Title:
GAS SENSOR AND METHOD FOR CONTROLLING GAS SENSOR
Document Type and Number:
WIPO Patent Application WO/2024/057699
Kind Code:
A1
Abstract:
The present invention makes it possible to accurately measure a low-concentration gas to be measured. Provided are a gas sensor 100 and a method for controlling the same, the gas sensor 100 comprising a sensor element 101 and a control device. The sensor element 101 includes: a substrate part 102; a measured gas distribution cavity 15; an oxygen pump cell 21 including an intra-cavity oxygen pump electrode 22 and an extra-cavity oxygen pump electrode 23; a decomposition pump cell 50 including an intra-cavity decomposition pump electrode 51 and an extra-cavity decomposition pump electrode 23; an intra-cavity detection electrode 44; and a reference electrode 42 provided to be in contact with a reference gas. The control device includes: a pump control unit that operates the decomposition pump cell 50 so that the voltage between the intra-cavity detection electrode 44 and the reference electrode 42 is a predetermined value, to decompose at least a portion of a gas to be measured in gases being measured, and to pump out oxygen generated through the decomposition; and a concentration calculation unit that calculates the concentration of the gas to be measured in the gases being measured on the basis of the value of the voltage between the intra-cavity decomposition pump electrode 51 and the reference electrode 42.
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Inventors:
WATANABE YUSUKE (JP)
ICHIKAWA DAICHI (JP)
ICHIKAWA DAICHI (JP)
Application Number:
PCT/JP2023/025907
Publication Date:
March 21, 2024
Filing Date:
July 13, 2023
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
International Classes:
G01N27/416
Foreign References:
| JP2016138775A | 2016-08-04 | |||
| JP2016142575A | 2016-08-08 | |||
| JP2015031604A | 2015-02-16 | |||
| JP2022091669A | 2022-06-21 | |||
| JP2020126051A | 2020-08-20 | |||
| JP2019219175A | 2019-12-26 | |||
| JP2018173319A | 2018-11-08 | |||
| JP2021162580A | 2021-10-11 | |||
| JP2022153277A | 2022-10-12 |
Attorney, Agent or Firm:
OKADA, Masahiro et al. (JP)
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