1. “SPEED CHECKER FOR HIGHWAYS”
INTRODUCTION
While driving on highways, motorists should not exceed the maximum speed limit permitted for
their vehicle. However, accidents keep taking place due to speed violations since the drivers tend
to ignore their speedometers.
So some system is required which will inform the traffic control unit about such vehicles
exceeding the speed limit to avoid accidents on the highway.
This speed checker will come handy for the highway traffic police as it will not only provide a
digital display in accordance with a vehicle’s speed but also sound an alarm if the vehicle
exceeds the permissible speed for the highway.
As soon as a fast moving vehicle exceeds the speed beyond the specified limit, an alarm is
sounded and traffic control unit will be informed about the vehicle. Thus by using this system,
we can manage to control the accidents occurring on highways and ensure drivers safety.
SPECIFICATIONS
Operating voltage : 5 volts DC
Sensors used : IR LEDs
Distance between sensors : 1m
Alarm rating : 5V DC
Minimum speed : 2 kmph
Maximum speed assumed : 200kmph
Box dimensions : 300 mm x 100 mm x 150 mm
Supply : 230 V, 50 Hz AC
LITERATURE SURVEY:
In market today many speed guns are available which use RADAR, which works by bouncing a
microwave frequency of a moving object & measuring distance in the transmitted, & returned
frequency, this is called Doppler Shift. If the returned frequency is higher than transmitted
frequency called a compressed the vehicle is approaching the RADAR gun. If the returned
frequency is lower called stretched the target vehicle is going away from RADAR gun.
In a laser speed gun measure the round-trip time for light to reach a car and reflect back. A laser
speed gun shoots a very short burst of infrared laser light & then waits for it to reflect off the
vehicle. The gun counts the number of nanoseconds it takes for the round trip & by dividing by
two it can calculate the distance to the car.
But unlike the above-mentioned complicated methods of speed tracking, we have used relatively
simpler technique to calculate the speed of any vehicle. We have two IR beams each of them
facing a infrared light sensor. As soon as first beam of light is intercepted an interrupt will be
generated. This will trigger the timer. Then as soon as second beam is intercepted the timer will
be stopped. Knowing the distance between two sensors and the time elapsed we can easily
calculate speed of the vehicle. This speed will be processed by the microcontroller to check
whether it is in the specified limits.
THIS PROJECT'S MORE INFORMATION WILL BE POSTED SOON>>>.....