System and method for cancelling the effects of stray magnetic fields from the output of a variable reluctance sensor
US6483293B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2000 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Sep 29, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/488
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor system for sensing a rotation of a sensing wheel is disclosed. The sensor system has a sensing coil in juxtaposition with the sensing wheel. Moreover, the sensing coil has a sensing coil output signal indicative of the rotational speed of the sensing wheel. Further, a cancellation coil is located remotely from the sensing coil and connected in series therewith. Additionally, the cancellation coil has a cancellation coil output signal indicative of an environmental disturbance which is effecting the sensing coil output signal. The cancellation coil output signal operates to cancel the effects of the environmental disturbance on the sensing coil output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.