Continuous welded rail temperature force and additional force testing method and system

A technology of a seamless track rail and a test method, applied in the field of rail transit, can solve the problems of increasing the difficulty of fiber grating layout, reducing the success rate of the separation test of the basic temperature force and the additional force, and inaccurate longitudinal force, so as to improve the test efficiency. , The effect of simplifying the structure and manufacturing process and reducing the test error

Active Publication Date: 2019-01-04
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the positive correlation between the test error of the longitudinal force and the temperature rise, the test of the longitudinal force based on the temperature strain will be inaccurate. In addition, a fiber grating with different functions needs to be arranged at a test position on the track, which improves the performance of the fiber grating. The difficulty of layout reduces the success rate of separate tests for basic temperature force and additional force, and it is difficult to efficiently perform distributed tests for longitudinal forces at different test positions on the track

Method used

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  • Continuous welded rail temperature force and additional force testing method and system
  • Continuous welded rail temperature force and additional force testing method and system
  • Continuous welded rail temperature force and additional force testing method and system

Examples

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Embodiment 1

[0068] In this embodiment, a test method 100 for the temperature force and additional force of a seamless track rail includes:

[0069] Step 110: Set a plurality of sensing components in series on the optical fiber arranged on the seamless line rail, each sensing component includes: a first resonant cavity and a second resonant cavity, and the symmetry axis of the first resonant cavity and the The cavity length direction of the second resonant cavity is parallel.

[0070] Step 120, acquiring two groups of reflected optical signals output by the optical fiber at different times.

[0071] Step 130, extracting the first free spectrum light signal corresponding to each sensing component from a set of reflected light signals, and extracting the second free spectrum light signal corresponding to each sensing component from another set of reflected light signals .

[0072] Step 140: According to the optical signal in the first free spectrum region and the optical signal in the seco...

Embodiment 2

[0151] Such as Figure 7 As shown, a test system for the temperature force and additional force of a seamless line rail includes: an optical coupler, a spectrometer, a processor, and an optical fiber arranged on a seamless line rail, and the optical fiber is provided with the multiple series connected in series. a sensing assembly, each sensing assembly includes: a first resonant cavity and a second resonant cavity, the axis of symmetry of the first resonant cavity is parallel to the cavity length direction of the second resonant cavity;

[0152] The optical coupler is used to obtain two sets of reflected optical signals output by the optical fiber at different times and transmit them to the spectrometer;

[0153] The spectrometer is used to extract the first free spectral region light signal corresponding to each sensing component from a set of reflected light signals, and extract the second free spectral region light corresponding to each sensing component from another set o...

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Abstract

The invention relates to a continuous welded rail temperature force and additional force testing method and system. The method comprises steps: sensing assemblies are arranged on an optical fiber arranged on the continuous welded rail, wherein each sensing assembly comprises a first resonant cavity and a second resonant cavity, and the symmetrical axis of the first resonant cavity is parallel withthe cavity length direction of the second resonant cavity; two groups of reflected optical signals outputted by the optical fiber at different moments are acquired; free spectral region optical signals corresponding to each sensing assembly are extracted from the two groups of reflected optical signals respectively, and the cavity length change rates of the first resonant cavity and the second resonant cavity in each sensing assembly are calculated; and according to the cavity length change rates of the resonant cavities, the longitudinal force and the additional force at the position of thesensing assembly are calculated, and according to the longitudinal force and the additional force, the temperature force at the position is calculated. The continuous welded rail longitudinal force testing accuracy can be improved, the making process and the layout mode of the sensing assemblies can be simplified, and separation of the additional force and the temperature force is realized.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a method and system for testing temperature force and additional force of seamless track rails. Background technique [0002] In order to ensure the safety of the seamless line rail and the bridge where it is located, it is often necessary to test the longitudinal force of the rail in the longitudinal direction, which includes the basic temperature force under the action of temperature and the interaction between the rail and the bridge. Additional force, for example: the additional expansion and contraction force generated by the interaction of beams and rails caused by the expansion and contraction of bridges. At present, the longitudinal force is mainly obtained by testing the basic temperature force and additional force. One way to test the basic temperature force and additional force is to test the additional strain in the longitudinal direction of the track through a p...

Claims

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Application Information

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IPC IPC(8): G01L1/24
CPCG01L1/242
Inventor 谢铠泽李峰赵维刚王建西张广远张骞张浩徐飞许红彬
Owner SHIJIAZHUANG TIEDAO UNIV
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