PCCP burst pre-warning monitoring system based on sound signal

Abstract

The invention provides a PCCP burst pre-warning monitoring system based on a sound signal. The PCCP burst pre-warning monitoring system comprises a sensor, a signal conditioning circuit, a data acquisition module and a data transmission module. The sensor is sequentially connected with the data acquisition module and the data transmission module through the signal conditioning circuit. The data transmission module is connected with a remote data service center in a wireless mode. The PCCP burst pre-warning monitoring system based on the sound signal has the advantages of being high in sampling accuracy, sampling rate and transmission rate, low in power consumption and the like. It is indicated by the ship pool experiment that after a wire breakage sound signal is spread by 100 meters, the signal to noise ratio is still remarkable, that is, the wire breakage sound signal still can be observed more obviously. It is indicated by the PCCP field experiment that the identification accuracy of the wire breakage sound signal can be improved to 98.33% through wavelet feature extraction and support vector machine identification.

Description

technical field [0001] The invention belongs to the technical field of computer control, in particular to an acoustic signal-based PCCP pipe burst early warning and monitoring system. Background technique [0002] Prestressed steel cylinder concrete pipe (referred to as PCCP) refers to a water delivery pipe made by winding a hoop prestressed steel wire on a high-strength concrete core with a steel cylinder, and then spraying a dense cement mortar protective layer on it. It is a composite pipe composed of thin steel plate, high-strength steel wire and concrete, which fully and comprehensively exerts the tensile strength and easy sealing of steel and the compression and corrosion resistance of concrete, and has high sealing performance, high strength and high impermeability characteristics. The prestressed steel cylinder concrete pipeline was first designed and manufactured by the French Bonner Pipeline Company, and it has a long history. In the 1940s, European and American ...

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Problems solved by technology

These pipe burst accidents are all caused by cement expansion. The pipe burst accident directly leads to the scrapping of the laid pipelines, so they have to be dug out for replacement and laying.

In the process of producing PCCP for Nanshan Group in a cement product factory in Shandong Province, due to steel quality problems, the pipe burst and suffered heavy losses; the water company in Shijiazhuang City used three-stage prestressed steel cylinder concrete pipes to lay pipes. The quality of the external concrete protective layer of the tubular concrete pipeline caused a serious pipe burst accident within a few years of water operation and had to be replaced; there were also eight prestressed steel tubular concrete pipeline explosions in Baoji City that were reported by TV stations. There are also news reports that the three-stage prestressed concrete pipes produced by some enterprises in Hubei Province, due to the poor quality of the protective layer and the high groundwater level, have a pipe burst accident after only three years of laying and use.

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