摘要
利用序贯概率比检验法检测油气管道泄漏是一种较新的方法。针对原始压力信号噪声的非高斯性,采用卡尔曼滤波器进行预处理,提高了序贯法判断泄漏的准确性。分析了传统压力梯度法的不足,借鉴负压波定位中的时间差法定位泄漏点,提高了定位的精度。实验结果表明,这种管道泄漏检测方法值得推广。
The sequential probability ratio test (SPRT) can be applied only to the case that there is only white Gauss noise in the pressure signal. Kalman filter was used to pretreatment of pressure signal to obtain the real data similar to Gauss distribution. Then SPRT was used to determine leakage of pipeline. For improving the detecting accuracy of leakage positions on pipeline with SPRT, a new method based on time diversity was proposed. The deficiencies of existing pressure gradient localization method were analyzed. The experimental results proved the superiority of the proposed method.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2005年第4期123-126,共4页
Acta Petrolei Sinica
基金
国家自然科学基金"热油长输管道泄漏检测与定位技术研究"(NO.69574020)资助。
关键词
管道
泄漏检测方法
序贯概率比检验法
卡尔曼滤波器
压力梯度法
pipeline
leakage detection
sequential probability ratio test
Kalman filter
pressure gradient method
