负向压力波 [流] negative pressure wave
The paper makes use of multi-scale wavelet transform to detect the arriving time of the pressure wave to the both ends of the pipeline.
使用多尺度小波变换捕捉管道两端负压力波的到达时刻，有效地检测出了信号的突变，并能够较好地克服由于噪声存在而给定位带来的误差。 针对其它一些影响管道泄漏检测与定位的问题进行了研究。
参考来源 - 输油管道泄漏检测技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
结合管道两端接收到负压力波的时间差，采用遗传算法搜索管道内的泄漏点。
Combining with the time difference value of the pressure wave getting to both ends of the pipeline, adopts the Genetic Arithmeticto search the leak site of the pipeline.
在一定长度的管线两端安装传感器 ，测量出由于漏油而产生的负压力波 ，根据负压力波传到两传感器的时间差计算出漏点的位置。
One of the key technologies of the method is to determine the time between suction waves going through the two measuring points of the pipeline.
采用了瞬态负压波法、流量输差法和压力流量综合法等多种泄漏诊断方法。
Several leak diagnosis methods such as instantaneous negative pressure wave, flow-lack, and hybrid diagnostic method were used.
应用推荐