This application belongs to the technical field of aircraft
oxygen /
life support system design. It is a method for displaying the remaining
oxygen supply time of an aircraft. It receives the
temperature and pressure information uploaded by the
oxygen source
pressure sensor, calculates the oxygen compression factors at the original pressure and temperature of two groups of high-pressure oxygen cylinders respectively, then calculates the oxygen compression factor under
normal conditions, and then calculates the corrected pressures of the two groups of high-pressure oxygen cylinders according to the oxygen compression factor under
normal conditions. It calculates the remaining
oxygen supply flow according to the corrected oxygen source pressure and the low-pressure warning pressure of the oxygen source, obtains the cabin temperature and cabin pressure sent by the aircraft
environmental control system, then calculates the inspiratory volume of each
crew member under NTPD conditions according to the inspiratory volume of each
crew member under BTPS conditions, obtains the total volume of the two groups of high-pressure oxygen cylinders, and calculates the remaining
oxygen supply time according to the inspiratory volume of each
crew member under NTPD conditions, the number of crew members and each correction coefficient. The calculation time is short and the calculation is accurate, which is convenient for the crew to check.