Gas sensor
US12372493B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2022 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Oct 21, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/419
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas sensor includes a sensor element and a pump cell controller. The pump cell controller performs a normal time control process after a heater control process is started, the normal time control process including a main pump control process, an auxiliary pump control process of controlling an auxiliary pump cell so that a voltage for auxiliary pump reaches a target value, and a normal time measurement pump control process of pumping out oxygen in a measurement chamber by controlling the measurement pump cell so that a measurement voltage reaches a normal time target value. In an early stage of the normal time control process, the pump cell controller performs a correction process of correcting the target value of the voltage for auxiliary pump to a value higher than a target value in a period after the early stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.