Abstract : The engines of trains are equipped with microcontroller containing all the data and information about all the trains. Practically, in Indian railway the microcontroller contains the registration nos. of trains.
The motor which runs the train is under the control of microcontroller. On the head lamp of engines of train A and train B are added a photo diode and a laser that emits pulses at fixed time intervals.
If train B is moving on the same track towards the train A then the laser emitted by the train B will be sensed at engine of train A resulting in microcontroller to stop the motor and thus stopping train.
Thus the working of anti-collision detector is based on a bi-directional process.
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