摘要
设计了一套基于动态压力变送器的输油管道泄漏检测与定位系统,阐述了其系统组成和检测原理。通过动态压力变送器获取管道的动态压力信号,采用基于经验模态分解的方法提取信号的特征向量,再利用支持向量机实现对管道泄漏的识别。最后采用相关时延估计算法获得管道泄漏点的位置。通过现场应用实例表明,动态压力变送器具有更高的检测灵敏度和泄漏分辨力。该系统能够对管道泄漏进行正确识别,可以有效地降低误报警率,并提高了泄漏检测的灵敏度和定位精度。
A leak detection and positioning system of oil pipeline based on dynamic pressure transmitter is designed, and the system composition and testing principle are specified. Dynamic pressure signals along the pipeline can be obtained by dynamic pressure transmitter, and then the pipeline leak can be recognized by support vector machine （SVM） through the eigenvectors of the signals extracted by empirical mode decomposition （EMD）. At last the position of leaking point is calculated by adopting the correlation time delay algorithm. The application examples show that the dynamic pressure transmitter has higher detection sensitivity and leak resolution. The system can identify the pipeline leak correctly,reduce false alarm rate effectively and improve detection sensitivity and positioning precision.
出处
《传感技术学报》
CAS
CSCD
北大核心
2009年第9期1347-1351,共5页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金重点项目资助(60534050)
天津市自然科学基金项目资助(06YFJMJC02000)
关键词
管道
泄漏检测
动态压力变送器
经验模态分解
支持向量机
pipeline
leak detection
dynamic pressure transmitter
empirical mode decomposition
support vector machine
