Sensores de sujidade em superfícies utilizando fotoresistores e capacitores interdigitados com aplicação em painéis solares

Abstract

The photovoltaic solar system is a technology that uses solar cells to convert solar light energy into electrical energy through the photovoltaic effect. It is important to consider local weather and environmental conditions in the installation of photovoltaic panels, as they can influence energy generation. Dirt accumulation is an environmental factor that can significantly affect the efficiency of photovoltaic panels. Therefore, this study has developed resistive and capacitive sensors for dirt detection on surfaces. The resistive sensor is based on a Light Dependent Resistor (LDR) with resistance dependent on the intensity of visible light. The capacitive sensor is based on interdigitated capacitors with capacitance dependent on the material deposited on the surface. The sensor prototypes were assembled and tested, comparing their dirt detection characteristics. The test results indicate that the sensors and the electronic circuits are suitable for use in dirt monitoring systems. The selection of the best LDR and capacitor models was carried out during the project, and both sensors showed to be suitable for dirt monitoring applications.