The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 28, 2017
Filed:
Aug. 18, 2015
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventor:
Norihiro Miyashita, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02J 7/00 (2006.01); H02J 7/02 (2016.01); H01P 5/18 (2006.01); H01F 27/28 (2006.01); H01F 38/14 (2006.01); H02J 5/00 (2016.01); G01V 3/10 (2006.01); H02J 17/00 (2006.01);
U.S. Cl.
CPC ...
H02J 7/025 (2013.01); G01V 3/10 (2013.01); H01F 27/28 (2013.01); H01F 38/14 (2013.01); H01P 5/18 (2013.01); H02J 5/005 (2013.01); H02J 17/00 (2013.01);
Abstract
Disclosed herein is a foreign object detector to detect a foreign object while distinguishing metal from water. The foreign object detector includes a detection coil; a transmitting circuit generating RF power of a predetermined frequency; a directional coupler outputting the RF power supplied from the transmitting circuit to the detection coil, and extracting reflected power that is a power component reflected by the detection coil; and a detection circuit receiving the reflected power extracted by the directional coupler, and detecting the foreign object by sensing a change in the frequency characteristic of the reflected power.