Análise de presença em ambientes internos utilizando Arduino e sensor por radar

Abstract

The identification of human presence in indoor environments is a relevant factor for the efficient management of resources in academic spaces, especially with regard to the rational use of energy and the optimization of operational routines.In this context, this work proposes the development and evaluation of an embedded system for presence monitoring in classrooms, using an Arduino Uno microcontroller integrated with a radar-based motion sensor and a Data Logger module with a microSD card for storing date and time records of detections. The adopted methodology involved surveying the requirements together with the staff of the gatehouse of the Russas Campus of the Federal University of Ceará, the development of the electronic prototype, the initial simulation of the system in a virtual environment, and subsequently the physical implementation and testing in a real classroom during three days of data collection. The recorded data were analyzed with the aim of identifying movement patterns throughout the scheduled class hours, allowing a comparison between actual occupancy and planned occupancy.The results demonstrated that the system is capable of identifying periods of effective occupancy, as well as situations of false occupancy, in which the environment is considered occupied even in the absence of people. Based on the analysis of the observed patterns, it was possible to propose an intelligent control strategy for the activation and deactivation of air-conditioning units, aiming to reduce energy waste. Thus, this work contributes to the development of monitoring solutions applied to indoor environments and presents potential for future integration with building automation systems and smart campus initiatives.