Detection method of detection device for drainage pipeline blockage faults

Abstract

The invention discloses a detection method of a detection device for drainage pipeline blockage faults. The method comprises the steps that the detection device for the drainage pipeline blockage faults is arranged; a computer obtains a signal of a normal / blocked pipeline from the receiving end; acoustic response signals in two working conditions of a drainage pipeline are acquired; LMD decomposition is conducted on the acoustic response signals of the normal pipeline and the blocked pipeline; correlation coefficients of all PF components of the normal pipeline and an original signal and correlation coefficients of all PF components of the blocked pipeline and the original signal are calculated by adopting a Pearson correlation coefficient method, and each component of which the correlation coefficient exceeds 15% is taken as an effective PF component signal; energy entropy indexes, approximate entropy indexes and average acoustic pressure indexes of the effective PF components of the normal pipeline and the blocked pipeline are calculated to serve as a characteristic set; an optimal parameter of the characteristic set is sought through a K-CV method; the steps are repeated, and fault identification is conducted on other sections of the pipeline by adopting an SVM classifier with the trained parameter. According to the detection method, the detection procedure is conveniently conducted, and the accuracy and reliability of a detection result are improved.

Description

technical field

[0001] The invention relates to a detection method of a detection device used for blocking faults of drainage pipes, and belongs to the field of detection of pipe faults. Background technique

[0002] A clogged drain is a malfunction that affects the proper functioning of the plumbing. Many blockages are only small or half-blocked in the early stage, which are easily overlooked by inspectors. In the end, the blocked area will expand, which will not only cause the pipeline to fail to supply water normally, but may also cause safety problems. Since most urban drainage pipes are buried deep underground and have complex lines, it is difficult to detect clogging faults. Therefore, according to the actual situation, there is an urgent need for a method that can adapt to complex pipeline conditions and can effectively detect blockage faults in underground pipelines.

[0003] There are several methods for fault detection of pipelines. At present, the commonly used...

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