Rotation measuring mechanism, sheet conveyance apparatus, original reading apparatus, and image forming apparatus
US8478561B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2010 |
| Grant date | Jul 2, 2013 |
| Priority date | — |
| Expiry date | Sep 23, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00565
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rotation measuring mechanism capable of measuring a rotation amount and a displacement amount of a rotary member in a direction perpendicular to the rotation axis is provided. An exemplary combination of the rotation measuring mechanism includes a detection target rotating in synchrony with the rotary member and range sensors. Each time the detection target rotates once, each sensor outputs one cycle of a sine wave. The amplitude of the sine wave output from the sensor varies in accordance with the displacement of the detection target together with the rotary member in the direction perpendicular to the axis, thereby obtaining the rotation amount and the displacement amount of the rotary member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.