CN203758530U - Optical fiber sensing system for timely monitoring landslide condition of slope - Google Patents
Optical fiber sensing system for timely monitoring landslide condition of slope Download PDFInfo
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- CN203758530U CN203758530U CN201320866057.0U CN201320866057U CN203758530U CN 203758530 U CN203758530 U CN 203758530U CN 201320866057 U CN201320866057 U CN 201320866057U CN 203758530 U CN203758530 U CN 203758530U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 70
- 239000013307 optical fiber Substances 0.000 title claims abstract description 50
- 239000000835 fiber Substances 0.000 claims abstract description 48
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- 239000011435 rock Substances 0.000 claims abstract description 9
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- 238000005452 bending Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
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- 238000003909 pattern recognition Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 18
- 239000002689 soil Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
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- 229910000831 Steel Inorganic materials 0.000 description 1
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- 230000005540 biological transmission Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
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Abstract
The utility model relates to an optical fiber sensing system for timely monitoring landslide condition of a slope. An anti-slip spud is arranged on the slope, and the bottom of the anti-slip spud stretches into bed rock on the bottom of the slope. The optical fiber sensing system comprises a fiber bragg grating sensing network, an on-site monitoring room, a central monitor center and a remote client. The anti-slip spud is provided with an FBG strain sensor and an FBG temperature sensor in a pouring manner. The sensors are connected to a fiber bragg grating network analyzer through monitor optical cables. The on-site monitoring room is internally provided with the fiber bragg grating network analyzer, a monitor computer and an alarm. The fiber bragg grating network analyzer is connected to the monitor computer, and the alarm is connected to the fiber bragg grating network analyzer. The central monitor center is arranged in an office, one end of the central monitor center is connected with the fiber bragg grating network analyzer, and the other end of the central monitor center is connected to the remote client through the Internet. The optical fiber sensing system adopts the optical fiber sensing technology to monitor physiological parameters such as strain of the anti-slip spud and temperature of the slope, and can carry out real-time and effective monitor on the safety condition of the slope.
Description
Technical field
The utility model relates to optical fiber grating sensing field, specifically, relate to a kind of based on fiber-optic grating sensor for monitoring the optical fiber sensing technology of slope and land slide situation Real-Time Monitoring.
Background technology
Optical fiber sensing technology is follow the development of Fibre Optical Communication Technology and develop rapidly at 20 century 70s, and it is a kind ofly to take light wave as carrier, and optical fiber is medium, a kind of New Sensing Technology of perception and the extraneous measured signal of transmission.These Fibre Optical Sensors can be divided three classes again according to reach: point sensor (as optical fiber micro-bending sensor, optical fiber Fabry-Perot sensor, optical fiber Bragg grating sensor etc.), integrator sensor (as optical fibre Michelson interferometer and Fiber Mach-Zehnder Interferometer), distributed sensor (as the strain that utilizes Brillouin scattering effect to make, Temperature Distribution formula sensor).A kind of as point sensor, fiber grating has obtained worldwide extensive attention in the application of sensory field, it has the unrivaled advantage of other traditional electrical sensor, mainly: anti-electromagnetic interference (EMI), corrosion-resistant, measurement range is wide, it is low etc. to be convenient to be multiplexed into net, miniaturization and maintenance cost.
At present, fiber-optic grating sensor is mainly used in health monitoring and the security monitoring of buildings and bridge.Traditional electrostrictive strain monitoring device for structure monitoring need to adopt cable to transmit power supply and output signal, required number of cable is larger, and its direct-burried cannot be entered to building structure inside, so there is significant limitation realizing aspect long-term Real-Time Monitoring, and fiber-optic grating sensor both can be attached to the surface of structure after encapsulation, also can direct-burried enter in structure structure is carried out to Real-Time Monitoring.In addition, it easily forms high-performance, sensor array cheaply, in structure monitoring application project, has huge market potential.
China is one of country that geology disaster is the most serious in the world, and the loss that waits slope instability disaster to cause by landslide is every year tens billion of, has had a strong impact on the people masses' the security of the lives and property.Traditional stability of slope monitoring method, as geological radar, method of seismic exploration, the earth precision measurement etc., continuity, real-time and the remote measurement all with monitoring are difficult to the shortcoming guaranteeing, therefore, a kind of new measuring technique---optical fiber sensing technology is applied in the monitoring of the geology disasters such as landslide gradually.Compare with traditional measurement method, fiber grating sensing technology shows unique advantage and remarkable performance.
Utility model content
The purpose of this utility model is to provide a kind of real-time alarm system that can be used in slope and land slide parameter measurement based on FBG optical fiber sensing technology.Optical fiber sensing technology of the present utility model can be used for monitoring the physiological parameters such as the strain, temperature of Anti-sliding Pile, can carry out in real time effectively monitoring to the safety case of side slope, can automatically according to monitored data, determine whether to send early warning signal, and data and landslide early warning signal can be sent to managerial personnel, make it can understand in time field condition and provide corresponding indication.
In order to reach foregoing invention object, the technical scheme that the utility model provides is as follows:
A kind of optical fiber sensing system of Real-Time Monitoring slope and land slide situation, the bottom of described side slope is provided with basement rock, in side slope, be provided with friction pile, this friction pile bottom stretches in basement rock, it is characterized in that, this optical fiber sensing system includes optical fiber grating sensing network, on-site supervision chamber, CSRC center and Terminal Server Client, FBG strain transducer and FBG temperature sensor on described friction pile, have been built, this FBG strain transducer and FBG temperature sensor are connected on the indoor fiber grating network analyzer of on-site supervision by monitoring optical cable respectively, in Control Room, be provided with at the scene fiber grating network analyzer, monitoring computer and alarm, described fiber grating network analyzer connects monitoring computer, described alarm connects fiber grating network analyzer, described CSRC center is arranged in office, and described one end, CSRC center connects fiber grating network analyzer, the other end at CSRC center by Internet connection to Terminal Server Client.
In the optical fiber sensing system of the utility model Real-Time Monitoring slope and land slide situation, described FBG strain transducer is laid on the main stress reinforcing bar of friction pile, in the main glide direction of described friction pile, tension and compression-side are respectively selected a longitudinal reinforcement, on longitudinal reinforcement, vertical direction is equidistant is provided with a plurality of FBG strain transducers, a plurality of FBG strain transducers are connected by an optical fiber, and the optical fiber of drawing from one end is connected to fiber grating analyser.
In the optical fiber sensing system of the utility model Real-Time Monitoring slope and land slide situation, for measuring the FBG temperature sensor of landslide environment temperature, be laid in the adjacent position of FBG strain transducer on friction pile, and FBG temperature sensor is parallel with FBG strain transducer.
In the optical fiber sensing system of the utility model Real-Time Monitoring slope and land slide situation, described fiber grating network analyzer includes power wideband light source, photo-coupler, tunable F-P chamber, photo-detector, data acquisition system (DAS) and data handling system, described power wideband light source connects photo-coupler, photo-coupler connects detecting optical cable, detecting optical cable connects the fiber-optic grating sensor on friction pile, photo-coupler is also connected to tunable F-P chamber, and tunable F-P chamber connects photo-detector, data acquisition module and data processing module successively.
In the optical fiber sensing system of the utility model Real-Time Monitoring slope and land slide situation, described data acquisition module includes frequency shift amount computing unit, Wavelet Denoising Method unit, pattern recognition unit, fiber Bragg grating strain sensor temperature compensation unit, Calculation of Bending Deflection unit, information storage and comparing unit.
Based on technique scheme, the optical fiber sensing system of Real-Time Monitoring slope and land slide situation of the present utility model has following technological merit in application:
1. the utility model proposes vertically detect to judge the sliding condition of friction pile surrounding soil in friction pile along the variation of journey strain, specifically fiber grating sensing technology is applied to the system monitoring of slope and land slide, have anti-interference, corrosion-resistant, to be easy to the advantages such as networking obvious; By specific carrier, realized with fiber grating sensing technology monitoring landslide depth displacement and table position and having moved, compare with the technological means that the deep displacement of traditional monitoring slope and land slide moves with table position, fiber grating sensing technology is easy to realize auto-real-time monitoring, spatial resolution is high, and cost is lower.
2. the utility model is when monitoring slope and land slide, by suitable sensor is installed on each friction pile, by specific algorithm, show that in this friction pile, the vertical maximum strain along journey strain distributes, with minimum monitoring point, realize monitoring object, save cost, also reduced set-up time and the damage to the soil body.
3. because all monitoring variables are all realized by fiber grating sensing technology, technology of the present utility model is easy to build monitoring system, is easy to realize the analysis of Monitoring Data real-time automatic collecting and the long-range issue of slope and land slide, the long-range automatic alarm of realizing; Avoid in loaded down with trivial details artificial image data, reduce time of fire alarming, this to the emergency measure of slope and land slide take most important.
Accompanying drawing explanation
Fig. 1 is the formation schematic diagram of the optical fiber sensing system of the utility model Real-Time Monitoring slope and land slide situation.
Fig. 2 is the theory diagram of the optical fiber sensing system of the utility model Real-Time Monitoring slope and land slide situation.
Embodiment
Below we are described in further detail the warning system for slope and land slide parameter measurement of the present utility model with specific embodiment by reference to the accompanying drawings; in the hope of more clear, understand its principle of work and concrete application, but can not limit protection domain of the present utility model with this.
As shown in Figure 1, Fig. 1 is the formation schematic diagram of the optical fiber sensing system of the utility model Real-Time Monitoring slope and land slide situation.Generally, the more dangerous side slope bottom of major part is all basement rock, in order to reach the disaster that prevents landslide and occur, commonly in side slope, be provided with friction pile, this friction pile bottom stretches in basement rock, to increase its stability, real time monitoring of the present utility model is exactly to carry out on the basis of the above optical fiber sensing technology application.
The optical fiber sensing system of the utility model Real-Time Monitoring slope and land slide situation mainly includes optical fiber grating sensing network, on-site supervision chamber, CSRC center and Terminal Server Client on structure forms.Wherein, built FBG strain transducer 5 and FBG temperature sensor 4 on friction pile 3, this FBG strain transducer 5 and FBG temperature sensor 4 are connected on the indoor fiber grating network analyzer 7 of on-site supervision by monitoring optical cable 6 respectively.In Control Room, be provided with altogether fiber grating network analyzer 7, monitoring computer 8 and alarm 9 at the scene, described fiber grating network analyzer 7 connects monitoring computer 8, and described alarm 9 connects fiber grating network analyzer 7.Described CSRC center 10 is arranged in office, described 10 one end, CSRC center connect fiber grating network analyzer 7, the other end at CSRC center 7 is connected to Terminal Server Client 11 by the Internet (Internet), because the CSRC center 10 of office can send to Terminal Server Client 11 by Monitoring Data and landslide early warning signal by Internet, be convenient to upper management personnel and can understand in time field condition and provide corresponding indication.
Between above-mentioned fiber grating network analyzer 7, monitoring computer 8, alarm 9, CSRC center 10, Terminal Server Client 11, with cable, be connected, all parts are all to adopt optical fiber to connect in addition.
In order to make monitoring accuracy in the optical fiber sensing system of the utility model Real-Time Monitoring slope and land slide situation reach requirement, described FBG strain transducer 5 is laid on the main stress reinforcing bar of friction pile 3, in the main glide direction of described friction pile 3, tension and compression-side are respectively selected a longitudinal reinforcement, on longitudinal reinforcement, vertical direction is equidistant is provided with a plurality of FBG strain transducers 5, these FBG strain transducers 5 are together in series by an optical fiber, and from one end, optical fiber is extracted, the optical fiber of drawing is connected on fiber grating analyser 7.In addition, for measuring the FBG temperature sensor 4 of landslide environment temperature, be laid in equally friction pile, and in the position adjacent with FBG strain transducer 5, during layout, will allow FBG temperature sensor 4 parallel with FBG strain transducer 5.
The utility model utilizes photoelectric technology and sensor technology to realize the judgement to the soil body sliding condition of side slope, concrete operations are as follows: on friction pile 3, build FBG strain transducer 5, strain transducer 5 is for measuring the maximum stretching strain of friction pile, above-mentioned FBG strain transducer 5 is to be laid on the main stress reinforcing bar of friction pile 3, installation method is that tension and compression-side respectively select a lengthways main steel bar in the main glide direction of friction pile 3, vertically equidistant (being spaced apart 5m) installs suitable FBG strain transducer 5 in the above, by an optical fiber, be together in series again, above-mentioned optical fiber extracts from one end, the optical fiber of drawing connects fiber Bragg grating (FBG) demodulator 7.FBG temperature sensor 4 is for measuring landslide temperature around, its mounting means is identical with FBG strain transducer 5, installation site is in the adjacent position of FBG strain transducer 5, and and parallel with it, temperature compensation for FBG strain transducer 5, actual temp compensation is after fixing when sensor, then with concrete, friction pile 3 is built, and then the friction pile of building 3 is squeezed into the soil body until basement rock 2.If the friction pile 3 that basement rock is 2 li is fixed constraints, when side slope 1 glides along slipping plane, friction pile 3 is subject to side slope 1 thrust and bends, towards friction pile 3 one sides of side slope 1 glide direction, bear maximum stretching strain, forward friction pile 3 one sides of side slope 1 glide direction one side are born maximum compressive strain, and the FBG strain transducer 5 on friction pile 3 bears draw/compressive strain.
The optical cable of two kinds of FBG sensors is transferred to fiber grating network analyzer 7 by the fiber-optic grating sensor signal on friction pile 3, fiber grating network analyzer 7 demodulates the centre wavelength displacement of FBG sensor and automatically calculates real-time strain and the temperature curve of each monitoring point, test data to monitoring target is analyzed, analysis result and alarming threshold value are contrasted, in the time of necessary, send alerting signal, trigger audible-visual annunciator, on monitoring computer, provide figure warning message simultaneously.Monitoring computer is used to user that real-time strain curve and the graphic picture of landslide early warning are provided, simultaneously also for user provides alarm parameters and some other bound of parameter face of arranging.
The principle of work at field monitoring station is by optical cable 6, the FBG sensor on friction pile to be received to the fiber grating network analyzer 7 of monitoring station, as shown in Figure 2, fiber grating network analyzer 7 is built-in with high power wideband light source, photo-coupler, tunable F-P chamber, photo-detector, data acquisition system (DAS) and data handling system.High power wideband light source sends light through photo-coupler injection fibre grating sensor, after the light that meets launching condition is reflected, then is incorporated in tunable F-P chamber through photo-coupler, converts electric signal to again, and be transferred to data acquisition module after filtering by photo-detector.This data acquisition module comprises 6 large modular units: frequency shift amount computing unit, Wavelet Denoising Method unit, pattern recognition unit, fiber Bragg grating strain sensor temperature compensation unit, Calculation of Bending Deflection unit and information storage and comparing unit.
Above-mentioned data processing module is first given frequency shift amount computing unit by the catoptrical data of each fiber-optic grating sensor, it will be subject to the catoptrical centre wavelength of the fiber-optic grating sensor after temperature, effects of strain and the reflected light centre wavelength of demarcation poor, obtains the side-play amount of reflected light centre wavelength.Then, then the data of processing via Wavelet Denoising Method unit, remove irrelevant signal.Then, then the side-play amount of reflected light centre wavelength temperature being produced on fiber Bragg grating strain sensor via fiber Bragg grating strain sensor temperature compensation unit removes, and only leaves the action effect of strain.Then, then via Calculation of Bending Deflection unit, calculate the sag of friction pile, the sag of friction pile can judge the soil body situation of friction pile surrounding.Finally, then via information storage and comparing unit, it can set alarm threshold value according to user's request, when the parameter value monitoring surpasses alarm threshold value, will send alerting signal, triggers audible-visual annunciator 9, and is monitoring display graphics alerting signal on computer 8.Monitoring computer 8 can also provide alarm parameters and the some other bound of parameter face of arranging for user.The real-time strain of each monitoring point of fiber grating network analyzer 7 outputs and temperature curve show by monitoring computer 8.
The slope and land slide monitor and alarm system that the utility model contains fiber-optic grating sensor is mainly used to monitor the physiological parameters such as the stress of the friction pile surrounding soil body in side slope and temperature, realize real-time automatic collecting analysis and the long-range issue of Monitoring Data, and can automatically according to measured data, determine whether to send early warning signal.The Real-Time Monitoring of side slope has vital effect to the protection of the mankind's life and property.
Claims (5)
1. the optical fiber sensing system of a Real-Time Monitoring slope and land slide situation, the bottom of described side slope is provided with basement rock, in side slope, be provided with friction pile, this friction pile bottom stretches in basement rock, it is characterized in that, this optical fiber sensing system includes optical fiber grating sensing network, on-site supervision chamber, CSRC center and Terminal Server Client, FBG strain transducer and FBG temperature sensor on described friction pile, have been built, this FBG strain transducer and FBG temperature sensor are connected on the indoor fiber grating network analyzer of on-site supervision by monitoring optical cable respectively, in Control Room, be provided with at the scene fiber grating network analyzer, monitoring computer and alarm, described fiber grating network analyzer connects monitoring computer, described alarm connects fiber grating network analyzer, described CSRC center is arranged in office, and described one end, CSRC center connects fiber grating network analyzer, the other end at CSRC center by Internet connection to Terminal Server Client.
2. the optical fiber sensing system of a kind of Real-Time Monitoring slope and land slide situation according to claim 1, it is characterized in that, described FBG strain transducer is laid on the main stress reinforcing bar of friction pile, in the main glide direction of described friction pile, tension and compression-side are respectively selected a longitudinal reinforcement, on longitudinal reinforcement, vertical direction is equidistant is provided with a plurality of FBG strain transducers, a plurality of FBG strain transducers are connected by an optical fiber, and the optical fiber of drawing from one end is connected to fiber grating analyser.
3. the optical fiber sensing system of a kind of Real-Time Monitoring slope and land slide situation according to claim 2, it is characterized in that, for measuring the FBG temperature sensor of landslide environment temperature, be laid in the adjacent position of FBG strain transducer on friction pile, and FBG temperature sensor is parallel with FBG strain transducer.
4. the optical fiber sensing system of a kind of Real-Time Monitoring slope and land slide situation according to claim 1, it is characterized in that, described fiber grating network analyzer includes power wideband light source, photo-coupler, tunable F-P chamber, photo-detector, data acquisition system (DAS) and data handling system, described power wideband light source connects photo-coupler, photo-coupler connects detecting optical cable, detecting optical cable connects the fiber-optic grating sensor on friction pile, photo-coupler is also connected to tunable F-P chamber, tunable F-P chamber connects photo-detector successively, data acquisition module and data processing module.
5. the optical fiber sensing system of a kind of Real-Time Monitoring slope and land slide situation according to claim 4, it is characterized in that, described data acquisition module includes frequency shift amount computing unit, Wavelet Denoising Method unit, pattern recognition unit, fiber Bragg grating strain sensor temperature compensation unit, Calculation of Bending Deflection unit, information storage and comparing unit.
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| CN201320866057.0U CN203758530U (en) | 2013-12-26 | 2013-12-26 | Optical fiber sensing system for timely monitoring landslide condition of slope |
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| CN201320866057.0U CN203758530U (en) | 2013-12-26 | 2013-12-26 | Optical fiber sensing system for timely monitoring landslide condition of slope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727980A (en) * | 2013-12-26 | 2014-04-16 | 无锡波汇光电科技有限公司 | Optical fiber sensing system for monitoring slope landslide condition in real time |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727980A (en) * | 2013-12-26 | 2014-04-16 | 无锡波汇光电科技有限公司 | Optical fiber sensing system for monitoring slope landslide condition in real time |
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| CB03 | Change of inventor or designer information |
Inventor after: Luo Qiaomei Inventor after: Li Ping Inventor after: Xiao Kai Inventor after: Zhang Yanhui Inventor after: Zhao Hao Inventor before: Luo Qiaomei Inventor before: Li Ping Inventor before: Xiao Kai |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LUO QIAOMEI LI PING XIAO KAI TO: LUO QIAOMEI LI PING XIAO KAI ZHANG YANHUI ZHAO HAO |
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| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 214028 Jiangsu province Wuxi city Wuxi District sensor network university science and Technology Park Qingyuan Road career building area C layer Patentee after: WUXI BOHUI PHOTOELECTRONIC TECHNOLOGY CO.,LTD. Patentee after: SHANGHAI BANDWEAVER TECHNOLOGY Co.,Ltd. Address before: 214028 Jiangsu province Wuxi city Wuxi District sensor network university science and Technology Park Qingyuan Road career building area C layer Patentee before: WUXI BOHUI PHOTOELECTRONIC TECHNOLOGY CO.,LTD. Patentee before: Shanghai Bandweaver Technologies Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20171023 Address after: 200120 Shanghai city Pudong New Area Branch Road No. 88 west five building room 503 Patentee after: SHANGHAI BANDWEAVER TECHNOLOGY Co.,Ltd. Address before: 214028 Jiangsu province Wuxi city Wuxi District sensor network university science and Technology Park Qingyuan Road career building area C layer Co-patentee before: SHANGHAI BANDWEAVER TECHNOLOGY Co.,Ltd. Patentee before: WUXI BOHUI PHOTOELECTRONIC TECHNOLOGY CO.,LTD. |
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Address after: Room 103, Building 299, Zhongchen Road, Songjiang District, Shanghai, 20113 Patentee after: Shanghai Bohui Technology Co.,Ltd. Address before: Room 503, 5th floor, West Tower, 88 Shangke Road, Pudong New Area, Shanghai, 200120 Patentee before: SHANGHAI BANDWEAVER TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20140806 |