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Tunable light source based on fiber grating temperature monitoring system applications in power line

Author: WanXianJie
Tutor: YiBo
School: University of Science and Technology of China
Course: Microelectronics and Solid State Electronics
Keywords: Tunable lasers Fiber Bragg Grating High Siqie toe Photodiode Data collection
CLC: TN253
Type: Master's thesis
Year: 2011
Downloads: 54
Quote: 0
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Abstract


Distribution of key components ( such as cable connectors, etc. ) is caused by overheating of the main fire grid . High-voltage substations in the center , on the main transformer substation , segmented knife , capacitors and other aspects of the real-time temperature monitoring can greatly improve the security of power grid operation . Overheating of the grid is usually more 6KV high voltage grid , the conventional temperature sensor can not work at high voltages . FBG temperature sensor compared with conventional sensors have many advantages, such as high sensitivity , small size , corrosion resistance, anti-electromagnetic radiation , the optical path can be bent , easy to implement quasi- distributed sensing , it is suitable used in high-voltage grid temperature monitoring. This paper investigates the fiber photosensitivity , fiber grating writing method , fiber Bragg grating waveguide structure , obtained by the coupled mode theory the reflective properties of fiber gratings , FBG strain and temperature sensitivity, longevity and reliability resistance and fiber grating demodulation method and network multiplexing . On this basis , the grid can be used to design a quasi- distributed fiber grating temperature monitoring system. The system uses high Siqie toe fiber Bragg grating for temperature sensors, this sensor is a good reflection characteristics combined with data acquisition card usage , tunable laser detected after injection of fiber laser power returned by the grating maxima , this Bristol -based scattering similar to the \The 16 100m in length singlemode fiber channel installation 48 Siqie toe high fiber Bragg grating monitoring points, for each monitoring point for temperature monitoring in real time , at room temperature, the monitoring of each point accuracy ± 2 ℃. Theoretically , monitoring temperature range of 250 ℃.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Optical waveguide and integrated optics > Fiber optic components
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