基于DSP的分布式光纤光栅传感解调技术的研究

李新海; 李冰

光电技术应用, 2013, 28 (1): 32, 网络出版: 2013-02-28

基于DSP的分布式光纤光栅传感解调技术的研究

Research on Sensing Demodulation Technology of Distribution Fiber Grating Based on DSP

论文大纲

李新海 ¹李冰 ²

作者单位

¹ 北京交通大学电子信息工程学院，北京 100044

² 潍坊港华燃气有限公司，山东潍坊 264001

摘要

基于F-P腔的可调谐滤波法，是一种实用性较好、发展较为成熟的分布式光纤光栅传感解调方案。波峰检测技术是这种方案的关键所在。重点研究了频谱相关法实现波峰检测的原理，对分布式光纤光栅传感系统传感信号间的波形串扰进行了分析，基于TMS320C6416定点DSP实现了相应的频率相关算法，在计算精度和运算速度两方面都得到了较理想的结果。对于分布式光纤光栅传感解调技术的研究具有一定的理论指导意义和参考价值。

Abstract

Tunable filtering method based on F-P cavity is a distribution fiber grating sensing demodulation method with good practicability and mature development. Peak detecting technology is the key to this method. Spectrum correlation method is emphasized to realize the principle of peak detecting. Waveform interference among sensing signals of distribution fiber grating sensing system is analyzed. Based on TMS320C6416 fixed point digital signal processing (DSP) chip, a correlation algorithm of relative frequency is realized and the algorithm has an ideal result in both calculation precision and operation speed. Research on the technology has certain theoretical guidance meaning and reference value.

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李新海, 李冰. 基于DSP的分布式光纤光栅传感解调技术的研究[J]. 光电技术应用, 2013, 28(1): 32. LI Xin-hai, LI Bing. Research on Sensing Demodulation Technology of Distribution Fiber Grating Based on DSP[J]. Electro-Optic Technology Application, 2013, 28(1): 32.

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