Sensor fault detector
US4845435A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 20, 1988 |
| Grant date | Jul 4, 1989 |
| Priority date | — |
| Expiry date | Jan 20, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor fault detector for detecting a missing or shorted environment condition sensor of a plurality of sensors includes a sensor circuit for supplying a concurrent output signal from each sensor, a reference voltage circuit for supplying a predetermined reference voltage, a plurality of comparators, each of the comparators concurrently comparing a repective one of the output signals with the reference signal to produce a corresponding comparator output signal representative of a predetermined relationship between the compared signals assure the presence of properly working and connected sensors and a monitoring circuit responsive to the concurrent effect of output signals from all of the comparators to produce a control signal representative of a concurrent properly working and connected state of all of the sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.