Eddy current detection and compensation
US7783441B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2004 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Nov 3, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2034/2051
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A distortion compensation method includes determining an undisturbed phase for at least one of a first position indication signal and a second position indication signal. The method includes determining an undisturbed ratio that relates the amplitude of the first position indication signal at a first frequency to the amplitude of the second position indication signal at a second frequency. The method also includes determining a disturbed amplitude of the position indication signal and adjusting a position indication based on the disturbed amplitude and phase, the undisturbed amplitude ratio, and the undisturbed phase. The method further comprises determining a relationship between the eddy current phase of the first position indication signal and the second position indication signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.