Mass flow sensor and method for operating the mass flow sensor
US7159457B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 2005 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | Apr 9, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/6842
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A mass flow sensor (1) has a sensor element whose measuring signal is representative of a mass flow in a main duct (4), specifically without taking into account the direction of flow of the mass flow which flows past the sensor element. In addition, a further sensor element is provided which is arranged in a recess in a body and which is coupled via a coupling element to the main duct (4), with the coupling element being embodied in such a way that the recess lies in the wind shadow of the main direction of flow of the mass flow in the main duct (4) and brings about a flow in the recess counter to the main direction of flow. A mass current is determined in the main duct (4) as a function of the measuring signal of the sensor element. A correction value is determined as a function of the measuring signal of the further sensor element. The mass flow which is determined is corrected by means of the correction value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.