Patent ID: 6737988
Filing Date: 2004-05-18
Classification: B64D,Y02T

Abstract:
An aircraft cabin pressure control valve, comprising:a valve body; a valve mounted in the valve body and moveable between a closed position and an open position; at least two controller circuits mounted on the valve body, each controller circuit operable to sense the cabin pressure and supply a valve actuation signal; and a valve actuator mounted on the valve body and operable, in response to one or more of the valve actuation signals, to position the valve to a predetermined position, wherein each of the controller circuits includes: a first pressure sensor operable to sense aircraft cabin pressure and supply a first pressure signal representative thereof, a second pressure sensor dissimilar from the first pressure sensor and operable to sense aircraft cabin pressure and supply a second pressure signal representative thereof, a digital signal conditioning circuit coupled to receive the first pressure signal and operable, in response thereto, to supply a digital pressure signal, an analog signal conditioning circuit coupled to receive the second pressure signal and operable, in response thereto, to supply an analog pressure signal, and a processor coupled to receive the analog pressure signal and the digital pressure signal and operable, in response thereto, to supply (i) a signal in a first data transmission format that is representative of cabin pressure altitude and (ii) the valve actuation signal.