graphite cast-iron, and manganese steel, stainless steel, brass is bronze, copper-nickel alloy, at least one in duralumin
Kind.The width of intermediate plate 241 is of same size with sliding shoe 23, length 26mm, with a thickness of 1~3mm.Along 23 side of movement of sliding shoe
To at a distance of 5mm between adjacent screw hole, that is, intermediate plate 241 protrudes the minimum of length can increase or decrease 5mm.
The length of resin flake 2421 and the of same size of sliding shoe 23 are 41mm, the vertical height of width and sliding block 23
It is mutually all 17mm, with a thickness of 2~3mm.
In a preferred embodiment of the present invention, the length of the aluminium flake 30 be 60mm~70mm, width be 40mm~
45mm.The center of the fexible film sensing element 80 is overlapped with the center of the aluminium flake 30, the fexible film sensing element
80 long side is parallel with the long side of the aluminium flake 30, the broadside of the broadside of the fexible film sensing element 80 and the aluminium flake 30
It is parallel
The present invention also provides one kind to be surveyed based on 80 sensitivity of fexible film sensing element described in above-mentioned any one embodiment
The preferred embodiment for the test side that trial assembly is set:
A kind of 80 sensitivity test method of fexible film sensing element described in the embodiment of the present invention, comprising the following steps:
Step S100, fexible film sensing element 80 is attached on aluminium flake 30, and aluminium flake 30 is clamped with flat state
Between a pair of translation component 20, resistance value when 80 flat state of fexible film sensing element is measured, as detailed above.
Step S200, control translation component 20 is mutually drawn close so that the bending of aluminium flake 30, measures fexible film sensing element 80
Bending state when resistance value, as detailed above.
Specifically, in the actual operation process, aluminium flake may be bent upwards and may also be bent downwardly in bending, therefore such as
When sense film element is attached at aluminium flake upper surface by fruit, when aluminium flake is bent upwards, i.e., when upward convex, thin-film component is drawn
Stretching strain.If aluminium flake is bent downwardly, thin-film component is happens is that compression strain.Therefore, in actual operation, when aluminium flake
After being embedded between translation component, before starting stepper motor 21, by the knob 211 of 21 rear side of fine steps motor come micro-
It adjusts, it is made to have one to be bent upwards or reclinate trend, restart stepper motor 21, control translation 20 phase of component later
It mutually draws close so that aluminium flake 30 is bent.
Step S300, resistance value and fexible film sensing element 80 when by fexible film 80 flat state of sensing element
Bending state when resistance value calculate fexible film sensing element 80 sensitivity, as detailed above.
In conclusion a kind of fexible film sensing element sensibility testing arrangement provided by the present invention and its method, institute
Stating fexible film sensing element sensibility testing arrangement includes: bottom plate, a pair of of the translation component being arranged on the bottom plate, clamping
Aluminium flake and multimeter between the pair of translation component；The pair of translation component can mutually be drawn close so that the aluminium flake
Bending, the aluminium flake connect for attaching the fexible film sensing element, the multimeter and the fexible film sensing element
Connect and be used to measure the resistance value of the fexible film sensing element.Due to compressing aluminium flake so that aluminium using a pair of of translation component
The fexible film sensing element of on piece is bent therewith, and the variation of resistance value of the detection fexible film sensing element in bending calculates
The sensitivity of fexible film sensing element.Sensibility testing arrangement of the invention, structure is simple, and measurement request is low, and measurement is convenient,
And it is at low cost.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. a kind of fexible film sensing element sensibility testing arrangement characterized by comprising bottom plate is arranged in the bottom plate
On a pair of of translation component, the aluminium flake and multimeter that are clamped between the pair of translation component；The pair of translation component
Can mutually draw close so that the aluminium flake is bent, the aluminium flake for attaching the fexible film sensing element, the multimeter with
The fexible film sensing element connects and is used to measure the resistance value of the fexible film sensing element.
2. fexible film sensing element sensibility testing arrangement according to claim 1, which is characterized in that the translation component
It include: the stepper motor and pedestal being arranged on the bottom plate, the sliding shoe being slidably connected with the pedestal and setting are in institute
State the clamp assemblies on sliding shoe；The shaft of the stepper motor is connect with the sliding shoe using screw thread pair；The clamping group
Part includes: the intermediate plate that the sliding shoe upper surface is arranged in and limit film that the sliding shoe side is arranged in；The limit film
Positioned at the sliding shoe and another translation component opposite side.
3. fexible film sensing element sensibility testing arrangement according to claim 2, which is characterized in that the limit film packet
Include: resin flake and the array of protrusions being arranged on the resin flake, the array of protrusions for limit the aluminium flake to
Under freedom degree, the protrusion in the array of protrusions is hemispherical.
4. fexible film sensing element sensibility testing arrangement according to claim 3, which is characterized in that the array of protrusions
In the distances of adjacent two rows of protrusions be adapted to the thickness of the aluminium flake.
5. fexible film sensing element sensibility testing arrangement according to claim 2, which is characterized in that the intermediate plate is along institute
The glide direction for stating sliding shoe protrudes from the sliding shoe, and for limiting the upward freedom degree of the aluminium flake.
6. fexible film sensing element sensibility testing arrangement according to claim 5, which is characterized in that the intermediate plate is along institute
It states and is provided with several screw holes in the glide direction of sliding shoe, the intermediate plate is connect by screw with the sliding shoe.
7. fexible film sensing element sensibility testing arrangement according to claim 1, which is characterized in that the length of the aluminium flake
Degree is 60mm~70mm, and width is 40mm~45mm.
8. fexible film sensing element sensibility testing arrangement according to claim 1, which is characterized in that the fexible film
The center of sensing element is overlapped with the center of the aluminium flake, the long side of the fexible film sensing element and the long side of the aluminium flake
In parallel, the broadside of the fexible film sensing element is parallel with the broadside of the aluminium flake.
9. fexible film sensing element sensibility testing arrangement according to claim 1, which is characterized in that the fexible film
The sensitivity of sensing element is calculated using following formula:
Wherein, GF indicates the sensitivity of fexible film sensing element, R0Indicate electricity when fexible film sensing element is in flat state
Resistance value, Δ R indicate that increased resistance value when fexible film sensing element is in bending state, Δ ε indicate strain variation value, and H is indicated
The thickness of fexible film sensing element, r indicate radius of curvature when fexible film sensing element is in bending state.
10. a kind of test based on the fexible film sensing element sensibility testing arrangement as described in claim 1-9 any one
Method, which is characterized in that it includes the following steps:
Fexible film sensing element is attached on aluminium flake, and aluminium flake is clamped between a pair of of translation component with flat state,
Measure resistance value when fexible film sensing element flat state；
Control translation component is mutually drawn close so that aluminium flake bending, measures the resistance when bending state of fexible film sensing element
Value；
The electricity when bending state of resistance value and fexible film sensing element when by fexible film sensing element flat state
The sensitivity of computing the resistor value fexible film sensing element.
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| CN201910175817.5A CN109883314B (en) | 2019-03-08 | 2019-03-08 | Device and method for testing sensitivity of flexible thin film sensing element |
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| CN201910175817.5A CN109883314B (en) | 2019-03-08 | 2019-03-08 | Device and method for testing sensitivity of flexible thin film sensing element |
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| CN115420981A (en) * | 2022-09-02 | 2022-12-02 | 国网安徽省电力有限公司亳州供电公司 | Method and device for determining relay protection sensitivity of alternating current power grid |
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| CN109883314B (en) | 2020-06-02 |
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