Desenvolvimento de Nó Sensor para Monitoramento de Vibrações com IoT
AbstractRisk areas such as slopes, dams, bridges, and buildings are susceptible to damage due to the presence of vibrations generated by earthquakes, winds, explosions, heavy traffic,and traffic of heavy vehicles. For this reason, the presence and levels of vibration in these areas should be monitored. This article describes the development of a sensor node with Low Power Wide Area Network communication interface for monitoring vibrations in hazardous areas. As main requirements, a low-cost microelectromechanical accelerometer and a long-range and low-power data processing and transmission platform were selected. The Internet of Things infrastructure uses a MultiTech Conduit gateway, the Loriot network server, and the Cayenne application platform. Tests with a metallic structure and a bi-supported steel beam showed that the sensor node developed has potential for use in applications for monitoring hazardous areas,as it presented a sampling rate compatible with applications in dams, slopes and analysis of the integrity of structures. In addition, the system was able to detect the natural frequencies of the first three vibration modes in the steel beam test.