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Instrumentation and control circuit having multiple, dissimilar sources for supplying warnings, indications, and controls and an integrated cabin pressure control system valve incorporating the same

  • US 6,737,988 B2
  • Filed: 02/21/2002
  • Issued: 05/18/2004
  • Est. Priority Date: 02/21/2002
  • Status: Expired due to Term
First Claim
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1. 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.

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