公开(公告)号：US20180136076A1

公开(公告)日：2018-05-17

申请号：US15573039

申请日：2016-03-10

Applicant: NEC CORPORATION

Inventor： Yukitaka KUSUMURA ,  Sergey TARASENKO ,  Riki ETO ,  Yusuke MURAOKA ,  Ryohei FUJIMAKI

IPC: G01M3/28

CPC classification number: G01M3/28

Abstract: This invention provides a water-leakage state estimation system configured to estimate a state of a water leakage in a specific area of a water distribution network. A learning unit is configured to: receive labeled data, which is labeled so as to separate past flow rate data into abnormal values and normal values, and past environment state condition data; build a prediction model for predicting the normal values in the labeled data through learning; and determine a score parameter defining a length of a period involving data to be verified through learning as well. A water-leakage estimation unit is configured to: compare predicted flow rate data obtained by supplying current environment condition data into the prediction model and current flow rate data to produce error values; and calculate an average value of the error values in the period of a window width defined by the score parameter to estimate a water-leakage score representing a state of the water-leakage in the specific area.