A Self-diagnostic Method for the Electrode Adhesion of an Electromagnetic Flow-meter
- Resource Type
- article
- Authors
- Wen-Hua Cui; Bin Li; Xue-Jing Li; Song Gao
- Source
- Sensors & Transducers, Vol 174, Iss 7, Pp 193-198 (2014)
- Subject
- Electrode adhesion self-diagnosis
Electromagnetic flow-meter
Dual excitation
Photovoltaic cell.
Technology (General)
T1-995
- Language
- English
- ISSN
- 2306-8515
1726-5479
Electrodes of electromagnetic flow-meter are subject to contamination in sewage measurement. In this paper, the relationship between the internal resistance of the flow-induced voltage and the electrode contamination is analyzed on the basis of numerical analysis. A new self- diagnostic method for electrode adhesion with additional excitation based on photovoltaic cell is proposed, in which magnetic excitation for flow-rate measurement and electric excitation for electrode self-diagnosis is divided in both time domain and frequency domain. A dual-excited electromagnetic flow-meter with electrode self-diagnosis was designed and validated. Simulation experiments based on the change of the internal resistance of the flow-induced voltage were carried out. And the experimental results fully show that this new method is feasible and promising.