CN110220816B - Real-time monitoring system for fracture of railway switch rail by using optical fiber line type compound sensor - Google Patents
Real-time monitoring system for fracture of railway switch rail by using optical fiber line type compound sensor Download PDFInfo
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- CN110220816B CN110220816B CN201910340550.0A CN201910340550A CN110220816B CN 110220816 B CN110220816 B CN 110220816B CN 201910340550 A CN201910340550 A CN 201910340550A CN 110220816 B CN110220816 B CN 110220816B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 52
- 238000012544 monitoring process Methods 0.000 title claims abstract description 36
- 150000001875 compounds Chemical class 0.000 title claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 239000011261 inert gas Substances 0.000 claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 239000000853 adhesive Substances 0.000 claims abstract description 6
- 230000001070 adhesive effect Effects 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims description 28
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 239000011368 organic material Substances 0.000 claims description 3
- 241001391944 Commicarpus scandens Species 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/08—Measuring installations for surveying permanent way
- B61K9/10—Measuring installations for surveying permanent way for detecting cracks in rails or welds thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
- G01N33/204—Structure thereof, e.g. crystal structure
- G01N33/2045—Defects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention relates to the technical field of railway track safety monitoring equipment, in particular to an optical fiber linear compound sensor railway switch rail fracture real-time monitoring system which comprises a linear sealing metal capillary, an optical fiber pressure and temperature compound sensor, a transmission optical cable, a signal acquisition and transmission unit, an optical fiber pressure and temperature compound sensing signal demodulation unit and a computer, wherein inert gas is filled in the linear sealing metal capillary, the optical fiber pressure and temperature compound sensor is arranged at one end part of the linear sealing metal capillary, the linear sealing metal capillary is adhered to a track rail web or other easily-broken parts through a high-strength adhesive, the optical fiber pressure and temperature compound sensor is connected with the signal acquisition and transmission unit through the transmission optical cable, the signal acquisition and transmission unit is connected with the optical fiber pressure and temperature compound sensing signal demodulation unit, and the optical fiber pressure and temperature compound sensing signal demodulation unit is connected with the computer. And judging the damage condition of the track switch rail by monitoring the air pressure value of the inert gas.
Description
Technical Field
The invention relates to the technical field of monitoring equipment for railway track safety, in particular to a real-time monitoring system for the fracture of a switch rail of a railway switch by using an optical fiber line type compound sensor.
Background
At present, railway transportation has become a main force of the transportation industry in China, and has an extremely important role in national economy, and in recent years, along with the large-scale running of heavy-load and speed-up trains, accidents caused by railway transportation also occur at some time, the monitoring requirement on infrastructure is higher and higher, the safety operation of the railway transportation is ensured to be vital, a turnout is used as a conversion device for changing and combining the railway lines, the turnout is an indispensable part of the railway lines, and when a turnout switch machine works, the close contact state of a switch rail and a stock rail and whether the switch rail is damaged or not are a fatal factor for influencing the running of the trains, so that a technology for monitoring the state of the switch rail of the railway is generated. Currently, the following methods are available for monitoring the damage degree and the position of a switch tongue:
1) The on-line detection system introduced in the China patent No. CN201810510480.4 'an on-line railway monitoring system and method based on a distributed acoustic sensor', wherein acoustic signals monitored by the distributed acoustic sensor are easily affected by the environment, and the system cannot judge the abnormality degree of a rail;
2) The monitoring system introduced in the 'fiber bragg grating railway switch close-contact monitoring device' of Chinese patent No. CN20110139596. X, the whole monitoring system analyzes the state of a switch tongue through the close-contact state of the switch tongue and a stock rail, and cannot monitor the damage degree and damage parts of the rail.
At present, the track switch rail damage degree and the position monitoring are less in literature, and the damaged position and the damaged degree of the switch rail cannot be monitored simultaneously by the existing monitoring method, so that the rail cannot be maintained timely, and the running of a road is affected.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a real-time monitoring system for the fracture of the switch rail of the optical fiber line type compound sensor railway switch, which can realize the on-line monitoring of the fracture and the damage of the switch rail of the railway switch, improve the maintenance efficiency of the railway and ensure the personal safety and the equipment safety of passengers.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the real-time monitoring system for the fracture of the railway switch tongue of the optical fiber line type compound sensor comprises a line type sealed metal capillary, an optical fiber pressure and temperature compound sensor, a transmission optical cable, a signal acquisition and transmission unit, an optical fiber pressure and temperature compound sensing signal demodulation unit and a computer, wherein inert gas is filled in the line type sealed metal capillary, the optical fiber pressure and temperature compound sensor is arranged on one end part of the line type sealed metal capillary, the line type sealed metal capillary is adhered to a rail web or other easily-fractured parts through high-strength adhesive, the optical fiber pressure and temperature compound sensor is connected with the signal acquisition and transmission unit through the transmission optical cable, the signal acquisition and transmission unit is connected with the optical fiber pressure and temperature compound sensing signal demodulation unit, and the optical fiber pressure and temperature compound sensing signal demodulation unit is connected with the computer.
Furthermore, the composite sensing unit of the optical fiber pressure and temperature composite sensor comprises two types, wherein one type is an optical fiber F-P composite sensing unit, the other type is a pressure and temperature composite sensing unit formed by two FBGs which are connected in series and have different wavelengths, and the two FBGs respectively sense pressure and temperature.
Furthermore, the pipe diameter of the linear sealing metal capillary is 2-5 mm, the pipe wall thickness is about 0.5mm, and the pipe is made of lower metal or organic materials.
Further, the inert gas includes argon gas with a pressure of 0.15-0.35 Mpa.
The invention has the beneficial effects that:
1) The monitoring system judges the damage condition of the track switch rail by monitoring the air pressure value of the inert gas in the linear seal metal capillary, and has simple structure and easy monitoring;
2) The monitoring system adopts a rapid signal processing method to rapidly analyze and judge the acquired data signals, and caches the data and displays the states of the track points in real time;
3) The monitoring system can monitor the damage degree and the fracture position of the switch rails of the plurality of tracks on line in real time, and obtain different characteristic signals to monitor the railway state in real time;
4) The monitoring system adopts an all-fiber detection technology, can avoid electromagnetic interference, is easy to multiplex, can perform quasi-distributed multi-point monitoring, has lower cost and stable and reliable performance, and greatly improves the railway track management level.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a monitoring system.
1. Linear seal metal capillary; 2. an inert gas; 3. an optical fiber pressure and temperature composite sensor; 4. a transmission optical cable; 5. a high strength adhesive; 6. a signal acquisition and transmission unit; 7. the optical fiber pressure and temperature composite sensing signal demodulation unit; 8. and a computer.
Detailed Description
The technical scheme of the invention is described below with reference to the accompanying drawings and examples.
As shown in fig. 1, the real-time monitoring system for the fracture of the railway switch tongue of the optical fiber linear compound sensor comprises a linear sealing metal capillary tube 1, an optical fiber pressure and temperature compound sensor 3, a transmission optical cable 4, a signal acquisition and transmission unit 6, an optical fiber pressure and temperature compound sensing signal demodulation unit 7 and a computer 8, wherein inert gas 2 is filled in the linear sealing metal capillary tube 1, the optical fiber pressure and temperature compound sensor 3 is arranged on one end part of the linear sealing metal capillary tube 1, the linear sealing metal capillary tube 1 is adhered to a rail web or other easily-broken parts through a high-strength adhesive 5, the optical fiber pressure and temperature compound sensor 3 is connected with the signal acquisition and transmission unit 6 through the transmission optical cable 4, the signal acquisition and transmission unit 6 is connected with the optical fiber pressure and temperature compound sensing signal demodulation unit 7, and the optical fiber pressure and temperature compound sensing signal demodulation unit 7 is connected with the computer 8. The above-described forms the basic structure of the present invention.
The invention adopts the structure setting, the optical fiber pressure temperature composite sensor 3 is arranged on one end part of the linear sealing metal capillary 1 to form an optical fiber linear pressure temperature composite sensing probe, the pressure and the temperature of inert gas 2 in the linear sealing metal capillary 1 can be detected in real time, the linear sealing metal capillary 1 is adhered to a rail web or other easily broken parts through a high-strength adhesive 5, when a rail point rail is broken, the linear sealing metal capillary 1 is bent and broken together, so that the pressure of the inert gas 2 monitored by the optical fiber pressure temperature composite sensor 3 is rapidly reduced, the broken parts and the breaking time of the rail can be monitored in real time, pressure signals acquired by the optical fiber pressure temperature composite sensor 3 are transmitted to the signal acquisition and transmission unit 6 through the transmission optical cable 4, and then transmitted to the optical fiber pressure temperature composite sensing signal demodulation unit 7 far away from a rail monitoring chamber of a railway, corresponding digital signals are acquired, the optical fiber pressure temperature composite sensing signal demodulation unit 7 transmits the signals to the computer 8, the damage degree and the damage parts of the rail point rail are compared with preset threshold values, and early warning are realized.
In practical application, inert gas 2 acts on the compound sensitive unit of the optical fiber pressure and temperature compound sensor 3.
In practical application, the optical fiber pressure and temperature composite sensing signal demodulation unit 7 timely decouples the pressure and temperature of the inert gas 2, and when the gas pressure is lower than a preset threshold value, the system alarms.
In practical application, the monitoring system can monitor a large number of switch rail running states simultaneously by adopting the wavelength division, time division and space division mixed multiplexing technology through the same instrument.
In practical application, the monitoring system can monitor the damage degree and the breaking position of the switch rails of the plurality of tracks on line in real time, and obtain different characteristic signals to monitor the railway state in real time.
In practical application, the monitoring system adopts an all-fiber detection technology, can avoid electromagnetic interference, is easy to multiplex, can perform quasi-distributed multi-point monitoring, has lower cost and stable and reliable performance, and greatly improves the railway track management level.
More specifically, the composite sensing unit of the optical fiber pressure and temperature composite sensor 3 includes two types, one is an optical fiber F-P composite sensing unit, the other is a pressure and temperature composite sensing unit formed by two FBGs which are connected in series and have different wavelengths, and the two FBGs respectively sense pressure and temperature.
More specifically, the pipe diameter of the linear sealing metal capillary 1 is 2-5 mm, the pipe wall thickness is about 0.5mm, and the pipe is made of lower metal or organic materials. With such a structural arrangement, the wire-type sealed metal capillary 1 is easily broken.
More specifically, the inert gas 2 includes argon gas having a pressure of 0.15 to 0.35 Mpa.
In practical application, the inert gas 2 can also be other inert gases with the pressure of 0.15-0.35 Mpa.
While the embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, which are intended to be illustrative only and not limiting, and many forms can be made by those of ordinary skill in the art without departing from the spirit of the invention and the scope of the appended claims, which are to be construed as embodying the present invention.
Claims (4)
1. A real-time monitoring system for the fracture of a railway switch rail by using an optical fiber line type compound sensor is characterized in that: the optical fiber pressure and temperature composite sensor comprises a linear sealing metal capillary tube (1), an optical fiber pressure and temperature composite sensor (3), a transmission optical cable (4), a signal acquisition and transmission unit (6), an optical fiber pressure and temperature composite sensing signal demodulation unit (7) and a computer (8), wherein inert gas (2) is filled in the linear sealing metal capillary tube (1), the optical fiber pressure and temperature composite sensor (3) is arranged at one end part of the linear sealing metal capillary tube (1), the linear sealing metal capillary tube (1) is adhered to a rail web or a position easy to break through a high-strength adhesive (5), the optical fiber pressure and temperature composite sensor (3) is connected to the signal acquisition and transmission unit (6) through the transmission optical cable (4), the signal acquisition and transmission unit (6) is connected to the optical fiber pressure and temperature composite sensing signal demodulation unit (7), and the optical fiber pressure and temperature composite sensing signal demodulation unit (7) is connected to the computer (8).
2. The real-time monitoring system for the break of a railway switch tongue with an optical fiber line type compound sensor according to claim 1, wherein: the composite sensitive unit of the optical fiber pressure and temperature composite sensor (3) comprises two types, wherein one type is an optical fiber F-P composite sensitive unit, the other type is a pressure and temperature composite sensitive unit formed by two FBGs which are connected in series and have different wavelengths, and the two FBGs respectively sense pressure and temperature.
3. The real-time monitoring system for the break of a railway switch tongue with an optical fiber line type compound sensor according to claim 1, wherein: the pipe diameter of the linear sealing metal capillary (1) is 2-5 mm, the pipe wall thickness is 0.5mm, and the pipe is made of lower metal or organic materials.
4. The real-time monitoring system for the break of a railway switch tongue with an optical fiber line type compound sensor according to claim 1, wherein: the inert gas (2) comprises argon with the air pressure of 0.15-0.35 mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910340550.0A CN110220816B (en) | 2019-04-25 | 2019-04-25 | Real-time monitoring system for fracture of railway switch rail by using optical fiber line type compound sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910340550.0A CN110220816B (en) | 2019-04-25 | 2019-04-25 | Real-time monitoring system for fracture of railway switch rail by using optical fiber line type compound sensor |
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| Publication Number | Publication Date |
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| CN110220816A CN110220816A (en) | 2019-09-10 |
| CN110220816B true CN110220816B (en) | 2024-03-08 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008134162A (en) * | 2006-11-29 | 2008-06-12 | Akebono Brake Ind Co Ltd | Crash sensing method using pressure sensor |
| CN201126422Y (en) * | 2007-09-20 | 2008-10-01 | 许进 | Active pipe breach monitoring device |
| CN101887000A (en) * | 2010-06-02 | 2010-11-17 | 东华大学 | Hollow fiber pipe pressure measurement-based microcrack monitoring system |
| CN202814826U (en) * | 2012-06-05 | 2013-03-20 | 震宇（芜湖）实业有限公司 | Device for detecting crack defect of plastic part |
| CN105486353A (en) * | 2016-01-19 | 2016-04-13 | 山东科技大学 | Rock mass crack water comprehensive information sensor and use method thereof |
| CN108508097A (en) * | 2017-02-28 | 2018-09-07 | 香港理工大学 | A kind of rail crack monitoring system based on fiber ultrasonic guided wave technology |
| CN210376044U (en) * | 2019-04-25 | 2020-04-21 | 武汉理工大学 | Optical fiber linear composite sensor railway turnout switch rail fracture real-time monitoring system |
-
2019
- 2019-04-25 CN CN201910340550.0A patent/CN110220816B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008134162A (en) * | 2006-11-29 | 2008-06-12 | Akebono Brake Ind Co Ltd | Crash sensing method using pressure sensor |
| CN201126422Y (en) * | 2007-09-20 | 2008-10-01 | 许进 | Active pipe breach monitoring device |
| CN101887000A (en) * | 2010-06-02 | 2010-11-17 | 东华大学 | Hollow fiber pipe pressure measurement-based microcrack monitoring system |
| CN202814826U (en) * | 2012-06-05 | 2013-03-20 | 震宇（芜湖）实业有限公司 | Device for detecting crack defect of plastic part |
| CN105486353A (en) * | 2016-01-19 | 2016-04-13 | 山东科技大学 | Rock mass crack water comprehensive information sensor and use method thereof |
| CN108508097A (en) * | 2017-02-28 | 2018-09-07 | 香港理工大学 | A kind of rail crack monitoring system based on fiber ultrasonic guided wave technology |
| CN210376044U (en) * | 2019-04-25 | 2020-04-21 | 武汉理工大学 | Optical fiber linear composite sensor railway turnout switch rail fracture real-time monitoring system |
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| CN110220816A (en) | 2019-09-10 |
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