Measuring and testing – Volume or rate of flow – Using differential pressure
Patent
1994-09-09
1996-01-09
Chilcot, Richard
Measuring and testing
Volume or rate of flow
Using differential pressure
7386165, G01F 146
Patent
active
054819253
ABSTRACT:
An airflow sensor is designed with features which enhance the accuracy of measurement. The central hub of the airflow sensor is made in an air foil shape to reduce noise and turbulence at that region. The airflow sensing tubes extend radially outwardly from the central hub and are made extremely thin in profile to minimize turbulence. Each airflow sensing tube has a plurality of spaced airflow receiving openings therethrough which are spaced from one another in a manner permitting each opening to receive air from a volume of air equal to the volumes of air from which other holes receive air flow. The downstream air collection tubes are circumferentially spaced between the first-mentioned airflow sensing tubes and have open ends to receive air from the open areas between the first-mentioned airflow sensing tubes. The airflow sensor is designed to be mounted within a conduit of generally circular cross-section and the mounting devices which mount the outer ends of the tubes to the inner walls of the conduit have turbulence-reducing air foil shapes.
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Artis Jewel V.
Chilcot Richard
Environmental Technologies, Inc.
Larson Herbert W.
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