检测石油管道冰堵与定位的光纤传感器的研究

Study on optical fiber sensor for detection and positioning of oil pipeline ice-blocking

寒冷地区成品油管道冰堵现象时有发生。利用分布式光纤传感器检测管道沿途发生的冰堵信息;利用具有表征信号局部特征能力的小波分析的方法确定光纤两端2个测试信号的时延,进而即可确定冰堵点的位置。阐述了其测试原理和堵塞点定位方法,理论分析和仿真实验结果表明:该方法可以有效提高管道冰堵测试的灵敏度和定位精度。

The phenomena of pipeline ice-blocking occurs from time to time in cold regions. Distributed fiberoptic sensor is used to detect the information of ice-blocking occurred along the pipeline. The method of wavelet analysis which has the capacity of local signal characteristics is used to determine the time delay of two test signals at both ends of the optical fiber. Then the location of the point of ice blocking can be determined. The testing principle and the method of plugging point positioning is described. Theoretical analysis and simulation results shows that this method can effectively improve the sensitivity and positioning precision of pipeline ice-blocking test.