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Distributed optical fiber multi-parameter sensing measurement system

An optical fiber distribution, sensing and measurement technology, applied in the direction of transmitting sensing components with optical devices, can solve the problems of inability to monitor the vibration information of sensing optical fibers, meet the requirements of avoidance, reduce detection noise, and enhance the effect of applicability

Active Publication Date: 2015-06-10
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0003] In order to solve the problem that the existing distributed optical fiber sensor cannot monitor the vibration information of the sensing optical fiber, the present invention provides an optical fiber distributed multi-parameter sensing and measuring system

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Embodiment Construction

[0016] Optical fiber distributed multi-parameter sensing and measurement system, including ultra-narrow linewidth high-power fiber laser 1, first 1*2 optical coupler 2, single sideband carrier suppression modulator 3, second 1*2 optical coupler 4, The third 1*2 optical coupler 5, the electro-optical modulator 6, the first 2*1 optical coupler 7, the polarization scrambler 8, the integrated wavelength division multiplexer 9, the sensing fiber 10, the all-fiber narrow-band low-noise bridge Deep frequency shifter 11, narrowband fiber grating transmission filter 12, second 2*1 optical coupler 13, third 2*1 optical coupler 14, first low bandwidth high gain photodetector 15, second low bandwidth high Gain photodetector 16, data acquisition and processing system 17;

[0017] Wherein, the output end of the ultra-narrow linewidth high-power fiber laser 1 is connected to the input end of the first 1*2 optical coupler 2; the first output end of the first 1*2 optical coupler 2 is connected...

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Abstract

The invention relates to the distributed optical fiber sensing technique, in particular to a distributed optical fiber multi-parameter sensing measurement system. The distributed optical fiber multi-parameter sensing measurement system solves the problem that according to an existing distributed optical fiber sensor, vibration information of sensing optical fibers can not be monitored. The distributed optical fiber multi-parameter sensing measurement system comprises a super-narrow-linewidth high-power optical fiber laser, a first 1*2 optical coupler, a single-side-band carrier suppression modulator, a second 1*2 optical coupler, a third 1*2 optical coupler, an electrooptical modulator, a first 2*1 optical coupler, a scrambler, an integrated wavelength division multiplexer, sensing optical fibers, a full-optical-fiber narrow-band low-noise Brillouin frequency shift, a narrow-band fiber bragg grating transmission filter, a second 2*1 optical coupler, a third 2*1 optical coupler, a first low-bandwidth high-gain photoelectric detector, a second low-bandwidth high-gain photoelectric detector and a data acquisition processing system. The distributed optical fiber multi-parameter sensing measurement system is suitable for various measurement fields.

Description

technical field [0001] The invention relates to distributed optical fiber sensing technology, in particular to an optical fiber distributed multi-parameter sensing and measuring system. Background technique [0002] Distributed optical fiber sensing technology refers to the technology that uses optical fiber as the sensing element and transmission element at the same time, and can realize the measurement of temperature and strain at different positions along the entire length of the optical fiber. Compared with other optical fiber sensing technologies, distributed optical fiber sensing technology has incomparable advantages, and it has become one of the research hotspots at home and abroad. At present, based on distributed optical fiber sensing technology, various forms of distributed optical fiber sensors have been developed, among which the most widely used are distributed optical fiber Raman photon sensors and distributed optical fiber Brillouin photon sensors. However, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353
Inventor 张明江张永宁刘毅王云才
Owner TAIYUAN UNIV OF TECH
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