Rotational velocity and direction sensing system
US6498474B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 2001 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Jun 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rotational sensor system for detecting rotational velocity and rotational direction of a rotating member, such as a vehicle axle, including a tone ring mounted to the rotating member. The system includes a pair of active sensors mounted adjacent to the tone ring and spaced from one another, which, when activated, produce an electric signal in response to movements in the tone wheel. A processor receives the electric signals from the sensors and generates a signal indicative of rotational velocity and rotational direction of the rotating member. Also, preferably, an output signal is created that uses square waves with different amplitude levels for the signal highs and lows depending upon the direction of rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.