Velocity pressure averaging system

Details Velocity pressure averaging system Velocity pressure averaging system

1981-01-23

1983-06-14

Krass, Errol A.

Boots, shoes, and leggings

7386102, 7386148, 364575, G06F 738

Patent

active

043886914

ABSTRACT:
A device which can determine either the velocity pressure or the velocity of a flowing gas or air stream and averages same over a predetermined period of time is disclosed. The device utilizes a three-hole yaw probe or similar sensing means which is immersed in the stream to provide measurements of both static pressure differential and velocity pressure. The device includes a null threshold detector (14) which permits the processing of velocity pressure measurements only when the static pressure differential is within a pre-set range thus insuring the proper alignment of the probe or other sensing means in the stream. A square root extractor (20) and switching means (22) are also provided permitting the measurement and averaging of the square root of the velocity pressure measurement, i.e., velocity of the stream, by the device. The velocity pressure measurements or the square root thereof are exhibited on a first digital display (28) permitting the operator to monitor the measurements as they are taken. The measurements are subsequently averaged over a predetermined period of time by an arithmetic processor (18) and the resulting average is exhibited on a second digital display (30).

REFERENCES:
patent: 3378676 (1968-04-01), Clement
patent: 3553444 (1971-01-01), Tong
patent: 3673392 (1972-06-01), Holm
patent: 3678257 (1972-07-01), Lilley et al.
patent: 3929017 (1975-12-01), Kowalski
patent: 3934471 (1976-01-01), White et al.
patent: 3949608 (1976-04-01), Abbey et al.
patent: 4193118 (1980-03-01), Nash et al.
patent: 4300401 (1981-11-01), Pedersen

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