CN108007371A - A kind of multi-direction deformation monitoring method of structure and system - Google Patents
A kind of multi-direction deformation monitoring method of structure and system Download PDFInfo
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- CN108007371A CN108007371A CN201711095842.XA CN201711095842A CN108007371A CN 108007371 A CN108007371 A CN 108007371A CN 201711095842 A CN201711095842 A CN 201711095842A CN 108007371 A CN108007371 A CN 108007371A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 11
- 230000003287 optical effect Effects 0.000 claims abstract description 139
- 238000001514 detection method Methods 0.000 claims abstract description 50
- 239000013307 optical fiber Substances 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 19
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract 2
- 238000003909 pattern recognition Methods 0.000 claims description 10
- 230000037361 pathway Effects 0.000 claims description 8
- 239000000523 sample Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims 1
- 239000012467 final product Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction 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
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- Length Measuring Devices By Optical Means (AREA)
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Abstract
A kind of multi-direction deformation monitoring system of structure based on distributed optical fiber stress measurement, including distribution type fiber-optic Detection location instrument (1), stress mornitoring optical cable (2), optical cable fixture (3) and tractor (4), the stress mornitoring optical cable installed on the distribution type fiber-optic Detection location instrument connection structure, carries out the multidirectional deformed state of structure to monitor and protect in real time；The distribution type fiber-optic Detection location instrument is acquired by the strain to detecting and temperature signal, after conversion processing, and the strain variation of stress detection light cable is monitored in real time.Stress detection light cable is laid by tractor (4) and optical cable fixture (fixator), so that stress mornitoring optical cable is laid in length direction and with angle of the length direction into 90 ± 15 °, when structure occurs, along during the deformation in the path length direction of stress mornitoring fiber cable laying or vertical light cable diameter road direction, to be responsible for the shape of optical cable axial direction.
Description
Technical field
The present invention relates to deformation monitoring technical field, it is particularly a kind of based on distributed optical fiber stress measurement to structure
Deformation be monitored technology.
Background technology
In terms of the deformation monitoring in structure (including building, bridge, tunnel etc.), the sensing technology for having multiclass is surveyed
Amount, includes stress section, slit gauge, fiber grating etc..Meanwhile Distributed Optical Fiber Sensing Techniques, such as Brillouin light domain reflectometer
Stress sensing system, the deformation of structure can be also monitored.
Brillouin light domain reflectometer is a kind of new distribution type optical fiber sensing technology based on Brillouin scattering, and having can
Measure high multiple physical parameters (such as temperature, strain and line loss), spatial resolution, distance sensing length, high certainty of measurement
The advantages that, can be to remotely being monitored along the temperature in the range of fibre circuit and strain variation.This distributing optical fiber sensing
Device is in terms of many large scale structures, such as health detection of pipeline, off-shore oil rig, oil well, dykes and dams, bridge, tunnel, cable
Extensive concern is obtained.But it is not high to the lateral deformation precision of optical cable due to only sensitive to the axial deformation of optical cable, according to several
What relation, strain variation value caused by the lateral deformation 1mm of 1m optical cables is only the strain variation value of an equal amount of axial deformation
2 ‰.
In actual application, there are a large amount of multidirectional high-precision deformation monitoring demands, therefore, realize to lateral shape
Become and carry out high-precision measurement, be of great significance to the deformation monitoring of structure.
The content of the invention
It is an object of the present invention to propose a kind of multi-direction deformation monitoring of structure based on distributed optical fiber stress measurement
System, overcomes the lateral deformation of optical cable to be difficult to the problem of high precision monitor, there is provided a kind of shape based on distributed optical fiber stress measurement
The method and apparatus of change.Using distribution type fiber-optic Detection location technology, the stress monitoring light being laid on structure is monitored in real time
The stress variation of cable, realizes and carries out comprehensive real time monitoring and early warning to the multi-direction deformed state of structure, there is provided structure
The data and change curve of stress suffered by body stress detection optical cable.
The technical solution of the present invention：A kind of multi-direction deformation monitoring of structure based on distributed optical fiber stress measurement
Method, carries out stress mornitoring to the optical cable being laid on structure, is drawn by optical cable fixture (fixator) and optical cable by optical cable
On structure (5), and it is the laying of tensioning (having stress), optical cable is applied by traction and optical cable fixture (fixator)
If so that optical cable length direction and with length direction have a certain degree (such as 90 ± 15 °) laid that (optical cable is in structure
90 ± 15 ° of steerings), when structure occurs, along during the deformation in optical cable pathway length direction or vertical light cable diameter road direction, can draw
Play the deformation of optical cable axial direction.
Optical cable is continuously laid in length direction and with length direction into 90 ± 15 ° of angles, and optical fiber is angled curved
The U-shaped OR gate types of Qu Shicheng, or at an angle.
A kind of multi-direction deformation monitoring system of structure based on distributed optical fiber stress measurement, its composition include distribution
Fiber-optic probe position indicator (1), stress mornitoring optical cable (2), optical cable fixture (3) and tractor (4), as shown in Figure 1；Distributed light
Fine Detection location instrument, connects the stress mornitoring optical cable installed on the structure, to the multidirectional deformed state of structure into
Row monitoring in real time and protection；The distribution type fiber-optic Detection location instrument is by being acquired the signal detected, converting
After processing, the strain variation of stress detection light cable can be monitored in real time.It is (fixed by tractor (4) and optical cable fixture
Device) to fiber cable laying so that optical cable length direction and with length direction have a certain degree (such as 90 ± 15 °) laid
(optical cable structure 90 ± 15 ° steering), when structure occurs along optical cable pathway length direction or vertical light cable diameter road direction
During deformation, the deformation of optical cable axial direction is responsible for.
The stress mornitoring optical cable, is installed on structure (5) by optical cable fixture and tractor, passes through tractor
(4) laying (optical cable is in 90 ± 15 ° of steerings of structure) in vertical 90 ± 15 ° of optical cable raw footage direction is carried out to optical cable, works as knot
Structure body occurs, along during the deformation in optical cable pathway principal direction or vertical light cable diameter road direction, to be responsible for the deformation of optical cable axial direction.
Distribution type fiber-optic Detection location instrument, connects the stress mornitoring optical cable installed on the structure, more to structure
The deformed state in direction monitor and protect in real time；The distribution type fiber-optic Detection location instrument passes through the signal to detecting
After the processing such as being acquired, converting, the strain variation of stress detection light cable can be monitored in real time.
The distribution type fiber-optic Detection location instrument includes the distributed light of Brillouin scattering (or Rayleigh scattering etc. also can)
Fine temperature and strain transducer, detecting instrument, pattern recognition unit, stress mornitoring optical cable are laid on structure, structure hair
Raw deformation, the tensioning of stress mornitoring optical cable, stress suffered by stress mornitoring optical cable increase；Stress mornitoring length direction and with length side
Stress variation suffered by the optical cable laid to (such as 90 ± 15 °) angle that has a certain degree is provided by brillouin scattering signal,
And pass through pattern recognition unit signal processing, obtain optical cable all sites suffered stress, stress variation in real time, stress variation position
The information such as put, that is, obtain stress, stress variation suffered by the structure upper stress detection optical cable of some space or time interval, stress
The information such as change location；After distribution type fiber-optic Detection location instrument carries out comprehensive analysis processing to stress detection light cable stress information,
The judgement to structure deformed state is formed, exports stress mornitoring optical cable deformation signal.Can use optical cable fixture (fixator) and
Optical cable tractor is tensioned optical cable.Optical cable reaches linear tensioning state, has certain stress more preferable.
Beneficial effects of the present invention：
1st, the present invention use Distributed Optical Fiber Sensing Techniques, with both it is wired it is seamless merge, distance, coverage
Greatly, distributed monitoring, no leak source.
2nd, the present invention passes principle based on distribution type fiber-optic, strong with anti-electromagnetic interference capability, Noninvasive, high sensitivity；
Corrosion-resistant, explosion-proof, light path has flexibility, easy to the advantage such as be connected with fibre system.
3rd, sensing technology of the system based on optical fiber is monitored, is powered without scene, security, reliability are high, anti-lightning, maintenance
Cost is low.
4th, optical cable is turned to using tractor, realizes multi-direction deformation monitoring, it is simple in structure.
5th, the detecting system includes distribution type fiber-optic Detection location instrument, stress mornitoring optical cable, optical cable fixture and tractor.
Using optical cable tractor, mount stress detects optical cable on structure to be measured, and distribution type fiber-optic Detection location instrument is to the more of structure
Direction deformation is monitored in real time.The present invention can carry out the isostructural safe condition of building structure such as concrete, girder steel
Monitoring, the deformation to all directions can synchronize monitoring in real time.
Brief description of the drawings
Fig. 1 is the system architecture diagram of the multi-direction deformation monitoring technology of structure of the present invention；
Fig. 2 is the system specific embodiment of the multi-direction deformation monitoring technology of structure of the present invention.
Embodiment
With reference to embodiment and attached drawing, the invention will be further described, but the protection model of the present invention should not be limited with this
Enclose.
A kind of multi-direction deformation monitoring system of structure based on distributed optical fiber stress measurement, its composition include distribution
Fiber-optic probe position indicator (1), stress mornitoring optical cable (2), optical cable fixture (3) and tractor (4), the stress mornitoring optical cable,
It is installed on by optical cable fixture and tractor on detected structure (5), 90 ° of steerings carries out optical cable by tractor (4),
When structure occurs, along during the deformation in optical cable pathway principal direction or vertical light cable diameter road direction, to be responsible for the shape of optical cable axial direction
Become.
Distribution type fiber-optic Detection location instrument, connects the stress mornitoring optical cable installed on the structure, more to structure
The deformed state in direction monitor and protect in real time；The distribution type fiber-optic Detection location instrument passes through the signal to detecting
After the processing such as being acquired, converting, the strain variation of stress detection light cable can be monitored in real time.
Distributed fiber optic temperature and strain transducer of the distribution type fiber-optic Detection location instrument including Brillouin scattering,
Detecting instrument, pattern recognition unit, stress mornitoring optical cable are laid on structure, and structure deforms upon, stress mornitoring optical cable
Tensioning, stress suffered by stress mornitoring optical cable increase；Stress variation suffered by stress mornitoring optical cable is provided by brillouin scattering signal, and
And pass through pattern recognition unit signal processing, the optical cable information such as suffered stress, stress variation, stress variation position in real time is obtained,
Obtain stress, stress variation suffered by the structure upper stress detection optical cable of some space or time interval, stress variation position
Etc. information；After distribution type fiber-optic Detection location instrument carries out comprehensive analysis processing to stress detection light cable stress information, formed to knot
The judgement of structure body deformed state, exports deformation signal.
The stress mornitoring optical cable, is installed on structure by optical cable fixture and tractor, by tractor to light
Cable carries out 90 ° of steerings, when structure occurs, along during the deformation in optical cable pathway principal direction or vertical light cable diameter road direction, to be responsible for
The deformation of optical cable axial direction.
Distribution type fiber-optic Detection location instrument, connects the stress mornitoring optical cable installed on the structure, more to structure
The deformed state in direction monitor and protect in real time；The distribution type fiber-optic Detection location instrument passes through the signal to detecting
After the processing such as being acquired, converting, the strain variation of stress detection light cable can be monitored in real time.
Distributed fiber optic temperature and strain transducer of the distribution type fiber-optic Detection location instrument including Brillouin scattering,
Detecting instrument, pattern recognition unit, stress mornitoring optical cable are laid on structure, and structure deforms upon, stress mornitoring optical cable
Tensioning, stress suffered by stress mornitoring optical cable increase；Stress variation suffered by stress mornitoring optical cable is provided by brillouin scattering signal, and
And pass through pattern recognition unit signal processing, the optical cable information such as suffered stress, stress variation, stress variation position in real time is obtained,
Obtain stress, stress variation suffered by the structure upper stress detection optical cable of some space or time interval, stress variation position
Etc. information；After distribution type fiber-optic Detection location instrument carries out comprehensive analysis processing to stress detection light cable stress information, formed to knot
The judgement of structure body deformed state, exports deformation signal.
Using optical cable fixture and tractor, the multi-direction deformation of structure is converted into the axial deformation of optical cable, improves inspection
Survey precision.
With reference to Fig. 1-2, Fig. 2 is structure lateral deformation monitoring technology knot of the present invention based on distributed optical fiber stress measurement
Structure block diagram.From Figure 2 it can be seen that the present invention is based on Distributed Optical Fiber Sensing Techniques, it forms the distribution included for stress mornitoring
The optical cable (6) of fiber-optic probe position indicator (1) and signal transmission, and stress mornitoring optical cable (2) on structure (5),
Optical cable fixture (31,32) and tractor (41,42,43,44)；The main body of tractor has the structure of fixed pulley.
Distributed fiber optic temperature and strain transducer of the distribution type fiber-optic Detection location instrument including Brillouin scattering,
Detecting instrument, pattern recognition unit, stress mornitoring optical cable on structure (5) are laid, and optical cable is utilized optical cable fixture (31,32)
It is fixed on structure, while tractor (41,42,43,44) is installed on structure optical cable is turned to, when structure is sent out
When raw either vertically or horizontally the displacement or deformation in direction, optical cable stretching or contraction distortion can be caused.Optical cable is tensioned, and optical cable is suffered should
Power increases；Stress is provided by brillouin scattering signal suffered by optical cable, and passes through pattern recognition unit signal processing, obtains optical cable
The suffered information such as stress, stress variation, stress variation position in real time, distribution type fiber-optic Detection location instrument to optical cable stress information into
After row comprehensive analysis processing, the judgement to structure deformed state is formed, forms warning information.
If the cable length in structure a length of 10m, Fig. 1 between horizontal stationary fixture (2) and vertically-guided fixture (6) is about
For 5m, when this section of optical cable deformation quantity is X (mm), corresponding fibre strain value is X/5000*10^6 ≈ 200*X (μ ε).
When structure deforms upon vertical deformation, horizontally-guided fixture (4) and vertically-guided fixture (6) vertical direction
Distance increase, if its protuberance causes optical cable to stretch 1mm, about 200 μ ε of corresponding strain value.Horizontally-guided fixture (4) and vertically-guided
Fixture (6) can use various devices, include the metal optical fiber sensing fixture of Suzhou south intelligence sensing Co., Ltd.
When structure occurs, to during horizontal direction deformation, equally to cause optical cable to deform upon, transverse shifting 1mm corresponds to strain
It is worth about 200 μ ε.
Above technical scheme can realize a kind of the real-time of structure deformed state based on distributed optical fiber stress monitoring
Monitoring method.Although it describe in detail the present invention with reference to above-mentioned specific embodiment, it should be appreciated that the present invention is not limited to
Disclosed embodiment and embodiment, for this professional domain technical staff, can carry out its form and details various
Change.It should be understood that the foregoing is merely the instantiation of the present invention, it is not intended to limit the invention, it is all at this
Any modification, equivalent substitution, improvement and etc. done within the spirit and principle of invention, should be included in protection scope of the present invention
Within.
Claims (8)
- A kind of 1. multi-direction deformation monitoring method of structure based on distributed optical fiber stress measurement, it is characterized in that to the knot that is laid in Optical cable on structure body carries out stress mornitoring, and optical cable is installed on structure (5) by optical cable fixture (fixator) and optical cable traction On, and be the laying of tensioning, optical cable is laid by traction and optical cable fixture (fixator) so that optical cable is in length direction With with length direction have a certain degree (such as 90 ± 15 °) laid (optical cable structure 90 ± 15 ° steering), work as structure Occur, along during the deformation in optical cable pathway length direction or vertical light cable diameter road direction, to be responsible for the deformation of optical cable axial direction.
- 2. the multi-direction deformation monitoring method of structure according to claim 1, it is characterized in that optical cable length direction and with Length direction is continuously laid into 90 ± 15 ° of angles, and optical fiber is into U-shaped, gate or angular into one in angled bending.
- 3. the multi-direction deformation monitoring method of structure according to claim 1, it is characterized in that optical cable reaches linear Tight state.
- 4. the multi-direction deformation monitoring method of structure according to claim 1, it is characterized in that structure deforms upon, stress Optical cable tensioning is detected, stress suffered by stress mornitoring optical cable increases；Stress mornitoring length direction and with length direction into certain Stress variation suffered by the optical cable that angle (such as 90 ± 15 °) angle is laid is provided by brillouin scattering signal, and passes through mould Formula recognition unit signal processing, obtains optical cable all sites suffered stress, stress variation in real time, stress variation positional information, i.e., Obtain stress, stress variation suffered by the structure upper stress detection optical cable of some space or time interval, stress variation position letter Breath；After distribution type fiber-optic Detection location instrument carries out comprehensive analysis processing to stress detection light cable stress information, formed to structure The judgement of deformed state, exports stress mornitoring optical cable deformation signal.
- A kind of 5. multi-direction deformation monitoring system of structure based on distributed optical fiber stress measurement, it is characterized in that including distribution Fiber-optic probe position indicator (1), stress mornitoring optical cable (2), optical cable fixture (3) and tractor (4), distribution type fiber-optic Detection location instrument The stress mornitoring optical cable installed on the connection structure, carries out the multidirectional deformed state of structure to monitor in real time and anti- Shield；The distribution type fiber-optic Detection location instrument is acquired by the strain to detecting and temperature signal, after conversion processing, The strain variation of stress detection light cable is monitored in real time.Stress is examined by tractor (4) and optical cable fixture (fixator) Survey fiber cable laying so that stress mornitoring optical cable is laid in length direction and with angle of the length direction into 90 ± 15 °, i.e. light Cable turns to for 90 ± 15 ° in structure, when structure occurs along the path length direction of stress mornitoring fiber cable laying or vertical optical cable During the deformation in pathway direction, the shape of optical cable axial direction is responsible for.
- 6. multi-direction deformation monitoring system according to claim 5, it is characterized in that the stress mornitoring optical cable, passes through light Cable clamp and tractor are installed on structure (5), and optical cable raw footage direction vertical 90 is carried out to optical cable by tractor (4) ± 15 ° of laying (optical cable is in 90 ± 15 ° of steerings of structure), when structure occurs along optical cable pathway principal direction or vertical light cable diameter During the deformation in road direction, the deformation of optical cable axial direction is responsible for.
- 7. multi-direction deformation monitoring system according to claim 5, it is characterized in that multi-direction deformation monitoring system, its feature It is optical cable fixture and optical cable retractor structures tensioning optical cable.
- 8. multi-direction deformation monitoring system according to claim 5, it is characterized in that distribution type fiber-optic Detection location instrument, connection The stress mornitoring optical cable installed on the structure, carries out the multidirectional deformed state of structure to monitor and protect in real time； , can be to stress after the distribution type fiber-optic Detection location instrument is by the processing such as be acquired, convert to the signal detected The strain variation of detection optical cable is monitored in real time；The distribution type fiber-optic Detection location instrument includes distributed fiber optic temperature and strain transducer, the detection of Brillouin scattering Instrument, pattern recognition unit, stress mornitoring optical cable are laid on structure, and structure deforms upon, the tensioning of stress mornitoring optical cable, Stress suffered by stress mornitoring optical cable increases；Stress variation suffered by stress mornitoring optical cable is provided by brillouin scattering signal, and is passed through Cross pattern recognition unit signal processing, obtain the optical cable information such as suffered stress, stress variation, stress variation position in real time, to obtain the final product To the letter such as stress, stress variation, stress variation position suffered by the structure upper stress of some space or time interval detection optical cable Breath；After distribution type fiber-optic Detection location instrument carries out comprehensive analysis processing to stress detection light cable stress information, formed to structure The judgement of deformed state, exports deformation signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711095842.XA CN108007371A (en) | 2017-11-09 | 2017-11-09 | A kind of multi-direction deformation monitoring method of structure and system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285769A (en) * | 2019-07-12 | 2019-09-27 | 南京大学 | A kind of scale expansion device for distributive fiber optic strain sensing |
| CN113203507A (en) * | 2021-04-27 | 2021-08-03 | 华中科技大学 | Optical fiber ground stress measuring system |
| CN114279420A (en) * | 2021-12-22 | 2022-04-05 | 湖北三江航天红峰控制有限公司 | Three-dimensional space position continuous change combined measuring device and measuring method |
| CN117433748A (en) * | 2023-12-20 | 2024-01-23 | 南京数脉动力信息技术有限公司 | Optical cable structure health and safety monitoring system based on distributed optical fiber sensing |
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| CN106338253A (en) * | 2016-08-17 | 2017-01-18 | 河海大学 | Dam surface underwater collapse distributed optical fiber detection device and detection method |
| CN107063107A (en) * | 2017-03-30 | 2017-08-18 | 云南大永高速公路建设指挥部 | Tunnel wall rock deformation distributed optical fiber sensing system and construction, monitoring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285769A (en) * | 2019-07-12 | 2019-09-27 | 南京大学 | A kind of scale expansion device for distributive fiber optic strain sensing |
| CN113203507A (en) * | 2021-04-27 | 2021-08-03 | 华中科技大学 | Optical fiber ground stress measuring system |
| CN113203507B (en) * | 2021-04-27 | 2022-05-20 | 华中科技大学 | Optical fiber ground stress measuring system |
| CN114279420A (en) * | 2021-12-22 | 2022-04-05 | 湖北三江航天红峰控制有限公司 | Three-dimensional space position continuous change combined measuring device and measuring method |
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| CN117433748A (en) * | 2023-12-20 | 2024-01-23 | 南京数脉动力信息技术有限公司 | Optical cable structure health and safety monitoring system based on distributed optical fiber sensing |
| CN117433748B (en) * | 2023-12-20 | 2024-02-23 | 南京数脉动力信息技术有限公司 | Optical cable structure health and safety monitoring system based on distributed optical fiber sensing |
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