Position sensing apparatus and method
US7298137B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2003 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Oct 16, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2093
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is described an inductive position sensor in which a signal generator applies a excitation signal to an excitation winding formed on a first member, the excitation winding being electromagnetically coupled to at least two resonant circuits formed on a second member which are spaced from each other along a measurement path. The excitation windings are shaped so that the electromagnetic coupling between the exciting winding and each of the resonators varies along the measurement path. In this way, by applying an excitation signal to the excitation winding, respective different signals are induced in the resonators which depend upon the relative position of the first and second members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.