CN201149483Y - Optical fibre strain sensor - Google Patents
Optical fibre strain sensor Download PDFInfo
- Publication number
- CN201149483Y CN201149483Y CNU2008200784131U CN200820078413U CN201149483Y CN 201149483 Y CN201149483 Y CN 201149483Y CN U2008200784131 U CNU2008200784131 U CN U2008200784131U CN 200820078413 U CN200820078413 U CN 200820078413U CN 201149483 Y CN201149483 Y CN 201149483Y
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- CN
- China
- Prior art keywords
- strain
- flange
- sensor
- column
- fibre optic
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- Expired - Fee Related
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Abstract
The utility model discloses a fiber optic strain sensor comprising a base seat, an optical fiber, a strain-gauge bridge and a cover body, the strain-gauge bridge is fixedly arranged on the base seat, a groove is disposed on the lower surface of the strain-gauge bridge, the optical fiber is fixedly arranged in the groove, and the cover body covers on the base seat and closes the sensor. The strain-gauge bridge in the utility model is composed of two identical tapered sheets arranged symmetrically and a middle sheet, thereby the strain produced by the strain-gauge bridge in the measurement is an equal strain, and the precision of measurement is ensured.
Description
Technical field
The utility model relates to a kind of fibre optic strain sensor.
Background technology
In recent years, sensor is developing towards sensitive, accurate, strong, the small and exquisite and intelligentized direction of adaptability.Wherein, Fibre Optical Sensor has the performance of anti-electromagnetic interference (EMI) and atomic radiation, soft, the lightweight mechanical property of matter, insulation, inductionless electric property, water-fast, high temperature resistant, corrosion resistant chemical property etc., thus Fibre Optical Sensor is owing to the performance with multiple excellence develops rapidly.
Fibre Optical Sensor can be used for measuring multiple physical quantity, such as temperature, pressure, displacement, strain, acceleration etc., but strain deformation such as the deformation of member that pastes optical fiber in the present Fibre Optical Sensor often is not, thus make that error is big in measurement, can not satisfy the requirement of high measurement accuracy.
The utility model content
At the problem that prior art exists, the purpose of this utility model is to provide a kind of structure improved Fibre Optical Sensor.
For achieving the above object, a kind of fibre optic strain sensor of the utility model comprises base, optical fiber, strain bridge and lid, and strain bridge is fixedly installed on the base, and the lower surface of strain bridge is provided with groove, optical fiber is fixedly installed in this groove, and cover cap is contained on the base and sensor is airtight.
Further, described strain bridge is made up of two identical trapezoidal plates and a middle thin plate, and this two trapezoidal plate is symmetrical arranged, and this centre thin plate is fixedly installed in the middle of described two trapezoidal plates.
Further, be set with a column on the center of described middle thin plate, the upper end of this column is provided with helicitic texture.
Further, described trapezoidal plate is an isosceles trapezoidal structure, and the angle between its two waist is between 20 ° to 50 °.
Further, described lid comprises loam cake and top cover, and the upper surface of this loam cake is provided with a ring-like flange, and top cover lid is contained on the described annular flange flange, and the center of described annular flange flange is provided with through hole, and loam cake is located on the described column by described through hole.
Further, also be equipped with an annular flake on the described column, the inward flange of this annular flake is connected with described column is airtight, and its outward flange is connected with the inside surface of described annular flange flange is airtight.
Strain bridge is made up of thin plate in the middle of symmetrically arranged two identical trapezoidal plates and in the utility model, thus make measure in the strain that produces of strain bridge for etc. strain, the precision of the measurement of assurance.
Description of drawings
Fig. 1 is the utility model structure cut-open view;
Fig. 2 is for installing the vertical view of strain bridge rear base;
Fig. 3 is the loam cake front elevation;
Fig. 4 is a upper cover top view;
Fig. 5 is the front elevation of annular flake;
Fig. 6 is the vertical view of annular flake.
Embodiment
A kind of fibre optic strain sensor of the utility model comprises base 1, optical fiber 2, strain bridge 3 and lid 4, and strain bridge 3 is fixedly installed on the base 1, and lid 4 lids are contained in and make sensor integral body on the base 1 is a closed structure.Strain bridge 3 is made up of two identical trapezoidal plates 31 and a middle thin plate 32, trapezoidal plate 31 is an isosceles trapezoidal structure, middle thin plate 32 is a rectangle structure, two trapezoidal plates 31 are symmetrical arranged, angle between trapezoidal two waists of these isosceles is between 20 ° to 50 °, and middle thin plate 32 is fixedly installed in the middle of two trapezoidal plates 31; Length direction along strain bridge 3 lower surfaces is provided with a groove, and the opposite position with it of base 1 is provided with through hole 11, and optical fiber 2 is located in the hole 11 and is bonded in the groove; Also be set with a column 5 on the center of middle thin plate 32, the upper end of column 5 is threaded structure.
Lid 4 comprises loam cake 41 and top cover 42, and the upper surface of loam cake 41 is provided with a ring-like flange 411, and top cover 42 lid is contained on the annular flange flange 411, and the center of annular flange flange 411 is provided with through hole 412, and loam cake 41 is located on the column 5 by through hole 412.Also be equipped with an annular flake 6 on the column 5, the inward flange of annular flake 6 and column 5 airtight welding, the airtight welding of the inside surface of its outward flange and annular flange flange 411, thereby make 41 of column 5 and loam cakes be air-tight state, guaranteed the anti-interference of sensor, and annular flake 6 is the metallic membrane of good springiness, thereby it does not obstruct the motion of column 5 when being subjected to external force.
During work, column 5 is fixedlyed connected with a force-bearing base by the upper end screw thread, during to be measured generation strain, force-bearing base passes to strain on the strain bridge 3 by column 5, because strain bridge 3 is made up of symmetrically arranged two identical trapezoidal plates 31 and intermediate thin 32 plates, thereby the strain that strain bridge 3 produces in feasible the measurement is for waiting strain, when strain takes place in strain bridge 3, deformation also takes place in optical fiber 2 bonding on it, thereby to be measured strain is obtained reflection truly on optical fiber 2 length directions, thereby measure to be measured strain variation exactly.
Claims (6)
1, a kind of fibre optic strain sensor is characterized in that, this sensor comprises base, optical fiber, strain bridge and lid, strain bridge is fixedly installed on the base, the lower surface of strain bridge is provided with groove, and optical fiber is fixedly installed in this groove, and cover cap is contained on the base and sensor is airtight.
2, a kind of fibre optic strain sensor as claimed in claim 1, it is characterized in that, described strain bridge is made up of two identical trapezoidal plates and a middle thin plate, and this two trapezoidal plate is symmetrical arranged, and this centre thin plate is fixedly installed in the middle of described two trapezoidal plates.
3, a kind of fibre optic strain sensor as claimed in claim 1 is characterized in that, is set with a column on the center of described middle thin plate, and the upper end of this column is provided with helicitic texture.
4, a kind of fibre optic strain sensor as claimed in claim 1 is characterized in that, described trapezoidal plate is an isosceles trapezoidal structure, and the angle between its two waist is between 20 ° to 50 °.
5, a kind of fibre optic strain sensor as claimed in claim 1, it is characterized in that, described lid comprises loam cake and top cover, the upper surface of this loam cake is provided with a ring-like flange, the top cover lid is contained on the described annular flange flange, and the center of described annular flange flange is provided with through hole, and loam cake is located on the described column by described through hole.
6, a kind of fibre optic strain sensor as claimed in claim 1 is characterized in that, also is equipped with an annular flake on the described column, and the inward flange of this annular flake is connected with described column is airtight, and its outward flange is connected with the inside surface of described annular flange flange is airtight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200784131U CN201149483Y (en) | 2008-01-03 | 2008-01-03 | Optical fibre strain sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200784131U CN201149483Y (en) | 2008-01-03 | 2008-01-03 | Optical fibre strain sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201149483Y true CN201149483Y (en) | 2008-11-12 |
Family
ID=40117254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200784131U Expired - Fee Related CN201149483Y (en) | 2008-01-03 | 2008-01-03 | Optical fibre strain sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201149483Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943568A (en) * | 2009-06-10 | 2011-01-12 | 香港纺织及成衣研发中心 | Be used to detect the fiber strain sensor and the measuring system of big repeated deformation |
| CN102135458A (en) * | 2010-12-30 | 2011-07-27 | 浙江大学 | Strain beam type soil pressure sensor |
| CN103383246A (en) * | 2012-05-04 | 2013-11-06 | 电子科技大学 | High-sensitivity fiber Bragg grating strain sensor |
-
2008
- 2008-01-03 CN CNU2008200784131U patent/CN201149483Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943568A (en) * | 2009-06-10 | 2011-01-12 | 香港纺织及成衣研发中心 | Be used to detect the fiber strain sensor and the measuring system of big repeated deformation |
| CN101943568B (en) * | 2009-06-10 | 2012-06-27 | 香港纺织及成衣研发中心 | Fiber strain sensor and measurement system for repeated large deformation |
| CN102135458A (en) * | 2010-12-30 | 2011-07-27 | 浙江大学 | Strain beam type soil pressure sensor |
| CN103383246A (en) * | 2012-05-04 | 2013-11-06 | 电子科技大学 | High-sensitivity fiber Bragg grating strain sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081112 Termination date: 20120103 |