摘要
设计了一种以FPGA作为数据处理核心,基于相位敏感光时域反射计(Φ-OTDR)的光纤分布式扰动传感器信号检测系统。该系统具有数据采集、处理、存储、通信以及液晶显示功能。扰动信号检测算法采用多周期等距累加相减法。通过阈值判定实现扰动信号的判别,并可以同时显示传感光纤长度范围内不同位置的扰动。实验证明,该系统内部数字处理部分可以实现信号检测算法以及扰动阈值判定功能。
A signal detecting system is designed for the distributed optical fiber disturbance sensor based on phase-sensitive optical time-domain reflectometer （Ф-OTDR）. It uses FPGA for its data processing core. Main functions of the system include data acquisition, data processing, storage, communication and display. The disturbance sensing signal is obtained from several periods of accumulating and subtracting, and recognized by threshold estimating. The system also can display disturbances along the sensing fber simultaneously. The functional experiment proves that the above-mentioned algorithm and threshold estimating function can be actualized in the system.
出处
《电子技术应用》
北大核心
2012年第11期28-30,共3页
Application of Electronic Technique
关键词
FPGA
扰动信号检测
分布式光纤传感
相位敏感光时域反射计
FPGA
vibration signal detecting
distributed optical fiber sensing
phase-sensitive optical time-domain rcflectomcter
