Interpolation device for scale arrangement
US5485407A · kind A · utility
10Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1993 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Nov 16, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2448
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An interpolation device for a scale arrangement receives sine wave and cosine wave signals indicative of a measuring data from the scale arrangement and calculates a DC offset value, an amplitude coefficient and an amount of a phase drift on the basis of the received signals. The interpolation device outputs a correct angle signal upon removing a DC offset, a gain level error, a gain unbalance and a phase drift from received signals. Therefore, the interpolation device realizes a mechanical structure of the scale arrangement to be simple.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.