基于GPS时间标签的管道泄漏定位方法

快速、精确地定位管道泄漏是检测泄漏的一项重要内容，采用GPS同步时间脉冲信号强化各传感器数据采集的信号同步，通过采样频率与时间标签的换算可以分别确定管道泄漏点上游和下游的泄漏负压波的速度，然后利用泄漏点上下游检测到的泄漏特征信号的时间标签差就可以确定管道泄漏的位置。信号采样频率越高定位精度越高。但采样频率过高会增加处理的数据量，从而降低泄漏检测的速度。

Method of Locating Position of Pipeline Leaking Based on the Time Label

localizing the pipeline leaking with rapidity and exactness is of vital importance in detecting leaking. GPS's sync pulse is utilized to intensify the synchronization of data gathering signals of the sensors. By conversing sample frequency and time-label, the negative compression wave velocity of up and down leaking site on pipeline is identified respectively, as a result, the difference between the time-label is acquired and thus the leaking site is identified. The more frequent the sampling is, the higher the precision of the localization is. But the high frequency of sampling will result in the increase in data collecting, thus reduce the velocity of leaking detection.