Measurement apparatus
US7966158B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 2008 |
| Grant date | Jun 21, 2011 |
| Priority date | — |
| Expiry date | Mar 1, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D3/028
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The measurement apparatus includes a distortion correcting unit configured to generate a plurality of correction signals by correcting the plurality of signals using a distortion coefficient which is stored in the apparatus, a square-root of sum of squares arithmetic unit configured to calculate a square-root of sum of squares of the plurality of correction signals, a first normalizing unit configured to generate a plurality of first normalized signals by dividing each of the plurality of correction signals by the square-root of sum of squares, and a phase arithmetic unit configured to calculate the position of the object based on the plurality of first normalized signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.