Pressure and temperature compensation algorithm for use with a piezo-resistive strain gauge type pressure sensor
US7483795B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2005 |
| Grant date | Jan 27, 2009 |
| Priority date | — |
| Expiry date | Jan 13, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/065
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of determining a temperature and a pressure in a tank is provided. The method comprises the steps of obtaining sensor data and calculating coefficients. Then, a bridge resistance is ratiometrically determined from a bridge voltage. A temperature is calculated with the coefficients and the bridge resistance. Thereafter, a transition from a temperature measurement mode to a pressure measurement mode is made. A voltage per resistance is calculated with the coefficients and a differential voltage. Then, a normalized voltage is calculated using the voltage per resistance, the differential voltage, and the bridge resistance to indirectly compensating for temperature. A pressure is calculated with the coefficients and the normalized voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.