Chapter One

Introduction

1.1 Background

          Nowadays, population is more increasing in megacities all over the world because of large density population, public areas. These places have many difficulties to use the manual doors. The manual doors are often convenient because they are too hard to push open, especially with full hands or while pushing a stroller. Therefore the face the problems of scare to install the doors to be save and easier more convenience access than manual doors.

          And then by using the door sliding system, it can reduce the human labor and wages time to spend door in and out because of converted from manual system to automatic system. Automatic sliding doors have flat panels that slide horizontally and linearly, with a variety of configurations.

          The automatic door sliding system consists of sensing system, main controller circuit and motor. Today, the field of microcontrollers is in the beginnings of the development of integrated circuit technology. Micro-controllers are the most widespread, varied, flexible electronic control devices. The number of applications is vast and increasing daily. This approach is to modulate a design that uses a raspberry pi microcontroller to control the Stepper motor for automatic sliding door. There are three main facts to control a motor, speed, direction, and position. The commonly electrical motor used in motion control system. Sometimes the direction of rotation needs to be changed. H-bridge circuit (L293D) can be used.

          The project “Automatic Door Opening and Closing” using raspberry pi 3 microcontroller is an exclusive project which is used to control door using PIR motion detector. In addition, a surveillance camera is used near the gate, moving at a free angle to the right and north. And LCD to display the number of people passing through this section, design of security system for access control by surveillance cameras.