METHOD AND SYSTEM TO COMPENSATE FOR TEMPERATURE AND PRESSURE IN PIEZO RESISTIVE DEVICES
First Claim
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1. A method of calibrating a piezo resistive device, comprising:
- providing a piezo resistive element having a fluctuating resistivity in the piezo resistive device;
receiving, by a processor connected to the piezo resistive element, signals representative of the temperature and pressure readings of the piezo resistive element;
calculating, by the processor, a first temperature as a function of the signal representative of the temperature reading of the piezo resistive device;
calculating, by the processor, an actual pressure as a function of the first temperature and the signal representative of the pressure reading of the piezo resistive device; and
calculating, by the processor, an actual temperature as a function of the first temperature and the actual pressure times a constant (k).
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Abstract
A method and system to calibrate temperature and pressure in piezo resistive devices for non-linear sensors having two variables, where a piezo resistive device such as a piezo resistive transducer (PRT) used for example in a pressure sensor system is calibrated to calculate actual/ambient temperature and pressure even though the PRT impedance is unbalanced relative to pressure.
10 Citations
10 Claims
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1. A method of calibrating a piezo resistive device, comprising:
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providing a piezo resistive element having a fluctuating resistivity in the piezo resistive device; receiving, by a processor connected to the piezo resistive element, signals representative of the temperature and pressure readings of the piezo resistive element; calculating, by the processor, a first temperature as a function of the signal representative of the temperature reading of the piezo resistive device; calculating, by the processor, an actual pressure as a function of the first temperature and the signal representative of the pressure reading of the piezo resistive device; and calculating, by the processor, an actual temperature as a function of the first temperature and the actual pressure times a constant (k). - View Dependent Claims (4, 5, 6, 7, 8, 9)
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2. (canceled)
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3. (canceled)
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10-20. -20. (canceled)
Specification