Fault-tolerant failsafe computer system using COTS components
US9665447B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2013 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Oct 23, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/165
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system includes a safety relevant component that generates a data packet in response to receiving a request to perform a task and that communicates the data packet. The system further includes a first fail-safe chassis (FSC) that continuously generates a first chassis health signal, that determines whether the data packet is valid, and that selectively determines whether to de-assert the first chassis health signal based on the determination. The system also includes a second FSC that continuously generates a second chassis health signal, that determines whether a copy of the data packet is valid, and that selectively determines whether to de-assert the second chassis health signal based on the determination. The system further includes a safety relay box module that determines whether to instruct the first FSC to operate in a predetermined mode based on the first chassis health signal and the second chassis health signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.