Drag anemometer

Details Drag anemometer Drag anemometer

1984-12-14

1986-12-30

Ruehl, Charles A.

Measuring and testing

Navigation

Leeway incidence or side-slip

7386171, 7386261, G01W 102, G01P 502

Patent

active

046319590

ABSTRACT:
An anemometer for measuring the velocity of a fluid. The anemometer has a pivotally mounted shaft with a drag element mounted thereon for exposure to the fluid. Electromagnets are orthogonally located adjacent to a ferrite block on the shaft, and changes in position of the shaft are sensed by changes in voltage across the electromagnets. A controller senses these voltage changes and applies current to the electromagnets to produce electromagnetic force to restore the position of the shaft and balance the fluid force on the drag element. A micro-processor computes fluid speed and direction from the current applied to the electromagnets.

REFERENCES:
Dessureault et al., "Design of a Tri-Axial Thrust Anemometer for Measurement of Atmosperic . . .", Ocean Engng., vol. 7, No. 4 (1980), pp. 521-537.

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