At present, my country's monitoring of infrastructure such as oil and gas pipelines, power grids, and water conservancy networks is mainly based on some production parameters of the facilities themselves (such as sudden pressure drops, abnormal changes in oil tank liquid levels in intermediate stations), manual inspections, and reports from passers-by. These methods have low technical content and generally have shortcomings such as low efficiency, poor real-time performance, long response time, and poor anti-interference ability. Alarm can often be reported only after monitoring facilities are damaged, and practicality is restricted by both natural and man-made factors. This kind of post-event testing technology that is "mending after the sheep is lost" can only reduce but cannot avoid losses. For monitoring long-distance lines, especially due to the influence of electromagnetic interference, it is impossible to implement sensing and monitoring by relying on electricity. Therefore, optical fiber sensing technology will become the main technical means for safety monitoring and preventing man-made damage in industries such as power, water conservancy and oil and gas pipelines.
This achievement has developed an intelligent monitoring system with all-optical fiber sensing technology as the core, using optical fiber to carry out all-round real-time intelligent monitoring of the operating conditions of power grids, oil and gas pipelines, and water conservancy projects; The intelligent monitoring system can use existing communication optical cables or a variety of composite cables to locate multi-point intrusion events on the line and form a map of various typical vibration events. It uses a background state monitoring expert diagnosis system to automatically analyze various states of the operating line. Identification and judgment to ensure the safe and efficient operation of the monitored line.
The main research contents of the project are as follows: research on backscattered spectra and its interference effects; research on the correlation between the linewidth of narrow linewidth light sources and backscattered spectra interference effects; research on the correlation between optical pulse parameters and backscattered spectra interference effects; Research on the integration of positioning optical fiber vibration sensing technology, anti-area optical fiber vibration sensing technology and optical fiber temperature sensing technology and application technology in power, oilfield pipelines and other fields
According to domestic and foreign novelty search reports, the achievement level of this project has reached the international advanced level. The main innovation points are as follows:
1) Realizing the latest theoretical achievement of optical fiber sensing, Φ-OTDR technology, and integrating it in a highly integrated system;
2) Innovative single-core fiber vibration monitoring technology, and application of ultra-narrow linewidth laser and EDFA technology, effectively solves the problems that domestic and foreign three-core fiber technology cannot monitor multiple points simultaneously, as well as detection accuracy, sensitivity, false alarm rate, etc., The adaptability to different soils has been significantly improved;
3) Achieve the integration and application of location-type optical fiber vibration sensing technology, area-type optical fiber vibration sensing technology and optical fiber temperature sensing technology in safety early warning applications of long-distance gathering and transportation pipelines in oil fields.
2013-2015 In 2001, relying on this achievement, we completed the Xinjiang Halahatang Gathering Pipeline Project, Shenzhen Power Supply Bureau Cable Theft Prevention Project, Shenzhen Power Supply Bureau Meixiang Line A and B Project, South-to-North Water Diversion Middle Route Project, Shenzhen Mintian Project, Shenzhen Deepwater Project, Shenzhen Xianre Project, etc. The total sales contract amount is 64 million yuan. It has created indirect economic benefits of more than 40 million yuan in many application units such as the South-to-North Water Diversion Project, Shenzhen Power Grid, Guangzhou Power Grid, and China Oil Field Pipeline, while avoiding economic losses of nearly 30 million yuan.
A total of 30 patents have been authorized for this project, of which 12 invention patents have been authorized, 12 utility model patents have been authorized, and 6 software copyrights have been registered. A total of 16 papers have been published, including 14 in core journals, with nearly 60 citations. As the main participating editor, he has compiled China Public Security Industry Standard GA/T-1217-2015 "Technical Requirements for Optical Fiber Vibration Invasion Detectors" and others.