CN117073825A - High-speed railway protection line monitoring system based on optical fiber comprehensive sensing technology - Google Patents
High-speed railway protection line monitoring system based on optical fiber comprehensive sensing technology Download PDFInfo
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- CN117073825A CN117073825A CN202311031805.8A CN202311031805A CN117073825A CN 117073825 A CN117073825 A CN 117073825A CN 202311031805 A CN202311031805 A CN 202311031805A CN 117073825 A CN117073825 A CN 117073825A
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- protection line
- optical fiber
- oppw
- type pressure
- speed rail
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 59
- 238000012544 monitoring process Methods 0.000 title claims abstract description 33
- 238000005516 engineering process Methods 0.000 title claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 5
- 239000000835 fiber Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 4
- 238000007689 inspection Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- TVZRAEYQIKYCPH-UHFFFAOYSA-N 3-(trimethylsilyl)propane-1-sulfonic acid Chemical compound C[Si](C)(C)CCCS(O)(=O)=O TVZRAEYQIKYCPH-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
- G01L1/246—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using integrated gratings, e.g. Bragg gratings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a high-speed rail protection line monitoring system based on an optical fiber comprehensive sensing technology, which replaces the position and the effect of a PW protection line in an application scene of the high-speed rail protection line with the OPPW protection line, monitors signals such as vibration, stress, strain and the like of the high-speed rail protection line in real time by a point-type pressure sensor, a distributed optical fiber vibration sensing system, a distributed optical fiber stress strain sensing system and a demodulator, acquires the health state of the high-speed rail protection line in real time, replaces manual inspection, and further improves the intelligent monitoring and operation management level of an electrified railway.
Description
Technical Field
The invention relates to the field of high-speed railway protection line monitoring, in particular to a high-speed railway protection line monitoring system based on an optical fiber integrated sensing technology.
Background
The traditional protection wire used along the high-speed rail is aluminum clad steel-cored aluminum stranded wire (PW wire). The high-speed rail can vibrate PW lines along the line, and faults such as broken wires, broken strands and even broken wires can occur in the PW lines when the high-speed rail works on line for a long time.
The existing main monitoring means is to mount the vertical rod along the railway in the skylight period of the high-speed railway at night in a manual inspection mode, open the PW wire clamp, observe the state of the protection wire, if the protection wire is damaged, repair or replace the protection wire on site, and cannot monitor the health state of the protection wire in real time.
Disclosure of Invention
The purpose of the invention is that: the monitoring system for the high-speed rail protection wire based on the optical fiber integrated sensing technology is used for monitoring vibration, stress and strain of the high-speed rail protection wire in real time by utilizing the optical fiber integrated sensing technology, and acquiring the health state of the protection wire in real time.
In order to achieve the functions, the invention designs a high-speed railway protection line monitoring system based on an optical fiber integrated sensing technology, which comprises an OPPW protection line, a point type pressure sensor, a distributed optical fiber vibration sensing system, a distributed optical fiber stress strain sensing system and a demodulator;
the method comprises the steps that the OPPW protection line is used for replacing the position and the effect of the PW protection line in an application scene of the high-speed rail protection line, a plurality of single-mode fibers are arranged in the OPPW protection line, and the single-mode fibers arranged in the OPPW protection line are respectively connected with a distributed optical fiber vibration sensing system and a distributed optical fiber stress strain sensing system and are respectively used for monitoring vibration and stress strain along the OPPW protection line; the method comprises the steps that preset number of point type pressure sensors are sequentially connected in series at preset positions of single-mode optical fibers arranged in an OPPW (optical fiber) protection line, and the point type pressure sensors are connected to a demodulator for monitoring stress of the OPPW protection line at the preset positions;
the distributed optical fiber vibration sensing system, the distributed optical fiber stress strain sensing system and the point type pressure sensor are collected through the comprehensive intelligent gateway, the signals are transmitted to the local server, and the signals are further uploaded by the local server, so that real-time monitoring along the high-speed rail protection line is realized.
As a preferred technical scheme of the invention: the position of the point type pressure sensor is that the OPPW protection line is at a suspension point supporting wire clamp on the vertical rod, the single mode fiber arranged in the OPPW protection line is sequentially connected with 4 point type pressure sensors in series, the 4 point type pressure sensors are positioned on the same cross section in the OPPW protection line, and the positions of the 4 point type pressure sensors are opposite to each other on the cross section.
As a preferred technical scheme of the invention: setting a threshold value for vibration of a single-mode fiber built in the OPPW protection line, if the vibration of the single-mode fiber monitored by the distributed optical fiber vibration sensing system is larger than the set threshold value, sending an early warning signal, and transmitting the early warning signal and the generated position thereof to a local server.
As a preferred technical scheme of the invention: and setting a threshold value for stress strain of the single-mode fiber built in the OPPW protection line, and if the stress strain of the single-mode fiber monitored by the distributed optical fiber stress strain sensing system is larger than the set threshold value, sending an early warning signal and transmitting the early warning signal and the generated position to a local server.
The beneficial effects are that: the advantages of the present invention over the prior art include:
the invention designs a high-speed rail protection line monitoring system based on an optical fiber integrated sensing technology, which monitors signals such as vibration, stress, strain and the like of a high-speed rail protection line in real time through the optical fiber integrated sensing technology, and acquires the health state of the high-speed rail protection line in real time through effective data processing analysis, so that the real-time monitoring replaces manual inspection, the monitoring efficiency of the high-speed rail protection line is improved, the personal safety of inspection personnel is protected, and the intelligent monitoring and operation management level of an electrified railway is further improved.
Drawings
FIG. 1 is a layout view of a point-type pressure sensor provided in accordance with an embodiment of the present invention;
fig. 2 is a schematic diagram of a high-speed railway OPPW protection line monitoring system according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
The embodiment of the invention provides a high-speed rail protection line monitoring system based on an optical fiber integrated sensing technology, which comprises an OPPW protection line, a point type pressure sensor, a distributed optical fiber vibration sensing system (ODVS), a distributed optical fiber stress strain sensing system (DSS) and a demodulator;
the method comprises the steps that the OPPW protection line is used for replacing the position and the effect of the PW protection line in an application scene of the high-speed rail protection line, a plurality of single-mode fibers are arranged in the OPPW protection line, and the single-mode fibers arranged in the OPPW protection line are respectively connected with a distributed optical fiber vibration sensing system and a distributed optical fiber stress strain sensing system and are respectively used for monitoring vibration and stress strain along the OPPW protection line; the method comprises the steps that preset number of point type pressure sensors are sequentially connected in series at preset positions of single-mode optical fibers arranged in an OPPW (optical fiber) protection line, and the point type pressure sensors are connected to a demodulator for monitoring stress of the OPPW protection line at the preset positions;
the distributed optical fiber vibration sensing system is based on the Rayleigh scattering principle, adopts an optical fiber as a sensor, and obtains vibration information around any point along the optical fiber in real time, wherein related parameters are shown in the following table 1:
table 1ODVS device-related parameters
| Name of the name | Performance index |
| Maximum measurement distance | 65km |
| Spatial resolution | 2～30m |
| Positioning accuracy | ±2m |
| Frequency of vibration detectable | 10Hz～3KHz |
The distributed optical fiber stress strain sensing system is based on the stimulated Brillouin scattering effect and the optical time domain reflection technology principle. And the optical fiber is used as a sensor to obtain stress strain distribution information of each point on the optical fiber in real time, so that continuous on-line monitoring and accurate positioning of the ultra-long distance are realized. The relevant parameters are shown in the following table 2:
table 2DSS device related parameters
| Name of the name | Performance index |
| Maximum measurement distance | 130km |
| Spatial resolution | 1～25m |
| Strain measurement range | -5000με～10000με |
| Strain measurement accuracy | 20με |
| Sweep frequency range | 10～11GHz |
The preset positions of the single-mode optical fibers are sequentially connected with a preset number of point-type pressure sensors in series, and the point-type pressure sensors are connected into a demodulator for monitoring stress of the OPPW protection line at the preset positions;
the OPPW wire is easy to break at the suspension point supporting wire clamp on the vertical rod. Referring to fig. 1, the positions of the point type pressure sensors are the positions of suspension point supporting clamps of the OPPW protection line on the upright rods, in fig. 1, numerals 1, 2, 3 and 4 represent 4 point type pressure sensors, single mode fibers arranged in the OPPW protection line are sequentially connected with the 4 point type pressure sensors in series, and the 4 point type pressure sensors are positioned on the same cross section in the OPPW protection line and are opposite to each other in pairs on the cross section; the 4 point type pressure sensors are connected into a demodulator for monitoring the stress condition of the OPPW protection wire at the position of the wire clamp and judging the stress direction. The parameters associated with the point pressure sensor are shown in table 3 below:
table 3 fiber optic point pressure sensor parameters
| Name of the name | Performance index |
| Measuring range | ±1500με |
| Sensitivity of | 1.5pm/με |
| Sensor length | 30mm～40mm |
| Strain measurement accuracy | 1510～1590nm |
The method comprises the steps that signals collected by a distributed optical fiber vibration sensing system, a distributed optical fiber stress strain sensing system and a point type pressure sensor are converged through a comprehensive intelligent gateway and transmitted to a local server, and the signals are further uploaded by the local server through data processing and analysis, so that relevant signals of a protection line are displayed on an application service layer, and real-time monitoring along the high-speed rail protection line is realized; the high-speed railway OPPW protection line monitoring system architecture is shown in fig. 2, and comprises a sensing layer, a transmission layer and an application service layer, wherein the OPPW protection line, a point type pressure sensor, a distributed optical fiber vibration sensing system, a distributed optical fiber stress strain sensing system and a demodulator are arranged on the sensing layer, and an integrated intelligent gateway is used for transmitting vibration and stress strain signals of the collected OPPW protection line to a local server arranged on the transmission layer through wireless, optical fiber or electric connection, and then sequentially uploading the vibration and stress strain signals to an access network and a backbone network by the local server and finally transmitting the vibration and stress strain signals to the application service layer for display.
In one embodiment, a threshold is set for vibration of a single-mode fiber built in an OPPW protection line, and if vibration of the single-mode fiber monitored by the distributed optical fiber vibration sensing system is greater than the set threshold, an early warning signal is sent out, and the early warning signal and a position generated by the early warning signal are transmitted to a local server.
In one embodiment, a threshold is set for stress strain of a single-mode fiber built in an OPPW protection line, and if the stress strain of the single-mode fiber monitored by a distributed optical fiber stress strain sensing system is greater than the set threshold, an early warning signal is sent out, and the early warning signal and a position generated by the early warning signal are transmitted to a local server.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (4)
1. The high-speed rail protection line monitoring system based on the optical fiber integrated sensing technology is characterized by comprising an OPPW protection line, a point type pressure sensor, a distributed optical fiber vibration sensing system, a distributed optical fiber stress strain sensing system and a demodulator;
the method comprises the steps that the OPPW protection line is used for replacing the position and the effect of the PW protection line in an application scene of the high-speed rail protection line, a plurality of single-mode fibers are arranged in the OPPW protection line, and the single-mode fibers arranged in the OPPW protection line are respectively connected with a distributed optical fiber vibration sensing system and a distributed optical fiber stress strain sensing system and are respectively used for monitoring vibration and stress strain along the OPPW protection line; the method comprises the steps that preset number of point type pressure sensors are sequentially connected in series at preset positions of single-mode optical fibers arranged in an OPPW (optical fiber) protection line, and the point type pressure sensors are connected to a demodulator for monitoring stress of the OPPW protection line at the preset positions;
the distributed optical fiber vibration sensing system, the distributed optical fiber stress strain sensing system and the point type pressure sensor are collected through the comprehensive intelligent gateway, the signals are transmitted to the local server, and the signals are further uploaded by the local server, so that real-time monitoring along the high-speed rail protection line is realized.
2. The high-speed rail protection line monitoring system based on the optical fiber integrated sensing technology according to claim 1, wherein the point type pressure sensors are positioned at suspension point supporting clamps of the OPPW protection line on the vertical rods, the single-mode optical fibers arranged in the OPPW protection line are sequentially connected with 4 point type pressure sensors in series, the 4 point type pressure sensors are positioned on the same cross section in the OPPW protection line, and the positions of the point type pressure sensors on the cross section are opposite to each other.
3. The system for monitoring the high-speed rail protection line based on the comprehensive optical fiber sensing technology according to claim 1, wherein a threshold is set for vibration of a single-mode fiber built in an OPPW protection line, if vibration of the single-mode fiber monitored by the distributed optical fiber vibration sensing system is greater than the set threshold, an early warning signal is sent out, and the early warning signal and a position generated by the early warning signal are transmitted to a local server.
4. The system for monitoring the high-speed rail protection line based on the comprehensive optical fiber sensing technology according to claim 1, wherein a threshold value is set for the stress strain of the single-mode optical fiber arranged in the OPPW protection line, if the stress strain of the single-mode optical fiber monitored by the distributed optical fiber stress strain sensing system is greater than the set threshold value, an early warning signal is sent out, and the early warning signal and the generated position thereof are transmitted to a local server.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311031805.8A CN117073825A (en) | 2023-08-16 | 2023-08-16 | High-speed railway protection line monitoring system based on optical fiber comprehensive sensing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311031805.8A CN117073825A (en) | 2023-08-16 | 2023-08-16 | High-speed railway protection line monitoring system based on optical fiber comprehensive sensing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117073825A true CN117073825A (en) | 2023-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311031805.8A Pending CN117073825A (en) | 2023-08-16 | 2023-08-16 | High-speed railway protection line monitoring system based on optical fiber comprehensive sensing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117073825A (en) |
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2023
- 2023-08-16 CN CN202311031805.8A patent/CN117073825A/en active Pending
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