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:
Jul. 17, 2018
Filed:
Jul. 28, 2015
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A gas detection apparatus () which includes a gas detection element () including a heat generation resistor (); an energization control section () which switches the energization state of the heat generation resistor to alternately assume one of two resistance values corresponding to one of two set temperatures set in advance; and a casing member () which accommodates the gas detection element and has a gas inlet opening (). The gas detection apparatus further includes a humidity computation section () which computes the humidity of the object atmosphere based on a ratio of a high-temperature-time voltage VH to a low-temperature-time voltage VL; and a clogging determination section () which determines the degree of clogging of the gas inlet opening based on a change in the humidity computed by the humidity computation section.