Optoelectronic angle of rotation sensor
US6552330B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 13, 2002 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Mar 13, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/34776
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optoelectronic sensor for sensing the angular position of a rotatable device includes an encoder disk and a sensor array. The disk has a coding operable to move along a movement direction in response to rotational device movement. The coding represents an optical oscillation structure extending transversely to the movement direction of the disk and having a frequency-related parameter which varies along the movement direction such that the parameter is indicative of angular position of the device. The array includes transducers for sensing the coding. The array is arranged transversely to the movement direction such that the transducers proportionally sense a respective portion of the coding at each angular device position. The transducers generate an intensity signal indicative of the parameter of a sensed portion of the coding at an angular device position. Based on the intensity signal, the angular device position is determined from the sensed coding portion parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.