CN202257858U - Railway slope dangerous rockfall monitoring and alarm system based on fiber grating sensing technology - Google Patents
Railway slope dangerous rockfall monitoring and alarm system based on fiber grating sensing technology Download PDFInfo
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Abstract
The utility model provides a railway slope dangerous rockfall monitoring and alarm system based on a fiber grating sensing technology, which comprises on-site monitoring equipment. The on-site monitoring equipment comprises an active net protection area rock mass deformation and looseness monitor and a dangerous rockfall monitor, wherein the active net protection area rock mass deformation and looseness monitor is arranged on a slope along the railway, and a flexible passive net is taken as a monitoring carrier by the dangerous rockfall monitor. The railway slope dangerous rockfall monitoring and alarm system based on the fiber grating sensing technology also comprises monitoring control equipment. The monitoring control equipment is connected with the on-site monitoring equipment; the on-site monitoring equipment comprises a rock mass deformation and looseness monitoring subsystem, a rockfall net breaking monitoring and alarm subsystem and a rockfall state monitoring subsystem; the subsystems are respectively connected with the monitoring control equipment; and the monitoring control equipment comprises a fiber terminal box (9), a network switch (11) and a computer system (12) which are connected in sequence. According to the railway slope dangerous rockfall monitoring and alarm system based on the fiber grating sensing technology, the accuracy of the railway dangerous rockfall monitoring and alarm technology is improved, so that the train operating safety is powerfully guaranteed.
Description
Technical field
The utility model is the monitor and alarm system applicable to railway slope crag falling rocks, belongs to optical fiber sensing technology, computer system integrated technology, signal detection technique and railway anti-disaster safety monitoring technology field.
Background technology
China is railway big country; Railway technology development in recent years is rapid, and objective special mileage is more and more longer, and the travelling speed of train is more and more faster; Increasingly high to the traveling security requirement, the automatic monitoring and the early warning technology of railway geologic hazard along the line more and more receive extensive attention.Railway construction is about clearly stipulating in " newly-built speed per hour 300-350 kilometer passenger dedicated railway line design temporary provisions ": passenger dedicated railway line need be provided with the safety monitoring system of taking precautions against natural calamities; Should monitor disaster and foreign body intrusion etc. as required; And provide and close the data (decision informations such as early warning, speed limit, stoppage in transit) of taking precautions against natural calamities; For train operation plan adjustment, driving control provide foundation, guarantee the normal operation of train.The safety monitoring of taking precautions against natural calamities in real time of crag falling rocks is an important content wherein.
Conventional railway security guard technology is active and passive net to be installed stop slope failure, crag falling rocks intrusion rail track, is a kind of single passive protection mode, does not have warning function, in case disaster takes place, protection network is washed out, with regard to the entail dangers to traffic safety.Falling rocks early warning of side slope crag and alert detecting technology; Part Study and application have been carried out both at home and abroad; But because railway geological condition along the line is complicated, electromagnetic interference (EMI) is serious, power taking is difficult, signal transmits mal-conditions such as far away; Add the strict demand that it is failed to report and report by mistake system, also rarely found to the technology of railway slope crag falling rocks monitoring and warning warning at present.
Current railway slope crag falling rocks monitoring, alarming technical research mainly is divided into initiatively two kinds of early warning and monitorings and passive alert detecting.Initiatively early warning and monitoring is pointed out with early warning information before the loosening disaster of rock mass takes place.GPS (GPS) displacement monitoring technology is adopted in loosening in early days monitoring to crag at present, and this technology is to be the radio-navigation positioning system on basis with the satellite.Gps satellite emission distance measuring signal and navigation message; The user at a time receives 3 above gps satellite signals simultaneously with the GPS receiver; Measure the distance of survey station o'clock to 3 satellites and calculate the volume coordinate of the gps satellite in this moment, utilize the position that calculates measuring point apart from intersection in view of the above.Use should technology, and the scene needs power supply and regular maintenance, and signal can't be obtained in special region; Particularly can't record the STRESS VARIATION of rock interior, so can't forecast to the landslide falling rocks.Carry out the multiple spot monitoring like need, then this system cost is expensive, and stolen easily.
Passive monitoring is to give and alarm message reminding after disaster takes place there being the rock stratum to come off.Major technique has: technological means such as power network monitoring, video monitoring.Power network monitoring is protection network to be set in advance and the electrical network sensor is installed on the net, in case foreign matter breaks protection network, can report to the police to the dispatching center through the mode of electrical network induction.Video monitoring is to adopt image observation method monitoring falling rocks situation, though directly perceived, inclement weather hypograph sharpness such as rain, mist and snow are difficult to guarantee, are difficult to identification, and the scene needs power supply, and equipment is destroyed easily.
The common feature of electricity such as above-mentioned active early warning and monitoring and passive alert detecting type monitoring technology is: environment for use is had relatively high expectations, be subject to the influence of various disturbing factors, serviceable life is short, can't carry out using at a distance, on a large scale etc.
Prior art also comprises the manual inspection method, and this method can only detect the state in rock mass early stage, can not real-time prediction, and have artificial subjectivity, and detect and only can qualitatively be difficult to accurate quantification.To sum up, do not have the reliable means of testing applicable to the monitoring of railway slope crag at present temporarily, yet temporary needleless is to the monitor and alarm system based on fiber grating sensing technology of this monitoring requirements.
In a word, existing side slope crag falling rocks monitor and alarm system, the main shortcoming that exists is: the technical characterstic of system can't satisfy the low requirement of failing to report and reporting by mistake of railway operation; Electricity type anti-interference, the power taking of technology, signal transmission, difficult in maintenance.
Summary of the invention
The utility model technical matters to be solved is: a kind of railway slope crag falling rocks monitor and alarm system based on fiber grating sensing technology is provided; To the problem that existing railway slope falling rocks monitoring technology exists, the utility model can solve following key technical problem: solved that existing railway slope falling rocks monitor and alarm system can only passively carry out alert detecting and can not active early warning and monitoring problem; Solved the existing railway slope crag falling rocks monitoring system monitoring electrical sensor inclement weather problem of operate as normal continuously at the scene; Existing anti-electromagnetic interference (EMI) of railway slope monitoring system monitor signal and long-distance transmissions problem have been solved; Solved under the single monitoring means of railway slope monitoring system, failed to report the problem high easily with rate of false alarm.
The technical scheme that the utility model adopted is: based on the railway slope crag falling rocks monitor and alarm system of fiber grating sensing technology; Comprise on-site monitoring equipment; On-site monitoring equipment comprises the loosening monitoring of the active net guard plot rock mass deformation that side slope along the railway is set and serves as the crag falling rocks monitoring of monitoring carrier with the passive net of flexibility; It also comprises the monitoring opertaing device, and the monitoring opertaing device links to each other with on-site monitoring equipment; On-site monitoring equipment comprises rock mass deformation and loosening monitoring subsystem, falling rocks score a goal monitoring, alarming subsystem and falling rocks status monitoring subsystem, and these subsystems all link to each other with the monitoring opertaing device; The monitoring opertaing device comprises optical fiber terminal box, the network switch and the computer system that links to each other successively.
Described monitor and alarm system, rock mass deformation links to each other with optical fiber terminal box with loosening monitoring subsystem, and it adopts the fiber optical grating intelligent anchor pole, and it is penetrated squeezes into side slope and initiatively net domatic weathered rock formation, guard plot.
Described monitor and alarm system; The fiber optical grating intelligent anchor pole comprises twisted steel anchor rod, fiber Bragg grating strain sensor, fiber-optical grating temperature sensor and light signal output protection device; Fiber Bragg grating strain sensor and fiber-optical grating temperature sensor all are arranged on the twisted steel anchor rod; Light signal output protection device is arranged on a termination of twisted steel anchor rod, and fiber Bragg grating strain sensor all links to each other with optical fiber terminal box through light signal output protection device, signal light transmission cable with fiber-optical grating temperature sensor.
Described monitor and alarm system, the falling rocks monitoring, alarming subsystem that scores a goal links to each other with optical fiber terminal box, and it comprises passive net vibration monitoring sensor and the fiber grating monitoring sensing net that scores a goal, and it is online that the two all is arranged on flexible passive protection.
Described monitor and alarm system; Passive net vibration monitoring sensor is connected to wideband light source and detuner; Detuner comprises continuous optical fibre Fabry-perot chamber and arithmetic facility, also is connected to isolator and three-dB coupler between passive net vibration monitoring sensor and wideband light source, the detuner successively.
Described monitor and alarm system, falling rocks status monitoring subsystem comprises fiber grating tension pick-up and video monitoring system; The fiber grating tension pick-up is held on drawing on the anchor line of flexible passive protection net, and links to each other with optical fiber terminal box; Video monitoring system links to each other with the network switch.
Described monitor and alarm system, system extension have the expansion equipment that links to each other with the network switch of monitoring opertaing device; Expansion equipment comprises track division supervisory computer, road bureau's supervisory computer and the warning/chain output device of driving a vehicle.
The utility model has been taked initiatively and passive two kinds of monitoring measures to the slope reinforcement safeguard procedures.Active monitoring adopts intelligent anchor pole that the rock mass internal stress is monitored to the loose or dislocation that waste mantle possibly occur; Passive monitoring is to the crag falling rocks, and is damaged to the vibration of passive protection net wire side, wire side, draw anchor line tension force to monitor.
Based on the railway slope crag falling rocks monitoring system of fiber grating sensing technology, compare existing monitoring system and have following several characteristics:
(1) main monitoring project has all adopted fiber grating sensing technology; Have corrosion-resistant, anti-electromagnetic interference (EMI), safe and reliable, collection sensing be transmitted in advantage such as one; Detection, transmission signals belong to wavelength-modulated; Use wavelength-division multiplex technique, capacity is big, is easy to constitute sensing network and realizes the synchronous sensing measurement of multiparameter.
(2) with the traditional monitoring compared with techniques, realized on-the-spot no electro-detection, cost is low, non-maintaining, but the signal long-distance transmissions is specially adapted to engineering long-term safety on line monitoring, especially rugged environments such as railway depopulated zone, non-Electric region.
(3) monitoring system has adopted the score a goal monitoring technology of two kinds of different principle of vibration of protection network falling rocks and falling rocks; Simultaneously passive net is monitored; The wrong report of avoiding monotechnics to occur; Greatly limit has reduced system's rate of false alarm, and the monitoring Fibre Optical Sensor is integral with the passive protection net form, and effectively minimizing is failed to report.
(4) System self-test function, multistage group alarm strategy and video interlink function have guaranteed the stability and the reliability of system, for including the driving interlocking in reliable basis are provided.
The utility model has not only overcome the many shortcomings of existing monitoring system; More the research of railway slope falling rocks monitoring system provides a new way and direction; Promoted the accuracy of railway crag falling rocks alert detecting technology, made train operation safety obtain more sound assurance.
The beneficial effect of the utility model is:
Native system is monitored monitoring, early warning, warning and realtime graphic transmission to railway slope crag falling rocks through grating fibers sensor and video interlink, can in time find and dispose railway slope crag falling rocks disaster incident, and can realize the multi-cascade control through network.Difficult problems such as the development of native system has solved failing to report of in railway slope crag falling rocks security protection work, existing for many years, reports by mistake, transmission and power supply, to ensure railway operation safety particularly the mountain railway traffic safety played than the reliable guarantee effect.Native system can be set up the railway slope information system database simultaneously, can be the side slope regulation rational decision information is provided.Native system is laid simple, and is easy to use, reliable and stable, and the utilization maintenance cost is low, can effectively prevent and reduce railroad train and hit and touch down the stone disaster accident and take place, and loss has significant meaning with national wealth to assuring the safety for life and property of the people.
Description of drawings
Fig. 1 is a railway slope crag falling rocks monitor and alarm system structural drawing.
Fig. 2 is fiber optical grating intelligent anchor structure figure.
Fig. 3 is a fiber grating falling rocks monitoring sensing technology principle.
Fig. 4 is the fiber grating falling rocks monitoring sensor synoptic diagram of layouting.
Fig. 5 (a) and (b) are respectively that the falling rocks monitoring fiber grating that scores a goal scores a goal monitoring sensing network arrangements synoptic diagram and A thereof to enlarged drawing.
Fig. 6 is based on the protection network falling rocks condition discrimination principle of fiber grating tension pick-up.
Have among the figure: initiatively net guard plot 1; Fiber optical grating intelligent anchor pole 2; Twisted steel anchor rod 2-1; Fiber Bragg grating strain sensor 2-2; Fiber-optical grating temperature sensor 2-3; Light signal output protection device 2-4; Passive protection net 3; Passive net vibration monitoring sensor 4; The fiber grating monitoring sensor 5 that scores a goal; Fiber grating tension pick-up 6; Signal light transmission cable 7; Video monitoring system 8; Optical fiber terminal box 9; Fiber grating demodulator of PM signal PM 10; The network switch 11; Computer system 12; Track division supervisory computer 13; Road bureau's supervisory computer 14; The chain output 15 of warning/driving; Fiber-optic grating sensor 16; Metal band 17; Optical fibre Fabry-perot chamber 18; Wideband light source 19; Isolator and three-dB coupler 20.Among Fig. 3, S
1-S
nBe 1-n fiber-optic grating sensor, λ
1-λ
nBe the wavelength of correspondence, arithmetic facility has totalizer, multiplier and subtracter.Among Fig. 6, (a)-(d) be respectively state 1-state 4.
Embodiment
The utility model has been developed the railway slope crag falling rocks monitor and alarm system based on fiber grating sensing technology; This system of effectively reducing of system fails to report and reports by mistake; Characteristics such as have that reliability height, antijamming capability are strong, long distance of signal transmission, no electro-detection are non-maintaining; For railway safe driving provides safety guarantee, be to the take precautions against natural calamities important supplement of safety monitoring system of existing railway.
This programme is mainly monitored the slow stressed variation of slope rock mass waste mantle, and impact of crag falling rocks and the damaged situation of wire side are reported to the police, and has video monitoring interlock.Monitoring Data input computing machine is handled the early warning of output acousto-optic, alerting signal and video interlink observation through special software.Monitor signal can pass through the LAN teletransmission to Surveillance center such as track division and Railway Bureaus, and has warning functions such as note, phone, and its system architecture is as shown in Figure 1.
Monitor and alarm system mainly is made up of following components:
(1) based on the rock mass deformation and the loosening monitoring subsystem of fiber optical grating intelligent anchor pole;
(2) based on the falling rocks of the fiber grating sensing technology monitoring, alarming subsystem that scores a goal;
(3) based on the falling rocks status monitoring subsystem of fiber grating tension pick-up and video monitoring;
(4) based on the railway slope crag falling rocks monitoring system of fiber grating sensing technology.
Based on the railway slope crag falling rocks monitoring system of fiber grating sensing technology, be the monitoring system of long-range, long-term a, real-time online.The side slope scene need not power supply; The light signal that the wideband light source of pulpit sends arrives all kinds of fiber-optic grating sensors through transmission cable (20KM farthest) teletransmission; Pass the pulpit after reflection again back, by computer acquisition, image data uploads onto the server and handles and analyze after the fiber grating demodulation device carries out the signal demodulation; Handle output monitoring result and alerting signal through special software, and can trigger the video monitoring signal observation that links.Monitoring and warning message can be realized remote live on-line monitoring and management through the LAN teletransmission to Surveillance center such as track division, Railway Bureaus.
Embodiment:
1. based on the rock mass deformation and the loosening monitoring subsystem of fiber optical grating intelligent anchor pole
The distortion of waste mantle rock mass and the loosening traffic safety that can seriously jeopardize railway are in order to monitor distortion and the loosening state of reinforcing the back rock mass.This subsystem has been developed the fiber optical grating intelligent anchor pole based on the Fibre Optical Sensor principle; It is penetrated squeeze into side slope and initiatively net bank protection face weathered rock formation zone, can realize carrying out the stressing conditions monitoring of each weathered rock formation, piece zone along the distribution and the state of development of anchor pole axially loaded through monitoring.Fig. 2 is fiber optical grating intelligent anchor structure figure.The length of anchor pole is confirmed according to the on-the-spot geological exploration situation of monitoring, can be adopted reinforcing bar or wirerope.
Single anchor pole carries out the division of early warning importance according to the buried depth of force-detecting position and the force-detecting position number of exceeded threshold.When early warning value is provided with, at first need gather and add up the extreme value of each measuring point of anchor pole in the certain hour interval, with the bound of certain fiducial interval of cumulative statistics amount as the early warning limit value.For reducing the wrong report incident that local measuring point causes unusually, anchor pole can be divided into the zones of different band, and early warning is carried out in the subregion.When the anchor pole that early warning information takes place in the band of zone surpassed requiring of preset threshold, just to this monitored area prompting early warning, the linkage vision signal was observed and is kept watch on.The stressed Monitoring Data of monitored area inner fiber grating intelligence anchor pole of long-term accumulation; Can be used for making up the monitor database of different depth place, difference position, side slope weathered rock formation power statistical indicator, the early warning analysis method of setting up based on this database can be the later stage and differentiates the waste mantle deformation monitoring forecast that comes off service is provided.
2. based on the falling rocks of the fiber grating sensing technology monitoring, alarming subsystem that scores a goal
(1) know-why
The falling rocks monitoring, alarming that scores a goal is the emphasis and the core content of native system research.With the passive net of flexibility is monitoring target, the research of carry out falling rocks respectively, score a goal, falling rocks scoring a goal the warning aspect.In order to improve the reliability of system alarm, optical fiber sensor network and protection network are connected as a single entity, realize that net is broken fine disconnected, avoided system to fail to report effectively.For greatly reducing rate of false alarm; Designed fiber grating falling rocks vibration transducer and the fiber grating sensing net that scores a goal; Two types of sensors are laid in simultaneously passive online, only vibrate and score a goal when taking place simultaneously when falling rocks, system just sends warning; This group alarm mode has greatly reduced system's wrong report, is superior to traditional monitoring mode.
When the side slope falling rocks is invaded the protection network meeting, can cause that flexible passive protection web frame presents the operation mode of AD HOC.Catch the protection network mode variation that falling rocks causes through on protection network, arranging optical fibre vibration sensor.Like Fig. 3; The broadband optical signal that wideband light source sends is transferred on the sensing grating of serial connection through isolator and three-dB coupler; After the wavelength selection through these fiber gratings, the narrow band light of one group of different wave length is reflected, and reflected light is received by signal processor through three-dB coupler once more.When falling rocks took place, fiber grating falling rocks monitoring sensor was along with the motion together of protecting wire net, and the resonance wavelength of fiber grating is drifted about; Its drift value is measured by the Wavelength demodulation device; And import computing machine and carry out analyzing and processing, and, send early warning, alerting signals such as acousto-optic through after the analysis of system software intelligent comparison; The signal of output alarm interlock simultaneously drives relevant device motion, like interlock camera, driving etc.
In order further to reduce rate of false alarm; This subsystem has used fiber grating to score a goal and has monitored the sensing net; It evenly is knitted to passive net forms monitoring light net, because monitoring optical cable intensity is far below passive net, when the invasion of side slope falling rocks is scored a goal; Fiber-optic monitoring net in the mesh grid also will score a goal, and whether the break-makes through the different net of instrument monitoring sheet light net signal can the Primary Location falling rocks be scored a goal takes place and generation area.The fiber-optic grating sensor of two types of monitoring purposes is placed in a slice net, is superior to the traditional monitoring arrangement, and this group alarm mode reliability is high, rate of false alarm is low.
(2) monitoring is layouted
With 10 meters of length, high 4 meters protection networks is example, and the installation of layouting of falling rocks monitoring sensor is as shown in Figure 4, and the setting height(from bottom) of sensor is 2.5 meters, and every screen cloth is established 4 of fiber-optic grating sensors, and its arrangement pitch is 2 meters.Link to each other with optical cable between the fiber-optic grating sensor; Confirm the series connection quantity of sensor according to the wavelength bandwidth of demodulator of PM signal PM, the wavelength spacing of sensor; Demodulator bandwidth 40nm for example, the wavelength spacing 2nm of sensor, the maximum quantity of theoretical series connection quantity is 20.After the sensor groups string was accomplished, an end was connected with the signal light transmission cable, and through transmission cable, monitor signal is passed Control Room back.
The monitoring scheme of the monitoring sense light of scoring a goal net is as shown in Figure 5.Light net optical cable arranges that along passive net grid wirerope each node is fixed with the metal band, can not produce relative slip between assurance light net and the passive net, the light net two ends fiber-optic grating sensor of respectively connecting.Net sheet group string principle is identical with the epimere explanation with the signal transmission.
3. based on the falling rocks status monitoring subsystem of fiber grating tension pick-up and video monitoring
(1) know-why
In order to monitor the duty that falling rocks does not score a goal, adopted the monitoring mode of fiber grating tension pick-up and video interlink.The fiber grating tension pick-up is held on passive net draws on the anchor line, can realize monitoring such structural stress state.When falling rocks does not score a goal; Whether the change of protection network operation mode can cause the corresponding change of drawing the anchor line structure stress, therefore, draw the different stressed monitoring curve of anchor line all to invade with falling rocks like Fig. 6; Corresponding mapping relations are arranged between whether scoring a goal, and (state 1 expression state is normal; State 2 expressions undertake falling rocks, and state 3 expression falling rocks rebound or falling rocks scores a goal, and state 4 expressions are accepted the falling rocks load and descended).The video monitoring of native system adopts the triggering mode interlock based on the sensor monitoring signal, thereby has intelligent subjectivity.When falling rocks took place, the video monitoring function was activated, and the falling rocks state is carried out video image check.
(2) monitoring is layouted
Reinforce the quantity of drawing anchor line according to passive net; Every reinforcing is drawn one of fiber grating tension pick-up is installed on the anchor line; The fixedly basis of sensor is drawn the specification of anchor line; Adopt the fastener of corresponding specification to fix, and can be aided with alternate manner and reinforce, guarantee sensor and draw not produce relative displacement between the anchor line.Connect with optical cable between the tension pick-up, group string principle is introduced identical with signal transmission form with last joint.When the tension force increase and decrease surpasses preset threshold, system's output alarm signal.
Video frequency monitoring system is installed near the side slope, and Hardware configuration and installation site are checked and are advisable can satisfy video image.
4. based on the railway slope crag falling rocks monitoring system of fiber grating sensing technology
This system is made up of on-the-spot sensing testing instrument, pulpit equipment, supervision and management center monitoring terminal.
(1) on-the-spot sensing testing instrument
On-the-spot sensing testing instrument mainly is made up of score a goal monitoring sensing net, optical cable and fiber optic closure of fiber optical grating intelligent anchor pole, fiber grating falling rocks monitoring sensor, fiber grating tension pick-up, fiber grating.Each regional sensor is connected to fiber optic closure after connecting through optical cable, is connected with the pulpit acquisition station through optical cable again.
(2) pulpit equipment
Pulpit equipment is made up of hardware and software.Hardware system is made up of collecting computer, server, fiber grating demodulation device, the network switch, fibre junction terminal etc.; Software systems are made up of softwares such as the drive software of various hardware devices, communication software, database software, monitoring and warning warning, assessments.
(3) terminal device
At Railway Bureau, track division the monitoring, alarming terminal is set respectively.Can receive alerting signal, and check monitoring information.System construction drawing is as shown in Figure 1.
Present technique is passed through the in-problem in-depth analysis of existing monitoring technology means; In conjunction with flexible protective web frame characteristics and optical fiber sensing technology can be remote, non-relay, adapt to technical advantages such as abominable working environment, anti-electromagnetic interference (EMI); Developed railway slope crag falling rocks monitoring system, and proposed to establish principle, monitoring scheme and implementation step based on the sensing screen cloth of each subsystem based on fiber grating sensing technology.Its innovation point is following:
(1) proposed first to lay principle and monitoring embodiment based on the railway slope crag falling rocks monitoring system and the monitoring net sensor of fiber grating sensing technology;
(2) the monitoring crag falling rocks alarm method of the railway slope falling rocks based on fiber grating of low rate of false alarm, the dual signal of scoring a goal combination has been proposed first;
(3) researched and developed first and be applicable to railway slope, the fiber optical grating intelligent anchor pole that can the slow mechanical property of perception rock mass changes.
Claims (7)
1. based on the railway slope crag falling rocks monitor and alarm system of fiber grating sensing technology; Comprise on-site monitoring equipment; On-site monitoring equipment comprises the loosening monitoring of the active net guard plot rock mass deformation that side slope along the railway is set and serves as the crag falling rocks monitoring of monitoring carrier with the passive net of flexibility; It is characterized in that: it also comprises the monitoring opertaing device, and the monitoring opertaing device links to each other with on-site monitoring equipment; On-site monitoring equipment comprises rock mass deformation and loosening monitoring subsystem, falling rocks score a goal monitoring, alarming subsystem and falling rocks status monitoring subsystem, and these subsystems all link to each other with the monitoring opertaing device; The monitoring opertaing device comprises optical fiber terminal box (9), the network switch (11) and the computer system (12) that links to each other successively.
2. monitor and alarm system according to claim 1; It is characterized in that: rock mass deformation links to each other with optical fiber terminal box with loosening monitoring subsystem; It adopts fiber optical grating intelligent anchor pole (2), and it is penetrated squeezes into side slope and initiatively net domatic weathered rock formation, guard plot (1).
3. monitor and alarm system according to claim 2; It is characterized in that: the fiber optical grating intelligent anchor pole comprises twisted steel anchor rod (2-1), fiber Bragg grating strain sensor (2-2), fiber-optical grating temperature sensor (2-3) and light signal output protection device (2-4); Fiber Bragg grating strain sensor (2-2) and fiber-optical grating temperature sensor (2-3) all are arranged on the twisted steel anchor rod (2-1); Light signal output protection device (2-4) is arranged on a termination of twisted steel anchor rod (2-1), and fiber Bragg grating strain sensor (2-2) all links to each other with optical fiber terminal box (9) through light signal output protection device (2-4), signal light transmission cable (7) with fiber-optical grating temperature sensor (2-3).
4. monitor and alarm system according to claim 1; It is characterized in that: the falling rocks monitoring, alarming subsystem that scores a goal links to each other with optical fiber terminal box (9); It comprises passive net vibration monitoring sensor (4) and fiber grating score a goal the monitoring sensing net (5), the two all is arranged on the flexible passive protection net (3).
5. monitor and alarm system according to claim 4; It is characterized in that: passive net vibration monitoring sensor (4) is connected to wideband light source and detuner; Detuner comprises continuous optical fibre Fabry-perot chamber (18) and arithmetic facility, also is connected to isolator and three-dB coupler (20) successively between passive net vibration monitoring sensor (4) and wideband light source (19), the detuner.
6. monitor and alarm system according to claim 1 is characterized in that: falling rocks status monitoring subsystem comprises fiber grating tension pick-up (6) and video monitoring system (8); Fiber grating tension pick-up (6) is held on drawing on the anchor line of flexible passive protection net (3), and links to each other with optical fiber terminal box (9); Video monitoring system (8) links to each other with the network switch (11).
7. monitor and alarm system according to claim 1 is characterized in that: also be connected to fiber grating demodulator of PM signal PM (10) between the optical fiber terminal box (9) and the network switch (11); Said monitor and alarm system expansion has the expansion equipment that links to each other with the network switch (11), expansion equipment to comprise track division supervisory computer (13), road bureau's supervisory computer (14) and the chain output device (15) of reporting to the police/drive a vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011203900649U CN202257858U (en) | 2011-10-14 | 2011-10-14 | Railway slope dangerous rockfall monitoring and alarm system based on fiber grating sensing technology |
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| CN2011203900649U CN202257858U (en) | 2011-10-14 | 2011-10-14 | Railway slope dangerous rockfall monitoring and alarm system based on fiber grating sensing technology |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102354433A (en) * | 2011-10-14 | 2012-02-15 | 武汉理工光科股份有限公司 | Railway side slope crag rockfall monitoring and warning system based on fiber grating sensing technology |
| CN102975746A (en) * | 2012-12-31 | 2013-03-20 | 北京佳讯飞鸿电气股份有限公司 | Tunnel foreign body monitoring system for railway disaster prevention |
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| CN109238319A (en) * | 2018-07-23 | 2019-01-18 | 中国船舶重工集团公司第七〇五研究所 | A kind of optical fiber sound temperature and pressure compound sensor |
| CN110095176A (en) * | 2019-03-29 | 2019-08-06 | 石家庄铁道大学 | A kind of safety monitoring slope method, system and terminal device |
| CN111157026A (en) * | 2020-02-12 | 2020-05-15 | 太原理工大学 | Distributed optical fiber sensing detection device and method for railway rockfall protection net |
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- 2011-10-14 CN CN2011203900649U patent/CN202257858U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354433A (en) * | 2011-10-14 | 2012-02-15 | 武汉理工光科股份有限公司 | Railway side slope crag rockfall monitoring and warning system based on fiber grating sensing technology |
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