CN212205961U - Resistance type surface strain sensor - Google Patents
Resistance type surface strain sensor Download PDFInfo
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- CN212205961U CN212205961U CN202020684811.9U CN202020684811U CN212205961U CN 212205961 U CN212205961 U CN 212205961U CN 202020684811 U CN202020684811 U CN 202020684811U CN 212205961 U CN212205961 U CN 212205961U
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- elastomer
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- loop configuration
- linkage segment
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Abstract
The utility model provides a resistance-type surface strain sensor. The utility model discloses an elastomer and two strain seats that are located the elastomer both sides, the elastomer is including being located middle loop configuration and being located the linkage segment of loop configuration both sides, just the line footpath of loop configuration part is less than the line footpath of linkage segment part, four foil gauges have been pasted on the semicircle that the inboard of loop configuration is located the linkage segment of one side, the foil gauge passes through the circuit connection cable, every strain seat on be provided with a fixed orifices, the linkage segment of the both sides of elastomer stretches into the both sides respectively strain seat in. The utility model discloses temperature compensation, output sensitivity height, linear can reach thousandth 5, stability is good, simple structure, installation convenient to use, repeatedly usable can be done to waterproof, full-bridge output.
Description
The technical field is as follows:
the utility model relates to a resistance-type surface strain sensor belongs to collection appearance technical field.
Background art:
the method is used for measuring the surface strain of various steel structures or concrete structures in the engineering fields of bridges, buildings, railways, traffic, hydropower, dams and the like, and measuring the linear deformation (strain) and stress of mounting points. In the prior art, a vibrating wire type surface (strain) meter is generally adopted, and the vibrating wire type surface (strain) meter is simple in structure, complex to install and fluctuated in measurement precision due to the influence of temperature.
The invention content is as follows:
the utility model aims at the problem that exists provides a resistance-type surface strain sensor, and temperature compensation, output sensitivity height, linear can be done to waterproof, full-bridge output, and can reach five per thousand, stability is good, simple structure, installation convenient to use, repeatedly usable well.
The above purpose is realized by the following technical scheme:
the utility model provides a resistance-type surface strain sensor, includes the elastomer and is located two strain seats of elastomer both sides, the elastomer is including being located middle loop configuration and being located the linkage segment of loop configuration both sides, just the line footpath of loop configuration part is less than the line footpath of linkage segment part, four foil gages have been pasted on the semicircle that the inboard of loop configuration is located the linkage segment of one side, the foil gage passes through the circuit connection cable, every strain seat on be provided with a fixed orifices, the linkage segment of the both sides of elastomer stretches into both sides respectively strain seat in.
The resistance-type surface strain sensor, both sides the seat of meeting an emergency between be provided with and be used for protecting the base of elastomer, the base on be provided with the upper cover, just the base with support through four stands between the upper cover, the height of stand is greater than the thickness of elastomer.
The resistance type surface strain sensor is characterized in that the elastic body is of a one-step forming structure.
The upper cover is arranged on the base through gel.
The cable is fixed on the strain seat on one side through a joint.
And a seal is arranged between the joint and the strain seat of the resistance type surface strain sensor.
Has the advantages that:
1. the utility model discloses a deformation unit adopts high elastic material, through one shot forming's processing form, selects again to use high accuracy resistance strain meter as sensing element, forms through technological preparation such as pasting bridging. It can be connected with static, static and dynamic strain data acquisition system, and can measure the strain value of tested structure surface by means of data acquisition system and its software function.
2. The utility model discloses temperature compensation can be done to waterproof, full-bridge output of structure, output sensitivity is high, linear can reach thousandth 5, stability is good, simple structure, installation convenient to use, repeatedly usable.
3. The utility model discloses can survey slight meeting an emergency, the strain is sensitive, and sensitivity is high, and the protection level can reach IP67, and simple to operate can survey dynamic strain, compares optic fibre strainometer, vibrating wire strain gauge and has the advantage.
Description of the drawings:
fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a plan view of the present invention with the upper cover removed.
Fig. 3 is a cross-sectional view of the present invention.
In the figure: 1. an elastomer; 11. an intermediate annular structure; 12. a connecting section; 2. a strain seat; 3. a strain gauge; 4. a cable; 5. a fixing hole; 6. a base; 7. an upper cover; 8. a column; 9. and (4) a joint.
The specific implementation mode is as follows:
example 1:
as shown in fig. 1-2: the resistance-type surface strain sensor of this embodiment includes elastomer 1 and two strain seats 2 that are located the elastomer both sides, the elastomer is including being located middle loop configuration 11 and being located the linkage segment 12 of loop configuration both sides, just the line footpath of loop configuration part is less than the line footpath of linkage segment part, four foil gage 3 have been pasted on the semicircle that the inboard of loop configuration is located the linkage segment of one side, the foil gage passes through circuit connection cable 4, every the strain seat on be provided with a fixed orifices 5 and be used for fixing this product on the object that awaits measuring, the linkage segment of the both sides of elastomer stretches into the both sides respectively the strain seat in.
Resistance-type surface strain sensor, both sides the seat of meeting an emergency between be provided with and be used for the protection the base 6 of elastomer, the base on be provided with upper cover 7, just the base with support through four stands 8 between the upper cover, the height of stand is greater than the thickness of elastomer, stand support has avoided upper cover and base to cause the contact to influence its measurement accuracy to the elastomer in the middle.
The resistance type surface strain sensor is characterized in that the elastic body is of a one-step forming structure.
The upper cover is arranged on the base through gel.
The cable of the resistance type surface strain sensor is fixed on the strain seat on one side through a joint 9.
And a seal is arranged between the joint and the strain seat of the resistance type surface strain sensor.
The working process is as follows: the deformation (such as strain change) of the measured surface leads the fixed blocks at the two ends to move relatively, so that the internal elastic element deforms, is sensed by the high-performance strain gauge adhered to the elastic element, and is acquired by a data acquisition instrument.
The sensitive element adopts a low-creep high-precision resistance strain gauge, and finally forms a full bridge output through strict pasting technology and moisture-proof sealing technical measures.
The elastic body is a high-flexibility structure, and the deformation of 1000 mu can be generated by applying 70N force to two ends. The measured object produces deformation, and the stress concentration is to the position of marking on figure 1, and 4 foil gages of mark position paste constitute wheatstone full-bridge can effectively increase sensitivity to reduce the influence of temperature. The elastomer is encapsulated by gel, so that the waterproof performance can be ensured, and the deformation of the elastomer is not influenced.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the technical means, but also comprises the technical scheme consisting of the equivalent replacement of the technical features. The present invention is not to be considered as the best thing, and belongs to the common general knowledge of the technicians in the field.
Claims (6)
1. A resistive surface strain sensor, characterized by: including the elastomer with be located two strain seats of elastomer both sides, the elastomer is including being located middle loop configuration and being located the linkage segment of loop configuration both sides, just the line footpath of loop configuration part is less than the line footpath of linkage segment part, four foil gauges have been pasted on the semicircle that the inboard linkage segment that is located one side of loop configuration, the foil gauge passes through the circuit connection cable, every strain seat on be provided with a fixed orifices, the linkage segment of the both sides of elastomer stretches into both sides respectively strain seat in.
2. The resistive surface strain sensor of claim 1, wherein: the base that is used for protecting the elastomer is arranged between the strain seats on both sides, the base on be provided with the upper cover, just the base with support through four stands between the upper cover, the height of stand is greater than the thickness of elastomer.
3. The resistive surface strain sensor of claim 1, wherein: the elastomer adopts a one-step forming structure.
4. The resistive surface strain sensor of claim 2, wherein: the upper cover is mounted on the base through gel.
5. The resistive surface strain sensor of claim 1, wherein: the cable is fixed on the strain seat on one side through a connector.
6. The resistive surface strain sensor of claim 5, wherein: and a seal is arranged between the joint and the strain seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020684811.9U CN212205961U (en) | 2020-04-29 | 2020-04-29 | Resistance type surface strain sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020684811.9U CN212205961U (en) | 2020-04-29 | 2020-04-29 | Resistance type surface strain sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212205961U true CN212205961U (en) | 2020-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020684811.9U Active CN212205961U (en) | 2020-04-29 | 2020-04-29 | Resistance type surface strain sensor |
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| Country | Link |
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| CN (1) | CN212205961U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199117A (en) * | 2021-12-09 | 2022-03-18 | 郭岳潘 | Digital bridge sensor |
-
2020
- 2020-04-29 CN CN202020684811.9U patent/CN212205961U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199117A (en) * | 2021-12-09 | 2022-03-18 | 郭岳潘 | Digital bridge sensor |
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