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A method and system for testing temperature force and additional force of seamless track rail

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

Active Publication Date: 2020-06-16
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A method and system for testing temperature force and additional force of seamless track rail
  • A method and system for testing temperature force and additional force of seamless track rail
  • A method and system for testing temperature force and additional force of seamless track rail

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Effect test

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] like 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 of r...

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Abstract

The invention relates to a method and system for testing the temperature force and additional force of a seamless circuit steel rail, comprising: arranging a sensing component on an optical fiber arranged on a seamless circuit steel rail, which comprises: a first resonant cavity and a second resonant cavity Resonant cavity, the symmetry axis of the first resonant cavity is parallel to the cavity length direction of the second resonant cavity; two sets of reflected light signals output by the optical fiber at different times are obtained; from the two sets of reflected light signals, the corresponding The optical signal in the free spectral region is used to calculate the cavity length change rate of the first resonant cavity and the second resonant cavity in each sensing component; according to the cavity length change rate of the two resonant cavities, calculate the longitudinal direction of the location of the sensing component. Force and Additional Force, based on the longitudinal force and the additional force, calculate the temperature force at the location. The invention can improve the accuracy of the longitudinal force test of the seamless track rail, simplify the manufacturing process and arrangement method of the sensing component, and realize the separation of the additional force and the temperature force.

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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Patent Type & Authority Patents(China)
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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