Method for determining and/or monitoring viscosity and corresponding apparatus
US9709475B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2014 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | May 22, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N9/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining and/or monitoring the viscosity of a medium, wherein a mechanically oscillatable unit is excited to execute oscillations based on an exciter signal, and wherein oscillations are received from the mechanically oscillatable unit and transduced into a received signal. The eigenfrequency and/or resonance frequency of the mechanically oscillatable unit and/or phase relationship between the exciter signal and the received signal are/is ascertained and/or monitored, and from changes in the eigenfrequency and/or resonance frequency and/or phase relationship, a change in viscosity is deduced and/or, based on dependencies of the oscillations on the viscosity of the medium, from the eigenfrequency and/or resonance frequency and/or phase relationship, viscosity is ascertained. In a second variant of the method, decay behavior of the mechanically oscillatable unit is evaluated. An apparatus for determining and/or monitoring viscosity is also presented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.