BIJESH.M.AS6 ELRoll No:11REG NO:11040915

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AUTOMATIC VEHICLE LOCATOR USING GPS

CONTENTSIntroductionWhat is AVL ?Components of AVL SystemsWhat is GPS & how it works?Working of AVL SystemsUsesApplication of AVLFlaws in the systemConclusionReference

IntroductionAutomatic Vehicle Locator (AVL) is a computer –based vehicle tracking system.

The actual real –time position of each vehicle is determined and relayed to a control center.

AVL systems include: computer -aided dispatch software, mobile data terminals, emergency alarms, and digital communications

Automatic Vehicle Locator (AVL) What is AVL ?

An automatic vehicle locator (AVL) is a device that makes use of the Global Positioning System (GPS) and enables to remotely track the location of a vehicle. It is an important tool which identifies a vehicle with regard to its geographic position, speed and heading.

AVL System

AVL TECHNOLOGY

Components of AVL systems1)

•Radio Receiver

2)

•GPS Receiver

3)

•GPS Modem

4)

•Antenna

5)

•GPS Base Station

6)

•Wireless Communication

7)

•GPS Tracking Software

8)

•Data Stream Processing Servers

What is GPS?The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites.

How GPS works?

Triangulation:

Collecting of signals from three or more satellites in carefully monitored orbit from which the receiver computes its own spatial relationship to each satellite to determine its position.

Working of Automatic Vehicle Locator

Working of AVL system1) The satellites are synchronized to emit encoded navigational information (exact positioning and exact time).

2) Any vehicle equipped with a GPS receiver will intercept these transmissions.

3) Using a simple mathematical formula derived from triangulation, the receiver is able to calculate its own longitude, latitude, velocity and even altitude.

4) Then this information is transmitted to a central dispatch center.

GPS Satellite GPS Receiver

Radio System GPS Antenna

MAPPING

Maps allow understandable view of vehicles location and will also allow operators to apply local knowledge.

Vehicle location display in real-

time.

Recording of arrival and

departure times (proof of delivery

etc).

Monitoring of driving practices

(speed).

Alerts if vehicle leaves or enters

a defined area.

Uses

In MilitaryTrack AnythingIn Cargo

In cargo

Applications Of AVL

Flaws in the system•Ionosphere and troposphere delays - The satellite signal slows as it passes through the atmosphere.

•Signal multipath - The GPS signal is reflected off objects such as tall buildings before it reaches the receiver, thus increasing the travel time of the signal.

•Receiver clock errors - A receiver's built-in clock is not as accurate as the atomic clocks onboard the GPS satellites.

• User compulsory needs a computer to access lost vehicle information

•By using GPS we can track the location of the vehicle

•It is a cost effective and efficient technique

•It gives protection to the vehicles and also the accident alerts

Conclusion

Reference

www.vehiclelocationsystem.comwww.gpstracker.ph/techwww.pocketgpsworld.comwww.seminarsonly.com

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