Gas concentration detection device
US10564120B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2015 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | Nov 9, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/416
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas concentration detection device includes a pump cell, a sensor cell, a monitor cell, a sensor current detection unit detecting a current outputted by the sensor cell, a monitor current detection unit detecting a current outputted by the monitor cell, a voltage adjustment unit adjusting a pump cell voltage applied to the pump cell, and a sensitivity determination unit determining a gas sensitivity of at least one of the sensor cell or the monitor cell. The voltage adjustment unit changes the pump cell voltage from a target voltage into a detection voltage where the concentration of the residual oxygen supplied to the sensor cell and the monitor cell is increased. The sensitivity determination unit determines the gas sensitivity based on a detection current detected by at least one of the sensor current detection unit or the monitor current detection unit in accordance with the concentration of the residual oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.