Presentation1

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PRIORITIZED TRAFFIC SIGNAL MANAGEMENT FOR EMERGENCY VEHICLE

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PROJECT GUIDE : MRS.M.M.SHANMUGA PRIYA B.E. BATCH MEMBERS : P.NITHYANANDHAN G.PALANIAPPAN K.S.PANDIAN P.RABINDER SINGH

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AIM: The main aim of the project is to design a unique dynamic control system for the traffic signals based on the traffic density and giving priority to the Emergency vehicles like ambulances. This is achieved through a Microcontroller, IR Sensor, RF Transmitters and Receivers

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ABOUT THE PROJECT: IN THIS PROJECT, IR SENSOR IS PLACED IN THE ROADS NEAR THE TRAFFIC SIGNAL WHICH IS USED TO FIND THE TRAFFIC DENSITY. DEPENDING UPON THE DENSITY OF THE ROADS THE CORRESPONDING SIGNALS ARE GIVEN. THE PROJECT PROVIDES SPECIAL FEATURES FOR EMERGENCY VEHICLES(AMBULANCE, FIRE SERVICE….). IF THE EMERGENCY VEHICLES PROCEEDS THE SIGNAL IT WILL SEND SIGNAL TO THE BASE UNIT PLACED AT THE CENTRE.IRRESPECTIVE OF THE DENSITY ON OTHER ROADS THE GREEN SIGNAL IS GIVEN TO THE ROAD IN WHICH EMERGENCY VEHICLE IS ARRIVING. SENSOR

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BASE UNIT TRANSMITTER SECTION

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CIRCUIT DIAGRAM

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The AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of Flash Programmable and Erasable Read Only Memory (PEROM). The device is manufactured using Atmel’s high density nonvolatile memory technology and is compatible with the industry standard MCS-51™ instruction set and pinout. MICROCONTROLLER ATMEL 89C51 FEATURES 128 x 8-Bit Internal RAM 32 Programmable I/O Lines Two 16-Bit Timer/Counters Six Interrupt Sources Programmable Serial Channel Low Power Idle and Power Down Modes

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RF TRANSMITTER FEATURES Complete RF transmitter module no external components and no tuning required High performance SAW Based Architecture with a max. Range of 100 feet at 4800 bps data rate. Interface directly to encoders and microcontrollers with ease. Low power consumption suitable for battery operated devices. 4 pin compact size module. Can be directly used in your PCB Straight pin out is the standard in these modules Right angle out is optional Cab be used with fixed code and rolling code encoders or directly with microcontrollers.

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IRE / IRD We are using invisible INFRARED RADIATION SYSTEM, which is harmless and it has highest wave length than the existing VIBGYOR color spectrum. I.R. rays can be generated by applying electric current to GALLIUM ARSENIDE semiconductor material. I.R. DETECTOR is having reverse characteristics of the I.R. EMITTER. I.R. DETECTOR drives a NPN transistor which provides inverse output at collector end (If there is no entry = high).

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Features • Full DTMF receiver • Less than 35mW power consumption • Industrial temperature range • Uses quartz crystal or ceramic resonators • Adjustable acquisition and release times • 18-pin DIP, 18-pin DIP EIAJ, 18-pin SOIC, 20-pin PLCC DTMF GENERATOR

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ASSEMBLY CODING (PROGRAM) SEL DATA 10H DTMF EQU P1 STD BIT P1.4 STACK EQU 30H TICK DATA 7FH SECONDS DATA 7EH FLAGS DATA 20H FLAG1 BIT FLAGS.1 TRAFFIC_1 BIT P0.6 TRAFFIC_2 BIT P0.7 YELLOW BIT P0.5 SWITCH BIT P0.4 LED BIT P0.3 ;------------------------------------------------------ ORG 00H JMP BEGIN ;------------------------------------------------------ ORG 000BH ;TIMER0 JMP ISR0 ;------------------------------------------------------- ORG 0100H BEGIN: MOV SP,#STACK MOV P1,#0FFH SETB STD MOV P2,#00H

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SETB TRAFFIC_1 ;INIT INPUT SETB TRAFFIC_2 ;INIT INPUT SETB YELLOW ;INIT INPUT SETB SWITCH ;INIT INPUT SETB LED; OUTPUT MOV R0,#00H MOV TMOD, #21H ;init serial port MOV TH1,#0F8H MOV TL1,TH1 MOV TCON, #00H MOV SCON,#50H SETB TR1 MOV TH0,#0C5H ;1 sec-3.57mhz crystal MOV TL0,#0BDH MOV TICK,#20 SETB EA ;enable global interrupt SETB ET0 CLR FLAG1 ;------------------------------------------------------ START: JB SWITCH,START1 JNB SWITCH,$ ;CALL DEBOUNCE JMP START2 ;------------------------------------------------------ START1: JB TRAFFIC_1,START JNB TRAFFIC_1,$ SETB TR0

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JB TRAFFIC_2,$ JNB TRAFFIC_2,$ CLR TR0 MOV A,R0 CJNE A,#0AH,$+3 JNC START JNB STD,$ JB STD,$ CLR LED CALL DELAY3 SETB LED MOV SEL,DTMF MOV A,SEL ANL A,#0FH ADD A,#20H MOV SBUF,A JNB TI,$ CLR TI START5: JMP START ;------------------------------------------------------ START2: CALL DEBOUNCE JB YELLOW,START5 CALL DEBOUNCE JNB STD,$ JB STD,$ CLR LED CALL DELAY3 SETB LED

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MOV SEL,DTMF MOV A,SEL ANL A,#0FH ADD A,#10H MOV SBUF,A JNB TI,$ CLR TI JMP START ;------------------------------------------------------ DELAY3: MOV R3,#35H J7: MOV R4,#30H J5: MOV R5,#30H DJNZ R5,$ DJNZ R4,J5 DJNZ R3,J7 RET ;------------------------------------------------------- DEBOUNCE: MOV R6,#20H J01: NOP MOV R5,#20H DJNZ R5,$ DJNZ R6,J01 RET ;------------------------------------------------------ DELAY: MOV R3,#12H J2: MOV R4,#14H J3: MOV R5,#1FH J4: MOV R6,#12H

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DJNZ R6,$ DJNZ R5,J4 DJNZ R4,J3 DJNZ R3,J2 RET ;------------------------------------------------------ ISR0: PUSH PSW PUSH ACC CLR TR0 MOV TH0,#0C5H MOV TL0,#0BDH SETB TR0 DJNZ TICK,EXIT MOV TICK,#20 INC R0 MOV A,R0 EXIT: POP ACC POP PSW RETI ;------------------------------------------------------ END

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THANK YOU