Automated flow measuring device

G - Physics – 01 – F

Patent

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Details

G01F 1/46 (2006.01) G01P 5/165 (2006.01)

Patent

CA 2121200

A probe (10, 110) for measuring fluid velocity through a conduit (61, 161) has a pitot tube (1, 101) connected to a multiple channel cylindrical conduit (14, 114) which is placed within a tubular housing (12, 112), Drive motors are provided to permit precise rotation and longitudinal movement of the cylindrical conduit (14, 141) and attached pitot tube (1, 101) in the conduit (61, 161), typically a stack or duct. At least one differential pressure gauge is connected to the cylindrical conduit (14, 114). A computer (30) directs movement of the cylindrical conduit (14, 114), receives differential pressure and static pressure readings from the differential pressure gauge and utilizes that data to calculate flow of the fluid through the conduit. The device is particularly useful for measuring stack gas flow which flow can be utilized to determine emissions of pollutants.

Sonde (10, 110) pour mesurer la vélocité d'un fluide à travers un conduit (61, 161). La sonde comprend un tube pilote (1, 101) raccordé à un conduit cylindrique à passages multiples (14,114) qui est logé dans un boîtier tubulaire (12, 112). La sonde comprend des moteurs d'entraînement qui assurent une rotation précise et un mouvement longitudinal du conduit cylindrique (14, 141) et du tube pilote qui y est rattaché (1, 101) dans le conduit (61, 161), habituellement une colonne ou un conduit. Au moins une jauge de pression différentielle est raccordée au conduit cylindrique (14, 114). Un ordinateur (30) qui dirige le mouvement du conduit cylindrique (14, 114) reçoit les lectures concernant la pression statique et la pression différentielle et utilise ces données pour calculer le débit du fluide à l'intérieur du conduit. L'appareil, qui est particulièrement utile pour mesurer l'écoulement des gaz de carneau, peut être utilisé pour calculer les émissions de polluants.

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