Method for thermoelectric effect error correction
AssigneeRosemount Aerospace Inc.
InventorsBrandon T. Berg, Brian A. Gilkison
Life of this patent
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Abstract
Apparatus and associated methods relate to sensing pressure and mitigating the error introduced by the thermoelectric effect. A pressure sensing device includes a pressure sensor, a temperature sensor, and an error correction device. The pressure sensor produces a voltage output proportional to a sensed pressure. The temperature sensor measures a first temperature at a first location and a second temperature at a second location to produce a temperature difference signal. The error correction device modifies the pressure output proportionally to the temperature difference signal to produce a temperature adjusted pressure output which compensates for error introduced from the temperature difference.
Claims20
A pressure sensing system comprising:
- a pressure sensor configured to produce a pressure sensor voltage output proportional to a sensed pressure;
- a temperature sensor configured to measure a first temperature at a first location and a second temperature at a second location;
- wherein the temperature sensor is configured to produce a first temperature difference signal based on the first temperature and the second temperature;
- and
- one or more error correction components configured to modify the pressure sensor voltage proportionally to the first temperature difference signal.
A method for sensing pressure, the method comprising:
- measuring a pressure output using a pressure sensor, wherein the pressure sensor produces a pressure sensor voltage output proportional to a sensed pressure;
- measuring a first temperature at a first location and a second temperature at a second location using a temperature sensor;
- wherein the temperature sensor is configured to produce a first temperature difference signal;
- and
- modifying the pressure sensor voltage output proportionally to the first temperature difference signal using one or more error correction components.
Dependencies are inferred from the claim text.