φ-OTDR相位提取程序的设计

Design ofφ-OTDR Phase Extraction Program

阐述相位敏感型光时域反射仪(φ-OTDR)利用光纤实现沿线振动的分布式测量,φ-OTDR通过光相位变化反映光纤沿线的振动状态,相位提取是φ-OTDR技术的关键。针对相位提取过程中的数字正交解调、振动定位和相位解卷绕的主要步骤,介绍程序设计的实现方法,并给出流程图。通过对数据的处理,验证实现方法的有效性。

This paper describes a phase sensitive optical time-domain reflectometer(φ-OTDR utilizes optical fibers to achieve distributed measurement of vibrations along the route,φ-OTDR reflects the vibration state along the fiber optic line through optical phase changes,and phase extraction isφ-The key to OTDR technology.It introduces the implementation method of program design and provides a flowchart for the main steps of digital orthogonal demodulation,vibration positioning,and phase unwrapping in the phase extraction process.Verify the effectiveness of the implementation method through data processing.