CN106918296A - A kind of fiber grating measurement apparatus strained for bridge cable with temperature monitoring - Google Patents
A kind of fiber grating measurement apparatus strained for bridge cable with temperature monitoring Download PDFInfo
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- CN106918296A CN106918296A CN201710180735.0A CN201710180735A CN106918296A CN 106918296 A CN106918296 A CN 106918296A CN 201710180735 A CN201710180735 A CN 201710180735A CN 106918296 A CN106918296 A CN 106918296A
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- fiber
- grating
- sensor
- bragg grating
- bridge cable
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- 239000000835 fiber Substances 0.000 title claims abstract description 45
- 238000012544 monitoring process Methods 0.000 title claims abstract description 16
- 238000005259 measurement Methods 0.000 title claims abstract description 14
- 239000013307 optical fiber Substances 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 9
- 230000008439 repair process Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of fiber grating measurement apparatus strained for bridge cable with temperature monitoring, including fiber-optic grating sensor, fiber Bragg grating (FBG) demodulator and computer host computer processing system, the fiber-optic grating sensor includes N number of sensor being fixed on bridge cable, and the sensor connects fiber Bragg grating (FBG) demodulator by optical fiber；The fiber Bragg grating (FBG) demodulator includes wideband light source, fiber coupler and the fiber Bragg grating signal processor being connected with fiber coupler, the wideband light source connects fiber coupler by optical fiber, the fiber Bragg grating signal processor is connected by netting twine with computer host computer processing system, measurement apparatus disclosed in this invention can effectively measure the state of bridge cable, the potential safety hazard of bridge can in advance be found, can in time repair, evade the generation of accident.
Description
Technical field
The invention belongs to fiber parametric amplification field, more particularly to a kind of light strained for bridge cable with temperature monitoring
Fine grating measuring device.
Background technology
The health status of real-time monitoring bridge is most important, can in advance find the potential safety hazard of bridge, can repair in time
Reason, evades the generation of accident.Bridge cable is the important component of bridge, is conventionally used to bridge cable health state-detection
Sensor also rests on the electronic sensor of point type, and this kind of sensor has certain limitation, and affected by environment larger, the longevity
Life is short, is unfavorable for the state of long term monitoring bridge cable.Replace electronic sensor using fiber-optic grating sensor, just in the absence of electricity
The shortcoming of sub- sensor, and certainty of measurement is also far above electronic sensor, can be with significantly more efficient measurement bridge cable
State.
The content of the invention
In order to solve the above technical problems, the invention provides a kind of optical fiber light strained for bridge cable with temperature monitoring
Grid measurement apparatus, to reach raising certainty of measurement, effectively monitor the purpose of bridge cable state.
To reach above-mentioned purpose, technical scheme is as follows：
A kind of fiber grating measurement apparatus strained for bridge cable with temperature monitoring, including fiber-optic grating sensor,
Fiber Bragg grating (FBG) demodulator and computer host computer processing system, the fiber-optic grating sensor include N number of being fixed on bridge cable
Sensor, the sensor connects fiber Bragg grating (FBG) demodulator by optical fiber；The fiber Bragg grating (FBG) demodulator include wideband light source,
Fiber coupler and the fiber Bragg grating signal processor being connected with fiber coupler, the wideband light source connect light by optical fiber
Fine coupler, the fiber Bragg grating signal processor is connected by netting twine with computer host computer processing system.
In such scheme, the fiber-optic grating sensor receives the reflection of measurand bridge cable by grating region
Ripple.
By above-mentioned technical proposal, the fiber grating provided by the present invention for bridge cable strain and temperature monitoring is measured
Device using the grating region of fiber-optic grating sensor is influenceed that the ripple by the reflected light of grating can be caused by measurand
Length is changed, and data processing is carried out by fiber Bragg grating (FBG) demodulator, and transferring data to upper computer software by netting twine is divided
Analysis, analyzes the change of the corresponding environmental factor of reflected light wavelength shift, and the physical quantity that can be measured has strain, temperature, vibration
Deng, realize to bridge cable strain and temperature real-time monitoring.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described.
Fig. 1 is that a kind of fiber grating for bridge cable strain and temperature monitoring disclosed in the embodiment of the present invention is measured
Principle of device schematic diagram.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described.
The invention provides a kind of fiber grating measurement apparatus strained for bridge cable with temperature monitoring, such as Fig. 1 institutes
Show, the measurement apparatus can effectively measure the state of bridge cable, can in advance find the potential safety hazard of bridge, can repair in time
Reason, evades the generation of accident.
It is as shown in Figure 1 for bridge cable strain and the fiber grating measurement apparatus of temperature monitoring, including fiber grating
Sensor, fiber Bragg grating (FBG) demodulator and computer host computer processing system, fiber-optic grating sensor are fixed on bridge cable including N number of
On sensor (No. 1 sensor, No. 2 sensor ... N sensors), sensor connects fiber Bragg grating (FBG) demodulator by optical fiber；
Fiber Bragg grating (FBG) demodulator includes wideband light source, fiber coupler and the fiber grating signal transacting being connected with fiber coupler
Device, wideband light source connects fiber coupler by optical fiber, and fiber Bragg grating signal processor is processed by netting twine with computer host computer
System is connected.
Fiber-optic grating sensor receives the back wave of bridge cable by grating region.
In figure, wideband light source provides the light source of wavelength in a certain limit, and fiber coupler is between optical fiber and optical fiber
The device of detachable (activity) connection is carried out, it is the accurate docking of two end faces optical fiber, so that launching fiber is exported
Light energy can be coupled to greatest extent in reception optical fiber, and make its intervention optical link so as to subtracting to the influence that system is caused
To minimum.Fiber-optic grating sensor is fixed on bridge cable, when the physical quantity such as strain, temperature of bridge cable changes,
Transfer to the fiber Bragg grating (FBG) demodulator to carry out data processing by the change of reflected light wavelength, then transferred data to by netting twine upper
Machine software is analyzed, and realizes the real-time monitoring to bridge cable strain and temperature.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The scope most wide for causing.
Claims (2)
1. it is a kind of for bridge cable strain and temperature monitoring fiber grating measurement apparatus, it is characterised in that including optical fiber light
Gate sensor, fiber Bragg grating (FBG) demodulator and computer host computer processing system, the fiber-optic grating sensor are fixed on bridge including N number of
Sensor on beam cable, the sensor connects fiber Bragg grating (FBG) demodulator by optical fiber；The fiber Bragg grating (FBG) demodulator includes
Wideband light source, fiber coupler and the fiber Bragg grating signal processor being connected with fiber coupler, the wideband light source pass through
Optical fiber connects fiber coupler, and the fiber Bragg grating signal processor is connected by netting twine with computer host computer processing system.
2. it is according to claim 1 it is a kind of for bridge cable strain and temperature monitoring fiber grating measurement apparatus, its
It is characterised by, the fiber-optic grating sensor receives the back wave of measurand bridge cable by grating region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710180735.0A CN106918296A (en) | 2017-03-23 | 2017-03-23 | A kind of fiber grating measurement apparatus strained for bridge cable with temperature monitoring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710180735.0A CN106918296A (en) | 2017-03-23 | 2017-03-23 | A kind of fiber grating measurement apparatus strained for bridge cable with temperature monitoring |
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| Publication Number | Publication Date |
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| CN106918296A true CN106918296A (en) | 2017-07-04 |
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| CN201710180735.0A Pending CN106918296A (en) | 2017-03-23 | 2017-03-23 | A kind of fiber grating measurement apparatus strained for bridge cable with temperature monitoring |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050941A (en) * | 2017-12-25 | 2018-05-18 | 西安工业大学 | A kind of CW with frequency modulation laser interference optical fiber displacement sensor and its displacement detecting method |
| CN110589686A (en) * | 2019-09-16 | 2019-12-20 | 江苏卓然智能重工有限公司 | Fatigue monitoring method for large tower crane cable based on FBG (fiber Bragg Grating) sensor |
| CN111238710A (en) * | 2020-01-13 | 2020-06-05 | 武汉理工大学 | Bridge cable force state monitoring device and monitoring method based on weak grating array |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201884024U (en) * | 2010-09-28 | 2011-06-29 | 北京品傲光电科技有限公司 | Fiber grating sensor-based system used for monitoring coalbed methane well |
| CN102269573A (en) * | 2011-05-03 | 2011-12-07 | 东华大学 | Quasi-distributed composite structure strain and temperature detection system |
| US20150268096A1 (en) * | 2012-10-23 | 2015-09-24 | Eric Udd | Fiber grating sensor system for measuring key parameters during high speed |
| CN105067360A (en) * | 2015-07-28 | 2015-11-18 | 中国运载火箭技术研究院 | Composite material structure health monitoring system based on embedded optical fiber grating |
-
2017
- 2017-03-23 CN CN201710180735.0A patent/CN106918296A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201884024U (en) * | 2010-09-28 | 2011-06-29 | 北京品傲光电科技有限公司 | Fiber grating sensor-based system used for monitoring coalbed methane well |
| CN102269573A (en) * | 2011-05-03 | 2011-12-07 | 东华大学 | Quasi-distributed composite structure strain and temperature detection system |
| US20150268096A1 (en) * | 2012-10-23 | 2015-09-24 | Eric Udd | Fiber grating sensor system for measuring key parameters during high speed |
| CN105067360A (en) * | 2015-07-28 | 2015-11-18 | 中国运载火箭技术研究院 | Composite material structure health monitoring system based on embedded optical fiber grating |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050941A (en) * | 2017-12-25 | 2018-05-18 | 西安工业大学 | A kind of CW with frequency modulation laser interference optical fiber displacement sensor and its displacement detecting method |
| CN110589686A (en) * | 2019-09-16 | 2019-12-20 | 江苏卓然智能重工有限公司 | Fatigue monitoring method for large tower crane cable based on FBG (fiber Bragg Grating) sensor |
| CN111238710A (en) * | 2020-01-13 | 2020-06-05 | 武汉理工大学 | Bridge cable force state monitoring device and monitoring method based on weak grating array |
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Application publication date: 20170704 |