Digital densitometer and fuel gauging system
AssigneeEaton Corporation
InventorsPhillip Andrew Bahorich, Nalin Joshi
Life of this patent
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Abstract
A digital densitometer for a fluid gauging system includes a frequency detection device configured to be disposed within a fluid tank, wherein a frequency detected by the frequency detection device is indicative of a density of a fluid within the fluid tank, frequency detection circuitry configured to obtain the frequency from the frequency detection device and output the frequency in a digital form, and an interface for digital communication with an electronic controller, the digital communication comprising transmission of the digital form of the frequency for the electronic controller.
Claims19
A digital densitometer for a fluid gauging system, the densitometer comprising:
- a frequency detection device configured to be disposed within a fluid tank, wherein a frequency detected by the frequency detection device is indicative of a density of a fluid within the fluid tank;
- frequency detection circuitry configured to be disposed within the fluid tank and to obtain the frequency from the frequency detection device and to output the frequency in a digital form;
- a data bus having a temperature sensor integrated with a frequency counter is configured to count pulses of an analog signal with reference to a clock and determine a frequency of the frequency detection device, wherein the frequency detection circuitry is in communication with one or more additional components over the data bus, and the frequency detection circuitry is associated with a unique address on the data bus;
- and
- an interface for digital communication with an electronic controller, the digital communication comprising transmission of the digital form of the frequency for the electronic controller, calibration parameters of the frequency detection device, and a temperature from the temperature sensor.
A hybrid digital densitometer for a fluid gauging system, the densitometer comprising:
- a frequency detection device disposed within a fluid tank, wherein a frequency detected by the frequency detection device is indicative of a density of a fluid within the fluid tank;
- a computer-readable memory configured to store a density calibration coefficient respective of the frequency detection device;
- an interface for communication with an electronic controller over a data bus having a temperature sensor integrated with a frequency counter is configured to count pulses of an analog signal with reference to a clock and determine a frequency of the frequency detection device, wherein the memory is associated with a unique address on the data bus, the communication comprising the density calibration coefficient and the frequency;
- and
- a switch configured to selectively electrically couple the interface via the data bus with the frequency detection device or with the computer-readable memory.
A digital densitometer system, comprising:
- a frequency detection device disposed within a fluid tank, wherein a frequency detected by the frequency detection device is indicative of a density of a fluid within the fluid tank;
- frequency detection circuitry configured to obtain the frequency from the frequency detection device output the frequency in a digital form;
- an electronic controller, disposed outside of the fluid tank, configured to receive the frequency and to determine a density of fluid within the fluid tank according to the frequency;
- and
- a data bus having a temperature sensor integrated with a frequency counter is configured to count pulses of an analog signal with reference to a clock and determine a frequency of the frequency detection device, wherein the frequency detection circuitry is in communication with one or more additional components over the data bus, and the frequency detection circuitry is associated with a unique address on the data bus.
Dependencies are inferred from the claim text.