Rotation angle detecting device
US7319320B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 29, 2005 |
| Grant date | Jan 15, 2008 |
| Priority date | — |
| Expiry date | Jan 5, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/145
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved rotation angle detecting device that detects a rotation angle of a first member relative to a second member is proposed. The rotation angle detecting device includes a magnet unit fixed to the first member and a pair of magnetic sensors fixed to the second member to provide output signals whose phase is different from each other at 90 degrees in angle. The magnet unit includes a pair of disk plates that has the same magnetic poles at the same circumferential positions and is disposed at a prescribed axial distance and a shaft that is made of magnetic material to support the disk plates at the center thereof. The magnetic unit provides a uniform magnetic field in a space around the shaft between the pair of disk plates, and a pair of magnetic sensors is disposed in the space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.