초록 ▼

A true mass fuel gaging system for aircraft utilizing multiplexing of tank unit measurements in or adjacent a fuel tank for improved accuracy and fault isolation. The system provides dual equipment channels for redundancy throughout all data processing portions of the system and also uses extensive

A true mass fuel gaging system for aircraft utilizing multiplexing of tank unit measurements in or adjacent a fuel tank for improved accuracy and fault isolation. The system provides dual equipment channels for redundancy throughout all data processing portions of the system and also uses extensive built-in testing (BIT) routines so that upon detection of a fault an alternative channel can be switched into use. Detected fault locations are displayed in the cockpit with the fuel quantity displays. The system also provides displays of center of gravity measurements derived from fuel mass and location.

대표청구항 ▼

A multiplexed junction probe fuel gaging system for aircraft having at least one fuel tank with multiple fuel sensing units comprising: a plurality of individual elements mounted wihtin a tank for sensing fuel and providing signals corresponding to fuel measurement; signal processing apparatus on bo

A multiplexed junction probe fuel gaging system for aircraft having at least one fuel tank with multiple fuel sensing units comprising: a plurality of individual elements mounted wihtin a tank for sensing fuel and providing signals corresponding to fuel measurement; signal processing apparatus on board the aricraft 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 individually measuring said plurality of elements in a predetermined sequence and forming a data stream of analog signals corresponding to the sequence of signals from said elements for transmission to the signal processing apparatus over said common signal path, said data stream containing information separately representative of each individual element for processing in said signal processing apparatus to determine the fuel measurement at each individual element which is measured.