One third of the number of fatal or serious accidents are associated with excessive or inappropriate speed, as well as changes in the roadway. So to overcome this problem we are introducing a automatic speed controller in vehicles at schools, hospitals and danger zones. In this zones, the vehicles are not possible to move above the predefined speed limit. It is basically a Mechatronics system. Ie it is a combination of both mechanical and electronics system.

1.  
Group members-
Binil George
Gokul K G
Jinto George
Jithin George
Internal Guide-
Asso.prof Sreeraj K P
Mangalam college of engineering
ECE dept

2.  Objective
 Relevance of the project
 Introduction
 Block diagram level of explanation
 Flow chart/ algorithm
 Circuit diagram
 Hardware used
 Software used
 PCB layout & Implementation
 Key issues
 Results of the work
 Advantages & Applications
 Future scope
 Conclusion
 References
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3.  Automatic Speed Governing automatically controls
the speed of the vehicles at school and hospital zone
etc.
 To avoid accident of vehicles at speed limit zones.
 To help the passengers to cross the road safely
without facing any danger from high speed vehicles.
 This project can be used to avoid the rash driving of
the drivers.
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4.  By using this system we can effectively controls the
speed of the vehicle in different zones.
 We can reduce the accidents and thus we can save
many lives and valuable properties.
 We can controls the rash driving of the drivers.
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5.  Every year, we find more and more road accidents due to
increased traffic on the roads.
 Nowadays people are driving very fast; accidents are
occurring frequently, we lost our valuable life by making small
mistake while driving (school zone, hills area, and highways).
 So this system can be used to avoid such kind of accidents
and to alert the drivers and to control their vehicle speed.
 The project is composed of two separate units: zone
transmitter unit and receiver unit.
 Once the information is received from the zones, the
vehicle’s embedded unit automatically reduce the speed
according to the zone.
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6.  TRANSMITTER
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7.  RECEIVER
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8.  The speed of vehicles is controlled by the RF
communication method.
 Transmitter in speed restriction zones.
 RF receiver in the vehicle.
 When a vehicle enters this zone, then these transmitters
will send continuous coded signal to those vehicle.
 The receiver in vehicle will receive those signals and
then micro controller.
 Microcontroller controls the airflow to the carburetor
using a stepper motor and speed is reduced.
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10.  Transmitter
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11.  Receiver
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12. 1. Atmel micro controller
 AT89C51 is the 40 pins, 8 bit Microcontroller
manufactured by Atmel group.
 The AT89C51 is a low-power, high-performance CMOS
8-bit microcontroller.
 It has 4kb on chip ROM and 128 bytes internal RAM
and 32 I/O pin as arranged as port 0 to port 3 each.
 All four ports in the AT89C51 are bidirectional.
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 The operating voltage of AT89C51 is 5v.
 Its operating frequency is 0 Hz to 24 MHZ.

14. 2. ZigBee
 ZigBee is a low-cost, low-power, wireless network.
 Due its low power consumption limits transmission
distances to 10–100 meters line-of-sight.
 ZigBee chips are typically integrated with
microcontrollers that have between 60-256 KB flash
memory.
 ZigBee is used for short-range low-rate wireless data
transfer.
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15.  ZigBee has a defined rate of 250 kbit/s, best suited for
the data transmissions from a sensor or input device.
 ZigBee is simpler and less expensive than other
wireless networks.
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16. 3. LCD DISPLAY
 16x2 LCD(Liquid Crystal Display) electronic display
module is used here as display device.
 A 16x2 LCD means it can display 16 characters per line
and there are 2 such lines.
 This LCD has two registers , namely , Command and
Data registers.
 Economical, easily programmable, have no limitation of
displaying special &even custom characters.
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17.  LCDs are used in a wide range of applications including
computer monitors, televisions.
 The LCD screen is more energy efficient than others.
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18. 4. PIC MICROCONTROLLER
 PIC 16F877 is one of the most advanced microcontroller
from Microchip.
 PIC stands for Peripheral Interface Controller.16 stands
for mid range series and F stands for flash memory.
 High performance RISC CPU.
 Low power- high speed CMOS flash/EEPROM.
 PIC16F877 has 5 basic input/output ports-Port
A,B,C,D,E
 3 timers,2 CCP modules and 10bit, up to 8 channel A/D
converter is used in it.
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19.  Easy to use ,because only 35 single word instructions to
learn.
 Maximum operating frequency is 20MHz.
 Wide operating voltage range (2.0 – 5.56)volts.
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20. 5. STEPPER MOTOR
 A stepper motor is an electromechanical device which
converts electrical pulses into discrete mechanical
movements.
 Stepper motors work on the principle of
electromagnetism.
 Stepper motor is similar to an actuator, which is the
movable part.
 The speed of the motor shafts rotation is directly related
to
the frequency of the input pulses.
 The length of rotation is directly related to the number of
input pulses applied.
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21.  Stepper motor performance is strongly dependent on the
driver circuit.
 The operating voltage range is 12 volts.
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22. 6. POWER SUPPLY
 To provide power to the entire system.
 12v power supply is used for stepper motor.
 5v power supply is used for microcontroller and other
devices.
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23. 1. PICC COMPILER
 provides a complete integrated tool suite for developing
and debugging embedded applications running on
Microchip.
 contain Standard C operators and Built-in Function
libraries that are specific to PIC.
 It providing developers with a powerful tool for accessing
device hardware features from the C language level.
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24. 2. PIC SIMULATOR IDE
 PIC Simulator IDE is a powerful application that supplies
user-friendly graphical development environment.
 It contains basic compiler, assembler, disassembler and
debugger.
 PIC Simulator IDE currently supports the
microcontrollers from the Microchip of 12F and 16F
family.
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25. 3. Orcad
 It is a PCB design tool.
 It provide easy access to company component
databases and part information, so designers can reduce
the amount of time they spent.
 Provides access to all components and offering greater
flexibility when choosing design components.
 It boosts schematic editing efficiency of complex designs
through hierarchical and variant design capabilities.
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26.  The range of the ZigBee transmitter is less which is 10m.
 This project consists of mechanical section, which is
difficult to implement
 It is difficult to control the airflow to the carburetor of the
vehicle.
 The modifications given for the conventional carburetor
or fuel injection systems are quite difficult.
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27.  The speed of the vehicle decreases automatically when
it reaches to the ZigBee range.
 We can control the over speed and rash driving of the
drivers.
 We can reduce the accidents and thus we can save
many lives and valuable properties.
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28.  The cost of the system will be very less compared with
its application.
 To help the passengers to cross the road safely without
facing any danger from high speed vehicles.
 This system helps to avoiding the rash driving of the
drivers.
 The vehicle will move only with the designed speeds
corresponding to the zones
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29.  We can modify the system with the help of GPS to
identify the zones.
 We can also modify the system with efficient braking
system in association with air flow control to the
carburetor.
 This system can be more effectively used for any kind of
automobiles such as lorries, buses, cars, bikes etc.
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30.  By using this system we can effectively control the speed
of the vehicle according to different zones.
 This system can be implemented in any kind of vehicles.
 By using this system we can control the over speed and
the rash driving of the drivers.
 We can use this system in highly populated regions and
thus we can decrease the effects of accidents.
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31.  Telaprolu,m.k,sarma,V.V.;.;ratankanth,E.K.;Rao,S.
N.;Banda,v.,vehicular Electronics and safety (ICVES),
IEEE international conference pune (2009).
 Gangadhar, S.; R N shetty Inst. Of Technol, An
intelligent road traffic control system, IEEE conference
publication kahargpur (2010)
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32. THANK YOU
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