4contents Introduction Existing system Focus on Components Block diagramsDescriptionsOver all workingResult and discussionConclusionReference
5INTRODUCTIONIn the rapidly flourishing country like ours, accidents in rail road railings are increasing day by day.The train accidents cause severe damage to life and propertyThis project deals with one of the efficient method to avoid train accidents.
6FOCUS ON Train derailment in curves and bends Collision between trains Automatic railway gate control
9Servo motor for gate control BLOCK DIAGRAMSBASE STATIONPowerMicrocontroller(PIC 16f877a)ZigBeeVibration sensorServo motor for gate control
10TRAIN SIDEPowerMicrocontroller(PIC 16f73)ZigBeeBrake control
11ZIGBEE Networking protocol IEEE 802.15.4 suite for high level communicationUses mesh networkBased on OSI architectureData rate-250 Kbits/sec
12SERVO MOTOR Rotary actuator Modified form of DC motor Precise control of angular positionBased on PWM switching
13MICROCONTROLLER PIC16f877a (Base station) 8-bit microcontroller. 40 or 44 pin package.256 bytes of EEPROM data memory.Interfaced with the input sensing devices.MICROCONTROLLERPIC16f877a (Base station)
14MICROCONTROLLER PIC16f73 (TRAIN SIDE) 256 bytes EEPROM. 8 KB of flash memory.28 pin package.Placed inside the train.MICROCONTROLLERPIC16f73 (TRAIN SIDE)
15Vibration sensor Uses piezoelectric effect Vibration indicates the arrival or departure of train.Sense the position of train at 1 to 3km away.
16types Mini sense 100-vertical Mini sense 100-horizontal Continued…. The sensor used here is mini sense 100 vertical
17Mini sense 100 vertical High sensitivity Good frequency response Continued….Mini sense 100 verticalHigh sensitivityGood frequency responseExcellent linearityShielded constructionAnalog outputWith stands high shock
18Collision between trains Sensor sense the vibrationMore than one sensor show high valueµc sends signal to µc in train sideUsing zigbee transceiver sectionPower supply will cutoffCollision can avoided
19TIP 122 silicon Epitaxial-Base NPN power transistors switching applications.High power transistorPower dissipation - 2wDC collector current - 5vNo of pins - 31. Base 2.Collector 3.Emitter
20Train derailment in curves and bends Sensor sense continuously.µc doesn’t get value.µc sends signal to µc in train sideUsing zigbee transceiver sectionPower supply will cutoffTrain will be stopped.
21Automatic railway gate control Sensor sense vibration 3 km away.Output given to µcµc give instruction to close the gateGate is closed automatically using servomotor.Gate is opened after the train is passing
22Automatic railway gate control Continued….Automatic railway gate controlSTARTCHECK ANY DATA PRESENTIFDATA RXEDFROM TRAINNOYESGATE CLOSED
23OVER ALL WORKINGThe proposed model makes use of ZigBee protocol as a medium of transferring information
24Result and DiscussionThe sensors sense the input and sends to the microcontroller, where itresponds and givescommand to the particular component with predefined algorithm.The time parameters are crucialwhich can be easily changed and modified using Micro-controllers.Thus, this device would work incoherence would help to reduce the train collisions.Train safety
25CONCLUSIONIn this project, an anti-collision system for trains have been designed, simulated and tested.The simulation has been done using proteus electronic simulation packageTrain collisions , de railing & rail road accidents are avoided.Hence it is expected that, major train mishaps can be prevented and human life saved if this system is implemented.