Fault detection in a thermal sensor device
US11946888B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2021 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Jun 16, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/007
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A thermal sensor device is configured to determine a fluid parameter of a fluid based on the heat transfer behavior of the fluid. The sensor device comprises one or more heaters and means for determining a response of the sensor device to heater power being supplied to the heaters. For detecting sensor faults, the sensor device is operated in two different modes of operation. First and second values (cstatic, cdynamic) of the same fluid parameter are determined in the two modes. A fault indicator value (F) is derived by comparing the first and second values. The first mode of operation may be a steady-state mode, the first value (cstatic) being based on a steady-state response of the sensor device to heater power being supplied to the heaters, and the second mode of operation may be a dynamic mode, the second value (cstatic) being based on a transient response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.