Signal processing method, signal processing apparatus, and coriolis flowmeter
US8676517B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2009 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | Jan 22, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/8436
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A signal processing method for a Coriolis flowmeter including: performing frequency conversion of a first digital signal, the frequency conversion performed on the first digital signal modulating the frequency of the first digital signal so that the frequency of the first digital signal after the frequency conversion is 1/Nth of the frequency of the first digital signal before the frequency conversion, where N is an integer; performing frequency conversion of a second digital signal, the frequency conversion performed on the second digital signal modulating the frequency of the second digital signal so that the frequency of the second digital signal after the frequency conversion is 1/Nth of the frequency of the second digital signal before the frequency conversion; and measuring a phase difference between (i) the frequency converted first digital signal and (ii) the frequency converted second digital signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.