Ultrasonic fuel gauging system using state machine control
AssigneeSimmonds Precision Products, Inc.
InventorChristian L. Trudeau
Life of this patent
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Abstract
Ultrasonic fuel gauging apparatus for a fuel tank having a plurality of ultrasonic fuel level sensors for sensing fuel levels at respective predetermined locations in a tank based on echo ranging; a memory means for storing sensor data; and a state device for interrogating each of the sensors by controlling the application of transmit pulses to each of the sensors and for receiving output signals corresponding to return echoes, the state device operating in response to a sequential state counter.
Claims10
An ultrasonic fuel gauging apparatus for a fuel tank, the apparatus comprising a plurality of ultrasonic fuel level sensors for sensing fuel levels at respective predetermined locations in a tank based on echo ranging;
- each sensor operating in response to one or more respective sensor control parameters;
- memory means for storing said sensor control parameters and sensor data;
- and a non-microprocessor controlled state device, interfaced with said sensors and said memory means, for interrogating each of said sensors by controlling the application of transmit pulses to each of said sensors and for receiving output signals corresponding to return echoes of said sensors;
- said state device controlling operation of said sensors in response to said sensor control parameters accessed by said state device from said memory means.
Dependencies are inferred from the claim text.