Compensated vane airflow meter

Details Compensated vane airflow meter Compensated vane airflow meter

1980-05-15

1982-03-02

Myracle, Jerry W.

Measuring and testing

Volume or rate of flow

Using differential pressure

123442, G01F 138

Patent

active

043173748

ABSTRACT:
An airflow sensor with a rectangularly shaped sensing vane is disclosed. The vane is pivotally mounted in a cylindrical bore perpendicular to the airflow direction of the sensor and yields an airflow signal proportional to its angular rotation. An air motor mechanically coupled to the vane maintains a constant pressure drop across the vane. The air motor assists in pivoting the vane by magnifying the force on the vane for changes in airflow. In one embodiment, a gas filled bellows modifies the positioning of the vane by the air motor to compensate for temperature and barometric variations. In another embodiment, an absolute pressure sensor, located between the vane and a throttling member, compensates for barometric changes and transient delays in the response of the vane.

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patent: 4089308 (1978-05-01), Pierlot
patent: 4096838 (1978-06-01), Tanaka et al.
patent: 4121545 (1978-10-01), Mizote

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