LITERATURE REVIEW (FYP 1)

JOURNAL 2

DESIGN AND IMPLEMENTATION OF A MICROCONTROLLER BASED AUTOMATIC DOOR AND VISITOR COUNTER

This journal about microcontroller based automatic door control with visitor counter was designed to automatically open a door once somebody approaches the door without the need for any switch, button or handle. Hence, the system also has a module that serves as visitor counter and as such, counts the number of entries in and out of the building. In this design, the door is made to slide open once the sensor picks up a signal implying that somebody is approaching the door. Besides that, the door stays open for few minutes while the microcontroller checks the condition of the sensor. So if the sensor still senses the presence of somebody, the door stays open. Else, the door closes while waiting for the next time to open. The design is with multi-message display using seven segment displays.

In this design the hardware components are solely coordinated by the AT89S51 microcontroller chip while the C programming language is used to program the chip. Moreover, this design perfectly suits a garage system. In this case, the garage door opens once a car approaches the door of the garage.

This project consists of a sensor unit that senses people approaching the door. Besides that, through the output of the sensor, the microcontroller determines when to send the necessary logic to the H-bridge driver so as to control the motor for the door. Which is also the counter is incremented once the sensor receives signal but unlike the door routine that keeps the door open once somebody stands by the sensor, the counter routine does not continue counting if the sensor is continuously receiving signal like the door.

Credit to : Reuban, S. (2014). Desing and Implementation of A Microcontroller Based Automatic Door NAd Visitor Counter.