Method and structure for flow measurement
US4187721A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 20, 1978 |
| Grant date | Feb 12, 1980 |
| Priority date | — |
| Expiry date | Jul 20, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/8472
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and method for mass flow measurement utilizing a substantially "U" shaped conduit mounted in a cantilever manner at the legs thereof, means for oscillating the conduit, and means for measuring the Coriolis force by measurement of the force moment or the angular motion of the conduit around an axis substantially symmetrical to the legs of the conduit. The force moment is measured by sensing incipient movement around the axis, and generating and measuring a nulling force. In preferred embodiments, the oscillating means are mounted on a spring arm having a natural frequency substantially equal to that of the "U" shaped conduit, and in a particularly preferred displacement the measuring means are sensors mounted on the "U" shaped conduit and adapted to measure, with proper direction sense, the time differential between the leading and trailing portions of the "U" shaped conduit passing through the plane of the "U" shaped conduit at substantially midpoint of the oscillation thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.