Magnetic encoder with double Frequency output
US6894486B2 · kind B2 · utility
5Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2003 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Sep 30, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/147
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic sensor has magnetically sensitive element located at a side surface, instead of the bottom surface, of a bias magnet, the magnet being located adjacent a magnetic target wheel, wherein the bias magnet is magnetized parallel to the direction of motion of the teeth/slots of the target wheel. The output may be of a single or double frequency. Sampling of output slope can provide information regarding direction of movement of the target wheel. In a second embodiment the bias magnet is magnetized perpendicular to the movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.