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A Distributed Optical Fiber Sensor

A distributed optical fiber and sensor technology, applied in the direction of converting sensor output, using optical devices to transmit sensing components, instruments, etc., to achieve the effect of improving measurement accuracy

Active Publication Date: 2021-04-16
STATE GRID HEBEI ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the detection of transformer winding temperature and strain based on distributed optical fiber sensing technology.

Method used

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  • A Distributed Optical Fiber Sensor
  • A Distributed Optical Fiber Sensor
  • A Distributed Optical Fiber Sensor

Examples

Experimental program
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Effect test

Embodiment Construction

[0058] The standard parts used in the present invention can be purchased from the market, and the special-shaped parts can be customized according to the instructions and the accompanying drawings. The specific connection methods of each part adopt mature bolts, rivets, welding in the prior art , pasting and other conventional means, no longer described in detail here.

[0059] refer to Figure 1-2 , a specific embodiment of the present invention includes, including a light source module 1, the light source module 1 is composed of a tunable laser 11, an acousto-optic modulator 12 and a radio frequency modulator 13, the output terminal of the tunable laser 11 is connected to the The input end 1201 of the acousto-optic modulator 12, the output end 1301 of the radio frequency modulator 13 is connected to the modulation end 1202 of the acousto-optic modulator 12;

[0060] More than one fiber ring down cavity, the fiber ring down cavity is made up of a fiber ring 3 and a fiber gra...

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PUM

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Abstract

The invention discloses a distributed optical fiber sensor, comprising a light source module, the light source module is composed of a tunable laser, an acousto-optic modulator and a radio frequency modulator; ring and a fiber grating sensing unit, the fiber ring at least includes a fiber coupler connected by an optical fiber, an erbium-doped fiber amplifier and a fiber circulator; the connector connects the output end of the acousto-optic modulator to the The first port of the fiber coupler is connected; the third port of the fiber coupler is connected to the input end of the photodetector, and the output end of the photodetector is connected to the signal processing and display system through a high-speed data acquisition card. The synchronous triggering port of the high-speed data acquisition card is connected with the second output port of the radio frequency modulator; the connecting part includes a single-mode optical fiber and a multi-mode optical fiber. The invention can improve the deficiencies of the prior art, and improves the detection accuracy of temperature and strain.

Description

technical field [0001] The invention relates to the technical field of electric equipment detection, in particular to a distributed optical fiber sensor. Background technique [0002] The power transformer plays an important role in the power system, and its safe operation directly affects the reliability and safety of power supply. Statistics show that insulation damage is the main cause of transformer failure, and winding is the part with the highest failure rate. The accuracy and real-time performance of winding temperature and deformation detection are of great significance to the safe operation of transformers. [0003] At present, the temperature detection methods of transformers include top oil temperature method, fluorescent optical fiber temperature measurement method and fiber Bragg grating temperature measurement method. The measurement accuracy of the top oil temperature method is low, and the measurement range is small; the temperature measurement accuracy of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/353
CPCG01D5/35316G01D5/35374G01D5/3538
Inventor 高树国刘云鹏范晓舟孙路孟令明贺鹏姜硕刘博闻
Owner STATE GRID HEBEI ELECTRIC POWER RES INST
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