G - Physics – 01 – L
Patent
G - Physics
01
L
73/125, 73/129,
G01L 7/00 (2006.01) G01F 1/34 (2006.01) G01L 19/00 (2006.01) G01P 5/165 (2006.01)
Patent
CA 1230504
METHOD AND APPARATUS FOR CORRECTING BAROMETRIC PRESSURE FOR WIND VELOCITY AND DIRECTION ABSTRACT OF THE DISCLOSURE A method and a sensing instrument are claimed for sensing atmospheric pressure. The instrument 24 comprises an enclosure 26 that has a shape exposed to a fluid medium, which fluid medium may be moving at a certain velocity relative to the sensing instrument. The sensing instrument has at least one port 28 open to the fluid medium for sensing the velocity of the medium and for measuring a pressure of the fluid medium. The measured pressure is corrected for the effects of the velocity of the medium according to the formula PATM PM + K2 V2 where PATM is atmospheric pressure, PM is measured pressure in the enclosure means, R2 is a constant that is a function of the shape of the enclosure means, the shape of the port means and the density of the medium and V is the velocity of the medium.
463895
Marks & Clerk
Rosemount Inc.
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