Small leakage detection method based on cumulative sum algorithm

The invention discloses a small leakage detection method based on a cumulative sum algorithm, and the method comprises the steps of collecting flow data of a water consumption stable time period, estimating a reference water consumption range of the water consumption stable time period through frequency statistics, verifying the reasonability of the estimated reference water consumption range through setting confidence, eliminating interference of large low-value fluctuation of flow data according to the reference water consumption range, and finally detecting small leakage in the DMA pipe network through a CUSUM algorithm. According to the invention, the change trend of the flow is analyzed through the CUSUM algorithm, so that the discovery time of small leakage events is greatly shortened, a manager can make a quick response and guide leakage detection personnel to optimize the priority of leakage detection, targeted and important leakage detection is achieved, and the invention hasrelatively high applicati