CN102514594A - High-speed railway highway-over-railway foreign matter invasion monitoring system based on optical fiber - Google Patents
High-speed railway highway-over-railway foreign matter invasion monitoring system based on optical fiber Download PDFInfo
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- CN102514594A CN102514594A CN2011104069036A CN201110406903A CN102514594A CN 102514594 A CN102514594 A CN 102514594A CN 2011104069036 A CN2011104069036 A CN 2011104069036A CN 201110406903 A CN201110406903 A CN 201110406903A CN 102514594 A CN102514594 A CN 102514594A
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Abstract
The invention discloses a high-speed railway highway-over-railway foreign matter invasion monitoring system based on optical fibers, which comprises a control and processing unit and at least one group of detecting system. The detecting system comprises a drive circuit, a laser, an optical fiber, a photoelectric detector and an amplifying circuit; the control and processing unit is sequentially connected with the drive circuit, the laser, the optical fiber, the photoelectric detector and the amplifying circuit in series to form a loop; an alarm device and a communication device are also connected on the control and processing unit; the optical fiber comprises a detecting optical fiber wound on highway-over-railway guardrails; and two terminals of the detecting optical fiber are respectively connected with the laser and the photoelectric detector through transmission optical fiber. The system can send an alarm when a foreign matter breaks the highway-over-railway guardrails, a power supply is not required in a highway-over-railway position, the cost is low, and false alarm is unlikely.
Description
Technical field
The invention belongs to high speed railway safety monitoring technology field, be specifically related to a kind ofly stride iron foreign body intrusion monitoring system based on fiber optic high speed railway public affairs.
Background technology
The high speed railway construction of China starts from Qinhuangdao Shenyang Special Passenger Line of building in 1999.Through the high speed railway constructions in more than 10 years with to the high speed transformation of existing railway; China has had the whole world maximum-norm and the high speed railway net of high overall trip speed at present, and Beijing-Tianjin inter-city, military wide high ferro, Zheng Xi high ferro, Shanghai and Nanjing are intercity, the Shanghai-Hangzhou is intercity, Beijing-Shanghai express railway etc. successively is open to the traffic.Wenzhou motor-car rear-end collision that on July 23rd, 2011 took place is told us, and whenever high ferro safety is always primary.
China is mountain region big country, and disasteies such as avalanche, Rolling Stone are more, and is high to the loss that railway transportation brings.After Rolling Stone or weight intrusion railway clearance, because train operator's visual range is limited, particularly night, can not in time find dangerous situation, the speed of a motor vehicle is fast in addition, and serious derail accident takes place easily, causes huge disaster.Therefore, railway Rolling Stone along the line is monitored with early warning technology automatically and is more come into one's own.The foreign body intrusion alarm technique is as an important leverage of safe railway operation, and domestic and international research personnel have carried out the research of a large amount of explorations.At present, comparatively proven technique mainly contains two kinds: contactless and contact method of inspection.
1, non-contact detection method
The non-contact detection technology is emerging foreign body intrusion detection technique, and each state is all greatly developing, and comprises infrared ray curtain method, GPS method, image method.
(1) infrared ray curtain method.For guaranteeing traffic safety; The highway section of foreign body intrusion (like falling rocks) takes place in the portal etc. in Hispanic high speed railway easily; Junk checking system based on the infrared ray curtain has been installed; Wherein infrared detection system is the important component part of tunnel junk detection alarm system, is divided into infrared light curtain producer and infrared light curtain receptor, will stop infrared light curtain receptor receiving infrared-ray in case falling rocks falls into the safety clearance in tunnel with interior; Thereby excite alert program, this method can detect the foreign matter that size surpasses 0.5m * 0.5m * 0.5m.This method exists rain, mist and snow sky to be difficult to identification, can not forecast that the scene needs power supply, and equipment such as is destroyed easily at shortcoming.
(2) GPS method.Adopt global position system, its field apparatus need safeguard that the scene needs power supply, and signal can't be obtained in special region, can't record geology in-to-in STRESS VARIATION, can't forecast landslide, as carry out the multiple spot monitoring, and this system cost is expensive.
(3) image method.Adopt the outdoor pick-up method, image scene is real-time transmitted on the monitoring device of driver's cab through control monitor unit, the driver can observe locomotive front road conditions at any time under the situation of not leaving operator seat, and is relatively more directly perceived.But rain, mist and snow sky are difficult to identification, can not forecast that the scene also needs power supply, and equipment is destroyed easily.
2, contact method
Contact foreign body intrusion detection techniques such as grille guard have more application in China.Grille guard formula foreign body limit-intruding monitoring system mainly is made up of support, electrical network sensor, field controller and transmission cable etc.During normal operation, electrical network is excellent; When invading railway clearance, the electrical network broken string begins to report to the police when bob thing (like stone etc.) is arranged on the bridge.The electrical network sensor is used for monitoring and the obstruction junk;, object can cause the electrical network broken string when falling on the monitoring electrical network; Be installed on on-the-spot controller and send alerting signal, alarm message takies or faulty condition if the track circuit of this below, zone is expressed as through the laggard control center of falling in lines of relay combination simultaneously; The monitoring unit main frame is sent to the control center with danger signal, and the dispatcher takes counter-measure.
The advantage of contact grille guard technology mainly is when detecting foreign body intrusion, can also play to block junk and drop to the function on the rail, and its shortcoming is to need a large amount of the installation, need install column additional along the bridge both sides, thereby increases bridge construction engineering construction difficulty; Because it is bigger at interval to survey the electrical network triangle distribution, can only detect the big junk of size, then is not easy to detect for wisps such as reinforcing bars.For the Beijing-Shanghai High-Speed Railway camp site; Because the scope that junk occurs in bridge construction process is far longer than bridge itself, so the detection range of 1.5m * 1.5m can not satisfy the parallel demand that detects with leap existing line foreign body intrusion in the Beijing-Shanghai express railway work progress far away.Suspend the empty window phase of transportation simultaneously at railway, allow to invade the limit construction operation, and at this moment grille guard will hinder construction operation.So the grille guard technology is applicable to the railway operation phase, and be not suitable for the construction construction railway clearance safety detection in period.
In addition; Fiber-optic grating sensor is the detection technique of rise in recent years; Optical fiber optical grating stress sensor is laid on the portal or the snipe of landslide takes place easily, through catoptrical detection having been judged whether falling rocks falls into safety clearance and threatens with interior traffic safety is produced.Though it is little that fiber-optic grating sensor has a volume; With optical fiber is compatible, precision is high, the life-span is long, the high reliability advantage; Measurement signal does not receive factor affecting such as light source fluctuating, bending loss of optical fiber, junction loss and detector are aging; Very easily be embedded to object under test inside, realize the high precision of object, glitch-free real-time monitoring.Also can realize the digitalisation sensing, but long-term stable operation under railway depopulated zone, non-electricity zone and rugged environment especially.But this stress sensing net formula detecting device can not detect unsettled in the railway security gauge with interior foreign matter, such as the construction hoist cantilever, newly-built bridge fender bracket etc. are so only be applicable to and detect the long-pending stone of ground junk etc.And because the sensitivity of optical fiber grating valency strain is too high, except stress, temperature also influences very big to the wave length shift of grating, cause wrong report easily, uses so be difficult on the engineering field.
Along with public affairs are striden increasing of iron (highway strides across railway),, will cause accident if the vehicle that goes on the highway is invaded the high speed railway gauge because of clear a fence (crashproof wall) and grille guard (anti-throw net) of out of control or large cargo.
China railways department strides iron section etc. at the parallel section of road and rail, public (bridge) and the rigid protection net is set and the electrical network sensor is installed on the net, in case Rolling Stone breaks grille guard, can alarm to the control center through the mode of electrical network induction.But this traditional electrical network sensing technology existence is subject to the heavy current of the contact system on the railway and the electromagnetic interference of thunder and lightning; The scene needs power supply; Electric signal long-distance transmissions poor reliability, the later stage use and maintenance cost is high, the transmission cable fracture or the problems such as can producing wrong report that has a power failure.Therefore the development of the automatic monitoring of bob thing and early warning technology is extremely urgent in high speed railway.
Summary of the invention
The purpose of this invention is to provide and a kind ofly stride iron foreign body intrusion monitoring system based on fiber optic high speed railway public affairs, can when foreign matter breaks public affairs to stride the iron guard rail, report to the police, it strides the iron place in public affairs does not need power supply, and cost is low, is difficult for wrong report.
The technical scheme that the present invention adopted is; A kind ofly stride iron foreign body intrusion monitoring system based on fiber optic high speed railway public affairs; It is characterized in that; Comprise control and processing unit and at least one group of checking system; Checking system comprises driving circuit, light source, optical fiber, photoelectric detector and amplifying circuit, and control is connected successively with driving circuit, light source, optical fiber, photoelectric detector and amplifying circuit with processing unit and constituted the loop, also is connected with warning device and communication device on control and the processing unit; Optical fiber comprises that being wrapped in public affairs strides the detection fiber on the iron guard rail, and the two ends of detection fiber all are connected with photoelectric detector with light source respectively through Transmission Fibers.
Transmission Fibers and detection fiber are used the optical fiber in the same optical cable.
Transmission Fibers is used the optical fiber in the optical cable, and said detection fiber is used single fiber.
Further, the two ends of detection fiber are connected with Transmission Fibers through fiber active linker.
Light source is semiconductor laser or light emitting diode.
Photoelectric detector is PIN photodiode or avalanche photodide.
Preferably, the quantity of checking system is two groups.
The present invention is based on fiber optic high speed railway public affairs strides the advantage of iron foreign body intrusion monitoring system and be: cost is low, is prone to realize, is difficult for wrong report; Compare with China existing sensor that electricity is installed on grille guard, striding the iron place in public affairs does not need power supply, not disturbed by the heavy current of contact system above the railway and thunder and lightning.
Description of drawings
Fig. 1 is a system chart of the present invention;
Fig. 2 is first kind of optical fiber installation site scheme drawing among the present invention;
Fig. 3 is second kind of optical fiber installation site scheme drawing among the present invention;
Wherein, 1. control and processing unit, 2. warning device, 3. first checking system; 4. first optical fiber, 5. second optical fiber, 6. second checking system, 7. communication device; 8. optical cable, 9. first detection fiber, 10. second detection fiber, 11. public affairs are striden the iron guard rail; 12. highway, 13. railways, 14. stations, 15. fiber active linkers.
The specific embodiment
Stride in iron (being the intersection of highway 12 and the railway 13) process in the construction public affairs, can public affairs be set stride iron grille guard 11, initiatively defend junk according to the landslide scope and the junk track of prediction.
As shown in Figure 1, the present invention is based on fiber optic high speed railway public affairs and stride iron foreign body intrusion monitoring system, comprise control and processing unit 1.Be connected with warning device 2 and communication device 7 on control and the processing unit 1.
In order to improve functional reliability of the present invention, use two groups of checking systems, i.e. first checking system 3 and second checking system 6 in this enforcement.First checking system 3 comprises first driving circuit, first light source, first optical fiber 4, is used for optical signal is converted into first photoelectric detector and first amplifying circuit of electric signal, and control and processing unit 1 and first driving circuit, first light source, first optical fiber 4, first photoelectric detector and first amplifying circuit are connected successively and constituted the loop.First optical fiber 4 comprises that being wrapped in public affairs strides the two ends of first detection fiber, 9, the first detection fiber 9 on the iron guard rail 11 and all be connected with first photoelectric detector with first light source respectively through first Transmission Fibers.
As shown in Figure 2, first Transmission Fibers, first detection fiber 9, second Transmission Fibers and second detection fiber 10 are all used the optical fiber in the optical cable 8.Optical cable 8 is communications optical cable or other optical cable, and dozens or even hundreds of optical fiber is contained in the inside, and each public affairs is striden iron and used two optical fiber to be wrapped on the cooresponding guard rail as detection fiber, and remaining optical fiber gives over to other public affairs of express highway and strides the iron guard rail and use.
As shown in Figure 3; Consider requirement of strength; First detection fiber 9 and second detection fiber 10 also can be used the customization single fiber cable, and first detection fiber 9 is connected with second Transmission Fibers with first Transmission Fibers through fiber active linker 15 respectively with second detection fiber 10.First Transmission Fibers and second Transmission Fibers are all used the optical fiber in the optical cable 8.
The present invention will control with processing unit 1, first driving circuit, first light source, first photoelectric detector, first amplifying circuit, second driving circuit, secondary light source, second photoelectric detector and second amplifying circuit and be installed in the station 14 in use.First light source and secondary light source are semiconductor laser or light emitting diode.First photoelectric detector and second photoelectric detector use PIN photodiode or avalanche photodide.
The present invention strides in public affairs twines first detection fiber 9 and second detection fiber 10 on the iron grille guard 11; At first Transmission Fibers and corresponding first light source and the secondary light source of inserting of second Transmission Fibers, one end, and at corresponding first photoelectric detector and second photoelectric detector of inserting of the other end.Fall public affairs when less junk and stride 11 last times of iron grille guard, can not cause public affairs to stride iron grille guard 11 and damage, public affairs are striden iron grille guard 11 and are played protective action, and first detection fiber 9 does not rupture with second detection fiber 10; When junk is big, can makes public affairs stride iron grille guard 11 and damage, and pound disconnected first detection fiber 9 or/and second detection fiber 10; Corresponding optical fiber circuit breaks off, or/and second photoelectric detector when not receiving optical signal, control produces alerting signal immediately with processing unit and reports to the police through warning device at first photoelectric detector; And report centring system through communication device 7; Through synthesis scheduling system, alarm message is offered comprehensive maintenance scheduler subsystem, train control system simultaneously, by comprehensive maintenance scheduler subsystem issue inspection order; Stop immediately by train control system commander train, notify the related personnel to rush to repair simultaneously.
It is low that the present invention has a cost, is prone to realize, is difficult for wrong report, and striding the iron place in public affairs does not need power supply, not disturbed by the heavy current of the contact system on the railway and thunder and lightning, and the good advantage of Practical Performance.
Claims (7)
1. stride iron foreign body intrusion monitoring system based on fiber optic high speed railway public affairs for one kind; It is characterized in that; Comprise control and processing unit and at least one group of checking system; Said checking system comprises driving circuit, light source, optical fiber, photoelectric detector and amplifying circuit, and said control is connected successively with driving circuit, light source, optical fiber, photoelectric detector and amplifying circuit with processing unit and constituted the loop, also is connected with warning device and communication device on said control and the processing unit; Said optical fiber comprises that being wrapped in public affairs strides the detection fiber on the iron guard rail, and the two ends of said detection fiber all are connected with photoelectric detector with light source respectively through Transmission Fibers.
2. stride iron foreign body intrusion monitoring system according to claim 1 is described based on fiber optic high speed railway public affairs, it is characterized in that said Transmission Fibers and detection fiber are used the optical fiber in the same optical cable.
3. stride iron foreign body intrusion monitoring system according to claim 1 is described based on fiber optic high speed railway public affairs, it is characterized in that, said Transmission Fibers is used the optical fiber in the optical cable, and said detection fiber is used single fiber.
4. stride iron foreign body intrusion monitoring system according to claim 3 is described based on fiber optic high speed railway public affairs, it is characterized in that the two ends of said detection fiber are connected with Transmission Fibers through fiber active linker.
5. stride iron foreign body intrusion monitoring system according to claim 1 is described based on fiber optic high speed railway public affairs, it is characterized in that said light source is semiconductor laser or light emitting diode.
6. stride iron foreign body intrusion monitoring system according to claim 1 is described based on fiber optic high speed railway public affairs, it is characterized in that said photoelectric detector is PIN photodiode or avalanche photodide.
7. describedly stride iron foreign body intrusion monitoring system according to claim 1,2,3,4,5 or 6, it is characterized in that the quantity of said checking system is two groups based on fiber optic high speed railway public affairs.
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| CN104608795A (en) * | 2015-01-29 | 2015-05-13 | 南京大学 | Monitoring system and method for railway track bolt looseness |
| CN105205800A (en) * | 2014-11-28 | 2015-12-30 | 天津光电高斯通信工程技术股份有限公司 | Integrity detection method for graphical model structure of safety net |
| CN108241164A (en) * | 2016-12-26 | 2018-07-03 | 千寻位置网络有限公司 | Track recording method and its device in the global position system positioning empty window phase |
| CN108802053A (en) * | 2018-08-13 | 2018-11-13 | 安徽中源环保科技有限公司 | A kind of device that can detect sound insulation dash-board injury automatically |
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| US6895362B2 (en) * | 2003-02-28 | 2005-05-17 | General Electric Company | Active broken rail detection system and method |
| CN101377408A (en) * | 2007-08-30 | 2009-03-04 | 北京佳讯飞鸿电气股份有限公司 | Apparatus for indirectly measuring steel rail deformation parameter |
| CN101719302A (en) * | 2009-11-17 | 2010-06-02 | 武汉理工大学 | Double-light path double-region fiber foreign matter intrusion monitoring method and device thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105205800A (en) * | 2014-11-28 | 2015-12-30 | 天津光电高斯通信工程技术股份有限公司 | Integrity detection method for graphical model structure of safety net |
| CN105205800B (en) * | 2014-11-28 | 2018-04-03 | 天津光电高斯通信工程技术股份有限公司 | The integrality detection method of the graph model structure of safety net |
| CN104608795A (en) * | 2015-01-29 | 2015-05-13 | 南京大学 | Monitoring system and method for railway track bolt looseness |
| CN108241164A (en) * | 2016-12-26 | 2018-07-03 | 千寻位置网络有限公司 | Track recording method and its device in the global position system positioning empty window phase |
| CN108241164B (en) * | 2016-12-26 | 2021-09-14 | 千寻位置网络有限公司 | Method and device for recording track in positioning empty window period of satellite positioning system |
| CN108802053A (en) * | 2018-08-13 | 2018-11-13 | 安徽中源环保科技有限公司 | A kind of device that can detect sound insulation dash-board injury automatically |
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Application publication date: 20120627 |