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. 10, 2015
Filed:
Dec. 09, 2011
Applicants:
Junichi Abe, Tokyo, JP;
Shinji Sato, Tokyo, JP;
Tomoko Tanabe, Tokyo, JP;
Naoaki Inoue, Tokyo, JP;
Inventors:
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 31/02 (2006.01); H01H 31/12 (2006.01); G01R 31/327 (2006.01); H01H 33/26 (2006.01); H01H 33/59 (2006.01); G01R 31/12 (2006.01); H02B 13/065 (2006.01);
U.S. Cl.
CPC ...
G01R 31/327 (2013.01); H01H 33/26 (2013.01); H01H 33/59 (2013.01); G01R 31/1254 (2013.01); H02B 13/065 (2013.01);
Abstract
A discharge location determination unit includes: discharge detection circuits connected to metal electrodes, respectively, and to which a signal due to discharge is input; and a calculation circuit to which signals output from the discharge detection circuits are input, wherein, if the intensity difference or intensity ratio between the two output signals is within a predetermined value, the calculation circuit determines that the discharge location is inside a tank, otherwise the calculation circuit determines that the discharge location is outside the tank.