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:
Apr. 03, 2018
Filed:
Aug. 19, 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); G01V 3/10 (2006.01); H02J 5/00 (2016.01); H02J 50/10 (2016.01); H02J 50/60 (2016.01); H02J 17/00 (2006.01); H02J 7/02 (2016.01);
U.S. Cl.
CPC ...
G01V 3/10 (2013.01); H02J 5/005 (2013.01); H02J 7/025 (2013.01); H02J 17/00 (2013.01); H02J 50/10 (2016.02); H02J 50/60 (2016.02);
Abstract
A foreign object detector includes a detection coil; a transmitting circuit generating an unbalanced signal; a balanced-to-unbalanced transformer transforming the unbalanced signal supplied from the transmitting circuit to a balanced signal; and detection circuit detecting a foreign object by sensing a change in frequency characteristic of reflected power that is a power component reflected by the detection coil. The foreign object detector detects a foreign object while preventing a wire between the detection coil and the detection circuit from functioning as a linear antenna even if the wire is long.