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SELF-CALIBRATING PRESSURE SENSOR SYSTEM WITH PRESSURE SENSOR AND REFERENCE SENSOR THAT SHARE COMMON SEALED CHAMBER

  • US 20140298884A1
  • Filed: 12/09/2013
  • Published: 10/09/2014
  • Est. Priority Date: 04/04/2013
  • Status: Abandoned Application
First Claim
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1. A self-calibrating pressure sensor system for measuring the pressure of a gas or liquid comprising:

  • a pressure sensor that includes a pressure-sensing flexible diaphragm positioned such that one side is exposed to the gas or liquid and another side forms a wall of a sealed chamber;

    a reference sensor that includes a reference flexible diaphragm that has two sides that are both within or exposed to the sealed chamber; and

    a drift compensation system that;

    receives a signal from the pressure sensor and from the reference sensor;

    produces information that is indicative of the pressure of the gas or liquid based on the signal from the pressure sensor; and

    compensates for drift in the signal from the pressure sensor based on changes in the signal from the reference sensor.

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