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Multiplexed junction probe for fuel gaging system and system containing same

  • US 4,918,619 A
  • Filed: 12/20/1984
  • Issued: 04/17/1990
  • Est. Priority Date: 12/20/1984
  • Status: Expired due to Term
First Claim
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1. A multiplexed junction probe fuel gaging system for aircraft having at least one fuel tank with multiple fuel sensing units comprising:

  • a plurality of elements mounted within a tank for sensing fuel and providing signals corresponding to fuel measurement;

    signal processing apparatus on board the aircraft for converting analog data signals to digital values corresponding to measured fuel quantity;

    a junction probe installed in a tank and including circuitry separately coupled to the individual tank mounted elements, the junction probe also being coupled to the signal processing apparatus by a common signal path;

    first circuit means included in the junction probe for electrically driving said elements; and

    second circuit means in the junction probe for measuring each element in a predetermined sequence and forming a data stream of analog signals corresponding to the signals from said elements for transmission to the signal processing apparatus over said common signal path.

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