13-06-2012, 01:55 PM
AUTOMATIC RAIL WAY GATE CONTROL AND PARAMETER MONITORING
AUTOMATIC RAIL WAY GATE CONTROL AND PARAMETER MONITERING.pptx (Size: 2.19 MB / Downloads: 42)
introduction
The main purpose of this project is to provide cost effective safety measure at level cross
This project is a part of complete system for monitoring the operation of an LC gate with out manning it . it basically collect the data and performs actions(opening and closing of gate)
It works on the data provided by the GPS system on the loco.
General description of this system
In the GPS based wireless protection system both loco and gate units will be provided with dual wireless communication system .
The major components of the gate controlling system
RF transceivers
PIR sensor
Alarm circuitry
Warning signal circuitry
Motor circuitry(server motor or stepper motor)
Microcontroller(PIC)
RF transceivers
RF transceivers are electronic devices that receive and demodulate radio frequency (RF) signals, and then modulate and transmit new signals.
RF transceivers consist of an antenna to receive transmitted signals and a tuner to separate a specific signal from all of the other signals that the antenna receives.
Radio techniques are used to limit localized Interference and noise.(Amplitude modulation(AM),Frequency modulation(FM),ON-OFF key (OOK),Amplitude shift key(ASK),Frequency shift key(FSK),Phase shift key(PSK),Etc)
Important specifications for RF transceivers (include data rate, sensitivity, output power, communication interface, operating frequency, measurement resolution, and maximum transmission distance.
Data rate is the number of bits per second that can be transmitted.
WORKING OF THIS SYSTEM
this project utilizes two powerful PIR transmitter and two receivers ,one pair of transmitter and receiver is fixed at up side (from the train comes) at a level higher than human being in exact alignment
and similarly other pair is fixed at down side of the train direction sensor activation time is so adjusted by calculating the time taken at a certain speed to cross at least one compartment of standard minimum size of the Indian railway