Estudo de sensores de baixo custo para medição da radiação de uma fonte luminosa

Abstract

The replacement of fossil fuels by renewable energy sources is a world priority, especially due to the increase in the level of greenhouse gases in the atmosphere, causing global warming. Solar energy is the most abundant energy resource on the planet, and the conversion of solar radiation into electricity through photovoltaic panels has grown considerably in recent decades. The measurement of solar radiation can be done through the use of pyranometers, which are precise instruments, but expensive. In this work, low cost sensors for measuring light radiation were studied. The responses of an LDR (Light Dependent Resistor) sensor and a phototransistor to the illuminance of an incandescent lamp were analyzed, finding characteristic equations for calibration. The work showed the feasibility of using these sensors to measure light radiation, especially in applications where high-precision measurements are not required.