Invention Grant
- Patent Title: Hybrid foreign-object detection and positioning system
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Application No.: US16052445Application Date: 2018-08-01
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Publication No.: US10944300B2Publication Date: 2021-03-09
- Inventor: Lukas Sieber , Hans Peter Widmer , Andreas Daetwyler
- Applicant: WiTricity Corporation
- Applicant Address: US MA Watertown
- Assignee: WiTricity Corporation
- Current Assignee: WiTricity Corporation
- Current Assignee Address: US MA Watertown
- Agency: Colby Nipper PLLC
- Main IPC: H02J50/60
- IPC: H02J50/60 ; H02J50/90 ; H02J50/10 ; G01V3/10 ; B60L53/12 ; H02J7/02

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.
Public/Granted literature
- US20190089206A1 Hybrid Foreign-Object Detection and Positioning System Public/Granted day:2019-03-21
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