Angle measuring instrument for a rotating shaft
US6828783B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2002 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Nov 15, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2053
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An angle measuring instrument having a device for determining a shaft angular position within one shaft rotation, and a device for determining a number of executed shaft rotations having a gear including at least one gear for converting the shaft rotary motion into rotary motion having a defined reduction ratio. The gear unit includes at least one gear wheel which rotates in a defined ratio to the shaft rotary motion. Devices are provided for generating sensor signals which are positionally dependent and are dependent upon the shaft rotations, in which the detecting device inductively scans reduced rotational movements of the shaft, and has alternating electrically conductive and electrically non-conductive graduation regions and a scanning device, movable relative to the graduation structure, including a device for generating a homogeneous electromagnetic field and a sensor device to scan the graduation structure and to transmit sensor signals which are dependent upon the shaft rotations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.