Mr. Jianguo Xu Profile

Jianguo Xu

at Xi'an Research Institute of High Technology

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Proceedings Article | 12 October 2010 Paper

Application of fiber Bragg grating sensing technology in long-distance detection of temperature in weapon depots

Jianguo Xu, ZhiLi Zhang, Bing Zhao, Zhulin Fu

Proceedings Volume 7656, 76563Z (2010) https://doi.org/10.1117/12.866236

KEYWORDS: Fiber Bragg gratings, Sensors, Sensing systems, Weapons, Temperature metrology, Digital signal processing, Temperature sensors, Demodulation, Optical design, Signal detection

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Incessantly long-term real-time detection of temperature is demanded in weapon depots, where the weapon equipment is stored in, to realize the self-regulation of temperature. Long-Distance intellectualized control can be actualized by setting sensor-net which is composed by several temperature sensors to simultaneously detect multi-point and multi- parameter. The temperature sensors based on Fiber Bragg Grating Technology are more suitable for long-term detection for their preponderance in high sensitivity, small volume, anti-jamming and so on. The temperature sensing system, which is composed by several Fiber Bragg Grating sensors in one light-cable, can accomplish Quasi-Distributed measurement and is suitable for multi-point and multi- parameter detection. Basal principle of Fiber Bragg Grating sensing technology is expounded in the article, with a sensing system applied to the long-distance detection of temperature in the depots is designed based on F-P Scanning Method. Besides, DSP and FPGA are adopted pre-treat the transformed data from AD such as filter and determine threshold. The main modules of this demodulation system such as 1550nm exact photoelectric detection module and trigonal wave voltage scan module are designed in this paper to realize demodulation. Proved by the analysis of the testing data, the Fiber Bragg Grating temperature sensing system, whose testing precision achieved the design purpose, has advantages of real-time measure and long-term stability. The system, which provides guarantee to realize the auto-control of temperature, can be generalized and will provide favorable foundation for the broad using of Fiber Bragg Grating sensing technology in the army.

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