Transceiver system for communication over wire laid along the path of guided/vehicles
US5245335A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1991 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | May 28, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/40273
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The system comprises transceivers employing identical modems, one located at a fixed position and connected to the wire and one on a vehicle guided along the wire. The transceiver's specialized modems may be connected to a central host which may be a computer, to a programmable controller, or to a communications bus as required. Additional transceivers may be connected to the communications bus for communication between the central host and additional wires. All central host signals are transmitted to all wire connected modems and sent out on all wires. All signals from vehicle modems are transmitted back to the central host. Each transceiver is adapted to employ one or more identical modem, each connected to a different wire. Communication between the wire and a vehicle is by an inductive coupler employing ferrite rods which is designed such that the transfer function from the fixed modem to the vehicle mounted modem is substantially identical to the transfer function from the vehicle modem to the fixed modem. The vehicles may be wired guided vehicles controlled by low frequency signals on the wire. In this case a special coupling circuit is employed so that no modification is req…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.