A system for detection of objects along railway lines.
In recent years the safety of railway systems has become an important
requirement for the society in where we live. The clamour raised by a single
railway accident is higher than that raised by the innumerable serious accidents
occurring daily involving automobiles.
Large amounts of money have been invested in transportation safety, and in
particular for railway signalling systems. Notwithstanding these investments,
the problem of obstacles on railway lines is still not solved.
Railway accidents can be caused by accidental falling of objects onto the
The problem related to obstacle detection is much more important for high-speed
lines, where the time available to the Railway System Authority for braking the
train is reduced to a minimum and in extreme
circumstances can be non-existent. To solve the problem related to the presence
of obstacles on the railway lines, Intecs has developed a product called SIRIO.
SIRIO is an automatic system for the detection of targets along the railway
lines. It consists of a remote control system and many peripheral boards that
are so-called SIRIO nodes. These nodes have been designed to be installed close
to bridges over the railway or to the entrance of tunnels, where dangerous
obstacles could fall on the tracks below, due to landslides or accidents.
A SIRIO node is composed by four Radar Sensors developed by IDS (Ingegneria Dei
Sistemi Italy), four reference reflectors and one outdoor cabinet containing all
the needed electronic equipment.
The target detection is done by multi-beam radar sensors without any use of
mechanical moving parts. As a result, a high MTBF value is obtained.
Each SIRIO node is able to signal a target detection directly by means of its
outputs without the remote control system support: a node can be connected
directly to the central signal system.
This system can detect a train in transit or stopped in the monitored area
without generating a false alarm confusing the train with an obstacle.
All of the errors and auto-diagnosis results are stored in a non-volatile
memory. The information stored in the non-volatile memory is provided to the
operator both by using a special program installed on an external PC or laptop
connected to the system through an RS-232 interface or via remote control
The remote control system has a GUI (Graphical User Interface) to monitor the
status of the nodes.
An optional video system (day and night) is also available that is able to
record video of the monitored area. The video functionality can be activated
mainly in the following way:
The acquired images are stored locally in a digital video recorder and
can be downloaded by the remote control system.
It is also possible to start automatically a real time video streaming when
obstacle detection occurs. SIRIO has been developed according the EN 50129
and EN 50128 standards for SIL4 applications.
The SIL4 level is achieved using different techniques: multi-beam and
redundant sensors, use of reference target, complex signal processing algorithm
and sophisticated self-test procedures (HW-SW).
Main Technical Data
- Prevent train accidents due to dangerous objects falling on the tracks
- Designed to be installed close to the railway section where dangerous obstacles could fall on the tracks
- Remote control functionality
- CENELEC compliant (SIL4)
- Train detection
- Installation flexibility through configuration parameters
Obstacle size: 0.8 m x 0.8 m x 0.8 m
Train speed range: 0÷350 Km/h
Surveillance area size: Max 9 m x 14 m
Reliability: > 10 years
Output interface: + 48 Vcc 0.5 W, or open close contacts
Safety requirements: EN50129, EN50128 SIL 4
Serial line interface (for testing, setup, diagnostic log): RS232
Temperature range: -25 C° to 70 C°