CN102997861A - High-speed rail side-slope slide state real-time monitoring system based on distributed optical strain sensing - Google Patents
High-speed rail side-slope slide state real-time monitoring system based on distributed optical strain sensing Download PDFInfo
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Abstract
The invention discloses a high-speed rail side-slope slide state real-time monitoring system based on distributed optical strain sensing. The high-speed rail side-slope slide state real-time monitoring system is characterized by comprising a distributed optical monitoring network, a monitor room, a central monitoring center and a remote client side, wherein the optical monitoring network is arranged on a side slope and connected with the monitoring room through optical fibers, the monitor room is in communication with the central monitoring center through a local area network, and the central monitoring center is in communication with the remote client side through the internet. The high-speed rail side-slope slide state real-time monitoring system has the advantages of: being capable of performing construction and later state maintenance conveniently; being capable of achieving long-distance monitoring within tens of miles; being capable of performing monitoring and early warning on the side-slop slide state in real-time, online, permanent and all-weather mode; being free from electromagnetic interference due to the fact that optical fibers are passive and suitable for application in severe environment.
Description
Technical field
The present invention relates to the distributing optical fiber sensing field, specifically, relate to a kind of system that is used for high ferro slope and land slide situation Real-Time Monitoring based on distributed optical fiber strain sensor.
Background technology
Optical fiber sensing technology is to follow the development of Fibre Optical Communication Technology and develop rapidly at 20 century 70s, and it is a kind of 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 (such as optical fiber micro-bending sensor, optical fiber Fabry-Perot sensor, optical fiber Bragg grating sensor etc.), integrator sensor (such as optical fibre Michelson interferometer and Fiber Mach-Zehnder Interferometer), distributed sensor (such as the Temperature Distribution formula sensor that utilizes Raman scattering effect to make).A kind of as distributed sensor, BOTDR(Brillouin Optical Time-domain Reflectometer), Chinese " Brillouin scattering time domain reflectometer " by name, be a kind of distributive fiber optic strain sensor, the fibre strain in can the tens of kilometer range of continuous coverage is distributed.Distributed fiberoptic sensor based on the Brillouin light time domain reflection technology is a high-end technology of researching and developing in the distributing optical fiber sensing field in recent years successfully, it except anti-electromagnetic interference (EMI) with general optical fiber sensing technology, corrosion-resistant, measurement range is wide, be convenient to be multiplexed into the advantages such as net, miniaturization and maintenance cost are low, the most important thing is to obtain strain and the temperature information of optical fiber any point along the line.
High ferro soil-slope along the line is under the double action of the vibration that rainfall and high-speed train produce, and shallow failure phenomenon very easily occurs for it.Therefore, high ferro side slope health status is carried out Real-Time Monitoring, in advance early warning is realized in the health status of monitoring target, not only can avoid the generation of some accidents, avoid unnecessary casualties and the loss of national wealth, and can effectively save again manual inspection time, reduction human cost.The advantage of BOTDR technology is suitable for the soil-slope health monitoring, and the deformation of grasping side slope dynamically reaches and realizes the landslide early warning, and this has certain realistic meaning to the safe operation that guarantees high ferro.
Summary of the invention
The purpose of this invention is to provide a kind of system that can be used in high ferro soil-slope landslide situation Real-Time Monitoring.But system of the present invention Real-Time Monitoring high ferro deformation of slope, and can automatically determine whether to send side slope healthy early warning signal according to the data that monitor.
The present invention adopts following technical scheme for achieving the above object:
A kind of high ferro slope and land slide condition real-time monitoring system based on the distributive fiber optic strain sensing, it is characterized in that: described system comprises distributed optical fiber sensing network, Control Room, CSRC center and Terminal Server Client; Described fiber-optic monitoring network settings are on side slope, and described fiber-optic monitoring network is connected with Control Room by optical fiber, and Control Room is by LAN (Local Area Network) and CSRC center to center communications, communicate by letter with Terminal Server Client by the Internet in the CSRC center again.
It is further characterized in that: point of fixity and the optical fiber that is connected each point of fixity are arranged in the described distributed optical fiber sensing network, optical fiber is at the approximate snakelike cabling mode of domatic employing, on wiring path, every a segment distance point of fixity is set, described point of fixity adopts drill rod or other easily to knock in the fixed component of the soil body, and the optical fiber that connects each point of fixity sticks together them on fixed component and with bonding agent.
Further: be arranged on the point of fixity at domatic trailing edge top as the monitoring basic point, fixed component is squeezed into herein the soil body degree of depth and is reached at least 1.0m, and in all the other fixed point, fixed component is squeezed into the degree of depth of the soil body at about 0.5m.
Its further feature also is: comprise BOTDR main frame and monitoring computer in the described Control Room, pass through network connection; Described BOTDR main frame receives the soil body deformation data of being sensed at monitored point by optical fiber, and calculates the real-time strain curve of each monitoring point, i.e. the real-time strain curve corresponding with distance; Described BOTDR main frame can accurately be located side slope health status abnormity point and disconnected fine position, by the analysis to the test data of subjects, can set up landslide early warning threshold value on their own by the user, when measured fibre strain variable quantity is that soil body type variable has surpassed landslide early warning threshold value, the BOTDR main frame will send alerting signal.Monitoring computer in the described Control Room, by LAN (Local Area Network) and BOTDR main-machine communication, for the user provides the real-time soil body strain curve corresponding with distance and the graphic picture of the early warning of coming down, also provide alarm parameters and some other bound of parameter faces of arranging for the user simultaneously.
Further: described CSRC center is by LAN (Local Area Network) and BOTDR main-machine communication, and the BOTDR main frame sends to the CSRC center with Monitoring Data and landslide early warning signal again simultaneously; Described CSRC center sends to Terminal Server Client by the Internet with Monitoring Data and landslide early warning signal.
Based on technique scheme, the system that can be used in high ferro soil-slope landslide situation Real-Time Monitoring of the present invention has following technological merit in application:
1. construct and convenient later maintenance: easy for installation, only need optical fiber is imbedded in the slope table layer soil body to be monitored, and every a segment distance point of fixity is set, fixed component can adopt drill rod or other easily to knock in the associated components of the soil body, then optical fiber and fixed component are bonded together, so that every section optical fiber all is in tension; Aspect later maintenance, when causing optical fiber when very large landslide occurs and fractureing, only need send someone on-the-spotly to get final product well with the heat sealing machine fine welding of will breaking.
2. long distance monitoring can be realized, tens of kilometers can be reached.
3. can monitor and early warning the slope and land slide situation real-time, online, permanent, round-the-clockly;
4. optical fiber itself is that electricity is passive, and is not subjected to electromagnetic interference (EMI), is fit to severe environment applications.
Description of drawings
Fig. 1 is the system architecture synoptic diagram that the present invention is used for high ferro slope and land slide situation Real-Time Monitoring.
1,2,3,4,5,6,7,8,9,10,11,12: point of fixity
13: domatic 14: the soil body 15: basement rock 16: front bottom end 17: the trailing edge top
18: optical fiber 19:BOTDR main frame 20: monitoring host computer 21: Control Room
22: CSRC center 23: Terminal Server Client.
Embodiment
Below we by reference to the accompanying drawings 1 and specific embodiment come a kind of high ferro slope and land slide condition real-time monitoring system based on the distributive fiber optic strain sensing of the present invention is described in further detail; use with concrete in the hope of understand its principle of work more clearly, but can not limit protection scope of the present invention with this.
A kind of high ferro slope and land slide condition real-time monitoring system based on the distributive fiber optic strain sensing, described system includes distributed optical fiber sensing network, Control Room 21, CSRC center 22 and Terminal Server Client 23.
Described distributed optical fiber sensing network can adopt the forms such as Rayleigh scattering, Raman scattering and Brillouin scattering, and following embodiment is the distributed optical fiber sensing network based on the Brillouin scattering form.
Point of fixity 1-12 and the optical fiber 18 that is connected each point of fixity are arranged in the described fiber-optic monitoring network, in the described Control Room 21 by BOTDR main frame 19 and monitoring computer 20.Described fiber-optic monitoring network is connected with Control Room 21 by optical fiber, and Control Room 21 is communicated by letter with CSRC center 22 by LAN (Local Area Network), and CSRC center 22 is again by the Internet(the Internet) communicate by letter with Terminal Server Client 23.
In side slope real-time monitoring system of the present invention, as a kind of optimizing design scheme, described fiber-optic monitoring network is laid in domatic 13, in order to realize to whole domatic comprehensive monitoring and reduce quantities that optical fiber 18 has adopted approximate snakelike mode at the wiring path on domatic.Secondly, according to forefathers' research as can be known, under the impact of rainfall, domatic 13 trailing edge can produce larger displacement, and front end movement is less, therefore only at domatic 13 middle part, trailing edge spatial arrangement optical fiber 18, namely apart from wide domatic of trailing edge top 17 8.0m, apart from the wide domatic then laying optical fiber 18 not of front bottom end 16 2.0m; At last, driving depth for point of fixity 1-12 place fixed component also needs careful design, known to forefathers' research, by the side slope superficial that mostly occurs of the landslide due to the rainfall, and deep layer soil body generation deformation is very little even undeformed, therefore be arranged on domatic trailing edge top 17 and squeeze at least 1.0m of the soil body degree of depth as the point of fixity 1,2 of monitoring basic point, the fixed component at 3 and 4 places, guaranteeing that it maintains static relatively, and the fixed component at all the other point of fixity 5-12 places is squeezed into the soil body degree of depth and only need be reached 0.5m and get final product.Described point of fixity 1-12 adopts drill rod or other easily to knock in the fixed component of the soil body, and the optical fiber 18 that connects each point of fixity is on fixed component and with bonding agent that they are together bonding, so that every section optical fiber all is in tension.So laying optical fiber mainly is because optical fiber and soil body surface of contact are very little, friction force is less during this time, optical fiber and the inharmonic problem of soil deformation occur easily, be that the soil body is subjected to displacement and changes and optical fiber does not change along with the soil body, also therefore need on the optical fiber wiring path, every a segment distance point of fixity be set, the soil body just can pass to optical fiber by fixed component when being subjected to displacement and changing, with the purpose of the compatibility of deformation that reaches the optical fiber soil body.One end of described fiber-optic monitoring network directly links to each other with BOTDR main frame in the Control Room.
BOTDR main frame 19 in the described Control Room 21 is based on a distributive fiber optic strain monitoring product of BOTDR know-why.Optical fiber 18 sends BOTDR main frame 19 with the form of light by optical fiber itself at the soil body deformation data of monitored some induction, and it draws the real-time strain curve of each monitoring point through computing, i.e. the real-time strain curve corresponding with distance.BOTDR main frame 19 can accurately be located side slope health status abnormity point and disconnected fine position, so that the maintainer can in time find abnormity point and carry out corresponding work for the treatment of.By the analysis to the test data of subjects, can set up landslide early warning threshold value on their own by the user, when measured fibre strain variable quantity (being soil body type variable) has surpassed landslide early warning threshold value, BOTDR main frame 19 will send alerting signal.Monitoring computer 20 in the described Control Room 21, communicate by letter with BOTDR main frame 19 by LAN (Local Area Network), for the user provides the real-time soil body strain curve corresponding with distance and the graphic picture of the early warning of coming down, also provide alarm parameters and some other bound of parameter faces of arranging for the user simultaneously.
Also can communicate by letter with BOTDR main frame 19 by LAN (Local Area Network) in described CSRC center 22, BOTDR main frame 19 sends to CSRC center 22 with Monitoring Data and landslide early warning signal again simultaneously.
Described CSRC center 22 is by the Internet(the Internet) Monitoring Data and landslide early warning signal can also be sent to Terminal Server Client 23, so that the upper management personnel can in time understand field condition and provide corresponding indication.
Its implementation step is as follows:
The first step: dig groove dark about 20cm at domatic 13 soil bodys 14, along optical fiber 18 wiring paths excavation as shown in fig. 1;
Second step: the place arranges point of fixity along the flute surfaces certain position, and wherein laterally point of fixity interval 3.0m(such as point of fixity 1 and 2 are spaced apart 3.0m), vertically point of fixity interval 4.0m(such as point of fixity 1 and 8 are spaced apart 4.0m); The fixed component of point of fixity adopts the thick drill rod of 40mm, squeeze into vertically the soil body 14 inside, the point of fixity 1,2,3 and 4 that wherein is positioned at the trailing edge top is as the monitoring basic point, in order to guarantee that it maintains static relatively, the drill rod driving depth need reach 1.0m at least, and is 0.5m in all the other point of fixity drill rod driving depths;
The 3rd step: optical fiber 18 is put into the groove that has dug, in fixed point, optical fiber and drill rod are twined 5 ~ 10 circles, and then with instant drying adhesive and pitch that they are bonding;
The 4th step: in loess backfill groove, optical fiber 18 is embedded in the domatic soil body 14;
The 5th step a: end of optical fiber 18 is connected to BOTDR main frame 19 in the Control Room 21;
The 6th step: start BOTDR main frame 19, monitoring computer 20, relevant monitoring of software parameter is set, do the debugging work of a little necessity, then can carry out Real-Time Monitoring and early warning to test slope and land slide situation.
The system of high ferro soil-slope landslide situation Real-Time Monitoring that can be used in of the present invention is for the application of high ferro slope and land slide situation Real-Time Monitoring and early warning, it has stronger operability, it is more complete that monitoring target covers, and can realize real-time, online, round-the-clock, permanently monitor and give warning in advance.It can reduce the manual inspection time greatly, reduces check cost, to guarantee the normal operation of high ferro, ensures national wealth and personnel's life security.
Claims (5)
1. high ferro slope and land slide condition real-time monitoring system based on the distributive fiber optic strain sensing, it is characterized in that: described system comprises distributed optical fiber sensing network, Control Room, CSRC center and Terminal Server Client; Described fiber-optic monitoring network settings are on side slope, and described fiber-optic monitoring network is connected with Control Room by optical fiber, and Control Room is by LAN (Local Area Network) and CSRC center to center communications, communicate by letter with Terminal Server Client by the Internet in the CSRC center again.
2. the high ferro slope and land slide condition real-time monitoring system based on the distributive fiber optic strain sensing according to claim 1, it is characterized in that: point of fixity and the optical fiber that is connected each point of fixity are arranged in the described distributed optical fiber sensing network, optical fiber is at the approximate snakelike cabling mode of domatic employing, on wiring path, every a segment distance point of fixity is set, described point of fixity adopts drill rod or other easily to knock in the fixed component of the soil body, and the optical fiber that connects each point of fixity sticks together them on fixed component and with bonding agent.
3. the high ferro slope and land slide condition real-time monitoring system based on the distributive fiber optic strain sensing according to claim 2, it is characterized in that: be arranged on the point of fixity at domatic trailing edge top as the monitoring basic point, fixed component is squeezed into herein the soil body degree of depth and is reached at least 1.0m, in all the other fixed point, fixed component is squeezed into the degree of depth of the soil body at about 0.5m.
4. the high ferro slope and land slide condition real-time monitoring system based on the distributive fiber optic strain sensing according to claim 1 is characterized in that: comprise BOTDR main frame and monitoring computer in the described Control Room, pass through network connection; Described BOTDR main frame receives the soil body deformation data of being sensed at monitored point by optical fiber, and calculates the real-time strain curve of each monitoring point, i.e. the real-time strain curve corresponding with distance; Described BOTDR main frame can accurately be located side slope health status abnormity point and disconnected fine position, by the analysis to the test data of subjects, can set up landslide early warning threshold value on their own by the user, when measured fibre strain variable quantity is that soil body type variable has surpassed landslide early warning threshold value, the BOTDR main frame will send alerting signal.
5. the high ferro slope and land slide condition real-time monitoring system based on the distributive fiber optic strain sensing according to claim 4, it is characterized in that: described CSRC center is by LAN (Local Area Network) and BOTDR main-machine communication, and the BOTDR main frame sends to the CSRC center with Monitoring Data and landslide early warning signal again simultaneously; Described CSRC center sends to Terminal Server Client by the Internet with Monitoring Data and landslide early warning signal.
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