Directional speed sensing systems and methods
US8427135B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2009 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Feb 12, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A directional speed sensor comprises first and second Hall-effect modules. The first Hall-effect module outputs a first current pulse for a first predetermined period when a tooth of a toothed wheel that rotates with a shaft of the vehicle passes the first Hall-effect module in a first rotation direction and outputs the first current pulse for a second predetermined period when the tooth passes the first Hall-effect module in a second rotational direction. The second Hall-effect module is electrically connected in parallel with the first Hall-effect module, is angularly offset from the first Hall-effect module with respect to a center of the shaft, outputs a second current pulse for the first predetermined period when the tooth of the toothed wheel passes the second-Hall-effect module in the first direction, and outputs the second pulse for the second predetermined period when the tooth passes the second Hall-effect module in the second direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.