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提出了一种以光纤分布式扰动传感器为核心,通过随油气管线一同敷设的标准通信光缆为传感介质的新型光纤管线预警系统.该系统利用激光干涉的原理对扰动信号进行实时探测,从而实现对挖掘、偷盗和第三方破坏等事件导致的扰动的实时监测和定位,从而达到管线安全预警的功能.该预警系统成功研制后分别在津唐输油处石油管线和杭州至嘉兴天然气管线进行了多次外场测试,该系统能在长达60 km的管线上实现250 m的定位精度,具有很好的定位稳定性.其测试结果表明:与传统油气管线监测手段相比,该系统具有无需外场供电、本质安全、灵敏度高,监测距离长、可定位以及可预警监测等技术优势,是未来油气管线监测的发展趋势.
A new type of optical fiber pipeline warning system based on optical fiber distributed disturbance sensor is proposed, which is based on the standard communication optical fiber cable laid along with the oil and gas pipelines. This system uses the principle of laser interference to detect the disturbance signal in real time, The real-time monitoring and positioning of disturbances caused by excavation, theft and third-party damage, etc., so as to achieve the function of early warning of pipeline safety.After the successful development of the early warning system, the oil pipeline in Tianjin Jin Tang Oil Pipeline and the natural gas pipeline from Hangzhou to Jiaxing With many field tests, the system can achieve a positioning accuracy of 250 m on a pipeline up to 60 km with good positioning stability.The test results show that compared with the traditional oil and gas pipeline monitoring system, the system has the advantages of no external field Power supply, intrinsically safe, high sensitivity, long monitoring distance, can be positioned and can be forewarning monitoring and other technical advantages, is the future development trend of oil and gas pipeline monitoring.