Digital opto-electric pulse application method for correcting bit error of vernier-type optical encoder
US9372100B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 25, 2013 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Jul 1, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This disclosure relates to a method for detecting an absolute rotation angle of an optical rotary encoder, and more particularly, to an optical encoder having a signal track for generating a digital pulse which may correct an error when a high-level bit is generated in a Vernier type. The optical encoder according to an embodiment of the present disclosure includes a master track for generating a sinusoidal signal with the fastest cycle, a Vernier track for generating a sinusoidal signal with a cycle smaller than that of the master track by a predetermined value, and a digital track for generating a digital pulse signal with a cycle proportional to the cycle of the sinusoidal signal of the master track.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.