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Vehicle running monitoring system based on optical fibre grating

A fiber grating and vehicle operation technology, which is applied in transportation and packaging, railway car body parts, and optical devices to transmit sensing components, etc. Falling off or failure and other problems, to achieve the effect of reducing the use cost of the system, convenient installation and maintenance, and strong anti-electromagnetic interference ability

Inactive Publication Date: 2009-04-01
BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the delicate fiber grating components are directly pasted or welded on the surface of the rail structure. Although relatively accurate shape or stress changes can be measured in this way, it is difficult to disassemble. For the frequent construction of the rail system, Installation and maintenance have brought great restrictions
Moreover, since the welding method is easily affected by the strong vibration of the wheel and rail, the welding is easily broken, and the adhesive method is easily affected by aging and thermal expansion and contraction, so the sensor for direct measurement is easy to fall off or fail, and it is not suitable for long-term use.
In addition, the sensor unit used in direct measurement is difficult to disassemble, which is very unfavorable for the maintenance of the rail system, and it is difficult to migrate the sensor according to the specific needs of the measurement, so it is difficult to realize temporary measurement economically

Method used

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  • Vehicle running monitoring system based on optical fibre grating
  • Vehicle running monitoring system based on optical fibre grating
  • Vehicle running monitoring system based on optical fibre grating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1: Track occupancy monitoring based on vehicle operation monitoring system

[0054] Track occupancy monitoring is a very important business in the field of railway signaling, which requires extremely high safety and reliability. For this kind of business application, the inventor thinks that for the security protection of the outdoor part, the optical ring protection and optical path redundancy can be used simultaneously or separately. The composition of the measurement interval requires at least two axle counting measurement points. For the specific arrangement of sensors in the measurement points and the axle counting calculation method, please refer to the "vehicle axle counting method based on rail deformation / stress parameters" filed by the inventor. The composition of the indoor subsystem is as follows: figure 1 As shown, among them, the sensing signal demodulation module 2 and the business computing components of the business computing module should a...

Embodiment 2

[0055] Embodiment 2: Realize hump length measurement based on vehicle operation monitoring system

[0056] In the hump grouping control signal, the free length data of the grouping line is very important for the safety of automatic and semi-automatic grouping operations. Traditional length measurement technology is based on traditional techniques such as track circuit impedance variation or radar length measurement. Utilizing the axle counting method provided in the "vehicle axle counting method based on rail deformation / stress parameters" filed by the inventor in another application, the hump length measurement using the fiber grating sensor can be realized.

[0057] The axle counting point arrangement for hump length measurement is very similar to Image 6 or Figure 7 In the way shown, the measuring points here are the axle counting measuring points; the adjacent railway line is the marshalling line; the interval between two axle counting measuring points on the same mars...

Embodiment 3

[0059] Embodiment 3: Realize train speed measurement based on vehicle operation monitoring system

[0060] In this embodiment, the composition of the indoor subsystem adopts figure 1In the structure shown, the interface of the business interface module 4 can be determined according to the needs of the business organization. The layout and specific calculation method of the outdoor subsystem can refer to the "Vehicle Speed ​​Measurement Method Based on Rail Deformation / Stress Parameters" filed by the inventor. To put it simply, when using a single measurement point for speed measurement, firstly arrange the deformation / stress sensor on the measurement point, measure the time interval for each wheel set of the train passing through the measurement point, and obtain the distance between each wheel set by comparing the car model and the bogie model. The length interval between them, divide the corresponding length interval by the time interval to get the speed of the train passin...

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Abstract

The invention discloses a vehicle running monitoring system based on a fiber grating, which consists of an indoor sub-system and an outdoor sub-system. The indoor sub-system comprises an optical module, a sensing signal demodulating module, a business calculating module and a business interface module. The four modules are connected with each other in sequence; the outdoor sub-system comprises a transmission cable, sensor units and a roadside maintaining device; the sensor units are arranged on a steel rail and are connected with the roadside maintaining device; the transmission cable is connected with all the sensor units; the optical module in the indoor sub-system is connected with the transmission cable led into indoor by the outdoor sub-system. The vehicle running monitoring system based on the fiber grating can dynamically monitor the vehicle running parameters like the running state of a wheel rail, the occupied space of the rail, the running speed, the weight, and the like. Besides, the vehicle running monitoring system of the invention has the advantages of high safety, low energy consumption as well as convenient and fast mounting and maintenance.

Description

technical field [0001] The present invention relates to a rail transit-oriented vehicle operation monitoring system, in particular to a vehicle operation monitoring system based on a fiber grating sensor that can dynamically monitor vehicle operation parameters such as wheel-rail operation status, track section occupancy, operation speed, and weight The system belongs to the technical field of rail transit safety monitoring. Background technique [0002] In the rail transit system, in order to ensure the safety of vehicles and improve the efficiency of railway operations, it is necessary to know the operating parameters of the wheels and rails, the occupancy of the track section, the position of the train, the speed, the acceleration, and the weight of the vehicle in real time. In response to this actual demand, the railway department has successively researched a variety of vehicle operating parameter monitoring technologies, such as track circuits and copper cables for mon...

Claims

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Application Information

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IPC IPC(8): B61L21/06B61L25/02G01D5/353
Inventor 袁军国吕志东辛斌李明华
Owner BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
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