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:
May. 27, 2014
Filed:
Apr. 26, 2011
Atsushi Nonaka, Nishinomiya, JP;
Hisao Ohnishi, Osaka, JP;
Hidemasa Nonaka, Osaka, JP;
Toshiro Nakayama, Itami, JP;
Tomohiro Inoue, Hyogo, JP;
Yuki Kato, Mino, JP;
Atsushi Nonaka, Nishinomiya, JP;
Hisao Ohnishi, Osaka, JP;
Hidemasa Nonaka, Osaka, JP;
Toshiro Nakayama, Itami, JP;
Tomohiro Inoue, Hyogo, JP;
Yuki Kato, Mino, JP;
Osaka Gas Co., Ltd., Osaka, JP;
Figaro Engineering Inc., Osaka, JP;
Abstract
A method and apparatus for diagnosing an electrochemical sensor that detects the concentration of a gas are operative for diagnosing whether or not the sensor is in an error state due to a rise in a resistance in the electrolyte of the sensor. Such detection is made on the basis of a current flowing between a sensing electrode and an opposite electrode or a voltage corresponding to the current. A method for diagnosing an electrochemical sensor having a solid or liquid electrolyte between a sensing electrode and an opposite electrode detects the concentration of the gas to be detected on the basis of a current flowing between the sensing electrode and the opposite electrode, or a voltage corresponding to the current. Whether or not the electrochemical sensor is in an error state is diagnosed on the basis of a resistance of the electrolyte between the two electrodes of the electrolyte.