Shaza

Ultrasonic Range Meter

Senior Project

Submitted to the Department of Computer and Communication

Engineering

American University College of Science and Technology

In Partial Fulfillment of

the Requirements for the Degree of Bachelor of Science

In

Computer and Communication Engineering

Maroun Daher

Rami Freih

Gaby Al Jawabira

August 2006

Abstract

The Ultrasonic Range Meter is an efficient way to measure the distance of unreachable obstacles. It is based on sending sound waves through a specific medium and observing the returning echoes to measure the distance from the device to the obstacle.

The device is divided into three parts, transmitter, receiver and the microcontroller. The transmitter consists of an electronics circuitry which generates electrical signal .In addition, an electromechanical transducer to convert electrical signal to physical form to drive through the medium, which is air. The receiver also consists of an electronics circuitry which detects the echoes bounced back from the obstacles. The microcontroller is programmed for selectivity sequence and to calculate the time of flight of the signal to find the distance and display it.

The system architecture of the Ultrasonic Range Meter was built to be cheaper, requires less power and delivers better performance. It can be reconfigured to adapt to a variety of pulsed Ultrasonic systems.

Table of Contents

Chapter 1 Introduction 1

1.1 History of ultrasonic waves....................................................1

1.2 History of ultrasonic applications...........................................3

1.3 Future development of this technology...................................6

Chapter 2 Problem statement...