Device for detecting absolute angle of multiple rotation and angle detection method
US7772836B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2006 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Mar 19, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D2205/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multiple rotation absolute angle detecting device includes a reduction gear mechanism having an eccentric ring fitted to a rotatable member, an internally threaded member in a stationary member, an externally threaded member engageable with the internally threaded member, and a speed reducing member to which rotation is transmitted from the externally threaded member. The externally threaded member undergoes a speed-reduced rotation at a reduction gear ratio of 1/L (L represents an arbitrarily value exceeding 1) about an axis O′ of rotation of the eccentric ring and the speed reducing member rotates around the rotatable member at a speed equal to that of the externally threaded member. A multiple rotation detecting unit for outputting a sinusoidal or sawtooth wave having one period per rotation includes a to-be-detected member in the speed reducing member and a detecting member in the stationary member that confronts the to-be-detected member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.