This document describes an automatic railway platform project used to open and close mobile platforms between train tracks. The system uses an Atmega16 microcontroller, proximity sensors, a DC motor driver and DC motor. It detects arriving and departing trains using proximity sensors and moves the platform accordingly for pedestrian safety. The automated design enhances safety for disabled or elderly pedestrians by avoiding the need to use staircases.

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2. RAILWAY TRACK
PEDESTRIANS
CROSSING
WITHOUT USING
STAIRCASE
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3. PRESENTED BY :
LAVANYA K S (21)
NIMISHA SURESH(26)
NIVEDITHA S(28)
PARVATHY SM(29)
BATCH 12
GUIDED BY :
DHANYA M
J GOPIKA RAJAN
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5. The project implements a mobile
platform in between railway tracks
This may be helpful to both handicapped
and elder citizens
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6. This automatic railway platform project
is used for automatically closing or
opening of the mobile platforms in
between the train tracks.
Normally the mobile platform connects
the two platforms, through which the
passengers can walk on the platform to
reach the next platform.
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8.  Atmega16 microcontroller
 Proximity sensor
 DC motor driver
 DC motor
 LED
 LCD
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10.  8 bit microcontroller , based on the AVR
enhanced RISC architecture.
 Reduced Instruction Set Computation.
 Fast execution and processing.
 512 bytes EEPROM.
 16kB in-system self programmable FLASH.
 1kB RAM memory.
 32 input-output channel.
 4 ports :- A,B,C,D.
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Port A (33-40).
Port B (1-8 ).
Port C (22-29).
Port D (14-21).
Crystal oscillator frequency (0-16MHz).
8 channel 10 bit ADC.
4 PWM channel.
Operating voltages : 4.5v-5.5v
Current consumption :
• Active mode -1.1mA .
• Sleep mode - 1µA.

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13. Step down transformer
• 9-0-9 (18v)
Rectifier
• Full wave bridge rectifier
Filter
• 2200µF , 25v capacitor.
Regulators
• LM7805 (5v)
• LM7812 (12v)
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14.  Operate under the
electrical principle
of inductance
 Consists of four
components
coil
oscillator
detection circuit
output circuit
 Operating voltage :-
5 to 30v DC
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15.  100RPM 12V DC motors with
Gearbox
 3000RPM base motor
 6 mm shaft diameter with
internal hole
 125 gm weight
 1.2kgcm torque
 No load current =
60mA(Max),Load current=300mA
(Max)
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16.  L293D is a typical
Motor driver IC
 It works on the
concept of H-bridge
 Act as a current
amplifier
 Consists of two
inbuilt H-bridge
circuits
 Supply voltage : 5-
36v
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AT2
atmega16
PB0
1
PB1
2
PB2
3
PB3
4
PB4
5
PB5
6
PB6
7
PB7
8
RESET
9
Vcc
10
GND
11
X1
12
X2
13
PD0
14
PD1
15
PD2
16
PD3
17
PD4
18
PD5
19
PD6
20
PD7
21
PC0
22PC1
23PC2
24PC3
25PC4
26PC5
27PC6
28PC7
29AVCC
30GND2
31ARef
32PA7
33PA8
34PA9
35PA10
36PA11
37PA12
38PA13
39PA14
40
16 x 2
GND
1
Vcc
2
Vca
3
Rs
4
R/W
5
E
6
DB0
7
DB1
8
DB2
9
DB
1
DB
11
DB5
12
DB6
13
DB7
14
A
15
K
16
12 mhZ1
R4
SW4
RESET
1
2
VCC
0
0
0
VCC
VCC
VCC
0
J1
Buzzer
1
2
3
VCC
0
U4
H bridge
1B
1
2B
2
3B
3
4B
4
5B
5
6B
6
7B
7
1C
16
2C
15
3C
14
4C
13
5C
12
6C
11
7C
10
COM
9
M2Motor
VCC 12 V
J2
Proximit
1
2
3
0
VCC
J3
Gsm
1
2
3
VCC
0
D30
LED
R25
1kLED
1k
D32
R27
1k
D33
LED
R28
1k

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Make the initial settings for train
and platform users
If arrival of
train in either
of directions
Buzzer &signal warnings to road users

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If
obstacles
Stop warning & move the
platform
Set up
the
signal for
train
If train
departures
Move the platform

20.  Whenever the train is arriving the first
proximity sensor gets disturbed due to the
interruption of the train . Thus the
microcontroller senses the arriving of the
train .Before making the platform move
backward the microcontroller gives siren to
alert the people who are on the track . After
certain time the controller moves the
platform backward by rotating the dc motor
in clockwise direction . For making the
bridge forward the microcontroller should
know whether the train has left or not.
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 For this the second pair is used . Whenever
the second sensor senses the train ,that is
when the second sensor is disturbed then the
microcontroller waits for the last
compartment to leave .Then the
microcontroller output is given to the dc
motor which makes the dc motor move in
anticlockwise direction making the bridge
move forward thereby making a way for the
pedestrians to move.

22. The power supply for the motor operation
and signal lights is a disadvantage .It can
be avoided by means of a solar cell.
The obstacle detection part can be
implemented using fuzzy logic. As it
thinks in different angles or aspects , the
system works still more efficiently.
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23.  The idea of automating the process of
railway platform operation will enhance
safety for the pedestrians who are disabled
and unable to use staircase.
 As the system is completely automated , it
avoids manual errors and thus provides
ultimate safety to pedestrians.
 The mechanism works on a simple principle
and there is not much complexity required in
the circuit.
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24.  www.atmel.com
 www.iraj.in
 www.iosrjournala.org
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