CN101571380A - Wide range fiber grating strain transducer - Google Patents
Wide range fiber grating strain transducer Download PDFInfo
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- CN101571380A CN101571380A CNA2009100626480A CN200910062648A CN101571380A CN 101571380 A CN101571380 A CN 101571380A CN A2009100626480 A CNA2009100626480 A CN A2009100626480A CN 200910062648 A CN200910062648 A CN 200910062648A CN 101571380 A CN101571380 A CN 101571380A
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- fiber grating
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- strain
- strain transducer
- planar spring
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Abstract
The invention provides a wide range fiber grating strain transducer. The transducer comprises a foil planar spring (1), wherein a fiber grating (2) is positioned in a groove (11) on the longitudinal axis of the planar spring (1); and two ends of the fiber grating (2) are fixed on corresponding positions of the planar spring (1). The wide range fiber grating strain transducer overcomes the defects of plastic deformation, yielding and even cracking easily happened to the prior strain transducer. The strain transducer of the invention can measure wide range strain (+/-2,500 mu epsilon) through adopting the structure of the planar spring; and through conversion effect of the structure, the strain directly acting on a base material can be effectively reduced, thereby improving the range of measurable strain of the transducer.
Description
Technical field
The invention belongs to field of sensing technologies, more particularly it is a kind of wide range fiber grating strain transducer.
Background technology
Fiber grating is to develop optical passive component very rapidly in recent years in fields such as optical fiber communication and Fibre Optical Sensors.Based on the strain transducer of fiber grating development, have highly sensitive, advantages such as volume is little, corrosion-resistant, anti-electromagnetic-radiation, can satisfy the measurement needs in abominable working environment such as civil engineering work, space flight, petroleum industry.Because its transducing signal directly is modulated to optical wavelength, thereby is not subjected to light intensity intensity fluctuation, junction loss and bending loss of optical fiber etc. to influence good stability, measuring accuracy height; In addition, but it has the characteristics of wavelength-division multiplex, and therefore a plurality of fiber gratings can be formed quasi-distributed sensor-based system, as long as adopt an optical cable, can realize the quasi-distributed measurement of a plurality of sensors.
When fiber grating is applied to strain measurement, need usually to adopt certain structure in advance fiber grating to be encapsulated, to guarantee the stable of each characterisitic parameter of sensor, also provide necessary protection simultaneously to relatively fragile fiber grating.At present, the packaged type of fiber Bragg grating strain sensor mainly contains substrate formula, embedded and tubular type encapsulation etc.These packaged types generally adopt metal material, have cheap, simple in structure, be easy to advantages such as installation.But there is defective in wide range strain (as ± 2500 μ ε) when measuring, be mainly reflected in: strain is that the base material that adopts by above packaged type passes to fiber grating, and the yield point σ of present common iron
sLimited (being about 200MPa), therefore the strain of institute's energy measurement also is limited (being about 1000 μ ε), when measured strain during greater than its yield limit, plastic yield, surrender and even fracture will take place in steel substrate, thereby strain transducer is destroyed, can't continue to finish measuring task, and select for use the material of high yield strength to raise the cost greatly.
Summary of the invention
The objective of the invention is to overcome above-mentioned existing disadvantages of background technology part, and a kind of wide range fiber grating strain transducer is provided.
The objective of the invention is to realize by following technical solution: wide range fiber grating strain transducer, it is characterized in that: it comprises the planar spring of a metal foil chip, be positioned at the fiber grating of stria on the planar spring longitudinal axis, the two ends of described fiber grating are fixed on the correspondence position of planar spring.
In technique scheme, described planar spring comprises the slab construction that is positioned at the middle part, be positioned at the ring plain spring at slab construction two ends, and be positioned at the canned paragraph at planar spring two ends, described slab construction, ring plain spring and canned paragraph are integral structure.
In technique scheme, the two ends of described fiber grating are by gluing or the form of fiber grating metallization back by spot welding be fixed on the planar spring correspondence position.
In technique scheme, the two ends of described ring plain spring are connected with canned paragraph with slab construction by the arc-shaped transition section.
In technique scheme, on the described canned paragraph mounting hole is arranged.
Wide range fiber grating strain transducer of the present invention is realized the measurement to wide range strain (± 2500 μ ε) by adopting the planar spring structure.By the transformation of structure, effectively reduce the strain that acts directly on the base material, can measure the scope of strain thereby improve sensor.
Description of drawings
Fig. 1 is the structural representation of wide range fiber grating strain transducer of the present invention.
1. planar springs among the figure, 2. fiber grating, 11. strias, 12. slab constructions, 13. ring plain springs, 14. canned paragraphs, 15. arc-shaped transition sections, 16. mounting holes, 17. fiber gratings of drawing, 18. gluing or spot welding.
Embodiment
Describe performance of the present invention in detail below in conjunction with accompanying drawing, but they do not constitute limitation of the invention, only do for example.More clearly understand easily by illustrating that advantage of the present invention will become simultaneously.
Consult Fig. 1 as can be known: the present invention is a kind of wide range fiber grating strain transducer, it comprises the planar spring 1 of a metal foil chip, be positioned at the fiber grating 2 of stria 11 on planar spring 1 longitudinal axis, the two ends of fiber grating 2 are fixed on the correspondence position of planar spring 1.
The mode of utilisation point weldering or by the mounting hole on the canned paragraph 14 16 the sensor two ends are fixed on measuring position during use with screw, the strain of structure is delivered on the ring plain spring 13 by point of fixity during work, because the distortion of ring plain spring 13 is bigger, therefore can effectively reduce the strain that acts on the metal material, by adjusting the size of ring plain spring 13, can change the strain amplitude of its energy measurement; The strain of fiber grating 4 is then consistent in this locational strain size with measured structure.
The size of planar spring is about 28mm (length of planar spring 1) * 8mm (width of slab construction 12) * 1mm (thickness of planar spring 1).
Need to prove: for the professional and technical personnel in affiliated field, under the prerequisite that does not change the principle of the invention, can also make some changes and distortion to the present invention, this belongs to protection scope of the present invention equally.
Claims (5)
1, wide range fiber grating strain transducer, it is characterized in that: it comprises the planar spring (1) of a metal foil chip, be positioned at the fiber grating (2) of stria (11) on planar spring (1) longitudinal axis, the two ends of described fiber grating (2) are fixed on the correspondence position of planar spring (1).
2, wide range fiber grating strain transducer according to claim 1, it is characterized in that described planar spring (1) comprises the slab construction (12) that is positioned at the middle part, be positioned at the ring plain spring (13) at slab construction (12) two ends, and being positioned at the canned paragraph (14) at planar spring (1) two ends, described slab construction (12), ring plain spring (13) and canned paragraph (14) they are integral structure.
3, wide range fiber grating strain transducer according to claim 1 is characterized in that the two ends of described fiber grating (2) are fixed on planar spring (1) correspondence position by gluing (18) or with the form of fiber grating (2) metallization back by spot welding.
4, wide range fiber grating strain transducer according to claim 2 is characterized in that the two ends of described ring plain spring (13) are connected with canned paragraph (14) with slab construction (12) by arc-shaped transition section (15).
5, wide range fiber grating strain transducer according to claim 2 is characterized in that mounting hole (16) is arranged on the described canned paragraph (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100626480A CN101571380B (en) | 2009-06-09 | 2009-06-09 | Wide range fiber grating strain transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100626480A CN101571380B (en) | 2009-06-09 | 2009-06-09 | Wide range fiber grating strain transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101571380A true CN101571380A (en) | 2009-11-04 |
| CN101571380B CN101571380B (en) | 2011-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100626480A Active CN101571380B (en) | 2009-06-09 | 2009-06-09 | Wide range fiber grating strain transducer |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853778A (en) * | 2012-08-06 | 2013-01-02 | 杭州珏光物联网科技有限公司 | Fiber grating strain sensor |
| CN102865827A (en) * | 2012-06-29 | 2013-01-09 | 杭州珏光物联网科技有限公司 | Fiber Bragg grating strain sensor |
| CN104019759A (en) * | 2014-06-17 | 2014-09-03 | 中国航空工业集团公司北京长城计量测试技术研究所 | Ultrahigh strain sensor based on fiber bragg grating |
| CN104279973A (en) * | 2014-09-26 | 2015-01-14 | 北京遥测技术研究所 | Wide-range fiber bragg grating strain sensor |
| CN104330032A (en) * | 2014-07-09 | 2015-02-04 | 国家电网公司 | Fiber displacement sensor, fiber displacement detection device and fiber for sensor |
| CN105806241A (en) * | 2015-01-20 | 2016-07-27 | 晋禾企业股份有限公司 | Optical fiber detection structure coated by self-pre-tensioned full spring |
| CN106289091A (en) * | 2016-10-21 | 2017-01-04 | 广东核电合营有限公司 | A kind of lightweight fiber grating wide range strain gauge being applicable to microcrack structure |
| CN106441387A (en) * | 2015-10-14 | 2017-02-22 | 北京信息科技大学 | High-sensitivity fiber grating sensor with sensitizing effect |
| CN106705877A (en) * | 2017-01-20 | 2017-05-24 | 武汉理工大学 | High-sensitivity fiber Bragg grating strain sensor based on flexible hinges |
| CN107449369A (en) * | 2017-09-15 | 2017-12-08 | 浙江智远光电科技有限公司 | Easy fiber grating energy storage welded type foil gauge is installed |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2550719Y (en) * | 2002-05-30 | 2003-05-14 | 欧进萍 | Optical fiber and grating sheet type package strainometer |
| CN1632488A (en) * | 2004-12-31 | 2005-06-29 | 武汉理工大学 | Anchor cable stress sensor for optical fiber grating dynamometer |
-
2009
- 2009-06-09 CN CN2009100626480A patent/CN101571380B/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865827A (en) * | 2012-06-29 | 2013-01-09 | 杭州珏光物联网科技有限公司 | Fiber Bragg grating strain sensor |
| CN102853778A (en) * | 2012-08-06 | 2013-01-02 | 杭州珏光物联网科技有限公司 | Fiber grating strain sensor |
| CN104019759A (en) * | 2014-06-17 | 2014-09-03 | 中国航空工业集团公司北京长城计量测试技术研究所 | Ultrahigh strain sensor based on fiber bragg grating |
| CN104330032A (en) * | 2014-07-09 | 2015-02-04 | 国家电网公司 | Fiber displacement sensor, fiber displacement detection device and fiber for sensor |
| CN104279973A (en) * | 2014-09-26 | 2015-01-14 | 北京遥测技术研究所 | Wide-range fiber bragg grating strain sensor |
| CN105806241B (en) * | 2015-01-20 | 2018-06-26 | 晋禾企业股份有限公司 | Optical fiber detection structure coated by self-pre-tensioned full spring |
| CN105806241A (en) * | 2015-01-20 | 2016-07-27 | 晋禾企业股份有限公司 | Optical fiber detection structure coated by self-pre-tensioned full spring |
| CN106441387A (en) * | 2015-10-14 | 2017-02-22 | 北京信息科技大学 | High-sensitivity fiber grating sensor with sensitizing effect |
| CN106441387B (en) * | 2015-10-14 | 2018-10-30 | 北京信息科技大学 | A kind of high-sensitivity optical fiber grating sensor with enhancement effect |
| CN106289091A (en) * | 2016-10-21 | 2017-01-04 | 广东核电合营有限公司 | A kind of lightweight fiber grating wide range strain gauge being applicable to microcrack structure |
| CN106705877A (en) * | 2017-01-20 | 2017-05-24 | 武汉理工大学 | High-sensitivity fiber Bragg grating strain sensor based on flexible hinges |
| CN106705877B (en) * | 2017-01-20 | 2019-05-24 | 武汉理工大学 | A kind of highly sensitive fiber Bragg grating strain sensor based on flexible hinge |
| CN107449369A (en) * | 2017-09-15 | 2017-12-08 | 浙江智远光电科技有限公司 | Easy fiber grating energy storage welded type foil gauge is installed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101571380B (en) | 2011-04-06 |
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