Rotation detection device
US10302461B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 2016 |
| Grant date | May 28, 2019 |
| Priority date | — |
| Expiry date | Feb 25, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D2205/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
To provide a rotation detection device that has a miniaturized sensor IC in comparison with a prior art.A rotation detection device includes: a magnet that forms a magnetic field toward a tooth surface of a gear; and a sensor disposed between the magnet and the gear, the sensor including: at least a pair of magnetic detection elements x1 and x2 that outputs signals according to a magnetic flux density in a radial direction of the gear; and a magnetic concentrator that induces, in the radial direction of the gear, a component in a circumferential direction of the gear in the magnetic flux density on detection surfaces of the magnetic detection elements x1 and x2, the sensor detecting a variation in a magnetic flux density accompanying the rotation of the gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.