公开(公告)号：US20230366721A1

公开(公告)日：2023-11-16

申请号：US17857563

申请日：2022-07-05

申请人： CHONGQING UNIVERSITY

发明人： Ke ZHANG ,  Yi CHAI ,  Yalin QIAN ,  Huaxiang PU ,  Jialu WANG ,  Qianqian SONG ,  Keyue QIU ,  Xichen LI ,  Yiyao AN

IPC分类号： G01F25/10 ,  G01F1/60

CPC分类号： G01F25/10 ,  G01F1/60

摘要： A method and system for detecting dirt on an electrode of an electromagnetic flowmeter are provided. The method includes: under three different conditions acquiring resistance values between the electrode and ground to form a first dataset, second datasets, and a sample set to be tested; extracting a positive definite feature matrix corresponding to each sample batch and calculating a Riemann center thereof; calculating a similarity index between the sample feature matrix and each of the first feature matrices and the second feature matrices; extracting l feature matrices with a largest similarity index, and calculating a local Riemann center thereof; and calculating proximity between the local Riemann center and each of the second Riemann centers, and determining that a Riemann center with the greatest proximity corresponds to dirt on the electrode corresponding to the sample set to be tested. The method can achieve a online rapid detection of dirt on the electrode.