CN205002768U - Encapsulation shielding formula strainometer that area is met an emergency enlargedly - Google Patents
Encapsulation shielding formula strainometer that area is met an emergency enlargedly Download PDFInfo
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- CN205002768U CN205002768U CN201520757944.3U CN201520757944U CN205002768U CN 205002768 U CN205002768 U CN 205002768U CN 201520757944 U CN201520757944 U CN 201520757944U CN 205002768 U CN205002768 U CN 205002768U
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- strain
- gage
- elastic sheet
- anvil
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Abstract
The utility model discloses an encapsulation shielding formula strainometer that area is met an emergency enlargedly. The utility model discloses a temperature compensating foil gage and active [strain] gage, the elasticity thin slice that the active section was thin in the middle of it still included one, both ends inoperative section is thick, temperature compensating foil gage and active [strain] gage paste in the middle active section of elasticity thin slice, and the overcoat has the steel bushing on the elasticity thin slice, the left end face of elasticity thin slice has a supplementary steel sheet through spring coupling, and the left and right both ends bottom of elasticity thin slice has linked firmly a supplementary steel sheet respectively, the bottom surface of three blocks of supplementary steel sheets pasted respectively firstly glue the hammering block, the second glues the hammering block and the third glues the hammering block, temperature compensating foil gage and active [strain] gage are connected with the signal line respectively, and the signal line is concentrated on the signal wire connector. The utility model discloses simple to operate, swift to through the prestressing technique, guarantee the quality of pasting of foil gage, and have blocking function to the environmental disturbance, guarantee the measurement accuracy of meeting an emergency.
Description
Technical field
The utility model belongs to the loading test equipment technical field of bridge structure, is specifically related to a kind of encapsulation shielded strain gauge amplified with strain.
Background technology
In the loading test of bridge structure, the static strain of structure under load action and the dynamic strain measure under Moving Loads are the important contents of Test on Bridge Loading.Foil gauge is generally directly sticked in body structure surface by existing measuring method, and temperature compensation sheet then needs to find the locations of structures do not stressed and pastes.For the beam of single load bearing, temperature compensation sheet can vertically with active gage be pasted.But realistic bridges girder construction is varied, and structure is in biaxial stress state mostly, what very difficult searching compensating plate was desirable pastes position, makes measurement result very inaccurate.Secondly, field working conditions is poor, and pasting of foil gauge is difficult to meet the demands, and usually causes the failure of strain measurement.For straining very little bridge pier under load action, environment is very large to the interference of strain signal, and the method that foil gauge is directly pasted at body structure surface, can not measure the actual strain of bridge pier substantially.Vibrating string extensometer is more easy for installation than foil gauge, but it is difficult to eliminate temperature variation to the impact of measurement result, and particularly can not complete the measurement of dynamic strain, measuring accuracy is also poor.
Summary of the invention
The purpose of this utility model is the above-mentioned defect for existing in prior art, one is provided to have easy for installation, quick, and pass through prestressing technique, what ensure foil gauge pastes quality, and to environmental interference, there is function of shielding, ensure the encapsulation shielded strain gauge that the band strain of the measurement accuracy of strain is amplified.
The purpose of this utility model realizes by the following technical solutions: the encapsulation shielded strain gauge that the strain of this band is amplified, and comprises temperature compensation foil gauge and working strain gauge; It also comprises one piece of elastic sheet that middle active section is thinner, two ends inoperative section is thicker, and described temperature compensation foil gauge and working strain gauge stick in the middle active section of elastic sheet, and on elastic sheet, overcoat has steel bushing; The left side of elastic sheet is connected with one block of auxiliary steel plate by spring, is fixed with one block of auxiliary steel plate bottom the left and right two ends of elastic sheet respectively, and the bottom surface of three blocks of auxiliary steel plates is adhesive with the first sticky anvil, the second sticky anvil and the 3rd sticky anvil respectively; Described temperature compensation foil gauge and working strain gauge are connected to signal wire, and signal wire is assembled on signal wire joint.
Concrete, by screw or the fixing auxiliary steel plate of glue, the second sticky anvil, the 3rd sticky anvil bottom the left and right two ends of described elastic sheet.
Principle of work of the present utility model is:
Because overcoat has steel bushing on elastic sheet, make it both serve shielding environment interference effect, active section can be protected again from bending.Because strainometer has certain rigidity, foil gauge, signal wire, joint can in laboratory assembled in advance, and overall Reusability reduces the time of in-site installation, wiring, improves efficiency.
According to the length of strainometer, adopt auxiliary steel plate that three sticky anvils are bonded in body structure surface, strainometer right-hand member fixes the 3rd sticky anvil; Strainometer left end is connected to the first sticky anvil by spring, makes strainometer be in pre-tensile state; Strainometer left end and the second sticky anvil are connected, then trip spring, and now strainometer is by the second sticky anvil and the 3rd sticky anvil and body structure surface consolidation, and is in tensioning state.
When structure produces distortion under external force, strainometer is out of shape with structure.The distance that putative structure two glues between anvil is l, is deformed into Δ l, its strain stress=Δ l/l; The distortion of strainometer is similarly Δ l, but because the active section of foil gauge position is thin, two ends inoperative section is relatively thick, the strain of active section must be greater than mean strain (i.e. structural strain ε), and concrete ratio is determined by active section and the elastomeric length of two ends inoperative section, thickness relationship.
The beneficial effects of the utility model are as follows:
(1) active gage of strainometer and compensating plate have carried out overall package, ensure that active gage is consistent with the working temperature of compensating plate, reduce on-the-spot compensating plate and paste position and may there is and that produce temperature error different from active gage temperature variation.
(2) strainometer elastic body is in uniaxial stressed state, the strain stress relation of active gage and compensating plate is not by ectocine, reduce on-the-spot compensating plate to paste position and may there is strain, or the uncertain and measuring error produced of the strain stress relation of active gage and compensating plate.
(3) design that the utility model is special can strain by fixed proportion structure for amplifying, reduces the impact of various noise on measurement result.
(4) foil gauge is being pasted in process, adopts pre-tension technology, reduces tradition and pastes in method that may exist because foil gauge relaxes can not the phenomenon of Measurement accuracy structural strain.
(5) shielding action of steel bushing reduces the impact of neighbourhood noise, can improve measuring accuracy.
(6) strainometer encapsulated and plug and play joint can reduce the field wiring time, ensure wiring quality, increase work efficiency and measuring accuracy.
(7) the utility model strainometer can be reused, and decreases the consumption of foil gauge.
Accompanying drawing explanation
Fig. 1 is the vertical view of the utility model embodiment.
Fig. 2 is the A-A cut-open view of Fig. 1.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
See Fig. 1, Fig. 2, the present embodiment comprises temperature compensation foil gauge 6 and working strain gauge 7; It also comprises the elastic sheet 4 that middle active section is thinner, two ends inoperative section is thicker, and temperature compensation foil gauge 6 and working strain gauge 7 stick in the middle active section of elastic sheet 4, and on elastic sheet 4, overcoat has steel bushing 5; The left side of elastic sheet 4 is connected with one block of auxiliary steel plate by spring 2, be fixed with one block of auxiliary steel plate respectively by screw bottom the left and right two ends of elastic sheet 4, the bottom surface of three blocks of auxiliary steel plates is adhesive with the first sticky anvil 3 of sticky anvil 1, second and the 3rd sticky anvil 9 respectively; Temperature compensation foil gauge 6 and working strain gauge 7 are connected to signal wire 8, and signal wire 8 is assembled on signal wire joint 10.In figure, 11 is by geodesic structure.
Claims (2)
1., with the encapsulation shielded strain gauge that strain is amplified, comprise temperature compensation foil gauge and working strain gauge; It is characterized in that: it also comprises one piece of elastic sheet that middle active section is thinner, two ends inoperative section is thicker, and described temperature compensation foil gauge and working strain gauge stick in the middle active section of elastic sheet, and on elastic sheet, overcoat has steel bushing; The left side of elastic sheet is connected with one block of auxiliary steel plate by spring, is fixed with one block of auxiliary steel plate bottom the left and right two ends of elastic sheet respectively, and the bottom surface of three blocks of auxiliary steel plates is adhesive with the first sticky anvil, the second sticky anvil and the 3rd sticky anvil respectively; Described temperature compensation foil gauge and working strain gauge are connected to signal wire, and signal wire is assembled on signal wire joint.
2. the encapsulation shielded strain gauge of band strain amplification according to claim 1, is characterized in that: fix auxiliary steel plate by screw or glue bottom the left and right two ends of described elastic sheet, the second sticky anvil, the 3rd glues anvil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520757944.3U CN205002768U (en) | 2015-09-28 | 2015-09-28 | Encapsulation shielding formula strainometer that area is met an emergency enlargedly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520757944.3U CN205002768U (en) | 2015-09-28 | 2015-09-28 | Encapsulation shielding formula strainometer that area is met an emergency enlargedly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205002768U true CN205002768U (en) | 2016-01-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520757944.3U Expired - Fee Related CN205002768U (en) | 2015-09-28 | 2015-09-28 | Encapsulation shielding formula strainometer that area is met an emergency enlargedly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205002768U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883308A (en) * | 2019-04-19 | 2019-06-14 | 西安桥邦智能科技有限公司 | Assembling multipurpose strain gauge sensors |
-
2015
- 2015-09-28 CN CN201520757944.3U patent/CN205002768U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883308A (en) * | 2019-04-19 | 2019-06-14 | 西安桥邦智能科技有限公司 | Assembling multipurpose strain gauge sensors |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160127 Termination date: 20180928 |