This project is a standalone Automation of unmanned railway gate control system using AT89S52 microcontroller. Use of embedded technology makes this closed loop feedback control system efficient and reliable. Microcontroller allows dynamic and faster control. AT89S52 micro controller is the heart of the circuit as it controls all the functions. 

The main aim of this project is to automize the unmanned railway gate i.e. the gate is closed automatically whenever the train comes and is opened after the train leaves the railway-road crossing. Using this project, the arrival of the train can be identified in either direction. For this purpose, two IR transmitter and receiver pairs are used in this project.  LCD is provided to display the information about the arrival and departure of the train.

One IR TX-RX pair is placed at one end of the railway gate. The second pair is placed at another end of the gate. In each pair, the TX and RX are arranged face to face across the railway track i.e., TX is situated at one side of the track and RX is placed at another side of the track since the RX should continuously get the signal from the transmitter. 

Whenever any train is coming on the track, the IR signal will be disturbed due to the interruption of the train. Thus the microcontroller identifies the arrival of the train. Before closing the gate, the microcontroller activates the siren to alert the people who are on the track. After 30 sec, the controller closes the gate by rotating the stepper motor.

The microcontroller should know whether the train left the crossing or not to open the gate. For this purpose, the second IR pair is used. This IR pair identifies the train since the IR signal is interrupted when the train comes in between the TX and RX. The micro controller will wait for the last compartment to leave the IR pair and after leaving, the receiver again gets IR signal. Till this time the gate is closed. Now, after the train had left the crossing, the microcontroller will open the gate by rotating the stepper motor.

This project is more useful and there is no chance for accidents since time delays or length of the train is not calculated. Just the IR pairs will detect the arrival and departure of the train. 


Software Tools:

  1. Keil compiler
  2. Orcad.

Hardware Tools:

  1. Microcontroller AT89S52.
  2. IR sensors
  3. ULN driver and stepper motor
  4. LCD