Measuring device with two-channel sampling
US8239161B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2009 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Apr 26, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a shaft encoder device, comprising magnetic sensor means designed to detect the magnetic field of a magnetic field generating means stationary with respect to the shaft, a light source, optical sensor means designed to detect light emitted from the light source and reflected or transmitted by an encoder disk stationary with respect to the shaft, and signal processing means designed to receive first data from the magnetic sensor means and second data from the optical sensor means, and to determine an angle of rotation of the shaft from the received first data and/or to determine the angle of rotation of the shaft from the received second data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.