全光纤干涉振动信号测试系统的硬件解调系统的研究  

Research of Signal Hardware Demodulating Technique in Fiber Interferometer Vibration Measurement

作　　者：吕舜[1] 娄莉凤[1] 王超[1] 

机构地区：[1]复旦大学材料科学系,上海200433

出　　处：《传感技术学报》2013年第7期932-935,共4页Chinese Journal of Sensors and Actuators

基　　金：上海市科委科研计划项目(10251211500);科技支撑计划项目(2013BAK02B03)

摘　　要：介绍了一种应用于全光纤干涉振动传感系统的硬件信号相位解调系统。文中对全光纤干涉振动传感系统的信号解调原理进行了介绍和分析,对光电转换和放大过程中所造成的信号被消除直流分量进行了自动计算和补偿;设计并实现了解调光纤传感信号的硬件系统,经过测试硬件信号相位还原系统可以准确有效地还原出设计带宽内的信号,有效地消除了软件还原方法中由于引入量化噪声等导致对信号还原精度的影响。A hardware-based phase demodulation system applied in all fiber interferometer vibration sensing system is proposed. The demodulation principle of the all fiber interferometer vibration sensing system is introduced and analyzed ; the direct current component eliminated from the signal due to the process of photo-electric conversion and signal amplification is automatically calculated and compensated. This hardware-based system could demodulate the signals within the bandwidth accurately and effectively, thus eliminating the quantization noise cause by software-base demodulation.

关 键 词：光纤传感 信号处理 硬件解调 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]