Gas sensor
US12372494B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2021 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Mar 25, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0037
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas sensor includes a sensor element including an element body, a measurement pump cell being configured to pump out oxygen from surroundings of an inner measurement electrode to surroundings of an outer measurement electrode, and a measurement voltage detection sensor cell that detects a measurement voltage between a reference electrode and the inner measurement electrode, and a pump cell controller that executes a normal time measurement pump control process of pumping out oxygen in the measurement chamber during a normal operation time of the sensor element so that the measurement voltage reaches a normal time target value, and executes a start-up time measurement pump control process of pumping out oxygen in the measurement chamber at a start-up time of the sensor element earlier than the normal operation time so that the measurement voltage reaches a start-up time target value higher than the normal time target value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.