Gas detecting device with self-diagnosis for electrochemical gas sensor
US7090755B2 · kind B2 · utility
4Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2005 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Apr 4, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4175
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A test signal is applied in parallel with an electrochemical gas sensor for about ten seconds, while an amplifying circuit is turned off. After turning off the test signal, the amplifying circuit is turned on. If the gas sensor outputs an waveform of a predetermined shape in a predetermined period after the turning-on, the gas sensor will be judged to be normal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.