Method of detecting abnormality in input and output units
US4618954A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1984 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | May 29, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C5/0808
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of detecting abnormalities through fault diagnosis applied to at least one input unit or output unit by an electronic control unit to which the input unit or output unit is connected. The method comprises the steps of subjecting the input unit or output unit to fault diagnosis, storing information, which is indicative of abnormality, in a first storage area of the electronic control unit when the abnormality is detected as the result of the diagnosis, storing information, which is indicative of the abnormality, in a second storage area of the electronic control unit when the abnormality is detected as the result of subjecting the input or output unit to fault diagnosis again, and rendering a decision to the effect that the input unit or output unit which has undergone the fault detection operation is abnormal when it is determined that the contents stored in the first and second storage areas are identical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.