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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。
Distributed optical fiber sensing system based on Mach-Zehnder interference principle has the potential of early warning for the destruction of oil and gas pipelines. Distributed positioning technology is one of the key technologies. Based on the principle of cross correlation, the positioning theory is studied. The experimental system based on the virtual instrument platform was constructed and tested. Several experiments were carried out at eight different positions of 20 km fiber length respectively. The preliminary test results achieved a positioning accuracy of 149 m, close to the actual project positioning requirements.