Long-distance water delivery pipeline online water hammer backtracking method based on negative pressure wave

By adjusting the parameters of the Savitzky-Golay filter and the first-order difference using an adaptive optimization algorithm, and combining it with the continuous same-sign criterion, accurate positioning of negative pressure waves in long-distance water transmission pipelines was achieved. This solved the problem of inaccurate water hammer tracing in existing technologies and improved the real-time performance and reliability of tracing.

CN121561832BActive Publication Date: 2026-06-05JILIN WATER RESOURCE & HYDROPOWER CONSULTATIVE CO OF P R CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-01-22
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies struggle to accurately identify abrupt changes in negative pressure waves in long-distance water pipelines, leading to inaccurate water hammer tracing and positioning, and failing to meet the real-time and accuracy requirements of online monitoring in engineering projects.

Method used

An adaptive optimization algorithm is used to adjust the parameters of the Savitzky–Golay filter. Combined with the first-order difference and the continuous same-sign criterion, the accurate positioning of the negative pressure wave is achieved through multi-sensor collaborative calculation.

Benefits of technology

It improves the signal-to-noise ratio, stability, and accuracy of abrupt change point identification of negative pressure wave signals, thereby enhancing the real-time performance and reliability of water hammer tracing.

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Abstract

The application discloses a long-distance water delivery pipeline online water hammer tracing method based on negative pressure waves, comprising the following steps: obtaining a pipeline pressure signal of a long-distance water delivery pipeline; preprocessing the pipeline pressure signal of each key node; smoothing filtering the preprocessed signal through an S-G filter; taking the window length, polynomial order and derivative order of the filter as adjustable parameters; adaptively searching and adjusting the adjustable parameter combination; obtaining a filtering result; constructing a comprehensive score function based on the filtering result; screening an optimal parameter combination according to the comprehensive score function; performing difference operation and continuous same sign judgment on the filtering signal of the optimal parameter combination; obtaining a negative pressure wave arrival time; and obtaining a water hammer tracing result according to the negative pressure wave arrival time. The method utilizes adaptive filtering, continuous same sign criterion and the collaborative calculation of a multi-sensor pair, reduces the influence caused by the abnormality of individual sensors or local errors, and improves the real-time performance and reliability of water hammer tracing in long-distance water delivery projects.
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Citation Information

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