Extreme temperature flow meter
US4905522A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1987 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Aug 19, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F15/068
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A flowmeter has an elongated probe with a rotor positioned at the distal end of the probe for insertion into a fluid flow and an elongated conductor in the probe that terminates adjacent the rotor. A signal generator induces a standing wave on the conductor, and rotation of the rotor, which acts as a capacitor, induces a reciprocating phase shift in the standing wave. The rate of reciprocation of the phase shift, as well as the change in amplitude at a point on the conductor, is proportional to, and indicative of, the flow rate of the fluid and is detected and measured as an instrumentation signal. The probe, rotor, circuit insulation, and seal components are all fabricated of materials that withstand extreme temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.