Electromagnetic flowmeter
US9976884B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2016 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | Dec 7, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/586
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is provided an electromagnetic flowmeter including a measurement tube through which fluid to be measured flows, a lining which covers an inner side of the measurement tube, electrodes which are respectively inserted into through-holes formed in the lining and which output a detection signal based on an electromotive force generated in the fluid, and a lining wear detection unit which measures a magnitude of a slurry noise included in the detection signal to detect wear of the lining. The electrodes are configured such that a portion in contact with the fluid in a state where the lining has no wear is coated with a porous insulating material. The lining wear detection unit detects the wear of the lining by comparing the magnitude of the measured slurry noise with the magnitude of the slurry noise in the state where the lining has no wear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.