Method of fault diagnosis in an apparatus having sensors
US5414645A · kind A · utility
110Cited by
2References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1992 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Oct 23, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S706/905
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The relationships between part nodes, including all sensor nodes in an apparatus system are expressed by connecting relations and weighing factors indicating the correlation. Output signals of all the sensor nodes in the system are converted to a state quantity by a membership function using fuzzy reasoning. With a sensor as a starting point, the nodes which are sequentially connected are traced and state quantities of each node are determined. The state quantities of each node are unified in a subsystem comprising this apparatus system and the subsystem in which the value of the state quantity is large is inferred to be faulty.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.