Seminar ON

Speed Detection Of Moving

Vehicle Using Speed Camera

Presented by

SHEEJA.C.K

INTRODUCTION

Speed cameras were introduced in west London in 1992

Following their success in reducing speed related accidents

Speed camera also known as safety cameraThe basic principle behind speed camera is

DOPPLER EFFECT and RADAR TECHNOLOGIES.

DIFFERENT NAMES OF SPEED CAMERAS

Traffic enforcement cameraRoad safety cameraRoad rule cameraPhoto radarPhoto enforcementRed light camera

Different Types Of Speed Cameras

INTRODUCING THE DOPPLER EFFECT

The principle of DOPPLER effect is well

known in the study of sound

Doppler is the introducer of DOPPLER

effect and hence the name

The principle of speed camera is the

DOPPLER effect and radar technologies

FORMULA FOR DOPPLER EFFECT

The principle of speed camera is the DOPPLER effect that can be described by the formula

Fm=2vfecos( /c ) Fm=frequency of the received signal V=speed of vehicles Fe=frequency of transmitted signal =angle between the transmitted

signal and path along which the vehicle travels

C=propagation speed of the signal in the air

α

α

The Doppler Effect

WHAT IS RADAR?

Radio detection and rangingIt is an object detection system,

which uses the radio waves to determine the range, altitude, direction and speed of objects

It is the major part of speed cameraAerials of radar is placed parallel to

the road not across them

WHY ARE SPEED CAMERAS WHERE THEY ARE?

Areas where accidents frequently occur

Areas where speeding is one of the

main cause for accidents

Areas where human police control is

difficult

Working Of Radar

WORKING

Vehicle is in speeding ,as it passes by a

automatic radar speeding is detected,

digital picture of the vehicle is taken

Picture is sent to national treatment

center

Registration of the car is compared to,

databases of stolen and rented vehicles

Fine is mailed

HOW DOES RADAR DETECT SPEED OF VEHICLES?

It uses electromagnetic or radio waves to

detect speed

It sends radio wave and listen for their return

Dividing the time took the waves to return

and forth by the distance is calculated

Using DOPPLER principle speed is calculated

LIDAR

Light detection and ranging

It does not use DOPPLER EFFECT to

detect the speed

Frequency used by radar is higher

Lidar

FROM THEORY TO PRACTICE

Basic of every speed camera is SHF

generator

Uses frequency between 2ghz to

10ghz

Speed camera consist of Analyser,

Amplifier, Processor, Receiver,

Oscillator, Display

From Theory To Practice

PROBLEM FROM TECHNICAL VIEW POINT

Operating during rain or mist

Measurement range

Reaction time

Continuous transmission

Discrimination

CONCLUSION

Speed camera make our road safer

The protect innocent road users

This camera reduces accidents

Thank you

any?