PRESSURE CONTROL SYSTEM WITH OPTIMIZED PERFORMANCE

• Main Authors: LUCAS, PAUL, CHAMBERLAIN, DAVE, DAVIDKOVICH, VLADISLAV, HILL, GORDON
• Format: Patent
• Language: English; French
• Published: 27.09.2007
• Subjects: ACTUATING-FLOATS; BLASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COCKS; CONTROLLING; DEVICES FOR VENTING OR AERATING; DIFFUSION TREATMENT OF METALLIC MATERIAL; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; PHYSICS; REGULATING; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

A pressure control system for controlling pressure of a fluid in a chamber (105) includes a pressure sensor (110) configured to measure the pressure of the fluid in the chamber, and a valve (120) configured to control the pressure of the fluid in the chamber by regulating flow of the fluid from the chamber. The pressure control system further includes a controller (140). The controller is configured to estimate the volume of the chamber, and to generate a pump speed curve of the valve. The controller is further configured to monitor and modify the pump speed curve so as to maintain a slope of the pump speed curve to at least a minimum value, and to use the modified pump speed curve to adjust the position of the valve in response to pressure measurements by the pressure sensor, so as to maintain the pressure in the chamber at a desired pressure setpoint. L'invention porte sur un système de stabilisation de la pression d'un fluide contenu dans une chambre (105), comprenant: un manomètre (110); une soupape régulant le débit du fluide (120) sortant de la chambre; et un régulateur (140) estimant le volume de la chambre et élaborant la courbe de vitesse de la pompe de la soupape. Le régulateur est en outre conçu: pour suivre et modifier la courbe de vitesse de la pompe pour en maintenir la pente à au moins une valeur minimale, et pour utiliser la courbe ainsi modifiée pour régler la position de la soupape en fonction des mesures de pression du manomètre, et maintenir ainsi la pression de la chambre à la valeur de consigne voulue.