This document discusses an alarm and anti-theft system for vehicles. The system uses infrared sensors that detect movement and send signals to a control unit, which then activates an alarm siren. There are two main types of alarms: audible alarms using sirens and visual alarms using hazard lights or headlights. The main function of the system is protection against vehicle theft by providing audible or visual warning signals when sensors detect movement near the vehicle. Anti-theft systems can also use technologies like GPS and GSM networks to track vehicles. Key components include infrared receivers, inclination sensors, and alarm signal sirens.

3. ALARM AND ANTI-THEFT SYSTEM

4. SPECIFIC OBJECTIVES:
• Explain the working principle of alarm and anti-theft system
• Demonstrate the function of alarm and anti-theft system.
• Define the label of components of alarm and anti-theft system.

5. WORKING PRINCIPLE
This system is used infrared signal. When
one of the sensors is tripped, it sends a
signal to the control unit. The control unit
then activates the alarm siren, which will
call attention to the vehicles. The sensors
are connected to different parts of the
vehicle.

6. ALARM TYPES
1) Audible alarm : via a separate alarm siren with inte-grated power supply .
2) Visual alarm : via the hazard warning system the interior lighting or the dipped beam
headlamps.

7. EXERCISE 1

8. ANSWERS-1
Q1) Explain the working principle of anti-theft alarm system?
the sensor will send a signal to the controller, indicating vibration intensity. According to
the intensity of the vibration, the controller will issue a warning beep or full sounding the
alarm
Q2) How many types of the alarm?
• Audible alarm
• Visual alarm

9. FUNCTION
The main function of alarm and anti-theft is protection against vehicle theft. Audible
and visual warning signals attract .

10. TYPES OF ANTI THEFT SYSTEMS
• 1. GSM Technology Based Vehicle Theft Intimation to the Owner On Cell Phone
• 2. Vehicle tracking by GPS – GSM
• 3. Microcontroller Based Anti-theft Security System Using GSM Networks with
Text Message as Feedback

11. COMPONENTS OF SYSTEM

12. IR RECEIVER

13. INCLINATION SENSOR

14. ALARM SIGNAL SIREN

15. EXERCISE-2

16. ANSWERS-2
Q1) What is the function of anti-theft alarm system?
it is protection against vehicle theft. sound or visual warning signal .
Q2) what does GSM mean?
GSM = Global System for Mobile Communications.
Q3) How does inclination sensor works?

18. Thank
you