Providing nonlinear temperature compensation for sensing means by use of padé approximant function emulators
US7991571B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2008 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Jul 11, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D18/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Pade Approximant function emulators are used to model the nonlinear offset and/or nonlinear sensitivity behaviors of a sensor relative to temperature sub-ranges and to produce temperature compensating corrections for both offset and sensitivity as desired. In order to avoid use of brute force division for generating the Pade Approximant function signals, in one set of embodiments, feedback is used to provide a corresponding effect. In order to minimize the number of coefficients that are to be resolved and stored, in one set of embodiments, first or higher order Pade Approximants with normalized denominators are used so that each function can be defined with just three coefficients. Embodiments that are more analog in nature or more digital in nature are disclosed. Methods for resolving the Pade Approximant coefficients and calibrating each sensor unit on a mass production basis are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.