Sensor temperature control in a thermal anemometer
US6905242B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2004 |
| Grant date | Jun 14, 2005 |
| Priority date | — |
| Expiry date | Jan 12, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/6965
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A thermal anemometer that separates sensor heating from sensor temperature measurement through a switched sampling technique. This approach demonstrates several advantages over the more typical circuitry employing a bridge, which simultaneously heats the sensor and senses the ambient and velocity sensor temperature. In a thermal anemometer in accordance with the present invention, sensor temperature is determined by sampled measurement of its resistance. Sensor temperature is controlled by varying the voltage applied to the sensor with an error value determined by the difference between actual sensor resistance and the desired resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.