Title:
GAS SENSOR
Document Type and Number:
WIPO Patent Application WO/2022/123865
Kind Code:
A1
Abstract:
This gas sensor 101 is provided with a sensor element 101 and a control device. During normal driving of the sensor element 101, the control device performs a normality measurement pump control process of controlling a measurement pump cell 41 so that the voltage V2 reaches a normality target value, and pumping out oxygen in a third inner void 61. At the time of startup of the sensor element 101 before the normal driving, the control device performs a startup measurement pump control process of controlling the measurement pump cell 41 so that the voltage V2 reaches a startup target value higher than the normality target value, and pumping out oxygen in the third inner void 61. Upon determining that the oxygen concentration in the third inner void 61 has become stable on the basis of the operation of the measurement pump cell 41, the control device makes a switch from the startup measurement pump control process to the normality measurement pump control process. The control device detects the concentration of a specific gas in a gas subject to measurement, on the basis of a pump current Ip2 flowing through the measurement pump cell 41 due to the normality measurement pump control process.
Inventors:
OKAMOTO TAKU (JP)
YOSHIDA SOICHIRO (JP)
HASHIKAWA RYO (JP)
YOSHIDA SOICHIRO (JP)
HASHIKAWA RYO (JP)
Application Number:
PCT/JP2021/035842
Publication Date:
June 16, 2022
Filing Date:
September 29, 2021
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
International Classes:
G01N27/416
Foreign References:
| JP2020101493A | 2020-07-02 | |||
| JP2020159881A | 2020-10-01 | |||
| JP2019158816A | 2019-09-19 | |||
| JP2016166871A | 2016-09-15 | |||
| JP2011137806A | 2011-07-14 | |||
| JP2001281211A | 2001-10-10 | |||
| JP2020134297A | 2020-08-31 |
Attorney, Agent or Firm:
ITEC INTERNATIONAL PATENT FIRM (JP)
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