Compensated rotary position encoder
US4819051A · kind A · utility
11Cited by
1References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1987 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Jun 29, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/301
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An angular position encoder utilizes Moire fringes formed by illuminating regions of coded images arranged circumferentially on wheels rotatable in accordance with angles to be encoded. Movement of the Moire fringes from a reference position is detected and used to determine the angular movement. All non-rotating movements of the coded wheel are compensated by the encoding process and do not effect the output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.