Devices and methods for a rotary encoder
US9863790B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2015 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Feb 3, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/24461
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An encoder is provided that comprises a disk to rotate about an axis. The encoder also comprises a first index mark and a second index mark on the disk. A first orientation of the disk associated with the first index mark is at an offset angle to a second orientation of the disk associated with the second index mark. The encoder also comprises a detector to provide an index signal responsive to an index mark being aligned with the detector. The device also comprises a controller to receive a first index signal and a second index signal from the detector, determine an angle of rotation of the disk between provision of the first index signal and provision of the second index signal, and identify a defect in the encoder based on the angle of rotation being different from the offset angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.