Method and apparatus for detecting object orientation and position
US7970477B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2007 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Feb 26, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36003
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A signal transmitting and receiving system to track the position and orientation of limb segments in order to provide feedback information for the control of the limb movement. The user will generally be seated in a wheelchair that provides a structure upon which orthogonal and/or non-orthogonally oriented coils can be mounted and energized selectively so as to create variously oriented magnetic fields. Multiple wireless sensors injected into the limb detect the local field strength and send information telemetrically to a central controller. The controller extracts information about the position and orientation of each limb segment by combining signals from various sensors according to calibration information and optimal filtering methods for extracting information from multiple nonlinear sensors in mechanically constrained systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.