Method and system for determining position of a body
US6747462B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2002 |
| Grant date | Jun 8, 2004 |
| Priority date | — |
| Expiry date | Jul 3, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2415
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining the position of a rotor with respect to a stator. The method includes generating offset N and Q signals when the rotor moves with respect to the stator and sampling the N and Q signals at a predetermined time interval. A section of a polar plot in which the N and Q signal sample lies is determined and compared to the section of a polar plot in which a previous N and Q signal sample lies. A long range rotor position is calculated by maintaining a count of the change of sections from previous N and Q signal samples. A sub-section rotor position for the N and Q signal sample is calculated and combined with the long range rotor position to create a linear position signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.