Water pipe network dma leakage analysis system

Abstract

The invention discloses a water affair pipe network DMA leakage analysis system. The pipe network wall thickness information detected by three Hall sensors uniformly arranged in a DMA (direct memory access) area is subjected to calculation of average wall thickness information by an average value calculation circuit taking an operational amplifier AR 1 as a core, and then enters preprocessing circuits; 1 / 10 proportion attenuation is carried out on one path of the information through an amplifying circuit taking an operational amplifier AR 3 as a core, and the average wall thickness informationafter 1 / 10 attenuation provides a power supply for a hysteresis comparison circuit; and the other path of the information is converted into a positive difference value by calculating the difference value between the pipe network wall thickness information detected by an electromagnetic sensor and the average wall thickness information, and enters a hysteresis comparison circuit for preliminary judgment. When the positive difference value is lower than the average wall thickness information after 1 / 10 attenuation, the average wall thickness information is transmitted to a host computer throughone path; and when the positive difference value exceeds the average wall thickness information after 1 / 10 attenuation, the pipe network wall thickness information that three Hall sensors detected all transmits to the host computer. Therefore, by preprocessing the information transmitted to the host computer, the information transmission quantity is reduced and the analysis efficiency of the hostcomputer is improved on the premise of ensuring the leakage detection quality.

Description

Technical field[0001]The invention relates to the technical field of pipeline network leakage analysis, in particular to a DMA leakage analysis system of a water pipeline network.Background technique[0002]Through the implementation of multi-level DMA block and network for the water pipe network, the flow and pressure monitoring are carried out step by step, and the regional pressure can be controlled. This can greatly improve the efficiency of leak detection, shorten the time of leak detection, and control the severity of leakage. Select points in each area of ​​DMA to configure leak detectors, flow meters, pressure recorders, Hall sensors, etc. to collect data, and transmit them to the host through the network for water balance data analysis to determine the leakage level of the current management leakage and optimize The setting and opening of the pressure reducing valve means that the leakage is reduced through pressure regulation and the leakage is maintained at an optimal level...

AI Technical Summary

Problems solved by technology

[0002] By implementing multi-level DMA blocks and networking for the water pipe network, flow and pressure monitoring are carried out step by step, and regional pressure regulation is realized, which can greatly improve the efficiency of leak detection, shorten the time of leak detection, and control the seriousness of leakage. Select points in each area of ​​the DMA to configure leak detection instruments, flow meters, pressure recorders, Hall sensors, etc. to collect data, transmit it to the host computer through the network, and analyze the water balance data to determine the leakage level of the current management leakage and optimize it. The setting and opening of the pressure reducing valve means that the leakage is reduced through pressure regulation and the leakage is maintained at an optimal level. The wall thickness of the metal pipe network is detected by the Hall sensor as a basis, and the host computer judges the physical leakage (iron, steel, etc.) Whether the structure of the pipe network itself is broken, etc.) Whether there is leakage, due to the variety of pipe network pipe materials, old replacement pipes and fittings, and internal corrosion of the pipe caused by electric corrosion, the deviation of the detected wall thickness information range will be large. If the host adopts a unified Analyzing and judging by quantitative standards will cause the main engine to misjudge it as leakage. If the main engine should adopt corresponding quantitative standards for different pipe materials and different degrees of corrosion, it will affect the analysis efficiency of the main engine

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