Digital positioning systems having high accuracy
US4429267A · kind A · utility
40Cited by
4References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1981 |
| Grant date | Jan 31, 1984 |
| Priority date | — |
| Expiry date | Jun 22, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/37296
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A digital positioning system having high accuracy is disclosed, which employs an incremental position optical encoder as the position transducer. In response to the output signal from the encoder, the system provides coarse and fine position signals which are combined to form a composite digital signal representing the absolute position of a moveable control member. The composite position signal has a resolution of greater than one part in one million. Trigonometric conversion techniques are used to derive high resolution incremental position information from the encoder output signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.