Method and system for detecting dirt on electrode of electromagnetic flowmeter

US12320693B2 · kind B2 · utility

Assignee

• CHONGQING UNIVERSITY · CN

Inventors

• Ke Zhang · Beijing, CN
• Yi Chai · Beijing, CN
• Yalin Qian · Chongqing, CN
• Huaxiang Pu · Chongqing, CN
• Jialu WANG · Chongqing, CN
• Qianqian Song · Weifang, CN
• Keyue Qiu · Chongqing, CN
• Xichen Li · Chongqing, CN
• Yiyao An · Chongqing, CN

Key dates

• Filing date: Jul 5, 2022
• Grant date: Jun 3, 2025
• Expiry date: Dec 27, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F1/60
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

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 second feature matrices; extracting/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 online rapid detection of dirt on the electrode.