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为了解决固定位置的声/振动干扰源引起的管道泄漏声检测的虚警或者漏点定位错误问题,利用泄漏信号源和固定干扰源之间的独立性,通过盲卷源分离算法得到泄漏信号在一定代价函数下的最优估计,并将该估计作为输入信号从检测信号中自适应预测得到泄漏信号,这样就可以保留泄漏信号中的时延信息。对实际检测信号的处理表明,应用提出来的方法可以有效的去除检测信号中来自固定干扰源的噪声,同时不损失泄漏信号中的时延信息,可在固定干扰源存在时实现管道泄漏有效检测和准确定位。
In order to solve the false alarm or leaky location error of pipeline leak sound detection caused by fixed position acoustic / vibration interference sources, the leakage signal is obtained by blind source separation algorithm by using the independence between leakage source and fixed interference source A certain cost function of the optimal estimation, and the estimate as the input signal from the detection signal adaptive prediction of the leakage signal, so you can keep the leakage signal delay information. The processing of the actual detection signal shows that the proposed method can effectively remove the noise from the fixed interference source in the detection signal without losing the delay information in the leakage signal and can effectively detect the pipeline leakage in the presence of a fixed interference source And accurate positioning.