CN102221346B - Full-scale optic fiber sensing technology for monitoring road structural form - Google Patents
Full-scale optic fiber sensing technology for monitoring road structural form Download PDFInfo
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- CN102221346B CN102221346B CN 201110056824 CN201110056824A CN102221346B CN 102221346 B CN102221346 B CN 102221346B CN 201110056824 CN201110056824 CN 201110056824 CN 201110056824 A CN201110056824 A CN 201110056824A CN 102221346 B CN102221346 B CN 102221346B
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Abstract
The invention discloses a full-scale optic fiber sensing technology for monitoring a road structural form and belongs to the field of intelligently and healthily monitoring structures. The technology is characterized by comprising the following steps of: performing full-scale monitoring on the road structural form by utilizing a distributed optic fiber sensing technology; and on the basis of optic fiber sensing information in a full-scale direction, reshaping the monitored road structural form by a method for reconstructing a relationship between bending strain and curvature, and comparatively analyzing the reconstructed road structural form and the initial form to reflect health information of a road structure. The invention has the advantages that: a basic form of a road structure service condition can be reconstructed, the road structural form can be timely monitored on a full scale, the initial form and the reconstructed form of the road structure are comparatively analyzed, and the health information of the road structure in the full-scale direction can be mastered.
Description
Technical field
The invention belongs to structure intelligent health monitoring technical field, what relate to is a kind of full size optical fiber sensing technology of road structure form monitoring.
Background technology
For road structure, actual carrying main body is ground, and its intensity and stability directly influence the use character of road.But when the ground of road structure produced as the disease of types such as local depression, cracking, it can expand to road surface fast because of the repeatedly effect of extraneous load.If this type of damage of road structure is keeped in repair, then need to begin regulation from the ground of the bottom, the required financial resources that expend and material resources will be quite big.Therefore, have and in time to monitor and real-time servicing the state on road structure basis, bring big problem with the exempt from customs examination later stage work.About road structure, current detection technique has: by extracting the infrared imagery technique that road surface information realizes each correlated performance test of road structure; Realize spectrum analysis technique, Ultrasonic Nondestructive technology and the Fiber Bragg Grating technology etc. of each correlated performance test of road structure by bury sensor underground in road structure inside.But they all are confined to local damage and detect, and the test theory rests on the detection to other top dielectric layer of road structure, and have ignored the monitoring of road structure basis form.Therefore, can consider to adopt good endurance, anti-electromagnetic interference capability is strong and the optical fiber sensing technology of the long distance test function of tool, the form of road structure is carried out the full size monitoring.At present, do not occur as yet about road structure being carried out the form Study of Monitoring.But, the part scholar is arranged in other field, by optical fiber sensing technology test data is carried out obtaining by the planform of reconstruct after the particular procedure.The Zhang Yanan of Shanghai University etc. utilizes the curvature information of the equidistant discrete point of fiber-optic grating sensor geodetic underground pipelines, and by the anti-locus shape that pushes away place's underground utilities of space curve reconstructing method, but precision has much room for improvement.Canada Lee Danisch has developed a kind of quasi-distributed fiber grating curvature sensor that is mainly used to the monitoring of structures geometric distortion, but the intensity of this sensor opposing foreign object is lower, and built-in many fiber gratings make its cost very high.Harbin Institute of Technology pays the method for reconstructing that the quasi-distributed optical fiber sensing measurement system that should profit etc. utilizes certain curvature has been explored three curved-surface structures, and with the measuring system of its design of verification experimental verification and the validity of method for reconstructing, but its research object is size-constrained.Comprehensive aforementioned research basis, the present invention proposes to adopt optical fiber sensing technology, road structure is carried out the full size monitoring of form; Adopt specific device, the information of test optical fiber is reconstructed processing, obtain the current form of road structure, by being analyzed with initial configuration, obtain the health and fitness information of road structure.
Summary of the invention
The purpose of this invention is to provide a kind of full size optical fiber sensing technology based on the monitoring of road structure form, solved road structure form full size problems of monitoring.
Technical scheme of the present invention is:
A kind of full size optical fiber sensing technology based on the monitoring of road structure form utilizes optical fiber as the sensing element of road structure form monitoring; Adopt metal circular tube as the protective sleeve of distribution type fiber-optic; the little square groove in top is reserved along the full size direction in the pipe inboard; as the movable rail of the marmem of optical fiber and grip optical fiber, and pipe position of neutral axis place is laid with the removable transmission rod that is connected by the circle sheet metal with marmem.During by the integrated system works of this technology, utilize extraneous load transfer device to move transmission rod, thereby optical fiber and marmem have been driven along mobile in the metal circular tube of road full size direction, optical fiber passes to the distribution type fiber-optic (FBG) demodulator with the signal of perception, utilize the data message after the demodulation, be reconstructed processing, obtain the instant full size form of road structure.
The feature technology that the present invention comprises:
1. the monitoring of the full size form of described road structure refers to road structure is carried out the macroscopic view monitoring along the form of span direction;
2. described distribution type fiber-optic can be free movable along metal circular tube full size direction, only experiences bending strain by the memory function assurance optical fiber of marmem when testing, and do not stretched and compression force;
3. described marmem is to be laminar alloy with memory function, its memory be the state of not stressing;
4. described metal circular tube is that diameter is the round steel pipe along the full distribution of road structure span direction of 1cm;
5. described transmission rod is that effect by extraneous load transfer device drives that it can be along the activity of road structure full size direction;
6. described reconstruction processing refers to utilize the relation of bending strain and curvature in conjunction with the information of optical fiber in the full size directional perception, constructs out the road structure form that monitors again, is different from the initial configuration of road structure;
7. the instant full size form of described road structure refers to the full size form of road structure in the test duration section, and its variation can be at the health and fitness information of macroscopic view reflection road structure.
Effect of the present invention and benefit are: the basic form that can reconstruct the road structure service state, can realize that the full size of road structure form in time monitors, the initial configuration of comparative analysis road structure and reconstruct form can be held the health and fitness information of road structure full size direction.In addition, the technology of the present invention provides a kind of consideration to test the new concept that full size damages identification and full size information diagnosis from full size, and monitoring structural health conditions is had directive significance preferably.
Description of drawings
Accompanying drawing 1 is based on the full size optical fiber sensing system figure of road structure form monitoring.
Accompanying drawing 2 is full size optical fiber installation technics synoptic diagram.
Among the figure: 1 distribution type fiber-optic; 2 metal circular tubes; 3 marmems; 4 circular metal plates; 5 transmission rods; The surface layer of 6 road structures; The basic unit of 7 road structures; The subbase of 8 road structures; The ground of 9 road structures; 10 data processors; 11 distribution type fiber-optic (FBG) demodulators; 12 load transfer devices; The road structure form of 13 reconstruct.
Embodiment
Be described in detail the specific embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.
A kind of system that utilizes optical fiber sensing technology the road structure form to be carried out the full size monitoring, as shown in Figure 1, utilize the full size optical fiber sensing technology, road structure is carried out the form monitoring, mainly comprise: parts such as 1 distribution type fiber-optic, 2 metal circular tubes, 3 marmems, 4 circular metal plates, 5 transmission rods, 10 data processors, 11 distribution type fiber-optic (FBG) demodulators, 12 load transfer devices.Wherein, the packaging technology of 1 distribution type fiber-optic as shown in Figure 2, at the installation technics of road structure full size direction as shown in Figure 1.
Embodiment based on the full size optical fiber sensing technology of road structure form monitoring is as follows:
At first, 1 distribution type fiber-optic is laid in after 3 marmem clampings in the little square groove of 2 metal circular tubes, after its integral body is embedded in the basal layer (wherein, optical fiber is reserved unnecessary lead-in wire at place, the two ends of road structure full size direction) of road structure; The extension line of optical fiber one end links to each other with 11 distribution type fiber-optic (FBG) demodulators, and 11 distribution type fiber-optic (FBG) demodulators are connected with data processor, and 5 transmission rods link to each other with extraneous 12 load transfer devices.So far, the equipment needed thereby configuration finishes, and this system is carried out the unobstructed check of light path.During test, by extraneous 12 load transfer devices power is passed to 5 transmission rods, thereby drive by 1 distribution type fiber-optic of 3 marmem clampings along the little square groove activity in 2 metal circular tubes, thus signal is passed to 11 distribution type fiber-optic (FBG) demodulators, signal after the demodulation is handled by 10 data processors, the road structure form of reconstruct can be obtained, by being analyzed with its initial configuration, the health status on the road structure full size can be obtained.
Claims (3)
1. full size optical fiber sensing method based on road structure form monitoring, it is characterized in that: distribution type fiber-optic (1) is fixed by marmem (3) and rosette (4), the metal circular tube of built-in little square groove (2) is as the event trace of distribution type fiber-optic (1), and distribution type fiber-optic (3) one end extension lines are connected with distribution type fiber-optic (FBG) demodulator (11) sets up sensor-based system; During test, the transmission rod (5) that is connected with rosette (4) moves by extraneous load transfer device driving distribution type fiber-optic (1) thereby along conduit and carries out the instant full size form monitoring of road structure; In conjunction with the information of distribution type fiber-optic (1) in the full size directional perception, utilize the relation of bending strain and curvature, test data is handled reconstructing the road structure form that monitors by data processor (10).
2. a kind of full size optical fiber sensing method based on road structure form monitoring according to claim 1, it is characterized in that: distribution type fiber-optic (1) is free movable along metal circular tube (2) full size direction, memory merit assurance optical fiber by marmem (3) is only experienced bending strain when testing, and is not stretched and compression force
3. a kind of full size optical fiber sensing method based on road structure form monitoring according to claim 1, it is characterized in that: the instant full size form of road structure refers to that road structure is along the real-time form of span direction; Reconstruct refers to construct out again the road structure form (13) that monitors, and is different from the initial configuration of road structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110056824 CN102221346B (en) | 2011-03-10 | 2011-03-10 | Full-scale optic fiber sensing technology for monitoring road structural form |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110056824 CN102221346B (en) | 2011-03-10 | 2011-03-10 | Full-scale optic fiber sensing technology for monitoring road structural form |
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| CN102221346A CN102221346A (en) | 2011-10-19 |
| CN102221346B true CN102221346B (en) | 2013-07-10 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628673A (en) * | 2012-03-30 | 2012-08-08 | 大连理工大学 | Armor optical fiber sensor suitable for road structure full size monitoring |
| CN105064187B (en) * | 2015-05-18 | 2017-03-08 | 大连理工大学 | Sensor is monitored in the continuous vertical deformation of bituminous paving based on optical fiber sensing technology |
| CN108592855A (en) * | 2018-04-28 | 2018-09-28 | 中国民航大学 | A kind of airfield pavement lower part excavation deformation monitoring device based on BOTDA sensing technologies |
| CN109990723B (en) * | 2018-11-30 | 2021-01-12 | 东莞理工学院 | Reusable embedded type grating measuring device |
| CN112880578B (en) * | 2020-12-28 | 2022-04-22 | 南京航空航天大学 | System and method suitable for monitoring dislocation of airport pavement seam structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1758017A (en) * | 2005-11-04 | 2006-04-12 | 哈尔滨工业大学 | Optical fiber grating sensor enbedded in highway and its packaging method |
| CN101660898A (en) * | 2009-09-24 | 2010-03-03 | 宁波杉工结构监测与控制工程中心有限公司 | Fiber grating pavement strain transducer |
| CN201688929U (en) * | 2010-04-27 | 2010-12-29 | 南京航空航天大学 | Bituminous pavement pressure sensor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1758017A (en) * | 2005-11-04 | 2006-04-12 | 哈尔滨工业大学 | Optical fiber grating sensor enbedded in highway and its packaging method |
| CN101660898A (en) * | 2009-09-24 | 2010-03-03 | 宁波杉工结构监测与控制工程中心有限公司 | Fiber grating pavement strain transducer |
| CN201688929U (en) * | 2010-04-27 | 2010-12-29 | 南京航空航天大学 | Bituminous pavement pressure sensor |
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