Circuit arrangement for safety-critical control systems
US5862502A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 31, 1996 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | May 31, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2270/413
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A circuit arrangement for safety-critical control systems, for example, for the control of anti-lock brake systems, is based on an at least partly redundant processing of input data which are taken into account for generating control signals. The control system is disconnected upon non-correlation of the signals. A microprocessor system is provided for data processing and includes two or more central processor units permitting parallel processing of the input data. The output data of the CPUs are checked for correlation. Each write/read memory of the microprocessor system has a generator to generate a test information. The write/read memories and the read-only memories are extended by memory spaces for the test information. In every writing or reading access to the memories, the contents of the memory space is tested with the associated test information for correlation, and an error identification signal is generated in the absence of correlation or plausibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.