【摘要】 波长编码信号解调是实现光纤光栅多参量、多点分布式传感网络的核心技术之一。本文总结了光纤光栅传感信号解调的一般原理和技术难点,分类评述了常用解调方法的工作机理、特点和性能。同时,提出了一种新型的、用宽带光源和可调谐光滤波器(TOF)构成的可调谐窄带光源,对测量光栅阵列和参考光栅进行波长扫描,借助光电探测器和信号处理系统实现复用传感系统的解调技术。更多还原

【Abstract】 Wavelength-encoded signal demodulation is one of the key techniques to achieve fiber grating distributed sensing network. This paper summarized the general principle and technical problems in demodulation of fiber grating sensing signal. The principle of operation, characteristics and functions of commonly used demodulating methods were described. Meanwhile, a novel demodulation technique was proposed, the sensing grating array and reference grating were scanned by a tunable narrow-band light source composing a broad-band source and a tunable optical filter. Multiplexed sensing system was then demodulated by virtue of photo-detector and signal processing system.更多还原