An optical fiber measurement system for bending degree of scraper machine

An optical fiber measurement and bending technology, which is applied to measurement devices, optical devices, instruments, etc., can solve the problems of unreasonable laying method of distributed optical fiber sensing system, inaccurate measurement results, nonlinear problems, etc., to achieve enhanced application performance and operability, increase the frequency sweep range, and reduce the effect of loss

Active Publication Date: 2021-05-07
TAIYUAN UNIV OF TECH
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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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  • An optical fiber measurement system for bending degree of scraper machine
  • An optical fiber measurement system for bending degree of scraper machine
  • An optical fiber measurement system for bending degree of scraper machine

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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 an optical fiber measurement system for the curvature of a scraper machine, belonging to the technical field of distributed optical fiber sensing. The existing scraper machine bending degree measurement method cannot accurately detect the bending angle of the scraper machine in real time, which is not conducive to timely adjustment of the travel direction of the scraper machine. The invention combines the IQ cycle modulation method, the double interference loop and the polarization diversity receiving technology to accurately measure the curvature of the scraper machine. At the same time, the invention provides a specific optical fiber laying method, realizes real-time monitoring of the curvature of the scraper machine, avoids unnecessary losses caused by the deviation of the coal shearer from the track, and has the advantages of accurate measurement, high reliability, and good real-time performance.

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 Patents(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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