On-line operation state diagnostic method for pipeline pressure monitoring equipment of urban water supply pipe network

Abstract

The invention discloses an on-line operation state diagnostic method for pipeline pressure monitoring equipment of an urban water supply pipe network. According to the method, monitoring data are obtained on the basis of historical monitoring data, and basic parameters exceeding the top and bottom limitations, and a linear fitting formula are judged; and when remote pressure monitoring data are received, firstly, whether the monitoring data are within the overtime range is judged, secondly, whether the monitoring data are completely consistent with data of last three times is judged and compared, and whether communication and data collecting are failed is judged, thirdly, whether the monitoring data exceed the top and bottom limitations, and the fitting error between the monitoring data and other monitoring points exceeds the two-time standard deviation is calculated, the failure probability and normal probability of the pressure monitoring data are calculated, weighted average evidence is compounded through the D-S compound rule, and whether data collected by pressure monitoring equipment is normal is judged. Mutual verification is conducted through the mutual relation between instruments, the situation that it is not found in time that a pressure sensor does not conduct normal communication or deviates from normal monitoring in the wild is avoided, and integrity and normal operation of a water supply monitoring system are ensured.

Description

technical field [0001] The invention relates to a method for diagnosing the online running state of pipeline pressure monitoring equipment of an urban water supply pipeline network, in particular to whether the remote transmission pressure monitoring equipment of the pipeline network normally collects data and whether the remote communication is normal. Background technique [0002] With the advancement of urbanization and the expansion of city scale, there are more and more pressure monitoring instruments in the urban water supply network. The arrangement of pressure sensors in the water supply system serves a variety of purposes, including knowing whether the pressure in the monitored area is stable, monitoring whether the pressure at the most unfavorable point of the water supply network meets the municipal permit requirements, and monitoring whether there is a pipe burst accident in the local pipe network. [0003] Since most of the remote pressure sensors of the pipelin...

AI Technical Summary

Problems solved by technology

If the upper and lower limit thresholds are simply defined to judge whether the instrument is normal, it is easy to cause misjudgment: when the upper and lower threshold ranges are too large, it is easy to miss wrong data; Judging the effectiveness and accuracy of remote pressure sensors in the pipe network, and judging whether the communication is normal

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