Patent ID: 6745982
Filing Date: 2004-06-08
Classification: B64C,B64D

Abstract:
A system for monitoring interior pressure change in an aircraft having a bulkhead separating a flight deck portion of the aircraft from a cabin portion of the aircraft, the bulkhead including a door and a latch, the system comprising:a first pressure sensor that provides flight deck pressure signals corresponding to a rate of change of an ambient pressure in the flight deck portion of the aircraft and includes: a first absolute pressure transducer; a first filter stage coupled to filter the output of the absolute pressure transducer; and a differentiator stage coupled to receive the filtered output of the absolute pressure transducer via the filter and to provide the signals corresponding to the rate of change of the ambient pressure in the flight deck portion of the aircraft; and a first comparator responsive to the flight deck pressure signals to provide a first actuation signal in response to a comparison of the rate of change of the ambient pressure in the flight deck portion to at least a first minimum reference level.