【摘要】 介绍了相位调制型光纤传感器解调原理以及当前常用的解调方法,详细论述了基于3×3耦合器的无源零差对称解调原理及基于Labview软件开发平台的相位解调方法.实验结果显示该方法可实现对相位调制信号的准确解调.与传统硬件解调方法相比,该方法具有易于开发、便于实现微机处理等突出特点.更多还原

【Abstract】 The principle of phase modulating optic fiber sensor and some recent demodulation methods are introduced in this paper at first.Then a phase demodulation method designed by Laview and based on the passive and symmetrical demodulation principle used 3×3 coupler are discussed particularly.The result of experiments shows that this method can implement the accurate demodulation from the phase modulated signal.Compared with the traditional demodulation method using hardware,it has the remarkable characteristics as easily designed and processed by the popular microcomputer.更多还原