这个文件上传包含GUI (FiberSesorLeakDetectionREV2.mlapp)是连接Picoscope Matlab从我们的传感器采集信号,以及执行信号分析上收集到的信号确定泄漏位置漏水的钢铁管道。
包括PicoScope3000SeriesAApiProgrammersGuide。pdf解释了函数用于控制Picoscope test_2channels_GUI.m
testanalysiscrtnewfld.mis the signal analysis script. The analysis of the signal starts with performing wavelet de-noising to remove the background/noise profile in the leak signal. The analysis is then continued with pulse conversion where the de-noised signal is converted into a series of square waves using thresholding method. The threshold used here is based on the study of the amplitude of the collected leak signals that indicates the first impact of the acoustic wave onto the sensor. Note that the amplitude is not the maximum amplitude of the signal, instead it is a value very close to zero.

这种转换的目的是使收集到的泄漏信号通道/两传感器相同,而仍然保持它们之间的时间滞后,这样互相关的结果可以提高,可以更准确地查明泄漏腔的位置漏水的管道。

在GUI交互相关图是显示信号的互相关的结果除以9重复收集,在这种情况下。互相关的结果的方差低于某个值意味着信号采集的信号从一个真正的泄漏。