Security System Using Ultrasound

A Security System Using Ultrasound has been proposed in this project. This project was implemented for a low cost security system. In this project the ultrasonic sensors were used to detect the moving object in small place. An ultrasonic transmitter was used which generated and transmitted a 40 KHz signal and an ultrasonic receiver was used which received this transmitted signal which is reflected from any object. A two stage amplifier and a comparator were used to amplify the received weak signal and compare with a reference voltage (5.5V). The comparator s output (High or Low) was fed to a microcontroller which decided whether to start alarm or not respectively. A buzzer was used to generate an alarm. We tested our project and successfully detected the object within 3 feet. The success rate was above 80%. With proper installation this Security System Using Ultrasound can be used where security break warning is needed.

Autorentext

Tasnuva Ahmed is working as Lecturer in Computer Science and Information Technology department at Southern University Bangladesh, Chittagong. She was graduated from International Islamic University Chittagong (IIUC) in Computer Science and Engineering. She had her Master from Institute of Information Technology, Dhaka University.