Passenger transport system having central control unit and multiple field devices having an optimized failure detection method
US11919746B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2017 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Jul 3, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4282
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A passenger transport system includes a bus system transferring data between a central control unit and a plurality of field devices. In a failure detection method, the field devices are configured in an unbranched chain configuration and the control unit transmits a test telegram to a first field device to start a monitoring cycle during which each field device receiving the test telegram forwards the test telegram to a next field device in the chain. During the monitoring cycle, the control unit monitors a communication between the field devices occurring via the bus system, in order to detect when a field device does not forward the test telegram. A data volume transmitted via the bus system during the failure detection method is significantly reduced in comparison to conventional failure tests such that failures can be recognized more quickly and/or simpler hardware and/or software can be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.