Foreign object detection
US10432036B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2017 |
| Grant date | Oct 1, 2019 |
| Priority date | — |
| Expiry date | Nov 10, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/402
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A set of initialization parameters are generated for a wireless charging device. Parameters of an antenna circuit connected to an output of the control circuit are measured. The antenna circuit is modelled as first and second virtual antenna portions. The presence of a foreign object is detected by receiving, from a receiver device, characteristics for the antenna circuit and by measuring second parameters of the antenna circuit. The measured second parameters and the initialization parameters are used to determine characteristics for the first virtual antenna portion. A foreign object is detected based upon a comparison of the received characteristics for the antenna circuit and the determined characteristics for the first virtual antenna portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.