Title:
HYBRID FOREIGN-OBJECT DETECTION AND POSITIONING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/055150
Kind Code:
A3
Abstract:
An apparatus is disclosed for a hybrid foreign-object detection and position system. In an example aspect, a foreign object detection (FOD) system of the base power-transfer system detects a passive beacon of an electric vehicle power- transfer system based on a beacon loop of the passive beacon overlapping an array of FOD sense loops effective to cause a change in impedance or admittance of one or more of the FOD sense loops. In aspects, the impedance reflects a modulation signal from the passive beacon. A position detection system integrated with the FOD system determines a passive beacon response in the input data based on the modulation frequency from the passive beacon. Then, a position of the beacon loop is determined relative to the array of FOD sense loops using a result of the passive beacon response canceled from input data.
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Inventors:
SIEBER LUKAS (US)
WIDMER HANS PETER (US)
DAETWYLER ANDREAS (US)
WIDMER HANS PETER (US)
DAETWYLER ANDREAS (US)
Application Number:
PCT/US2018/045043
Publication Date:
November 14, 2019
Filing Date:
August 02, 2018
Export Citation:
Assignee:
WITRICITY CORP (US)
International Classes:
G01V3/10; H02J5/00; H02J7/02
Foreign References:
| US20110053500A1 | 2011-03-03 | |||
| US20160318413A1 | 2016-11-03 | |||
| US20160187519A1 | 2016-06-30 | |||
| US20150255994A1 | 2015-09-10 | |||
| US20150109000A1 | 2015-04-23 |
Attorney, Agent or Firm:
COLBY, Michael K. et al. (US)
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