Device and process for measuring the velocity of flow of a fluid
US6338271B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1999 |
| Grant date | Jan 15, 2002 |
| Priority date | — |
| Expiry date | Sep 8, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/6888
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for measuring the velocity of flow of a fluid, with at least one thermocouple (10), whose junction point is arranged in the fluid, with an a.c. power source (11) heating the thermocouple to a working temperature higher than the temperature of the fluid and with an evaluating circuit (12, 13) processing the thermocouple voltage, is to be improved such that the temperature dependence of the heat conductivity of the fluid to be investigated is compensated in a simple manner. To accomplish this object, the temperature coefficient of the ohmic resistance of the thermocouple (10) is adapted to the temperature dependence of the heat conductivity of the fluid such that the heating power converted in the thermocouple (10) during a change in temperature and unchanged current varies by exactly the same amount as the amount of heat released to the fluid due to the changed heat conduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.