摘要
低动态响应严重限制了相位敏感光时域反射计(Φ-OTDR)系统在高速公路车辆振动信号检测中的应用。理论分析了Φ-OTDR系统车辆振动探测原理。针对相干探测时信号解调所造成的低动态响应问题,提出了利用专用解调芯片进行模拟解调的解决方案,并进行压电陶瓷(PZT)振动模拟实验和高速公路实验。实验结果表明,基于ADRF6850宽带接收机芯片的模拟解调器达到了系统对精度的要求,且极大地提高了Φ-OTDR系统的动态响应能力,证明了高动态响应Φ-OTDR系统在高速公路车辆振动信息检测中有很大的应用前景。
The low dynamic response severely limits the application of phase-sensitive optical time domin reflectometer（Φ-OTDR） system in highway vehicle vibration signal detection. This paper theoretically analyses the Φ-OTDR system vehicle vibration detection principle. Aiming at the problem of low dynamic response caused by signal demodulation in coherent detection, the paper proposes a solution of analog demodulation using dedicated demodulation chip and carries out the PZT simulation experiments and highway experiments.The result shows that the analog demodulator based on the ADRF6850 wideband receiver chip achieves the system＇s accuracy requirements, greatly improves the dynamic response capability of Φ-OTDR system, and proves that the high dynamic response Φ-OTDR system has great application prospect in the detection of highway vehicle vibration information.
作者
邱玉东
秦祖军
熊显名
张文涛
QIU Yudong;QIN Zujun;XIONG Xianming;ZHANG Wentao(School of electronic engineering and automation, Guilin University of Electronic Technology, Guilin Guangxi 541004, China)
出处
《光通信技术》
北大核心
2018年第4期33-36,共4页
Optical Communication Technology
基金
国家自然科学基金(批准号:61565004)资助
关键词
相敏光纤传感
模拟解调
振动检测
动态响应
phase sensitive fiber sensing
analog demodulation
vibration detection
dynamic response
