摘要
PGC(相位生成载波)的零差解调技术常用于干涉型光纤传感器的信号解调,然而由于模拟电路的电子元件之间存在阻抗不匹配、过载和温度漂移等问题,因此解调系统不能达到最佳性能.该文介绍了基于虚拟仪器技术的光纤加速度计系统.与传统的硬件设计相比,此方法能够克服模拟电路引入的噪声和元器件之间不匹配问题.在虚拟仪器环境下实现信号的采集、显示以及数据处理和相位调制,更具有可行性.
The PGC homodyne demodulation technology is used frequently to demodulate signals from interferomctric optical fiber sensor. However, it is difficult for the system to achieve the optimal performance because the electronic components constituting the analog circuit possess some disadvantages such as overload, improper resistance, etc. An optical fiber accelerometer system based on virtual instrument technology was described. Compared with the traditional hardware design, the proposed method can eliminate the noise from analog circuit and mismatching between components. Since the signal acquisition and display, data processing and phase modulation are all realized in a virtual instrument environment, this scheme has more practical feasibility.
出处
《应用科技》
CAS
2007年第11期25-27,50,共4页
Applied Science and Technology
关键词
光纤传感器
相位调制
数据采集
虚拟仪器
optical fiber sensor
phase modulation
data acquisition
virtual instrument
