Vibratory sensor and method of varying vibration in a vibratory sensor
US10955326B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2018 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Jun 6, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02818
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vibratory sensor (5) includes a vibratory element (104), a receiver circuit (134) that receives a vibration signal from the vibratory element (104), and a drive circuit (138) that generates a drive signal. The drive circuit (138) includes a closed-loop drive (143) and an open-loop drive (147). The meter electronics (20) vibrates the vibratory element (104) commencing at a commanded first frequency and in an open-loop manner to achieve a first target phase difference ϕ1 for a fluid being characterized and determines a corresponding first frequency point ω1, vibrates the vibratory element (104) commencing at a commanded second frequency and in the open-loop manner to achieve a second target phase difference ϕ2 and determines a corresponding second frequency point ω2, and determines a viscosity of the fluid being characterized using the first frequency point ω1 and the second frequency point ω2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.