Angle determining apparatus and angle determining system
US6969988B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 20, 2003 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Mar 20, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/24409
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An angle detection apparatus for detecting an angle of a rotatable magnetic field source comprises first and second magnetic sensor units for detecting first and second magnetic components of the magnetic field of the magnetic field source, driving means for driving the first and second magnetic sensor unit and control means. The control means control an output signal of the first magnetic sensor unit so as to have a fixed value and the driving means drive the second magnetic sensor unit according to the same drive conditions as those applied to the first magnetic sensor unit at the time when the first magnetic sensor unit is controlled by said control means so that an output signal of the second magnetic sensor unit is proportional to the tangent of said angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.