385 results about "Real signal" patented technology

The invention discloses a method for identifying pipeline leakage, which comprises the following steps: aiming at two observation signals of adjacent sensors, using the signals as an input signal and a reference signal of a self-adapting filter respectively, and extracting a weight vector of the filter during convergence, wherein the weight vector is the optimal estimation of the correlation functions of the two observation signals; judging that a pipeline probably leaks when the weight vector of the filter during the convergence has a peak value, otherwise judging that the pipeline has no leakage; and when the judgment result is that the pipeline probably leaks, calculating the weight vector complexity value of the part beyond one neighborhood of the envelope peak value of the weight vector, and inputting the weight vector complexity value into a decision algorithm to finally determine whether the pipeline leaks really. The method has the following technical advantages: not only the noise-signal ratio of signals is improved, but also the correlated characteristics about leakage signals shared in the two signals are highlighted, and the decision algorithm is adopted to perform quantitative analysis on the complexity of the self-adapting filtering weight vector, eliminate noise interference and identify whether a signal source is a real signal source having the leakage.