Modern vehicles for public transport by rail or road have control, monitoring and information systems for a range of essential functions like condition-based monitoring and maintenance, air conditioning and heating, traction control, brake control, door control, lighting and powerpack.
Vehicle gateways are used to enable a common communication platform. Real-time passenger information (RTPI) based on current vehicle positions, infotainment functionality and automated fare collections (AFC) are provided on board the vehicles. These systems support satellite positioning, data logging, wireless data communication, retrieving data, and can be integrated with other embedded electronic systems.
As environments are often harsh and narrow, computers in transportation applications must be robust and compact. They are typically networked by fieldbuses (MVB, Real-time Ethernet (TRDP, PROFINET, CIP) WTB, CAN, IPTCom) increasingly also by safe Ethernet variants.
To fulfil the rail- and road-specific environmental and development quality standards, we work with market-proven procedures, technologies and components. Our solutions are always compliant with EN 50155 (railways) in all its parts or ISO 7637-2 (automotive E-mark) and SIL 4 capabilities.
Passenger Information Systems
Infotainment solutions give passengers orientation regarding stops, schedules and routes, hints for changing trains, short-term changes of the route or delays. They also provide entertainment, for instance by displaying news of the day and the weather forecast or by playing movies and music.
Door Controller Communication Interface
For the connection to the train communication network (MVB, HDLC, IPTCom, TRDP, TCP/IP UDP, CIP, PROFINET), leading door manufacturers rely on duagon interface cards. The communication interface controls, for example, whether the door should open or close or on which side of the train the doors should open. Vice versa the VCU (Vehicle Control Unit) receives status and diagnostic information about the doors. Firmware updates are of course, how else should it be, also uploaded via the interface card.
Driver Desk HMIs for Trains and Coaches
The driver desk in a coach or bus enables the driver to access various data, e.g. information about the route and traffic or live pictures from internal surveillance cameras. Additionally, these displays can be used to print and validate tickets.
Diagnosis and Maintenance Systems
In one application, a predictive maintenance system is combined with passenger information services like pending seat reservation, current trip information and potential connections. The platform takes care of all data transfer between individual trains and the railway company's central servers via UMTS/LTE, WLAN and GPS.
Maintenance of tracks is usually performed by special machines and during nighttime when railway traffic is lower. In this application the online track measurement is done with regular trains, replacing specialized measurement trains.