Position encoder with scale calibration
US6686585B2 · kind B2 · utility
4Cited by
7References
48Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 19, 2001 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Jul 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/34707
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is provided a measurement system in which the calibration data is easily incorporated into or obtained by the position sensing and/or displacement sensing system's processing unit. A scale-based encoder has a signal processor that corrects for scale inaccuracy based on a limited set of correction coefficients. The correction coefficients are the slopes and offsets that define a piecewise linear correction curve corresponding to the errors inherent in the scale. Several ways for communicating the coefficients to the processor are envisioned. Correction is applicable to linear or rotary encoders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.