Multifunctional distributed optical fiber sensing device

A kind of technology of distributed optical fiber and sensing device

Active Publication Date: 2017-12-01
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the optical signal processing goes to and from the adjustable light information processing system, and the realization of the control is relatively complicated

Method used

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  • Multifunctional distributed optical fiber sensing device
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  • Multifunctional distributed optical fiber sensing device

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] The invention provides a multifunctional distributed optical fiber sensing device, the specific structure is as follows figure 1 As shown, it includes a laser 1, a first fiber coupler 201, a second fiber coupler 202, a third fiber coupler 211, a fourth fiber coupler 212, an acousto-optic modulator 3, a fiber circulator 4, an optical interface 5, The first photodetector 601, the second photodetector 602, the first bandpass filter 701, the second bandpass filter 702, the third bandpass filter 711, the fourth bandpass filter 712, the first low noise Amplifier 801, second low-noise amplifier 802, optical switch 9, frequency synthesizer 10, mixer 11, low-pass filter 12, dual-channel data acquisition and processing module 13 and computer 14; above-mentioned second optical fiber coupler 202 Use a Y-type 3dB coupler, the third fiber coupler 211 and the fourth...

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Abstract

The invention provides a multifunctional distributed optical fiber sensing device, which comprises a laser, a first optical fiber coupler, a second optical fiber coupler, a third optical fiber coupler, a fourth optical fiber coupler, an acousto-optic modulator, an optical fiber circulator, an optical interface, a first photoelectric detector, a second photoelectric detector, a first bandpass filter, a second bandpass filter, a third bandpass filters, a fourth bandpass filter, a first low noise amplifier, a second low noise amplifier, an optical switch, a frequency synthesizer, a mixer, a low pass filter, a dual-channel data acquisition and processing module and a computer. Direct switching control on sensing optical signals and the dual-channel data acquisition and processing module are adopted to process Rayleigh scattering signals and Brillouin scattering signals, multifunctional monitoring and display on attenuation, vibration, temperature and strain information of a measured optical fiber can be realized, the signal extraction and processing efficiency is high, the practicability is better, and commercial development of the device is facilitated.

Description

technical field [0001] The invention relates to the technical field of optical sensing, in particular to a multifunctional distributed optical fiber sensing device. Background technique [0002] Since optical fiber can also be used as a communication and sensing medium, its passive, anti-electromagnetic interference, corrosion resistance, high temperature resistance and other characteristics determine its great potential in the development of global energy Internet. Mature optical fiber sensing technology and equipment have been applied in the electric power industry, such as Raman optical time domain reflectometer for transformer temperature monitoring, Brillouin optical time domain reflectometer for submarine cable temperature / stress monitoring, Brillouin optical time domain reflectometer for submarine cable temperature / stress monitoring, Yuanguang time-domain analyzer is used for icing monitoring of transmission lines, application of fiber grating in switchgear temperatur...

Claims

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Application Information

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IPC IPC(8): G01D5/36G01K11/32G01L1/24G01K11/322
CPCG01D5/36G01K11/32G01L1/246G01K11/322
Inventor 吕立冬孙晓艳陶静姚继明李炳林钟成崔力民郭经红
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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