Apparatus and method for determining flow of a medium
US10337904B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2014 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Jun 22, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/6845
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A thermal flow sensor for determining flow of a medium, comprising: a substrate; first and second temperature sensors arranged on the substrate, wherein the first and second temperature sensors are embodied as heatable temperature sensors or as a first non-heatable temperature sensor, which is associated with a first heating element, and as a second non-heatable temperature sensor, which is associated with a second heating element; a power supply unit, which by means of a first signal supplies the first heatable temperature sensor or the first heating element with a first heating power determined earlier during an adjustment operation and by means of a second signal supplies the second heatable temperature sensor or the second heating element with a second heating power determined earlier in the adjustment operation; and an evaluation unit, which in a measurement operation for determining flow of the medium ascertains a temperature difference between the first temperature sensor and the second temperature sensor and based on the temperature difference determines a measured value, which represents the flow of the medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.