Mass flow sensor and method for operating the mass flow sensor

Details Mass flow sensor and method for operating the mass flow sensor Mass flow sensor and method for operating the mass flow sensor

2007-01-09

2007-01-09

Patel, Harshad (Department: 2855)

Measuring and testing

Volume or rate of flow

Proportional

C073S204220

Reexamination Certificate

active

11061855

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.

REFERENCES:
patent: 6336361 (2002-01-01), Uramachi et al.
patent: 6729182 (2004-05-01), Uramachi et al.
patent: 6826955 (2004-12-01), Zurek et al.

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