Method and apparatus for controlling a fluid operated actuator

G - Physics – 05 – D

Patent

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Details

G05D 3/12 (2006.01) G05D 3/20 (2006.01)

Patent

CA 2746138

A positioner (102) for controlling a fluid operated actuator (101) including a first fluid chamber (109) and a second fluid chamber (110) is provided. The positioner (102) comprises a first fluid conduit (105) coupled to the first fluid chamber (109). The positioner (102) also comprises a second fluid conduit (106) coupled to the second fluid chamber (110). A differential pressure controller (240) provided in the positioner (102) is adapted to control a fluid supply to the first and second fluid conduits (105, 106) based on a differential pressure between the first and second fluid chamber (109, 110).

La présente invention concerne un positionneur (102) destiné à commander un actionneur activé par un fluide (101), comprenant une première chambre de fluide (109) et une seconde chambre de fluide (110). Ledit positionneur (102) comprend une première conduite de fluide (105) raccordée à la première chambre de fluide (109). Ce positionneur (102) comprend également une seconde conduite de fluide (106) raccordée à la seconde chambre de fluide (110). Un organe de commande de pression différentielle (240) prévu dans le positionneur (102) est conçu pour commander une alimentation en fluide dans les première et seconde conduites de fluide (105, 106), sur la base d'une pression différentielle entre la première et la seconde chambre de fluide (109, 110).

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