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:
Jun. 16, 2015
Filed:
Aug. 16, 2011
Applicant:
Masahisa Niwa, Osaka, JP;
Inventor:
Masahisa Niwa, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 27/28 (2006.01); H03K 17/945 (2006.01); H03K 17/95 (2006.01);
U.S. Cl.
CPC ...
H03K 17/945 (2013.01); H03K 17/9542 (2013.01);
Abstract
A detection device includes a resonance unit having a coil and a capacitor, an oscillation unit for oscillating the resonance unit, and a signal processing unit for detecting the oscillation state of the resonance unit and outputting an object detection signal when oscillation is stopped. The signal processing unit intermittently executes a self-diagnosis mode by forcibly oscillating the oscillation unit to determine whether or not an abnormality occurs in the resonance unit.