基于马赫曾德尔干涉原理的分布式光纤传感系统具有对油气管道破坏行为的预警潜力,而分布式的定位技术是其关键技术之一;基于互相关原理、对其定位理论进行了研究,构建了基于虚拟仪器平台的实验系统、并进行了试验;在总长20 km光纤的8个不同位置分别进行多次试验,初步试验结果达到了149 m的定位精度,接近了实际工程的定位需求。

The distributed optical fiber sensing system based on Mach-Zehnder interference principle has the ability of warning the potential sabotage acts to oil and gas pipelines, and the distributed location technology is one of the key technologies. Based on the correlation theory, the location theory has been studied, the experimental system based on virtual instrument platform has been established; Several experiments has been carried out at eight different locations across 20 km sensing fiber, the results show that the positioning error could be controlled within 149 m,which can meet the practical positioning needs.