03-10-2016, 12:07 PM
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ABSTRACT:
The involuntary train collision system
briefs about the railway gate signal
controls and railway track change signal
control using radio frequency
transmitter. Using this RF transmitter we
can prevent the collision between the
two trains in same tracks by opposite
direction. Here antibracking system are
also be used. But any voltage short
between the transmission lines during
the RF signals, in that situation we uses
the large magnetic power in front of the
train to controls the signal automatically
i.e., if the train before crosses the tracks
are tollgates the magnetic power in the
train changes the green signal to red
signal. After train crosses the track the
signal automatically changes red to green even in all the tollgates and the
track signals. Now a day’s electrical
system controls requires more
investment. By this magnetic control
system we can save lot of money per
tollgate.
INTRODUCTION:
With the increased demand for
railway services, overall railway infrastructure has been developing
rapidly in the last two decades, including
its communication systems. In the past
wired communication systems were
used for signalling and data
communication in the railway industry.
Recently wireless communication
systems have emerged as alternatives
to supplant wired systems in the railway
industry. Railway communication and
Signalling systems are used to monitor
the train health in order to maintain
reliable, safe and secure operation. In
the last quarter of the 19
th
Century new
methods of communication and
Signalling systems were developed to
make railroads safer, faster, and higher
in capacity. Signalling and
communication technologies continue
to advance at a remarkable pace and a
great number of signalling strategies
have been developed in order to keep a
safe distance between trains and to
safeguard rail personnel.
After the invention of railway
technology, there has been a continuous
upgrading and introduction of new
infrastructure and communication and
Signalling (C&S) technologies, ranging
from the semaphore signals in England
in the 1840s, to the present
sophisticated wireless communication
technologies. The first application of
automatic train control with cab signal
occurred in the early 1920s, which was
upgraded to coded track circuits in the
1930s. A number of companies are
engaged in improving the C&S systems
for railway systems. As radio systems become more reliable and cheaper, it
becomes feasible to use ad-hoc radio
communications as an extra layer of
safety, to prevent crashes between
trains in a light rail control system. This
has led to the invention of new features
for railway safety, high-speed
monitoring of railway conditions. This
paper describes a recently developed
project that can be used to avoid the
accident automatically using RF
Communication mainly used for Main
and Sub Transmission data
transmission.
2. PREVENTING SYSTEM IN INDIA:
New Delhi: Strengthening the
safety infrastructure, Railways has
developed a new system to prevent train
accidents. The new system, Train
Collision Avoidance System (TCAS), is a
fusion of Train Protection Warning
System (TPWS) and Anti-Collision
Device (ACD). "Automatic braking
system will be applied if two trains
come closer on a same track with the
TCAS in force," said Railway Board
Chairman Vinay Mittal.
TPWS and ACD are already
operational on a trial basis on selected
routes. As a pilot project, TPWS has
been provided on Chennai suburban
section and another pilot project is in
progress on Nizamuddin-Agra section.
TPWS is also being provided on Dum
Dum-New Garia section of Kolkata Metro. As far as ACD, developed by
Konkan Railway, is concerned, the
system is operational as a pilot project
on 1736 km in Northeast Frontier
Railway. However, ACD witnessed
operational problems in Southern
Railway. So it can be extended only after
resolving those problems. Based upon
experience gained from ACD and TPWS
systems, we have now taken up
development of TCAS. TCAS is a fusion
of functionalities of TPWS and ACD and
prevent signal passing at danger as well
as collisions. The new system, Train
Collision Avoidance System (TCAS), is a
fusion of Train Protection Warning
System (TPWS) and Anti-Collision
Device (ACD).
3. ADVANCED PREVENTION SYSTEM IN
ABROAD:
The German Aerospace Center
(DLR) is developing a Railway Collision
Avoidance System (RCAS), a 'safety
overlay' system which can be deployed
on top of any existing safety
infrastructure in train networks. The
core idea of RCAS is to broadcast the
position and intended track of trains as
well as additional data like vehicle
dimensions to all other trains in the area
using ad-hoc train-to-train
communications. This enables train
drivers to have an up-to-date accurate
knowledge of the traffic situation in the
vicinity, and act in consequence.
Computer analysis of the received
information, the own position and
movement vector and an electronic
track map detects possible collisions, displaying an alert signal, and advising
the driver of the most convenient
strategy to follow in order to avoid the
danger. The system is adaptive to a
variety of situations like advancing
trains or road vehicles or obstacles.
The RCAS project is a DLR
internal project in DLR's transportation
research programme, with participation
of three different of its research
institutes. In the first three years of the
project, the responsibility of the
scientists of the Institute of
Communications and Navigation
(project lead) included the development
of the robust train-to-train
communications technology for railway
specific conditions. The engineers of the
Institute of Transportation Systems took
particularly care of the operational
aspects of RCAS. Researchers of the
Institute of Robotics and Mechatronics
complemented the RCAS approach by
optical subsystems.
Main aspects of the recently
started phase II of the project include
multi-sensor navigation and -integrity,
improved and new algorithms for data
fusion and situation analysis, optical 3D
subsystems as well as a comprehensive
safety review.
PROPOSED IDEA:
This Prevention system is used to
avoid the accident automatically by RF
Communication which can be used in
Main and Sub Transmission data
transmission
5. STEPS TO BE FOLLOWED:
Ø This project has 2 modules. One is RF
and Control Unit by both Main and
sub main Unit. The second module
Auto tracking by display and Control
Unit.
Ø When we start the train which is from
current Station that is called Main
Train which is coming from station
i.e. Sub main Train.
Ø When we start the train from station
automatically will identify the
submain1 or 2 or etc.
Ø This auto identify is to give a buzzer
alarm. By that time you have to reply
to opposite train.
Ø If the both train is not identify the
train automatically will stop without
driver.
Ø When the train is coming in which
track and the train name also will
detect automatically
Ø If we didn’t get any response from
any train will automatically will stop
the both train.
Ø Here for anti collision tracking
proximity sensor is utilized
Ø Whenever the collision is monitored
CONCLUSION:
This paper introduced a low cost,
low-power for railway traffic control and
train collision avoidance. In this paper,
we discuss the design of proposed
safety system for railways