CN105004262B - The double interdigitated metal foil gauges of lateral deviation full-bridge of the horizontal local derviation of measurable surface strain - Google Patents
The double interdigitated metal foil gauges of lateral deviation full-bridge of the horizontal local derviation of measurable surface strain Download PDFInfo
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Abstract
A kind of double interdigitated metal foil gauges of lateral deviation full-bridge of the horizontal local derviation of measurable surface strain, including substrate and four sensitive grids, the two ends of each sensitive grid connect a lead-out wire respectively, each sensitive grid includes sensitive segment and changeover portion, and the axis of all sensitive segments is straight line, is arranged in parallel and in approximately the same plane；Determined in sensitive segment axis in plane, be axial direction along the sensitive segment axis direction, with axially vertical direction for laterally；Four sensitive gate resistances are consistent, resistance change is consistent under same strain, sensitive grid is transversely referred to as from top to bottom, sensitive grid up and down, sensitive grid and lower sensitive grid on down, upper upper sensitive grid and between sensitive grid be in up and down interdigital arrangement, also in interdigital arrangement between lower upper sensitive grid and lower sensitive grid；Four sensitive grid centers zero deflection in the axial direction, there is deviation in the horizontal.The present invention can measuring strain more can the horizontal single order of effective detection surface strain and second order local derviation.
Description
Technical field
The present invention relates to sensor field, especially a kind of metal strain plate.
Background technology
The operation principle of metal resistance strain gauge is resistance strain effect, i.e. wire is in effect strained, its electricity
Hinder and occur corresponding change with the size of mechanically deform occurred (stretching is compressed).The theoretical formula of resistance strain effect
It is as follows:
Wherein R is its resistance value, and ρ is metal material resistivity, and L is metal material length, and S is metal material sectional area.
Wire is bearing to strain and during occurring mechanically deform, ρ, L, S three will change, so as to will necessarily cause gold
Belong to the change of material resistance value.When metal material is stretched, length increase, sectional area reduces, resistance value increase；When compressed
When, length reduces, and sectional area increase, resistance value reduces.Therefore, as long as the change of resistance value can be measured, wire is just understood
Strained situation.Metal material resistance change rate formula can be exported by the relevant knowledge such as formula (1) and the mechanics of materials
Wherein Δ R is resistance variation amount, and Δ L is the change of metal material length on pulling force or pressure action direction
Amount, ε is that the strain in same direction is usually referred to as axial strain, and K is metal material ga(u)ge factor.
In actual applications, metal resistance strain gauge is pasted onto to the table of Sensor Elastic Element or tested machine components
Face.When the flexible member in sensor or tested machine components are produced strain by active force, foil gauge thereon is pasted onto
Identical mechanically deform occurs therewith, causes strain sheet resistance to occur corresponding change.At this moment, resistance strain gage is just by mechanical quantity
Be converted to the variable quantity output of resistance.
But we are also required to understand the partial derivative of workpiece strain sometimes, such as have three kinds of occasions, but not limited to this below
Three, it is necessary to use workpiece surface strain partial derivative：
First, due to occurring that strain is concentrated near at workpiece shapes mutation, often occur damage first as workpiece
Strain partial derivative near at place, monitoring shape mutation, can intuitively obtain strain intensity at this.
Second, largely existed by comer pieces in building, bridge, plant equipment, the relevant knowledge of the mechanics of materials is taught that, bending
The axial strain of beam surface is directly proportional to section turn moment, and the axial partial derivative of section turn moment is directly proportional to section shearing strain, that is,
Section shearing strain can be known by the axial partial derivative of surface axial strain, and the shearing strain can not be with foil gauge in workpiece table
Face direct measurement is arrived；
3rd, during applied elasticity research workpiece strain, internal strain is decided by partial differential equation, and equation solution needs
Boundary condition, and workpiece surface strain partial derivative is exactly one of boundary condition, this is that general foil gauge can not be provided.
The content of the invention
In order to overcome the shortcomings of that existing metal strain plate can not detect strain local derviation, present invention offer one kind can be measured should
The lateral deviation of the horizontal local derviation of measurable surface strain of the horizontal single order of change energy effective detection surface strain and second order local derviation is complete
The double interdigitated metal foil gauges of bridge.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of double interdigitated metal foil gauges of lateral deviation full-bridge of the horizontal local derviation of measurable surface strain, including substrate,
The metal strain plate also includes four sensitive grids, and the two ends of each sensitive grid are connected in a lead-out wire, the substrate respectively
Fixed four sensitive grids；
Each sensitive grid includes sensitive segment and changeover portion, and the two ends of the sensitive segment are changeover portion, and the sensitive segment is in thin
Strip, the changeover portion is in tubbiness shape, and the resistance of the sensitive segment is much larger than the resistance of the changeover portion, same strain state
Under the increased resistance value of the sensitive segment be much larger than the increased resistance value of the changeover portion, the increased resistance value of the changeover portion connects
It is bordering on 0；
All cross section centres of form of each sensitive segment constitute sensitive segment axis, and the sensitive segment axis is straight line section, respectively
The diameter parallel of sensitive segment and it is generally aligned in the same plane, sensitive segment axis is determined in plane, along the sensitive segment axis side
To i.e. axially, with axially vertical direction for laterally；All shape of cross section sizes of each sensitive segment are consistent；Take each sensitivity
The axis point midway of section and the nominal particle that place sensitive segment is constituted by nominal mass of the sensitive segment resistance value, each is sensitive
The centroid position that the nominal particle of section is collectively forming is the center of sensitive grid；
The sensitive segment all-in resistance of four sensitive grids is consistent, total electricity of four sensitive grids sensitive segment under identical strain
Hinder that changing value is consistent, four sensitive grids are centrally located on straight line, and the straight line is perpendicular to four sensitive grids any one
Bar sensitive segment axis, four sensitive grids are referred to as upper sensitive grid from top to bottom along this rectilinear direction, up and down sensitive grid, it is lower on
Sensitive grid and lower sensitive grid；Each sensitive segment axis determined in plane, upper sensitive grid and up and down between sensitive grid in interdigital
Arrangement, is also in interdigital arrangement between lower upper sensitive grid and lower sensitive grid；
Four sensitive grid centers zero deflection in the axial direction, there is a deviation in the horizontal, upper sensitive grid center with it is sensitive up and down
The distance at grid center is Δ y1；The distance at sensitive grid center and lower upper sensitive grid center is Δ y up and down2, lower upper sensitive grid center with
Lower sensitive grid centre distance is Δ y3, the distance at upper sensitive grid center and lower upper sensitive grid center is Δ y4=Δ y1+Δ
y2, sensitive grid center and lower sensitive grid centre distance are Δ y up and down5=Δ y2+Δy3, upper sensitive grid center with it is lower quick
It is Δ y to feel grid centre distance6=Δ y1+Δy2+Δy3。
In the present invention, the sensitive segment all-in resistance of four sensitive grids should be consistent, and four sensitive grids are under identical strain
Sensitive segment all-in resistance variable quantity should be consistent.Because measuring bridge has four bridge arms, can by by four sensitive grids in a certain order
It is respectively arranged in four electric bridges, so this foil gauge is called full-bridge.Such as, the cross section of the sensitive segment of four sensitive grids is homogeneous
Together, material is consistent, and the summation of the length of the sensitive segment of four sensitive grids is equal.
Upper sensitive grid and the distance, delta y at the center of sensitive grid up and down1Generally less than even much smaller than the length of each sensitive segment
Degree, the interdigital arrangement refers to：Two sensitive grids each sensitive segment axis institute in the plane, with sensitive segment axis vertical direction
The sensitive segment of two sensitive grids distribution straggly, the order and number of times occurred respectively to the sensitive segment of two sensitive grids in this direction is not done
Limitation.Equally, lower upper sensitive grid is also in interdigital arrangement with lower sensitive grid.However, upper sensitive grid and lower upper sensitive grid and under
Lower sensitive grid is not in interdigital arrangement；Sensitive grid and lower upper sensitive grid and lower sensitive grid are not in interdigital arrangement up and down；On lower
With upper sensitive grid and up and down, sensitive grid is not in interdigital arrangement to sensitive grid；Lower sensitive grid is sensitive with upper sensitive grid and up and down
Grid are not in interdigital arrangement.Due to upper sensitive grid, up and down sensitive grid, lower upper sensitive grid and lower sensitive grid relative position by
Foil gauge production technology ensures relatively accurately to be secured, and this is also that the present invention can detect the pass of the horizontal partial derivative of workpiece strain
One of key.
Using the linear relationship between metal material increased resistance value and strain, first, can be with as common foil gauge
For measuring strain；Second, the resistance difference and the ratio of distances constant at the center of two sensitive grids of any two are anti-in four sensitive grids
The horizontal local derviation of strain is reflected；3rd, lower sensitive grid and upper sensitive gate resistance sum subtract above and below sensitive grid with it is lower quick
The difference of sense gate resistance sum is directly proportional to the axial second order local derviation strained.
It should be noted that keeping the change of each sensitive grid changeover portion all-in resistance and changeover portion resistance under external strain in technique
Change amount one, which is shown, heightens measurement accuracy, also can conduct if the resistance of changeover portion and the lower resistance change of strain be can not ignore
Systematic error is eliminated in detection.
Further, upper sensitive grid and sensitive grid, lower upper sensitive grid up and down and lower sensitive grid mirror centered on the x-axis of center
As being arranged symmetrically.That is Δ y1=Δ y3.It is of course also possible to use both other unequal schemes.
Further, the metal strain plate also includes cover plate, and the cover plate is covered in the sensitive grid and substrate.
Further, the sensitive grid is wire form, foil, diaphragm type or thick-film type sensitive grid.
Further, the substrate is glued membrane substrate, glass fabric substrates, asbestos base bottom, metallic substrates or temporary substrate.
Four sensitive grids are arranged in substrate from top to bottom.It is of course also possible to be other arrangements.
Beneficial effects of the present invention are mainly manifested in：Can not only measure workpiece surface strain, more can effective detection surface should
Become horizontal single order and second-order partial differential coefficient.
Brief description of the drawings
Fig. 1 is the schematic diagram of the double interdigitated metal foil gauges of lateral deviation full-bridge of the horizontal local derviation of measurable surface strain.
Fig. 2 is the double interdigitated metal foil gauge top views of lateral deviation full-bridge of the horizontal local derviation of measurable surface strain.
Fig. 3 is measuring bridge schematic diagram.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
1~Fig. 3 of reference picture, a kind of double interdigitated metal strains of lateral deviation full-bridge of horizontal local derviation of measurable surface strain
Piece, including substrate, the metal strain plate also include four sensitive grids, and the two ends of each sensitive grid connect an extraction respectively
Four sensitive grids are fixed in line, the substrate；
Each sensitive grid includes sensitive segment and changeover portion, and the two ends of the sensitive segment are changeover portion, and the sensitive segment is in thin
Strip, the changeover portion is in tubbiness shape, and the resistance of the sensitive segment is much larger than the resistance of the changeover portion, same strain state
Under the increased resistance value of the sensitive segment be much larger than the increased resistance value of the changeover portion, the increased resistance value of the changeover portion connects
It is bordering on 0；
All cross section centres of form of each sensitive segment constitute sensitive segment axis, and the sensitive segment axis is straight line section, respectively
The diameter parallel of sensitive segment and it is generally aligned in the same plane, sensitive segment axis is determined in plane, along the sensitive segment axis side
To i.e. axially, with axially vertical direction for laterally；All shape of cross section sizes of each sensitive segment are consistent；Take each sensitivity
The axis point midway of section and the nominal particle that place sensitive segment is constituted by nominal mass of the sensitive segment resistance value, each is sensitive
The centroid position that the nominal particle of section is collectively forming is the center of sensitive grid；
The sensitive segment all-in resistance of four sensitive grids is consistent, total electricity of four sensitive grids sensitive segment under identical strain
Hinder that changing value is consistent, four sensitive grids are centrally located on straight line, and the straight line is perpendicular to four sensitive grids any one
Bar sensitive segment axis, four sensitive grids are referred to as upper sensitive grid from top to bottom along this rectilinear direction, up and down sensitive grid, it is lower on
Sensitive grid and lower sensitive grid；Each sensitive segment axis determined in plane, upper sensitive grid and up and down between sensitive grid in interdigital
Arrangement, is also in interdigital arrangement between lower upper sensitive grid and lower sensitive grid；
Four sensitive grid centers zero deflection in the axial direction, there is a deviation in the horizontal, upper sensitive grid center with it is sensitive up and down
The distance at grid center is Δ y1；The distance at sensitive grid center and lower upper sensitive grid center is Δ y up and down2, lower upper sensitive grid center with
Lower sensitive grid centre distance is Δ y3, the distance at upper sensitive grid center and lower upper sensitive grid center is Δ y4=Δ y1+Δ
y2, sensitive grid center and lower sensitive grid centre distance are Δ y up and down5=Δ y2+Δy3, upper sensitive grid center with it is lower quick
It is Δ y to feel grid centre distance6=Δ y1+Δy2+Δy3。
The double interdigitated metal foil gauges of lateral deviation full-bridge of the horizontal local derviation of the measurable surface strain of the present embodiment, including
One substrate 1, has upper sensitive grid 2, up and down sensitive grid 3 by Fig. 2 left and right order, lower upper sensitive grid 4, lower sensitive grid 5, eight
Individual lead-out wire 6, can also there is cover plate (not giving expression in each accompanying drawing).
Sensitive grid 2 can be fixed on substrate 1, up and down sensitive grid 3, lower upper sensitive grid 4 and lower sensitive grid 5 are used for
Keep shape, positions and dimensions that each sensitive grid is fixed；Substrate 1 is very thin, so that the strain of surface of test piece be accurately transfer to
Sensitive grid 2 is gone up, up and down sensitive grid 3, lower upper sensitive grid 4 and lower sensitive grid 5.Substrate 1 can be glued membrane substrate, glass fibre
Substrate, asbestos base bottom, metallic substrates and temporary substrate.Generally with cohering, weld, substrate is fixed on survey by the mode such as ceramic spraying
The tested position of test specimen.Some can be also printed in substrate 1 is used for the lines that foil gauge is positioned.
Cover plate is made of materials such as paper or glue, is covered in sensitive grid 2, up and down sensitive grid 3, lower upper sensitive grid 4, under
On lower sensitive grid 5 and substrate 1, play the protective layer of protection against the tide, corrosion protection, loss prevention etc..
Lead 6 is used to connect sensitive grid and measuring circuit, upper sensitive grid 2, up and down sensitive grid 3, lower upper sensitive grid 4 and under
Lower sensitive grid 5 respectively has two leads 6, pair with foil and membrane type foil gauge, the upper sensitive grid 2 that lead 6 is connected with it, up and down
Sensitive grid 3, lower upper sensitive grid 4 or lower sensitive grid 5 combine as a whole.The pin of upper sensitive grid 2 is 6-1 and 6-2, sensitive up and down
The pin of grid 3 is 6-3 and 6-4, and the pin of lower upper sensitive grid 4 is 6-5 and 6-6, and the pin of lower sensitive grid 5 is 6-7 and 6-8.
Upper upper sensitive grid 2, sensitive grid 3 up and down, lower upper sensitive grid 4 and lower sensitive grid 5 according to its metal sensitive material and
The difference of processing technology, can be wire form, foil, diaphragm type, thick-film type.No matter which kind of sensitive grid 2 is gone up on, up and down sensitive grid 3,
The equal very little of thickness of sensitive grid 4 and lower sensitive grid 5 on down so that go up sensitive grid 2, up and down sensitive grid 3, lower upper sensitive grid 4
The deformation of workpiece is depended on it and change with the axial length of lower sensitive grid 5.The basic innovation of the present invention is
Upper sensitive grid 2, sensitive grid 3, the cooperation between lower upper sensitive grid 4 and lower sensitive grid 5, there is following main points up and down：
First, four sensitive grids are arranged in substrate, sensitive grid 2 are referred to as, up and down sensitive grid 3, lower upper sensitivity
Grid 4 and lower sensitive grid 5.
Second, upper sensitive grid 2, sensitive grid 3 up and down, lower upper sensitive grid 4 and lower sensitive grid 5 can be divided into multiple transition
The connection of each sensitive segment 8 is formed sensitive grid by section 7 and multiple sensitive segments 8, each changeover portion 7.Comparatively, sensitive segment 8 is elongated in shape,
Resistance is larger and its resistance is more sensitive to strain；The changeover portion 7 is in tubbiness shape substantially so that the resistance of the changeover portion
Very little and to strain it is insensitive, resistance variations are close to 0 under working condition, therefore the summation of sensitive segment resistance is essentially single
The all-in resistance of sensitive grid.Fig. 2 has marked sensitive segment 8 and changeover portion 7 in more detail from apparent angle.
3rd, upper sensitive grid 2, up and down sensitive grid 3, the cross section of sensitive segment 8 of lower upper sensitive grid 4 and lower sensitive grid 5
All same, and upper sensitive grid 2, sensitive grid 3 up and down, the respective length of sensitive segment 8 of lower upper sensitive grid 4 and lower sensitive grid 5
Summation is identical.Ignore the resistance of changeover portion 7, upper sensitive grid 2, up and down sensitive grid 3, lower upper sensitive grid 4 and lower sensitive grid 5
All-in resistance is all equal, and sensitive segment all-in resistance variable quantity should be consistent under identical strain for four sensitive grids.
4th, the sensitive segment 8 of each sensitive grid is in elongated strip, and all cross section centres of form composition of each sensitive segment 8 is quick
Feel section axis, the axis of sensitive segment 8 is straight line section, the diameter parallel of each sensitive segment 8 and be generally aligned in the same plane.Each
Projection of shape of all cross sections of sensitive segment 8 along sensitive segment axis direction is consistent.Take the axis point midway of each sensitive segment
And the nominal particle of place sensitive segment is constituted by nominal mass of the sensitive segment resistance value, the nominal particle of each sensitive segment is common
The centroid position of formation is the center of sensitive grid.
5th, upper sensitive grid 2, up and down sensitive grid 3, lower upper sensitive grid 4 and lower sensitive grid 5 in vertical view, they each
Bar sensitive segment is respectively provided with symmetry axis and symmetrical overlapping of axles (y-axis in Fig. 2), upper sensitive grid 2, up and down sensitive grid 3, lower upper sensitivity
Grid 4 and the respective sensitive segment 8 of lower sensitive grid 5 are all vertical with the symmetry axis.Upper upper sensitive grid 2, sensitive grid 3 up and down, it is lower on
The x-axis direction beginning and end position along along Fig. 2 is identical with each sensitive segment 8 in lower sensitive grid 5 for sensitive grid 4.It therefore, it can say
Upper sensitive grid 2, up and down sensitive grid 3, lower upper sensitive grid 4 and lower sensitive grid 5 only have lateral deviation without axial deviation, i.e., upper quick
Feel grid 2, up and down sensitive grid 3, the center of lower upper sensitive grid 4 and lower sensitive grid 5 is on the y axis.According to foil gauge in Fig. 2
Top view, the center of upper sensitive grid 2 is in y-axis and xUUThe intersection point of axle, the center of sensitive grid 3 is in y-axis and x up and downULThe friendship of axle
Point, the center of lower upper sensitive grid 4 is in y-axis and xLUThe intersection point of axle, the center of lower sensitive grid 5 is in y-axis and xLLThe intersection point of axle.On
The line midpoint at the upper center of sensitive grid 2 and the center of sensitive grid 3 up and down is y-axis and xUThe intersection point of axle, the lower upper center of sensitive grid 4 is with
The line midpoint at the lower center of sensitive grid 5 is y-axis and xLThe intersection point of axle.
6th, upper sensitive grid 2 and the interdigital arrangement of sensitive grid 3 up and down, lower upper sensitive grid 4 and the interdigital cloth of lower sensitive grid 5
Put, the center of these sensitive grids is in same symmetry axis y-axis.It is noted that interdigital arrange the direct result caused
It is that the upper center of sensitive grid 2 is closer to the center of sensitive grid 3 up and down, distance is Δ y1；Up and down the center of sensitive grid 3 with it is lower quick
The distance for feeling the center of grid 4 is Δ y2, the lower upper center of sensitive grid 4 is Δ y with the lower centre distance of sensitive grid 53, in upper sensitive grid 2
The distance at the heart and the lower upper center of sensitive grid 4 is Δ y4=Δ y1+Δy2, the center of sensitive grid 3 and the lower centre-to-centre spacing of sensitive grid 5 up and down
From for Δ y5=Δ y2+Δy3, the upper center of sensitive grid 2 is Δ y with the lower centre distance of sensitive grid 56=Δ y1+Δy2+Δy3,
As shown in Fig. 2 this six distances are lateral separation.Due to upper sensitive grid 2, sensitive grid 3 up and down, lower upper sensitive grid 4 and under
The relative position of lower sensitive grid 5 is ensured relatively accurately to be secured by foil gauge production technology, and this is also that the present invention can be detected
One of key of the horizontal local derviation of workpiece strain.
In summary, upper sensitive grid 2, up and down sensitive grid 3, lower upper sensitive grid 4 and the size phase of lower sensitive grid 5 in the present invention
Deng only having lateral deviation without axial deviation between each sensitive grid, each sensitive grid is centrally formed six kinds of different lateral deviations.
The resistance of upper sensitive grid is designated as RUU, up and down the resistance of sensitive grid be designated as RUL, the resistance of lower upper sensitive grid is designated as
RLU, the resistance of lower sensitive grid is designated as RLL.It is R that the resistance of four sensitive grids is equal in a free state0.By the foil gauge of the present invention
When being placed in certain and having strain surface, two sensitive grids are taken wherein, must have on one both this, must have.The sensitive grid of top
Resistance is designated as R0+ΔRu, following sensitive gate resistance is designated as R0+ΔRl, two sensitive grid centre distances are Δ yi, i be 1 to 6 it
One.The difference of two sensitive grid centers strain causes the difference of the two resistance change.Should using sensitive gate resistance and surface
The relation of change has：
Wherein i=1,2 ..., 6, εuFor the strain of the sensitive grid center of top, εlFor the strain at following sensitive grid,
Y is two sensitive grid line of centres point midways.This is the principle of the axial local derviation of measurement surface strain of the present invention.Above formula is actual to be
To the numerical computations of local derviation, according to the theory of numerical differentiation, this is with Δ yi/ 2 be step size computation differential, the mistake that the local derviation is calculated
Difference is no more thanRank, beHigher order indefinite small, ratio of precision is higher.Utilize foil gauge of the present invention
Four foil gauges, are limited the Δ y of foil gauge1=Δ y3, utilize sensitive gate resistance and the relation and second order local derviation of surface strain
Numerical computation method have：
Wherein y0For four sensitive grid centers of foil gauge point midway be x-axis and y-axis in Fig. 2 intersection point, εUUTo be upper
The strain of sensitive grid center, εULFor the strain of sensitive grid center up and down, εLUFor the strain of lower upper sensitive grid center, εLL
For the strain of lower sensitive grid center.
Electric bridge is coordinated to can be used for measuring strain, strain horizontal local derviation the present embodiment, it is assumed that bridge input voltage is ui, it is defeated
Go out voltage for uo, the schematic diagram of measuring bridge is shown in Fig. 3.When without workpiece effects of strain, each arm resistance of electric bridge is according to side clockwise
To being respectively labeled as R1、R2、R3、R4, in the case of will not obscuring also with electric bridge where these sign flag resistance.Each electricity
The sensitive grid or resistance of foil gauge can be laid on bridge.It is identical with general foil gauge arrangement, if pacified on multiple bridge arms
Sensitive grid is put, order, the requirement of strain difinite quality to each installation position.During without workpiece effects of strain, the output voltage of electric bridge
Formula is
Now, it is desirable to i.e. bridge balance uo=0, then it must is fulfilled for so-called bridge balance condition R1R3-R2R4=0,
The electric bridge of use is further met
R1=R2=R3=R4, (6)
Because, first, when meeting condition (6), according to relevant theoretical foil gauge sensitivity highest；Second, measuring strain or
The method of the horizontal local derviation of person's strain is required to condition (6) establishment.When foil gauge is also strained with external world's strain, above-mentioned electric bridge
Equilibrium condition is typically no longer set up, now
Due to Δ Ri＜ ＜ Ri(i=1,2,3,4 events) first ≈, the part Δ R that second ≈ ignores1ΔR3-ΔR2Δ
R4Also very little, and in engineering it can be made to be much smaller than compared with member-retaining portion.It is generally available the voltage measurement strain of formula (7) acquisition；
To the horizontal local derviation of strain can convolution (3), formula (4) and formula (7), each bridge arm sensitive grid of reasonable design arrangement and resistance can be obtained
With the horizontal single order local derviation of strain or the linear magnitude of voltage u of second order local derviationo, the voltage is that small-signal need to be put
Greatly.
Claims (5)
1. a kind of double interdigitated metal foil gauges of lateral deviation full-bridge of the horizontal local derviation of measurable surface strain, including substrate, its
It is characterised by：The metal strain plate also includes four sensitive grids, and the two ends of each sensitive grid connect a lead-out wire, institute respectively
State and four sensitive grids are fixed in substrate；
Each sensitive grid includes sensitive segment and changeover portion, and the two ends of the sensitive segment are changeover portion, and the sensitive segment is in elongate strip
Shape, the changeover portion is in tubbiness shape, and the resistance of the sensitive segment is much larger than institute under the resistance of the changeover portion, same strain state
The increased resistance value for stating sensitive segment is much larger than the increased resistance value of the changeover portion, the increased resistance value of the changeover portion close to
0；
All cross section centres of form of each sensitive segment constitute sensitive segment axis, and the sensitive segment axis is straight line section, each sensitivity
The diameter parallel of section and it is generally aligned in the same plane, sensitive segment axis is determined in plane, be along the sensitive segment axis direction
Axially, with axially vertical direction for laterally；All shape of cross section sizes of each sensitive segment are consistent；Take each sensitive segment
Axis point midway and the nominal particle that place sensitive segment is constituted by nominal mass of the sensitive segment resistance value, each sensitive segment
The centroid position that nominal particle is collectively forming is the center of sensitive grid；
The sensitive segment all-in resistance of four sensitive grids is consistent, and four sensitive grids all-in resistance of sensitive segment under identical strain becomes
Change value is consistent, and four sensitive grids are centrally located on straight line, and the straight line is quick perpendicular to any one of four sensitive grids
Feel section axis, four sensitive grids are referred to as upper sensitive grid from top to bottom along this rectilinear direction, up and down sensitive grid, lower upper sensitivity
Grid and lower sensitive grid；Each sensitive segment axis determined in plane, upper sensitive grid and between sensitive grid be in up and down interdigital arrangement,
Upper down is also in interdigital arrangement between sensitive grid and lower sensitive grid；
Four sensitive grid centers zero deflection in the axial direction, there is a deviation in the horizontal, upper sensitive grid center with sensitive grid up and down
The distance of the heart is Δ y1；The distance at sensitive grid center and lower upper sensitive grid center is Δ y up and down2, lower upper sensitive grid center with it is lower
Sensitive grid centre distance is Δ y3, the distance at upper sensitive grid center and lower upper sensitive grid center is Δ y4=Δ y1+Δy2, on
Lower sensitive grid center is Δ y with lower sensitive grid centre distance5=Δ y2+Δy3, in upper sensitive grid center and lower sensitive grid
Heart distance is Δ y6=Δ y1+Δy2+Δy3。
2. the double interdigitated metal strains of lateral deviation full-bridge of the horizontal local derviation of measurable surface strain as claimed in claim 1
Piece, it is characterised in that：The metal strain plate also includes cover plate, and the cover plate is covered in the sensitive grid and substrate.
3. the double interdigitated metals of lateral deviation full-bridge of the horizontal local derviation of measurable surface strain as claimed in claim 1 or 2 should
Become piece, it is characterised in that：The sensitive grid is wire form, foil, diaphragm type or thick-film type sensitive grid.
4. the double interdigitated metals of lateral deviation full-bridge of the horizontal local derviation of measurable surface strain as claimed in claim 1 or 2 should
Become piece, it is characterised in that：The substrate is glued membrane substrate, glass fabric substrates, asbestos base bottom, metallic substrates or temporary substrate.
5. the double interdigitated metals of lateral deviation full-bridge of the horizontal local derviation of measurable surface strain as claimed in claim 1 or 2 should
Become piece, it is characterised in that：Four sensitive grids are arranged in substrate from top to bottom.
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|---|---|---|---|---|
| CN105371750B (en) * | 2015-12-04 | 2017-12-29 | 浙江工业大学 | Close interdigital metal strain plate in five sensitive grids of axial direction distribution of axial local derviation outside measurable unilateral piece |
| CN105387798B (en) * | 2015-12-04 | 2018-06-22 | 浙江工业大学 | It can measure the five interdigital metal strain plate in sensitive grid side of cross direction profiles of bilateral biasing sensitive grid central cross local derviation |
| CN105509632B (en) * | 2015-12-04 | 2018-06-29 | 浙江工业大学 | It can measure the five interdigital metal strain plate in sensitive grid side of cross direction profiles of bilateral biasing sensitive grid local derviation laterally outside |
| CN105371751B (en) * | 2015-12-04 | 2018-06-29 | 浙江工业大学 | It can measure the five interdigital metal strains in sensitive grid side of axial distribution of axial local derviation on the outside of the double offset sensitive grid of unilateral side |
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| CN105423895B (en) * | 2015-12-04 | 2018-01-23 | 浙江工业大学 | The interdigital metal strain plate of the sensitive grid of lateral deviation three of horizontal local derviation outside measurable |
| CN105423898B (en) * | 2015-12-04 | 2017-12-05 | 浙江工业大学 | The five interdigital metal strain plates in sensitive grid side of axial direction distribution of axial local derviation outside measurable bilateral piece |
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| CN105352432B (en) * | 2015-12-04 | 2017-12-29 | 浙江工业大学 | The interdigital metal strain plate in sensitive grid side of cross direction profiles five of horizontal local derviation outside measurable bilateral piece |
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| CN105547135B (en) * | 2015-12-04 | 2018-03-02 | 浙江工业大学 | The interdigital metal strain plate of the sensitive grid of axial deviation three of measurable offset position axial direction local derviation |
| CN105318831B (en) * | 2015-12-04 | 2018-03-02 | 浙江工业大学 | Interdigital metal strain plate in five sensitive grids of axial direction distribution of the measurable unilateral central axial local derviation of double offset sensitive grid |
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| CN105423892B (en) * | 2015-12-04 | 2017-12-05 | 浙江工业大学 | Axial direction distribution six sensitive grid full-bridges, the three interdigital metal strain plate of axial local derviation outside measurable unilateral piece |
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| CN105423893B (en) * | 2015-12-04 | 2018-04-27 | 浙江工业大学 | The six sensitive grid full-bridge of axial deviation of the measurable bilateral biasing central axial local derviation of sensitive grid mixes interdigital metal strain plate |
| CN105423899B (en) * | 2015-12-04 | 2018-04-27 | 浙江工业大学 | The three sensitive grid metal strain plates of axial distribution of axial local derviation on the outside of measurable biasing sensitive grid |
| CN105423907B (en) * | 2015-12-04 | 2018-03-02 | 浙江工业大学 | Six sensitive grid full-bridge of cross direction profiles, the three interdigital metal strain plate of measurable unilateral double offset sensitive grid central cross local derviation |
| CN105352430B (en) * | 2015-12-04 | 2017-12-29 | 浙江工业大学 | The interdigital metal strain plate in sensitive grid side of cross direction profiles five of measurable unilateral double offset sensitive grid local derviation laterally outside |
| CN105865321B (en) * | 2015-12-04 | 2018-06-29 | 浙江工业大学 | It can measure the interdigital metal strain plate of three sensitive grid of axial deviation of axial local derviation on the outside of biasing sensitive grid |
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| CN105423905B (en) * | 2015-12-04 | 2017-12-29 | 浙江工业大学 | The sensitive grid full-bridge of lateral deviation six of measurable bilateral biasing sensitive grid local derviation laterally outside mixes interdigital metal strain plate |
| CN105387799B (en) * | 2015-12-04 | 2018-01-23 | 浙江工业大学 | The sensitive grid metal strain plate of cross direction profiles three of horizontal local derviation outside measurable |
| CN105371747B (en) * | 2015-12-04 | 2018-01-09 | 浙江工业大学 | The sensitive grid full-bridge metal strain plate of cross direction profiles six of horizontal local derviation outside measurable bilateral piece |
| CN105371746B (en) * | 2015-12-04 | 2018-01-23 | 浙江工业大学 | Interdigital metal strain plate in five sensitive grids of axial direction distribution of axial local derviation on the outside of measurable unilateral double offset sensitive grid |
| CN105318826B (en) * | 2015-12-04 | 2018-06-29 | 浙江工业大学 | It can measure the three sensitive grid metal strain plates of axial distribution of the biasing central axial local derviation of sensitive grid |
| CN105466331B (en) * | 2015-12-04 | 2018-01-23 | 浙江工业大学 | The sensitive grid full-bridge metal strain plate of cross direction profiles six of measurable bilateral biasing sensitive grid local derviation laterally outside |
| CN105466330B (en) * | 2015-12-04 | 2018-03-02 | 浙江工业大学 | The sensitive grid metal strain plate of cross direction profiles three of measurable biasing sensitive grid local derviation laterally outside |
| CN108020156B (en) * | 2016-11-04 | 2020-08-11 | 台湾艾华电子工业股份有限公司 | Bending sensor |
| CN113465488B (en) * | 2021-06-17 | 2022-05-17 | 上海交通大学 | Interdigital array device for measuring thickness of liquid film on wall surface and detection method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10260577A1 (en) * | 2002-12-21 | 2004-07-08 | Gwt Global Weighing Technologies Gmbh | Strain gauge for load cell, has resistance tracks, whose thickness can be altered e.g. by etching or abrasive techniques |
| CN201583247U (en) * | 2010-01-06 | 2010-09-15 | 中航电测仪器股份有限公司 | Double-output strainometer |
| CN202329533U (en) * | 2011-08-09 | 2012-07-11 | 浙江大合建设工程检测有限公司 | Strain gauge |
| CN103105124A (en) * | 2013-01-15 | 2013-05-15 | 南京航空航天大学 | Strain foil and method of full-bridge type and half-bridge type measurement shearing strain |
| CN204924167U (en) * | 2015-08-13 | 2015-12-30 | 浙江工业大学 | Two interdigital metal strain gauge of lateral deviation full -bridge of horizontal local derviation but measured surface meets an emergency |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011163442A1 (en) * | 2010-06-23 | 2011-12-29 | Vishay Precision Group, Inc. | Strain gage resistance calibration using shunts |
-
2015
- 2015-08-13 CN CN201510496635.XA patent/CN105004262B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10260577A1 (en) * | 2002-12-21 | 2004-07-08 | Gwt Global Weighing Technologies Gmbh | Strain gauge for load cell, has resistance tracks, whose thickness can be altered e.g. by etching or abrasive techniques |
| CN201583247U (en) * | 2010-01-06 | 2010-09-15 | 中航电测仪器股份有限公司 | Double-output strainometer |
| CN202329533U (en) * | 2011-08-09 | 2012-07-11 | 浙江大合建设工程检测有限公司 | Strain gauge |
| CN103105124A (en) * | 2013-01-15 | 2013-05-15 | 南京航空航天大学 | Strain foil and method of full-bridge type and half-bridge type measurement shearing strain |
| CN204924167U (en) * | 2015-08-13 | 2015-12-30 | 浙江工业大学 | Two interdigital metal strain gauge of lateral deviation full -bridge of horizontal local derviation but measured surface meets an emergency |
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