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Scraper machine curvature optical fiber measuring system

A technology for optical fiber measurement and bending, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve problems such as unreasonable laying methods of distributed optical fiber sensing systems, inaccurate measurement results, nonlinear problems, etc., and achieve enhanced application performance and operability, improve the scanning range, and reduce the effect of loss

Active Publication Date: 2020-12-04
TAIYUAN UNIV OF TECH
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AI Technical Summary

Problems solved by technology

Most of the traditional optical frequency domain reflectometry technology uses a single interference loop with internal modulation. This method is easy to introduce nonlinear problems, and the signal-to-noise ratio is poor, resulting in inaccurate measurement results and high cost.
In practical applications, there are problems of unreasonable and unclear laying methods in distributed optical fiber sensing systems

Method used

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  • Scraper machine curvature optical fiber measuring system
  • Scraper machine curvature optical fiber measuring system
  • Scraper machine curvature optical fiber measuring system

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Embodiment Construction

[0014] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0015] refer to figure 1 , the present invention provides a fiber optic measurement system for the curvature of a scraper machine, including: a frequency-stabilized laser 1, a first fiber coupler 3, an IQ modulator 4, an electric bridge 5, a microwave source 6, a signal generator 7, a second Fiber coupler 11, third fiber coupler 12, delay fiber 13, fourth fiber coupler 14, first photodetector 15, fifth fiber coupler 16, adjustable optical attenuator 17, first polarization beam splitter 19. The sixth optical fiber coupler 20, the second photodetector 21, the optical circulator 22, the second polarization beam splitter 23, the seventh optical fiber coupler 24, the third photodetector 25, the computer 26, the optical switc...

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Abstract

The invention relates to a scraper machine curvature optical fiber measuring system, and belongs to the technical field of distributed optical fiber sensing. The scraper machine curvature optical fiber measuring system aims at solving the problems that an existing scraper machine curvature measuring method cannot accurately detect the bending angle of a scraper machine in real time, and the advancing direction of the scraper machine cannot be adjusted in time. According to the scraper machine curvature optical fiber measuring system, an IQ cyclic modulation method, a double-interference loop and a polarization diversity reception technology are combined to accurately measure the curvature of the scraper. Meanwhile, a specific optical fiber laying mode is provided, real-time monitoring of the curvature of the scraper is achieved, unnecessary losses caused by the fact that a coal mining machine deviates from the track are avoided, and the scraper machine curvature optical fiber measuringsystem has the beneficial effects of being accurate in measurement, high in reliability, good in real-time performance and the like.

Description

technical field [0001] The invention relates to the technical field of distributed optical fiber sensing, and more specifically relates to an optical fiber measurement system for bending degree of scraper machine. Background technique [0002] Coal is an important source of energy in our country, and coal mining is particularly important. The main tool for mining is the coal shearer. The coal shearer uses the scraper machine as the running track, and travels repeatedly along the coal wall. At the same time, the coal on the coal wall is cut off, and the falling coal is loaded into the scraper machine and transported outward. Therefore, the running trajectory of the scraper determines whether the shearer can normally cut the coal wall, so a scraper bending measurement system is urgently needed. Most of the existing scraper machine bending measurement systems are cumbersome and complicated, and the measurement errors are large, and real-time measurement cannot be carried out. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 靳宝全延敏白清梁昌硕高妍张红娟王宇刘昕
Owner TAIYUAN UNIV OF TECH
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