Test unit for aircraft fuel gaging system

Details Test unit for aircraft fuel gaging system Test unit for aircraft fuel gaging system

1981-11-13

1984-04-03

Krass, Errol A.

Boots, shoes, and leggings

73 1H, 364509, 364803, G06G 750

Patent

active

044411570

ABSTRACT:
The invention relates to a test unit for testing the operation and accuracy of a microcomputer controlled aircraft fuel gaging system or processor which involves a characterized liquid gaging system sensor and sensor apparatus for determining a depth of liquid in a tank at a particular location in the tank. The fuel gaging system sensor is the wetted length type capacitance probe. The test unit hereof performs tests on processors prior to their being installed in aircraft and operates to provide a real time simulation of capacitive probes which in effect replaces the aircraft tank and probes thereof in testing the processors. A single reference capacitor simulates by multiplexing the capacitances of the set of tank probes, which in operation are scanned in succession by the processor, to verify the proper operation of the processor. The simulation provides a static fuel level from zero to one hundred percent and in addition a dynamic fuel level may be represented wherein the fuel is being loaded into or out of the tank.

REFERENCES:
patent: 4258422 (1981-03-01), Dougherty et al.
patent: 4301512 (1981-11-01), Keith et al.
patent: 4337638 (1982-07-01), Leonard et al.

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