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:
Mar. 28, 2017
Filed:
Jun. 24, 2015
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Masahiro Yamashita, Komaki, JP;
Shoji Kitanoya, Kasugai, JP;
Masaya Watanabe, Komaki, JP;
Daisuke Ichikawa, Kani, JP;
Yusuke Matsukura, Nagoya, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A first bridge fixed resistor () of a combustible gas detection apparatus () is composed of a resistor element which is less likely to deteriorate as compared with a second bridge fixed resistor () and a variable resistor section (). The combustible gas detection apparatus () can judge a deteriorated state of at least one of the second bridge fixed resistor () and the variable resistor section () on the basis of the absolute value of a difference temperature ΔT which is the difference between a detection-time judgment temperature Tand a reference judgment temperature T. The combustible gas detection apparatus () obtains a corrected high-temperature-time voltage VH' and a corrected low-temperature-time voltage VL′ through use of a voltage error ΔV. Thus, a decrease in the accuracy in detecting the hydrogen concentration can be suppressed even when the resistance of the resistor section changes.