Method of diagnosing the rationality of a humidity sensor output signal
US9224252B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2014 |
| Grant date | Dec 29, 2015 |
| Priority date | — |
| Expiry date | Jul 23, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C5/0808
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of diagnosing rationality of a humidity sensor output signal determines that the humidity sensor output signal has passed a rationality diagnostic if the output signal is changing sufficiently. If the output signal is not changing sufficiently, the method determines whether it should be changing sufficiently by whether a humidity capacity index determined based on temperature and pressure local to the humidity sensor is changing sufficiently. If the humidity capacity index is changing sufficiently and the humidity sensor output signal is not, the method determines that the humidity sensor output signal has failed a diagnostic check. Upon determining that the humidity sensor output signal has failed the diagnostic check a predetermined number of times, the method determines that the humidity sensor output signal has failed the rationality diagnostic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.