Invention Grant
- Patent Title: Method and apparatus for diagnosing electrochemical sensor
- Patent Title (中): 电化学传感器诊断方法和装置
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Application No.: US13094374Application Date: 2011-04-26
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Publication No.: US08736274B2Publication Date: 2014-05-27
- Inventor: Atsushi Nonaka , Hisao Ohnishi , Hidemasa Nonaka , Toshiro Nakayama , Tomohiro Inoue , Yuki Kato
- Applicant: Atsushi Nonaka , Hisao Ohnishi , Hidemasa Nonaka , Toshiro Nakayama , Tomohiro Inoue , Yuki Kato
- Applicant Address: JP Osaka JP Osaka
- Assignee: Osaka Gas Co., Ltd.,Figaro Engineering Inc.
- Current Assignee: Osaka Gas Co., Ltd.,Figaro Engineering Inc.
- Current Assignee Address: JP Osaka JP Osaka
- Agency: The Webb Law Firm
- Main IPC: G01R31/08
- IPC: G01R31/08 ; G01R27/08

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.
Public/Granted literature
- US20120274337A1 Method and Apparatus for Diagnosing Electrochemical Sensor Public/Granted day:2012-11-01
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