CN208012523U - Exempt to destroy U-shaped strain gauge - Google Patents
Exempt to destroy U-shaped strain gauge Download PDFInfo
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- CN208012523U CN208012523U CN201820629035.5U CN201820629035U CN208012523U CN 208012523 U CN208012523 U CN 208012523U CN 201820629035 U CN201820629035 U CN 201820629035U CN 208012523 U CN208012523 U CN 208012523U
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- bar
- strain gauge
- foot target
- card slot
- destroy
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Abstract
The utility model belongs to architectural engineering Test And Check Technology field.One kind is exempted to destroy U-shaped strain gauge, including female bar, sub bar, elastic strain unit and foot target unit, and the sub bar is arranged with female bar coaxially slide socket；The both ends of the elastic strain unit are connected to by pivot joint on the sub bar and female bar respectively, and detect the linear strain of the sub bar and female bar；The outer end of the sub bar and female bar is both provided with foot target unit, and the foot target unit includes pedestal and connecting rod, is connected by bearing between the pedestal and connecting rod.The structure design of the utility model is reasonable, can realize the accurate measurement of concrete component linear strain, and can avoid destroying beyond strain gauge caused by strain gauge range because of nonlinear ess-strain or deflection.
Description
Technical field
The utility model belongs to architectural engineering Test And Check Technology field, and in particular to one kind is exempted to destroy U-shaped strain gauge.
Background technology
The research of reinforced concrete structural element stress and deformation performance is to carry out scientific design to reinforced concrete structure
It is basic according to one of, need to use various modifications sensing in the experimental study of Reinforced Concrete Members with Flexure stress deformation behavior
Device, wherein U-shaped（Or ∏ types）Strain gauge is more suitable for the linear strain of test test specimen destructive process, however, due to existing U-shaped
Strain gauge is especially a lack of protective device and ensures to strain the device etc. linearly transmitted, nothing in the design defect of configuration aspects
By be during experimental test or carry and installation process in, be likely to lead to the damage of U-shaped strain gauge, it is even more impossible to ensure
Measuring accuracy, the loss thus brought is very big, such as when test piece deformation value is tested, the angle of two acra of strain gauge elastic element
Target is pasted on surface of test piece by binder and forms rigid connection, and angle target generates relative displacement with the deformation of surface of test piece to be made
Strain gauge can test the deformation of test specimen, but when deforming slightly larger, and the bending place that two limb of strain gauge is fixed on surface of test piece will produce
Raw excessive recurvation square simultaneously passes to elastic element, makes the deformation of test specimen that cannot synchronize transmission, to make test result be distorted, and
This irrational mix can also make elastic element generate fatigue after Reusability, more increase test error.Meanwhile by
In lacking protective structures, when test piece deformation value is excessive, angle target can drive elastic element to generate the change beyond its limit
Shape leads to the damage of U-shaped strain gauge.For this purpose, to avoid the damage of U-shaped strain gauge, and can precisely test reinforced concrete structure
Linear strain when member stress, it is necessary to develop a kind of Novel U-shaped strain gauge for exempting to destroy.
Invention content
The purpose of this utility model is in view of the above problems and insufficient, provides one kind and exempts to destroy U-shaped strain gauge, is tied
Structure reasonable design can realize precision measure, and can be from because of nonlinear ess-strain or deflection plussage
Journey, caused strain gauge destroy.
In order to achieve the above objectives, it is adopted the technical scheme that：
One kind is exempted to destroy U-shaped strain gauge, including female bar, sub bar, elastic strain unit and foot target unit, the sub bar and institute
State female bar coaxially slide socket setting；The both ends of the elastic strain unit are separately positioned on the sub bar and female bar,
And detect the linear strain of the sub bar and female bar；The outer end of the sub bar and female bar is both provided with foot target list
Member, the foot target unit include pedestal and connecting rod, are connected by bearing between the pedestal and connecting rod.
The outer end of the sub bar and female bar offers foot target card slot, and the connecting rod matching is arranged in the foot target card slot
It is interior, and be fixed in the foot target card slot by fastening nut.
It is provided with spring washer between the fastening nut and foot target card slot；When normal operation, the connecting rod is in spring
It is fixedly installed with the foot target card slot under the action of washer and fastening nut；When deflection is more than strain gauge range, the company
Bar can in the foot target card slot Relative sliding.
In bipod target card slot in the sub bar and female bar, one of U-shaped hatch frame setting of foot target card slot, separately
One foot target card slot is in closure strip hole structure setting；Or bipod target card slot is U-shaped opening structure setting.
Elastic strain unit includes arc-shaped resilient support substrate, foil gauge and conducting wire, the foil gauge matching fitting
Be arranged on the supporting substrate, and with supporting substrate synchronize deform, it is described resilient support substrate both ends respectively with sub bar and
Female bar pivot joint setting.
Protective cover is provided on the outside of the foil gauge, live conductor nose is arranged in the wire terminals.
Mother's bar inner end is provided with pilot hole, and the inner end of the sub bar is provided with guide rod；The pilot hole side
Limit sliding chutes are offered on wall, and limited block corresponding with limit sliding chutes is provided on the guide rod.
The length of the limit sliding chutes and the range of elastic strain unit match.
The section of the pilot hole is circular configuration, and the limited block is detachably fixed company with guide rod by screw thread
It connects.
Using above-mentioned technical proposal, acquired advantageous effect is：
The bearing structure design of foot target unit in the utility model, it can be ensured that transmission is surface of test piece point-to-point transmission
Linear displacement, and can avoid bipod target unit relative torsion caused by moment-in-plane and U-shaped strain gauge is made to damage.
Articulated manner between the elastic strain unit of the application and female bar and sub bar ensure arc-shaped elastic supporting substrate with
Female bar generates synchronous linear elastic ones with the relative motion of sub bar, to drive foil gauge precisely to collect test specimen
Linear strain between two measuring points.
Limit sliding chutes on female bar and sub bar upper limit in the application keep off convex design, it can be ensured that the two is only certain
Linear slide is done in range, and elastic element and foil gauge is avoided to be destroyed beyond elasticity measurement range.
The design of spring washer and female bar outer end U-shaped card slot in the application generates convenient for test specimen exceeds strain gauge test volume
Angle target can generate mutually sliding or be disengaged with gauge length mother's bar when the moderate finite deformation of journey, avoid the damage of strain gauge tension.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the left view structural representation of Fig. 1.
Serial number in figure：101 be female bar, 102 be sub bar, 103 be pilot hole, 104 be guide rod, 105 be limit sliding chutes,
106 be limited block, 107 be foot target card slot, 200 be foot target unit, 201 be pedestal, 202 be connecting rod, 203 be fasten nut,
204 it is spring washer, 300 be elastic strain unit, 301 be resilient support substrate, 302 be foil gauge, 303 be conducting wire, 304 is
Protective cover, 305 are crimping nose.
Specific implementation mode
It elaborates to specific embodiment of the present utility model below in conjunction with attached drawing.
Referring to Fig. 1 and Fig. 2, the application one kind is exempted to destroy U-shaped strain gauge, including female bar 101, sub bar 102, elastic strain list
Member 300 and foot target unit 200, sub bar 102 are slidably socketed setting with female 101 coaxial linear of bar；The both ends of elastic strain unit 300
It is separately positioned on sub bar 102 and female bar 101, and detects the linear strain of sub bar 102 and female bar 101；Sub bar 102 and female bar
101 outer end is both provided with foot target unit 200, and foot target unit 200 includes pedestal 201 and connecting rod 202, pedestal 201 and connecting rod
Connected by bearing between 202, pedestal and connecting rod can connect respectively with the outer ring of bearing and inner ring or respectively outer ring and
A part for inner ring so as to ensure that is transmitted is the linear displacement of surface of test piece point-to-point transmission, and can avoid moment-in-plane
Caused bipod target unit relative torsion and so that U-shaped strain gauge is damaged.
The outer end of sub bar 102 and female bar 101 offers foot target card slot 107, and the matching of connecting rod 202 is arranged in foot target card slot
It in 107, and is fixed in foot target card slot 107 by fastening nut 203, foot target card slot is bar shape trench hole, can realize foot
Position between target unit and sub bar and female bar is adjusted.Since the range of strain gauge is limited, during measuring, test specimen
When deflection is more than the range of strain gauge, traditional strain gauge can destroy, therefore the application is by fastening nut 203 and foot
Spring washer 204 is set between target card slot 107, i.e., by fasten nut and spring washer realize connecting rod fixation and can be larger
Deflection in the case of realize connecting rod movement, fasten 203 holddown spring washer 204 of nut dynamics it is appropriate, generally with close to
Screwing one again afterwards can meet the requirements；To ensure when normal operation, connecting rod 202 is in spring washer 204 and fastens nut
It is fixedly installed with foot target card slot 107 under the action of 203；When deflection is more than strain gauge range, connecting rod 202 is in foot target card slot
Relative sliding in 107, it is bad to avoid being drawn.
When test piece deformation amount is excessive, when above structure deficiency is destroyed to avoid strain gauge, then by sub bar 102 or female bar
101 foot target card slot 107 is designed to U-shaped opening structure, and another foot target card slot 107 is in strip hole closed configuration, so as to make
It obtains when deflection is larger, one of foot target unit is detached from out of foot target card slot, realizes that entire strain gauge avoids bearing to strain
Active force.
Elastic strain unit 300 in the present embodiment includes arc-shaped resilient support substrate 301, foil gauge 302 and leads
Line 303, foil gauge matching fitting is arranged on supporting substrate, and synchronizes and deform with supporting substrate, and the two of resilient support substrate 301
End is arranged with sub bar 102 and female pivot joint of bar 101 respectively, is provided with protective cover 304 on the outside of foil gauge, wire terminals are provided with pressure
Line nose 305.It is arranged by being pivotally connected, pivot joint shaft can avoid elastic strain unit 300 and female bar 101 and sub bar 102 because of rigidity
The adverse effect that the moment of flexure that connection generates transmits elastic strain unit deformation, it is ensured that elastic strain unit 300 can draw with deformation
Guide assembly, which synchronizes, to be generated linear deformation and is incuded and passed to by foil gauge external data acquisition system, and being pivotally connected in shaft can be added
Certain lubricating oil, resistance wire and conducting wire 303 connection of foil gauge 302 connect the wire termination setting crimping nose of resistance wire, crimping
Nose can prevent foil gauge from influencing the precision that deformation incudes, the protective cover and elasticity of the present embodiment from avulsion on resilient support substrate
Supporting substrate is identical material, and preferable protective effect can be played to foil gauge.
Further, 101 inner end of female bar is provided with pilot hole 103, the inner end of sub bar 102 is provided with guide rod
104；Limit sliding chutes 105 are offered on 103 side wall of pilot hole, and limiting block corresponding with limit sliding chutes 105 is provided on guide rod
Block 106, and the length of limit sliding chutes 105 and the range of elastic strain unit 300 match.The structure design, can not only
Opposite linear can only be generated by ensureing between sub bar 102 and female bar 101 slides and avoids generating axial rotation, and makes female bar 101
Opposite linear slippage between sub bar 102 is also limited, avoids deformation inductive component from being drawn bad.
The schematical specific implementation mode of the utility model is above are only, is not intended to limit the scope of the utility model,
Any those skilled in the art can carry out above-described embodiment more under the premise of not departing from the utility model design and principle
Kind change, modification, replacement and modification.For example convex bolt and the install nuts changed into of limiting block in embodiment are formed into bolt and nut
Fastening structure, so that gauge length is positioned and is pasted more convenient when foot target, or by the alternation of cross-section of pilot hole and guide rod be more
Side shape, sub bar foot target card slot also change into the specific implementation that U-shaped foot target card slot of opening etc. may make up the utility model
Example, is not described in detail one by one herein.
Claims (9)
1. one kind is exempted to destroy U-shaped strain gauge, which is characterized in that including：
Female bar；
Sub bar, the sub bar are arranged with female bar coaxially slide socket；
The both ends of elastic strain unit, the elastic strain unit are separately positioned on the sub bar and female bar, and are detected
The linear strain of the sub bar and female bar；
With foot target unit, the outer end of the sub bar and female bar is both provided with foot target unit, and the foot target unit includes base
Seat and connecting rod, are connected between the pedestal and connecting rod by bearing.
2. according to claim 1 exempt to destroy U-shaped strain gauge, which is characterized in that the outer end of the sub bar and female bar is equal
Foot target card slot is offered, the connecting rod matching is arranged in the foot target card slot, and is fixed on the foot target by fastening nut
In card slot.
3. according to claim 2 exempt to destroy U-shaped strain gauge, which is characterized in that the fastening nut and foot target card slot it
Between be provided with spring washer；When normal operation, the connecting rod spring washer and fasten nut under the action of with the foot target
Card slot is fixedly installed；When deflection is more than strain gauge range, connecting rod Relative sliding in the foot target card slot.
4. according to claim 2 or 3 exempt to destroy U-shaped strain gauge, which is characterized in that two in the sub bar and female bar
In foot target card slot, wherein the U-shaped hatch frame setting of a foot target card slot, another foot target card slot is in strip hole structure setting；Or
Bipod target card slot is U-shaped opening structure setting.
5. according to claim 1 exempt to destroy U-shaped strain gauge, which is characterized in that elastic strain unit includes arc-shaped
Substrate, foil gauge and conducting wire are flexibly supported, the foil gauge matching fitting is arranged on the supporting substrate, and with supporting substrate
The both ends of synchronous deformation, the resilient support substrate are arranged with sub bar and female bar pivot joint respectively.
6. according to claim 5 exempt to destroy U-shaped strain gauge, which is characterized in that be provided with protection on the outside of the foil gauge
Live conductor nose is arranged in cover, the wire terminals.
7. according to claim 1 exempt to destroy U-shaped strain gauge, which is characterized in that mother's bar inner end is provided with guiding
The inner end in hole, the sub bar is provided with guide rod；Limit sliding chutes are offered on the pilot hole side wall, are set on the guide rod
It is equipped with limited block corresponding with limit sliding chutes.
8. according to claim 7 exempt to destroy U-shaped strain gauge, which is characterized in that the length of the limit sliding chutes and elasticity
The range of strain unit matches.
9. according to claim 7 exempt to destroy U-shaped strain gauge, which is characterized in that the section of the pilot hole is round ties
Structure, the limited block, which is detachably fixed with guide rod by screw thread, to be connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820629035.5U CN208012523U (en) | 2018-04-28 | 2018-04-28 | Exempt to destroy U-shaped strain gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820629035.5U CN208012523U (en) | 2018-04-28 | 2018-04-28 | Exempt to destroy U-shaped strain gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208012523U true CN208012523U (en) | 2018-10-26 |
Family
ID=63893230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820629035.5U Active CN208012523U (en) | 2018-04-28 | 2018-04-28 | Exempt to destroy U-shaped strain gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208012523U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534663A (en) * | 2018-04-28 | 2018-09-14 | 郑州大学 | Exempt to destroy U-shaped strain gauge |
| CN111780708A (en) * | 2020-06-06 | 2020-10-16 | 河南交院工程技术有限公司 | Strain gauge |
| CN111780707A (en) * | 2020-06-06 | 2020-10-16 | 河南交院工程技术有限公司 | Strain measuring device |
-
2018
- 2018-04-28 CN CN201820629035.5U patent/CN208012523U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534663A (en) * | 2018-04-28 | 2018-09-14 | 郑州大学 | Exempt to destroy U-shaped strain gauge |
| CN108534663B (en) * | 2018-04-28 | 2024-02-02 | 郑州大学 | Damage-free U-shaped strain gauge |
| CN111780708A (en) * | 2020-06-06 | 2020-10-16 | 河南交院工程技术有限公司 | Strain gauge |
| CN111780707A (en) * | 2020-06-06 | 2020-10-16 | 河南交院工程技术有限公司 | Strain measuring device |
| CN111780707B (en) * | 2020-06-06 | 2021-12-14 | 河南交院工程技术集团有限公司 | Strain measuring device |
| CN111780708B (en) * | 2020-06-06 | 2021-12-14 | 河南交院工程技术集团有限公司 | Strain gauge |
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