Accession Number : ADD012798
Title : Electronically Compensated Pressure Dilution Demand Regulator.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC
Personal Author(s) : Beale,Robert B
Report Date : 10 Mar 1987
Pagination or Media Count : 5
Abstract : This patent relates to a dilution control oxygen regulator for providing a desired oxygen concentration at different altitudes and pressures. Two valves supply oxygen and air to a recipient's mask. A pressure which is compared with a prescribed pressure command signal for a particular altitude to produce a pressure error. The error signal is compensated by a proportional-plus-integral controller, and is biased between the two gas valves proportional to an oxygen concentration schedule which prescribes a desired oxygen concentration percentage based on altitude. The biased and compensated error signal is used as valve opening displacement commands for establishing desired valve opening areas. A feedback loop around the electromechanical valve actuator means improves the stability and accuracy of valve settings.
Descriptors : *PATENTS, *PRESSURE REGULATORS, *PNEUMATIC VALVES, *DILUTION, *OXYGEN EQUIPMENT, CONCENTRATION(COMPOSITION)
Subject Categories : Life Support Systems
Hydraulic and Pneumatic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE