Design And Construction Of Intruder Detector Alarm System With Direction/location Display

1.2 General description   

This project work is designed to be a costless security system that can be used to secure different locations against unwanted entries using seven segment displays which can display the location and direction of an intruder in an unauthorized environment, as on such intrusion, an alarm rings and the person monitoring the system can trace such a position. Its design is made possible using components that are available in the market which mainly include Buzzer, LED, Voltage Regulator, LM 324(Op-Amp), BCD Counter 7490, Seven Segment Driver 7447, Seven Segment Display. The inputs are opto-couplers configured with laser diodes and light Dependent Resistor (LDR) which act as the electronic eyes installed at the sensory points. The control unit is made up of one short delay circuit, audio frequency generator, priority encoder and decoder, piezo-buzzer and single digit seven segment display. The system is packaged in a well-furnished wooden material. In a case of simultaneous intrusion, the display shows the location with the highest priority, and the system is powered from a mains supply. 

1.3 Aim and objectives 

This project is aimed at designing and subsequently constructing a Direction/Location Display system capable of detecting intrusion at any location, as it will prompt an alarm to ring and using seven segment displays the exact location can be traced. 

The following are the systems objectives; 

1. Ensure the security of an environment where it is installed.

2. Ensure prompt notice through the alarm system of an intruder into an unauthorized premise. 

3. Provide psychological satisfaction of being secure to the office occupant. 

1.4 Project significance  

The significance of this project is to be able to design and construct a security alarm system that is cheap and can be used to monitor motion, in order to prevent unwanted persons from entering an unwanted area in a specific location.   

1.5 Scope of the study

This study is focused at ensuring the security of an environment as the device in a box is installed at a part of a building.