Avaliação prática de um protótipo medidor de temperatura e umidade relativa para sementes armazenadas em big bag

Abstract

Each year there is a linear increase in the production of grains and seeds. However, the static storage capacity does not keep up with this production. Due to this deficit, cooperatives, processing units, warehouses, choose to pack the products in “big bags”, or bag silos, which has the advantage of greater termal insulation of the product in relation to environmental conditions, internal and external. In this sense, the objective of this work is to elaborate a prototype capable of measuring the variables of temperature and humidity of seeds, inside "big bags". After elaborating the prototype, it was tested in three prototypes of "big bags", containing a soybean cultivar (Garra) and two rice cultivars (BRS Pampa CL and Irga 424). The seeds were conditioned for a month, and after this period, their moisture and temperature were measured, and compared to na apparatus that uses the method through the dielectric constant of the grains. From the results obtained, it is concluded that the prototype proved to be eficiente in measuring the temperature and relative humidity of the air, however, due to lack of calibration and insertion of the equilibrium moisture content equation in its programming, it was not able to perform such reading directly.