Field-modulating angular position measuring device having a scanning distance determinable in accordance with temperature and signal amplitudes
US7470890B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2006 |
| Grant date | Dec 30, 2008 |
| Priority date | — |
| Expiry date | Nov 9, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D2205/60
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A field-modulating angular position measuring device includes a scanning device, a measuring graduation, and evaluation electronics, the scanning device and the measuring graduation being arranged at a scanning distance rotatably relative to each other, and angle-dependent output signals being producible by the scanning device, which may be processed further in the evaluation electronics. The angular position measuring device furthermore has a unit for determining the signal amplitudes of the output signals. The angular position measuring device furthermore includes a temperature sensor, which is able to determine a temperature in the angular position measuring device. The angular position measuring device is configured such that the scanning distance may be determined on the basis of the temperature and the signal amplitudes. Furthermore, a method for operating such an angular position measuring device makes it possible, e.g., to determine a change in length of a shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.