Title:
ガス濃度検出装置
Document Type and Number:
Japanese Patent JP4093190
Kind Code:
B2
Abstract:
In a gas concentration detecting apparatus, a voltage is applied to electrodes of a sensor element. A change is caused in either the applied voltage or an element current. An amount of a change in each of a current value and a voltage value caused is measured in response to the caused change. An amount of resistance of the sensor element is calculated based on a ratio between the change amounts in the current value and the voltage value. A detection unit detects abnormality relating to controlling the sensor by utilizing at least one of the change amounts in the current value and the voltage value.
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Inventors:
Satoshi Haneda
Eiichi Kurokawa
Kawase Tomio
Eiichi Kurokawa
Kawase Tomio
Application Number:
JP2004039566A
Publication Date:
June 04, 2008
Filing Date:
February 17, 2004
Export Citation:
Assignee:
株式会社デンソー
International Classes:
G01N27/26; G01N27/409; G01N27/407; G01N27/41; G01N27/416; G01N27/417; G01N27/419
Domestic Patent References:
| JP2000121600A |
Attorney, Agent or Firm:
Tsuyoshi Yamada
Hirohiko Usui
Daito Kato
Takashi Ito
Hirohiko Usui
Daito Kato
Takashi Ito