Design and Development of an Automatic Visitor Entry and Exit Counting System Using Dual PIR Sensors

Abstract

This study aims to design and build an automated visitor counting system based on the Arduino Uno microcontroller, utilizing Passive Infrared (PIR) sensors for motion detection. The system employs two PIR sensors installed at the entrance and exit to detect the direction of visitor movement, thereby enabling the real-time differentiation of incoming and outgoing individuals. Data is processed by the microcontroller and displayed on an LCD screen, which serves as the primary information interface, while LED indicators signal the room's occupancy status. The research methodology encompasses hardware design, mechanical design, system implementation, and performance testing. Test results demonstrate that the system operates with a success rate of approximately 90% in accurately detecting and counting visitors. PIR sensor performance is influenced by distance and environmental conditions, with detection accuracy decreasing as the distance to the object increases. Consequently, the developed system offers an efficient, real-time, and automated solution for monitoring visitor numbers in various public space applications.