Lei Feng, Jun He, Jing-yuan Duan, Fang Li, Yuliang Liu
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引用次数: 11
Abstract
This paper presents the fundamental technique of PGC (phase generated carrier) and its realization on Compact RIO (Compact Reconfigurable Input and Output) which adopts real-time and FPGA (Field Programmable Grate Array) techniques. Improvement of the PGC technique is also introduced by using peak-to-peak value detection method to reduce the influence of variation of the light intensity. A four-element FBG (Fibre Bragg Gratings) Laser Sensor system is conducted in the experiment and the demodulated results demonstrate correlation coefficient as high as 0.995 with the reference signal and the dynamic range to be 120 dB @ 63 Hz.
本文介绍了相位生成载波的基本技术及其在Compact RIO (Compact Reconfigurable Input and Output)上的实现，该系统采用实时和现场可编程栅阵列(FPGA)技术。本文还介绍了对PGC技术的改进，采用峰对峰检测的方法来减少光强变化的影响。实验建立了四元光纤光栅激光传感器系统，解调结果表明，该系统与参考信号的相关系数高达0.995，动态范围为120 dB @ 63 Hz。
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