Systems, methods, and apparatus for detection of metal objects in a predetermined space
US9410823B2 · kind B2 · utility
34Cited by
11References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2013 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Jul 17, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S30/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This disclosure provides systems, methods and apparatus for detecting foreign objects. In one aspect an apparatus for detecting a presence of an object in a magnetic field is provided. The apparatus includes a power circuit configured to generate the magnetic field and transfer power wirelessly at a level sufficient to power or charge a load via the magnetic field. The apparatus further includes a detection circuit configured to transmit signals and detect, based on a reflection of the transmitted signals, a frequency of vibration of the object caused by the magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.