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. 30, 2013
Filed:
Jan. 09, 2009
Hideaki Emoto, Tokyo, JP;
Hideaki Emoto, Tokyo, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A signal status diagnosing device of an external control unit, including an insulation transformer having a primary side, a secondary side and an intermediate tap at a midpoint of the primary winding, the secondary side is connected the external control unit. The device further includes a signal generating unit for generating a periodically vibrating voltage which is connected to the primary side of the insulation transformer, a switch circuit which is connected to the intermediate tap of the primary winding of the insulation transformer, the switch circuit has a switch and a resistance being connected to the intermediate tap in parallel with each other, and a current measuring unit connected to the switch circuit and configured to measure a first current which flows in the switch or the resistance to diagnose signal status of the external control unit.