CN100578143C - Optical fibre displacement transducer - Google Patents
Optical fibre displacement transducer Download PDFInfo
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- CN100578143C CN100578143C CN200810061898A CN200810061898A CN100578143C CN 100578143 C CN100578143 C CN 100578143C CN 200810061898 A CN200810061898 A CN 200810061898A CN 200810061898 A CN200810061898 A CN 200810061898A CN 100578143 C CN100578143 C CN 100578143C
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- fiber grating
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- housing
- connecting link
- cushion block
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 25
- 239000013307 optical fiber Substances 0.000 title claims description 10
- 239000000835 fiber Substances 0.000 claims abstract description 33
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000005672 electromagnetic field Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000008376 long-term health Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention discloses a fiber grating displacement sensor which comprises a shell, fiber gratings, an equal-strength beam and a measurement probing rod. One end of the measurement probing rod extends into the shell, the shell is provided with a wedge block, a connecting rod and a cushion block, wherein the measurement probing rod is in fixed connection with the cushion block, the cushion block is provided with a cavity, the length of the connecting rod is larger than the length of the cavity, one end of the connecting rod is fixed on the shell, the other end of the connecting rod extends to the cavity, a pulling spring whose aperture is large than the width of the cavity is arranged on the connecting rod, one end of the equal-strength beam is fixed on the cushion block, the other end of the equal-strength beam is connected with a supporting rod, one end of the supporting rod is held against the oblique plane of the wedge block, the fiber gratings are boned on the upper and the lower surfaces of the equal-strength beam in symmetry, the fiber gratings are connected with tail fibers, one end of each tail fiber extends out of the shell. The characteristics of the fiber grating displacement sensor are that the fiber gratings are used to carry out displacement detection, prevents electromagnetic interference, is good in durability and high in measurement precision; the symmetrical bonding of the fiber gratings on the upper and the lower surfaces of the equal-strength beam eliminates the measurement error which may be caused due to temperature change.
Description
Technical field
The present invention relates to a kind of detecting sensor, especially relate to a kind of fiber grating displacement sensor.
Background technology
In civil engineering work, monitoring structural health conditions (SHM) has great importance to the long-term safety operation that guarantees structure, and displacement detecting is one of measurement project the most basic in the measuring technique, is the basis (as: vibration, displacement, strain, acceleration etc.) of multiple physical quantity.Displacement detecting can adopt displacement transducer (being used for measuring a kind of sensor of engineering structure distortion), and it can provide data necessary to monitoring structural health conditions.Traditional displacement transducer is the resistance-strain chip, and this displacement transducer permanance is relatively poor, be subject to that strong-electromagnetic field disturbs, quantity of information is limited, and the result of secular strain test understands serious distortion, can not satisfy the requirement of civil engineering structure long-term health monitoring.
Summary of the invention
Technical matters to be solved by this invention provides that a kind of endurance quality is good, measuring accuracy is high, and fiber grating displacement sensor simple in structure, that be not subjected to the interference of electromagnetic field.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of fiber grating displacement sensor, this sensor comprises housing, fiber grating, the beam of uniform strength and measurement feeler lever, one end of described measurement feeler lever passes the through hole that is arranged on the described housing and stretches in the described housing, be provided with voussoir in the described housing, connecting link and cushion block, an end that is positioned at described housing of described measurement feeler lever is fixedlyed connected with described voussoir, the described measurement feeler lever in described voussoir upper edge axially be provided with cavity with opening, the length of described connecting link is greater than the length of described cavity, one end of described connecting link is fixedly connected on the described housing, the other end of described connecting link stretches in the described cavity, described connecting link is provided with extension spring, the aperture of described extension spring is greater than the width of described cavity, one end of the described beam of uniform strength is fixedly connected on the described cushion block, the other end of the described beam of uniform strength is connected with pole, one end apical grafting of described pole is on the inclined-plane of described voussoir, described fiber grating symmetry sticks on the upper and lower surface of the described beam of uniform strength, be connected with tail optical fiber on the described fiber grating, one end of described tail optical fiber sticks on the surface of the described beam of uniform strength, and the other end of described tail optical fiber stretches out outside the housing.
One end of the described beam of uniform strength is fixedlyed connected with described cushion block by screw.
One end of described measurement feeler lever is fixedlyed connected with described voussoir by screw thread.
One end of described connecting link is fixedlyed connected with described housing by screw thread.
Compared with prior art, the invention has the advantages that and utilize fiber grating to carry out displacement detecting, fiber grating is a kind of strain sensor of function admirable, its antijamming capability is strong, is not subjected to the interference of electromagnetic field, does not also influence external electromagnetic field, electrical insulation capability is good, good endurance, measure highly sensitive, measuring accuracy is high, can realize point measurement and distributed measurement; The fiber grating symmetry sticks on the upper and lower surface of the beam of uniform strength, has eliminated the measuring error of being brought by temperature variation effectively; In addition, the present invention is simple in structure, explosion-proof is good, is not subjected to the interference of electromagnetic field, can be widely used in the displacement detecting of abominable working environment such as civil engineering work, petrochemical complex.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As shown in the figure, a kind of fiber grating displacement sensor, this sensor comprises housing 1, fiber grating 2, the beam of uniform strength 3 and measurement feeler lever 4, an end of measuring feeler lever 4 passes the through hole 11 that is arranged on the housing 1 and stretches in the housing 1, be provided with voussoir 5 in the described housing 1, connecting link 6 and cushion block 7, an end that is positioned at housing 1 of measuring feeler lever 4 is fixedlyed connected with voussoir 5 by screw thread, what feeler lever 4 was measured in voussoir 5 upper edges axially is provided with the cavity 51 with opening, the length of connecting link 6 is greater than the length of cavity 51, the width of connecting link 6 is slightly less than the width of cavity 51, one end of connecting link 6 is fixedly connected on the housing 1 by screw thread, the other end of connecting link 6 stretches in the cavity 51, connecting link 6 is provided with extension spring 8, the aperture of extension spring 8 is greater than the width of cavity 51, one end of the beam of uniform strength 3 is fixedly connected on the cushion block 7 by screw, and the other end of the beam of uniform strength 3 is connected with pole 9, and an end apical grafting of pole 9 is on the inclined-plane of voussoir 5; Fiber grating 2 symmetries stick on the upper and lower surface of the beam of uniform strength 3, can eliminate the measuring error that temperature variation is brought; Be connected with tail optical fiber 21 on the fiber grating 2, an end of tail optical fiber 21 sticks on the surface of the beam of uniform strength 3, and the other end of tail optical fiber 21 stretches out outside the housing 1.
Principle of work of the present invention is: when certain displacement of measuring feeler lever 4 perception outsides and during pressurized, measuring feeler lever 4 promotion voussoirs 5 advances, and extension spring 8 pressurizeds that are arranged on the connecting link 6 compress, connecting link 6 constantly stretches in the cavity 51, the pole 9 of apical grafting on the inclined-plane of voussoir 5 moved relative to past eminence on the inclined-plane, at this moment, 9 pairs of beam of uniform strengths 3 of pole apply displacement and make the beam of uniform strength 3 produce crooked and be out of shape, the symmetry fiber grating 2 that sticks on the upper and lower surface of the beam of uniform strength 3 will produce cooperative transformation with the surface of the beam of uniform strength 3 like this, make the centre wavelength skew certain of fiber grating 2 owing to strain produces, can draw the centre wavelength of fiber grating 2 and the relation between the displacement by analyzing, thereby realize detection displacement.
Claims (4)
1, a kind of fiber grating displacement sensor, this sensor comprises housing, fiber grating, the beam of uniform strength and measurement feeler lever, one end of described measurement feeler lever passes the through hole that is arranged on the described housing and stretches in the described housing, it is characterized in that being provided with voussoir in the described housing, connecting link and cushion block, an end that is positioned at described housing of described measurement feeler lever is fixedlyed connected with described voussoir, the described measurement feeler lever in described voussoir upper edge axially be provided with cavity with opening, the length of described connecting link is greater than the length of described cavity, one end of described connecting link is fixedly connected on the described housing, the other end of described connecting link stretches in the described cavity, described connecting link is provided with extension spring, the aperture of described extension spring is greater than the width of described cavity, one end of the described beam of uniform strength is fixedly connected on the described cushion block, the other end of the described beam of uniform strength is connected with pole, one end apical grafting of described pole is on the inclined-plane of described voussoir, described fiber grating symmetry sticks on the upper and lower surface of the described beam of uniform strength, be connected with tail optical fiber on the described fiber grating, one end of described tail optical fiber sticks on the surface of the described beam of uniform strength, and the other end of described tail optical fiber stretches out outside the housing.
2, a kind of fiber grating displacement sensor according to claim 1 is characterized in that an end of the described beam of uniform strength is fixedlyed connected with described cushion block by screw.
3, a kind of fiber grating displacement sensor according to claim 1 is characterized in that an end of described measurement feeler lever is fixedlyed connected with described voussoir by screw thread.
4, a kind of fiber grating displacement sensor according to claim 1 is characterized in that an end of described connecting link is fixedlyed connected with described housing by screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810061898A CN100578143C (en) | 2008-05-23 | 2008-05-23 | Optical fibre displacement transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810061898A CN100578143C (en) | 2008-05-23 | 2008-05-23 | Optical fibre displacement transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101290214A CN101290214A (en) | 2008-10-22 |
| CN100578143C true CN100578143C (en) | 2010-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810061898A Active CN100578143C (en) | 2008-05-23 | 2008-05-23 | Optical fibre displacement transducer |
Country Status (1)
| Country | Link |
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| CN (1) | CN100578143C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567378A (en) * | 2019-09-04 | 2019-12-13 | 中南大学 | optical fiber displacement sensor and measuring method thereof |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749035B (en) * | 2012-06-29 | 2015-04-15 | 浙江睿思特智能科技有限公司 | Optical-fiber grating displacement transducer and sensing method |
| CN103913125B (en) * | 2012-12-28 | 2017-05-17 | 同方威视技术股份有限公司 | Protective net monitoring system |
| CN104792267B (en) * | 2014-01-21 | 2018-06-22 | 周峰 | Fiber grating displacement sensor |
| CN103759659B (en) * | 2014-01-27 | 2016-04-13 | 山东微感光电子有限公司 | A kind of fiber grating displacement sensor carrying out multimetering |
| CN105841619A (en) * | 2016-03-18 | 2016-08-10 | 沈阳建筑大学 | Wide range fiber grating displacement sensor capable of adjusting measuring range and precision |
| CN105651186A (en) * | 2016-03-18 | 2016-06-08 | 沈阳建筑大学 | Fiber bragg grating displacement sensor |
| CN106863015B (en) * | 2017-02-24 | 2018-11-23 | 武汉理工大学 | A kind of fiber grating micro-displacement sensor and the machine pillar with the sensor |
| CN106767689A (en) * | 2017-03-06 | 2017-05-31 | 沈阳建筑大学 | A kind of wedge structure fiber grating dislocation meter |
| CN106643918A (en) * | 2017-03-15 | 2017-05-10 | 中国科学院武汉岩土力学研究所 | Integrated test device for stress and displacement of rock mass based on fiber bragg grating and system |
| CN110186355A (en) * | 2019-04-30 | 2019-08-30 | 江汉大学 | Gap round the auto door measures tooling |
| CN110542385B (en) * | 2019-10-10 | 2023-04-07 | 深圳市基础工程有限公司 | Symmetrical wide-range fiber grating displacement sensor |
| CN111678448A (en) * | 2020-06-17 | 2020-09-18 | 江苏南水科技有限公司 | Miniaturized pop-up fiber bragg grating joint meter and packaging method |
| CN113030017B (en) * | 2021-03-04 | 2022-06-28 | 燕山大学 | Equal-strength beam type fiber bragg grating metal surface corrosion monitoring device |
| CN115342733A (en) * | 2022-07-28 | 2022-11-15 | 武汉理工大学 | Displacement sensor based on fiber bragg grating and measuring method |
-
2008
- 2008-05-23 CN CN200810061898A patent/CN100578143C/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567378A (en) * | 2019-09-04 | 2019-12-13 | 中南大学 | optical fiber displacement sensor and measuring method thereof |
| CN110567378B (en) * | 2019-09-04 | 2020-08-14 | 中南大学 | Optical fiber displacement sensor and measuring method thereof |
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| Publication number | Publication date |
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| CN101290214A (en) | 2008-10-22 |
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Free format text: CORRECT: ADDRESS; FROM: 315177 SHANSHAN TECHNOLOGY INNOVATION BASE, YINXIAN AVENUE, NINGBO CITY, ZHEJIANG PROVINCE TO: 315176 NO. 1, SHANSHAN ROAD, WANGCHUN INDUSTRIAL PARK, NINGBO CITY, ZHEJIANG PROVINCE |
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Effective date of registration: 20101216 Address after: 315176 Zhejiang city of Ningbo Province Wang Shanshan Lu Chun Industrial Park No. 1 Co-patentee after: Jiangxi Transportation Research Institute Patentee after: NingBo ShanGong Center of Structural Monitoring & Control Engineering Co.,Ltd. Address before: 315177 Zhejiang city of Ningbo province Ningbo Shanshan Yinxian Avenue branch base Patentee before: NingBo ShanGong Center of Structural Monitoring & Control Engineering Co.,Ltd. |
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Address after: 315176 Zhejiang city of Ningbo Province Wang Shanshan Lu Chun Industrial Park No. 1 Patentee after: NINGBO SHANGONG INTELLIGENT SECURITY TECHNOLOGY CO.,LTD. Patentee after: Jiangxi Transportation Research Institute Address before: 315176 Zhejiang city of Ningbo Province Wang Shanshan Lu Chun Industrial Park No. 1 Patentee before: NingBo ShanGong Center of Structural Monitoring & Control Engineering Co.,Ltd. Patentee before: Jiangxi Transportation Research Institute |
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Address after: 315176 No. 1, Shanshan Road, Wangchun Industrial Park, Ningbo, Zhejiang Patentee after: Zhejiang Shangong Intelligent Technology Co.,Ltd. Patentee after: Jiangxi Transportation Research Institute Address before: 315176 No. 1, Shanshan Road, Wangchun Industrial Park, Ningbo, Zhejiang Patentee before: NINGBO SHANGONG INTELLIGENT SECURITY TECHNOLOGY CO.,LTD. Patentee before: Jiangxi Transportation Research Institute |
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