Desenvolvimento de um sensor digital de umidade do solo e unidade remota de monitoramento utilizando comunicação sem fio

Abstract

Engineering solutions are increasingly employed in agriculture, especially in process automation and improvement of existing techniques. Thus, this work presents the development of a digital sensor soil moisture with remote monitoring. This sensor comprises a probe composed of printed circuit board that emit electromagnetic waves of high frequency to obtain responses from the electrical conductivity and capacitance to ground. These responses are sent via radio module up to a distance of 100 meters to a drive control and monitoring. With the results obtained by the sensors can identify the time of irrigation, allowing different treatments over the same production area. The results showed that the sensor output voltage has a correlation with the soil moisture content, presenting a coefficient of 0.988. The consistency and stability of soil moisture sensor has met the monitoring requirements of the moisture away. It is expected that the constant monitoring of soil properties provide a more effective control on the use of water, to reduce their consumption, but without harming the growth of plants.