CN109000613A - A kind of three-dimensional rapid detection system of goaf geology sedimentation - Google Patents
A kind of three-dimensional rapid detection system of goaf geology sedimentation Download PDFInfo
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- CN109000613A CN109000613A CN201810957914.5A CN201810957914A CN109000613A CN 109000613 A CN109000613 A CN 109000613A CN 201810957914 A CN201810957914 A CN 201810957914A CN 109000613 A CN109000613 A CN 109000613A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
Abstract
The invention discloses a kind of goaf geology to settle three-dimensional rapid detection system, using the three-dimensional detection system combined based on distributive fiber optic strain detection system with fiber grating strain demodulating system, solve the problems, such as that traditional detection system precision is high but range is small or range is wide but at high cost.By special mounting means, the strain data of geology settling zone three-dimensional can be collected, to judge geology sedimentation degree have better understanding.The invention has the characteristics that: fast response time, precision is high, and real-time is good；Structure is simple, and three-dimensional structure is laid with, it is easier to which modularization making can survey three-dimensional data；Under the premise of guaranteeing detection accuracy, detection range is wide, can be laid on a large scale；The buried underground weatherproof of equipment, round-the-clock holding high-acruracy survey；Whole-course automation is measured, manpower do-it-yourself is not necessarily to；Subsurface three-dimensional Data Detection is conducive to settle modeling to geology；Fibre optical sensor can cope with the various adverse circumstances in underground, long-play.
Description
Technical field
The present invention relates to fibre strain detection technique field more particularly to a kind of three-dimensional quickly detections of goaf geology sedimentation
System.
Background technique
Distributing optical fiber sensing has been widely used in capital construction, pipeline, high-speed rail, bridge etc. with fiber grating and has been set using tradition
The standby scene that can not effectively detect early warning.
In previous geology sedimentation detection, it is difficult to accomplish that the accurate positioning of subrange and geology settle degree
Quickly detection.Problem above can be effectively solved using distributing optical fiber sensing and Fiber Bragg Grating technology, and passes through novel three-dimensional cloth
The mode of setting can obtain settling geology the more advantageous three-dimensional data of detection, under the premise of quick positioning and three-dimensional data
Under support, quickly understands geology sedimentation degree and its position, timely early warning solve a problem promptly.
Summary of the invention
The present invention provides a kind of goaf geology to settle three-dimensional rapid detection system, existing mined out its object is to solve
The drawbacks of geology sedimentation detection in area's can not be positioned quick and precisely with detection, and solved by special three dimensional arrangement mode existing
Technology can not accurately understand the drawbacks of goaf geology settling zone situation, disclose and a kind of combine fiber grating with optical cable
The technical solution that three dimensional arrangement mode and Distributed Detection are combined with point type detection.By to geology laterally, it is longitudinal and
The data of the strain variation of depth acquire, and construct the three-dimensional geological state of goaf underground.This method has detection response fast, smart
Spend height, high reliablity, it is low in cost, easy for installation the advantages that.
The present invention in order to solve the above problem used by technical solution are as follows: a kind of three-dimensional quickly detection of goaf geology sedimentation
System, comprising:
Cable configuration and fiber grating integrated morphology；
Cable configuration includes distributed strain detection system and sensing optic cable, and fiber grating integrated morphology includes that fiber grating is integrated
Device and fiber grating strain demodulating system；Wherein, distributed strain detection system connects sensing optic cable, fiber grating strain solution
Adjusting system is connected to fiber grating integrating device, and fiber grating integrating device is distributed on the crosspoint of sensing optic cable, is being distributed
After formula strain detecting system obtains fibre strain area coordinate range by sensing optic cable, detected using optical fiber grating regulating system
Corresponding position geology settles degree；Fiber grating integrating device includes concrete stake, high-precision flange-interface and fiber grating, wherein
High-precision flange-interface melts in insertion concrete stake, and fiber grating is connected to high-precision flange-interface while also melting insertion concrete stake
In, in order to which fiber grating will strain real-time delivery to the high-precision flange-interface in concrete stake, the connection of fiber grating another side
To sensing optic cable, the sedimentation depth of settlement region is measured by the positioning of sensing optic cable structure and strain data.
Wherein, distributed strain detection system include narrow linewidth laser, the first fiber coupler, light pulse modulator,
Pulse image intensifer, circulator, erbium-doped fiber amplifier, the second fiber coupler, scrambler, the first photodetector, microwave
Scan module, data collecting card and host computer；Wherein, narrow linewidth laser is launched into system source and is connected to the first optical fiber coupling
The port c of clutch (8), the port a of the first fiber coupler are connected to light pulse modulator output pulsed light, the first fiber coupling
The port b of device is connected to scrambler output with reference to the port a for being optically coupled to the second fiber coupler, by light pulse modulator tune
Pulse after system is optically coupled to pulsed light amplifier, is then attached to the port c of circulator, and the port b of circulator is connected to biography
Sensing optical cable, the port a of circulator are connected to erbium-doped fiber amplifier for after the amplification of back scattering optical signal, inject the second optical fiber coupling
The port b of clutch, and is connected to the port b of the first fiber coupler after the reference light beat frequency that scrambler exports, by second
The port c of fiber coupler enter the first photodetector, be serially connected to later microwave swept frequency module, data collecting card and on
Position machine.
Wherein, fiber grating strain demodulating system includes wideband light source, isolator, F-P filter, coupler, the first ring
Shape device, the second circulator, F-P etalon, reference grating, the second photodetector, capture card and industrial personal computer；Wherein, broadband light
The port c of coupler is sent into source by isolator through F-P filter, is sent into the test first annular device in road from the port b of coupler
The port c, sensor fibre grating is sent by the port b of first annular device, the signal of return by first annular device the port a into
Enter the second photodetector, while the port a of coupler is exported to the port b of the second circulator of reference arm, passes through the second annular
The port c of device is exported through F-P etalon to reference grating, and obtained signal is input to second by the port a of the second circulator
Then photodetector acquires signal feeding industrial personal computer by capture card and handles to obtain detection data.
Wherein, melt insertion high-precision flange-interface among concrete stake, horizontal and vertical sensing optic cable is linked to optical fiber
The strain signal of grating, fiber grating is perceived by the sensing optic cable of transverse and longitudinal by fiber grating strain demodulating system.
It is different from the prior art, a kind of three-dimensional rapid detection system of goaf geology sedimentation provided by the invention, using base
In the three-dimensional detection system that distributive fiber optic strain detection system is combined with fiber grating strain demodulating system, solves tradition
Detection system precision is high but range is small or range is wide but at high cost problem.By special mounting means, it can collect ground
The strain data of matter settling zone three-dimensional, to judge geology sedimentation degree have better understanding.Apparatus of the present invention and existing detection
Device is compared, and advantage is: fiber grating and optical cable fast response time, and precision is high, and real-time is good；Structure is simply easy to install, work
Make reliable and stable；Three-dimensional structure is laid with, it is easier to which modularization making can survey three-dimensional data；Under the premise of guaranteeing detection accuracy, inspection
It is wide to survey range, can be laid on a large scale, it is low in cost；The buried underground weatherproof of equipment, round-the-clock are round-the-clock to keep high-precision
Degree measurement；Measure whole-course automation, go wrong can early warning, be not necessarily to manpower do-it-yourself；Subsurface three-dimensional Data Detection, more favorably
It is modeled in being settled to geology；Fibre optical sensor perfect can cope with the various adverse circumstances in underground, can long-play.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that a kind of goaf geology provided by the invention settles three-dimensional rapid detection system；
Fig. 2 is the structural representation that a kind of goaf geology provided by the invention settles cable configuration in three-dimensional rapid detection system
Figure；
Fig. 3 is the knot that a kind of goaf geology provided by the invention settles fiber grating integrating device in three-dimensional rapid detection system
Structure schematic diagram；
Fig. 4 is that a kind of goaf geology provided by the invention settles distributed strain detection system in three-dimensional rapid detection system
Structural schematic diagram；
Fig. 5 is that a kind of goaf geology provided by the invention settles fiber grating strain demodulating system in three-dimensional rapid detection system
Structural schematic diagram.
Specific embodiment
Further more detailed description is made to technical solution of the present invention With reference to embodiment.Obviously, it is retouched
The embodiment stated is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
Those of ordinary skill in the art's every other embodiment obtained without creative labor, all should belong to
The scope of protection of the invention.
It please refers to shown in Fig. 1, Fig. 1 is the knot that a kind of goaf geology provided by the invention settles three-dimensional rapid detection system
Structure schematic diagram.The system includes:
Cable configuration and fiber grating integrated morphology；
The cable configuration includes distributed strain detection system 5 and sensing optic cable 4, and fiber grating integrated morphology includes optical fiber light
Grid integrating device 6 and fiber grating strain demodulating system 30；Wherein, distributed strain detection system 5 connects sensing optic cable 4, light
Fiber grating strain demodulating system 30 is connected to fiber grating integrating device 6, and fiber grating integrating device 6 is distributed in sensing optic cable 4
Crosspoint on, after distributed strain detection system 5 obtains fibre strain area coordinate range by sensing optic cable 4, utilize
Optical fiber grating regulating system 30 detects corresponding position geology and settles degree.Fiber grating 3 is using quasi-distributed measurement, when outer
Boundary's geologic change, fiber grating 3 experience stress and wavelength change occur, and capture strain by fiber grating strain demodulating system 30 and become
Change.To conclude that geology settles depth.When geology, which settles, to be occurred, optical cable experiences stress variation, transverse and longitudinal degree of strain feedback
To distributed strain detection system 5, by degree of strain and strain location, to determine geology sedimentation degree and subsidence range.
As shown in Fig. 2, by distributed strain detection system 5, sensing optic cable 4, the arrangement installation of fiber grating integrating device 6
To goaf earth's surface.Geology subsidence range can be effectively accurately positioned in sensing optic cable 4, then is accessed by fiber grating integrating device 6
Fiber grating strain demodulating system 30 measures geology and settles depth, determines the extent of injury.
The fiber grating integrating device 6 includes concrete stake 1, high-precision flange-interface 2 and fiber grating 3, wherein high-precision
Degree flange-interface 2 melts in insertion concrete stake 1, and fiber grating 3 is connected to high-precision flange-interface 2 while also melting insertion concrete stake 1
In, in order to which fiber grating 3 will strain real-time delivery to the high-precision flange-interface 2 in concrete stake 3,3 another side of fiber grating
It is connected to sensing optic cable 4, the sedimentation depth of settlement region is measured by the positioning of sensing optic cable structure and strain data.
As shown in Fig. 3, concrete stake 1, high-precision flange-interface 2, fiber grating 3 are assembled into forming fibre-optic grating integrating device
6 and distributing installation on the crosspoint of sensing optic cable 4, concrete stake 1 takes suitable size, it is ensured that high-precision flange-interface 2 and light
Fine grating 3 melts insertion concrete stake 1 completely, and the upper port of concrete stake 1 is the interface of high-precision flange-interface 2, can be connected into optical fiber light
Grid strain demodulating system 30, place into the soil in can from surface effective detect geology settle depth.
Wherein, distributed strain detection system 5 includes narrow linewidth laser 7, the first fiber coupler 8, light pulse modulation
Device 9, pulse image intensifer 10, circulator 11, erbium-doped fiber amplifier 12, the second fiber coupler 13, scrambler 14, the first light
Electric explorer 15, microwave swept frequency module 16, data collecting card 17 and host computer 18；Wherein, described to emit narrow linewidth laser 7
System source is connected to the port c of the first fiber coupler 8 out, and the port a of the first fiber coupler 8 is connected to light pulse modulation
Device 9 exports pulsed light, and the port b of the first fiber coupler 8 is connected to the output reference of scrambler 14 and is optically coupled to the second optical fiber coupling
The port a of clutch 13 is optically coupled to pulsed light amplifier 10 by the modulated pulse of light pulse modulator 9, is then attached to
The port c of circulator 11, the port b of circulator 11 are connected to sensing optic cable 4, and the port a of circulator 11 is connected to Er-doped fiber
After amplifier 12 amplifies back scattering optical signal, the port b of the second fiber coupler 13 is injected, and is connected to the first optical fiber coupling
The port b of clutch 8 enters first after the reference light beat frequency that scrambler 14 exports, by the port c of the second fiber coupler 13
Photodetector 15 is serially connected to microwave swept frequency module 16, data collecting card 17 and host computer 18 later.Distributed strain inspection
The structure of examining system 5 is as shown in Figure 4.
Wherein, fiber grating strain demodulating system 30 includes wideband light source 19, isolator 20, F-P filter 21, coupler
22, first annular device 23, the second circulator 24, F-P etalon 25, reference grating 26, the second photodetector 27, capture card 28
With industrial personal computer 29；Wherein, wideband light source 19 is sent into the port c of coupler 22 by isolator 20 through F-P filter 21, from coupling
The port c of the test first annular device 23 in road is sent into the port b of device 22, is sent into sensor fibre light by the port b of first annular device 23
The signal of grid 3, return enters the second photodetector 27, while the port a of coupler 22 by the port a of first annular device 23
Output is exported through F-P etalon to reference to the port b of the second circulator of reference arm 24 by the port c of the second circulator 24
Grating 26, obtained signal are input to the second photodetector 27 by the port a of the second circulator 24, then pass through capture card
28 acquisition signals are sent into the processing of industrial personal computer 29 and obtain detection data.The structure of fiber grating strain demodulating system 30 is as shown in Figure 5.
Wherein, melt insertion high-precision flange-interface 2 among concrete stake 1, horizontal and vertical sensing optic cable 4 is linked to light
The strain signal of fine grating 3, fiber grating 3 is perceived by the sensing optic cable 4 of transverse and longitudinal by fiber grating strain demodulating system 30.
It is different from the prior art, a kind of three-dimensional rapid detection system of goaf geology sedimentation provided by the invention, using base
In the three-dimensional detection system that distributive fiber optic strain detection system is combined with fiber grating strain demodulating system, solves tradition
Detection system precision is high but range is small or range is wide but at high cost problem.By special mounting means, it can collect ground
The strain data of matter settling zone three-dimensional, to judge geology sedimentation degree have better understanding.Apparatus of the present invention and existing detection
Device is compared, and advantage is: fiber grating and optical cable fast response time, and precision is high, and real-time is good；Structure is simply easy to install, work
Make reliable and stable；Three-dimensional structure is laid with, it is easier to which modularization making can survey three-dimensional data；Under the premise of guaranteeing detection accuracy, inspection
It is wide to survey range, can be laid on a large scale, it is low in cost；The buried underground weatherproof of equipment, round-the-clock are round-the-clock to keep high-precision
Degree measurement；Measure whole-course automation, go wrong can early warning, be not necessarily to manpower do-it-yourself；Subsurface three-dimensional Data Detection, more favorably
It is modeled in being settled to geology；Fibre optical sensor perfect can cope with the various adverse circumstances in underground, can long-play.
The above is only embodiments of the present invention, are not intended to limit the scope of the invention, all to utilize the present invention
Equivalent structure or equivalent flow shift made by specification and accompanying drawing content is applied directly or indirectly in other relevant technologies
Field is included within the scope of the present invention.
Claims (4)
1. a kind of goaf geology settles three-dimensional rapid detection system characterized by comprising cable configuration and fiber grating collection
At structure；
The cable configuration includes distributed strain detection system (5) and sensing optic cable (4), the fiber grating integrated morphology packet
Include fiber grating integrating device (6) and fiber grating strain demodulating system (30)；Wherein, distributed strain detection system (5) connects
It connects sensing optic cable (4), fiber grating strain demodulating system (30) is connected to fiber grating integrating device (6), and fiber grating is integrated
Device (6) is distributed on the crosspoint of sensing optic cable (4), is obtained in distributed strain detection system (5) by sensing optic cable (4)
After fibre strain area coordinate range, degree is settled using optical fiber grating regulating system (30) detection corresponding position geology；It is described
Fiber grating integrating device (6) includes concrete stake (1), high-precision flange-interface (2) and fiber grating (3), wherein high-precision method
Blue interface (2) is melted in insertion concrete stake (1), and fiber grating (3) is connected to high-precision flange-interface (2) while also melting insertion cement
In stake (1), in order to which fiber grating (3) will strain real-time delivery to the high-precision flange-interface (2) in concrete stake (3), optical fiber
Grating (3) another side is connected to sensing optic cable (4), measures settlement region by the positioning of sensing optic cable structure and strain data
Settle depth.
2. goaf geology according to claim 1 settles three-dimensional rapid detection system, which is characterized in that distributed strain
Detection system (5) includes narrow linewidth laser (7), the first fiber coupler (8), light pulse modulator (9), pulse image intensifer
(10), circulator (11), erbium-doped fiber amplifier (12), the second fiber coupler (13), scrambler (14), the first photodetection
Device (15), microwave swept frequency module (16), data collecting card (17) and host computer (18)；Wherein, described by narrow linewidth laser (7)
Launch the port c that system source is connected to the first fiber coupler (8), the port a of the first fiber coupler (8) is connected to light
Pulse-modulator (9) exports pulsed light, and the port b of the first fiber coupler (8) is connected to scrambler (14) output reference light and connects
It is connected to the port a of the second fiber coupler (13), pulsed light is optically coupled to by light pulse modulator (9) modulated pulse and puts
Big device (10), is then attached to the port c of circulator (11), and the port b of circulator (11) is connected to sensing optic cable (4), annular
The port a of device (11) is connected to erbium-doped fiber amplifier (12) for after the amplification of back scattering optical signal, injects the second fiber coupling
The port b of device (13) passes through the reference light beat frequency of scrambler (14) output with the port b for being connected to the first fiber coupler (8)
Afterwards, the first photodetector (15) are entered by the port c of the second fiber coupler (13), is serially connected to microwave swept frequency mould later
Block (16), data collecting card (17) and host computer (18).
3. goaf geology according to claim 1 settles three-dimensional rapid detection system, which is characterized in that the optical fiber light
It includes wideband light source (19), isolator (20), F-P filter (21), coupler (22), the first ring that grid, which strain demodulating system (30),
Shape device (23), the second circulator (24), F-P etalon (25), reference grating (26), the second photodetector (27), capture card
(28) and industrial personal computer (29)；Wherein, wideband light source (19) is sent into coupler (22) through F-P filter (21) by isolator (20)
The port c, from the port b of coupler (22) be sent into test the first annular device in road (23) the port c, by first annular device (23)
Sensor fibre grating (3) are sent into the port b, and the signal of return enters the second photodetection by the port a of first annular device (23)
Device (27), while the port a of coupler (22) is exported to the port b of the second circulator of reference arm (24), passes through the second circulator
(24) the port c is exported through F-P etalon to reference grating (26), and obtained signal passes through the port a of the second circulator (24)
The second photodetector (27) are input to, then signal feeding industrial personal computer (29) processing is acquired by capture card (28) and is detected
Data.
4. goaf geology according to claim 1 settles three-dimensional rapid detection system, which is characterized in that concrete stake (1)
Insertion high-precision flange-interface (2) is melted in centre, and horizontal and vertical sensing optic cable (4) is linked to fiber grating (3), optical fiber light
The strain signal of grid (3) is perceived by the sensing optic cable (4) of transverse and longitudinal by fiber grating strain demodulating system (30).
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| CN107101624A (en) * | 2017-05-23 | 2017-08-29 | 中国水利水电科学研究院 | Geological deformation stereo observing system and its Embedded installation method, measuring method |
| CN109613005A (en) * | 2018-12-20 | 2019-04-12 | 武汉隽龙科技股份有限公司 | Damage detecting method based on OFDR |
| CN109696152A (en) * | 2019-02-13 | 2019-04-30 | 太原理工大学 | A kind of low coherence regional land subsidence amount evaluation method |
| CN114413838A (en) * | 2022-01-25 | 2022-04-29 | 中煤航测遥感集团有限公司 | Goaf collapse area monitoring system, monitoring equipment, monitoring method and monitoring device |
| CN114608524A (en) * | 2022-02-17 | 2022-06-10 | 武汉理工大学 | Roadbed settlement monitoring system based on weak optical fiber grating array and monitoring method thereof |
| CN114705126A (en) * | 2022-01-26 | 2022-07-05 | 中煤科工生态环境科技有限公司 | Deep goaf optical fiber construction guiding device, process and full-stratum monitoring method |
| CN115077407A (en) * | 2022-06-22 | 2022-09-20 | 武汉理工大学 | Slope damage simulation detection device and method based on fiber bragg grating |
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| CN115077407B (en) * | 2022-06-22 | 2023-08-08 | 武汉理工大学 | Slope damage simulation detection device and method based on fiber bragg grating |
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Application publication date: 20181214 |