Ф-OTDR振动检测系统设计与FPGA实现

Design and Implementation of Ф-OTDR Vibration Detection System Based on FPGA

针对Ф-OTDR振动检测系统数据庞大、处理缓慢的问题,通过对硬件采集电路的设计和上位机控制软件的编写,运用FPGA高速采集技术对搭建的Ф-OTDR分布式光纤传感系统进行了优化,显著提升了系统的响应速度,从而可实现10 km光纤上振动信号的有效检测与定位,且定位误差为20 m。因此,基于FPGA技术的信号高速采集系统有助于Ф-OTDR在振动测量领域的推广和应用。

To solve the problem of large data and slow processing of the phase sensitive optical time domain reflectometry（ Φ-OTDR） vibration detection system,field programmable gate array（ FPGA） technology was optimized for Φ-OTDR distributed optical fiber sensing system,then the hardware circuit and PC control software were designed. The results demonstrate the response speed of the system is much improved.The experimental results demonstrate that the method can effectively detect and locate the vibration signal on the 10 km optical fiber,and the positioning error is 20 m.Thus,high speed data acquisition system using FPGA will promote Φ-OTDR applies to the field of vibration measure.