Vibrating tube meter
US6763730B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2002 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Mar 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2009/006
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a vibrating tube meter such as a Coriolis meter, an accurate measurement of a fluid parameter such as density can be obtained, substantially independent of stress, by measuring vibrational characteristics, particular resonant frequencies of two different vibrational modes. Stress or other variables can be determined from the measurement. Because the measurement of or compensation for stress is based directly on the vibrational characteristics, better accuracy may be obtained than by using a conventional strain gauge to measure stress. The techniques disclosed can give accurate results without requiring particular constraints on meter design.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.