Reduction of non-linearity errors in automotive pressure sensors
US10101230B2 · kind B2 · utility
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Key dates
| Filing date | Sep 16, 2015 |
| Grant date | Oct 16, 2018 |
| Priority date | — |
| Expiry date | May 16, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L27/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparatus for reduction of non-linearity errors in automotive pressure sensors. A pressure sensor includes a pressure sensing element including a pair of parallel electrodes, a pair of ceramic plates, rigid glass seals and a connection between the pair of parallel electrodes and an integrated circuit (IC). The IC executes a linear mapping function of a 1/CX value after a CX value is captured from the pressure sensing element, C representing a capacitance, the linear mapping function reducing a non-linearity error to enable two point calibration of a relationship between pressure and capacitance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.