Response fitting in low-cost radiation sensors
DOI:
https://doi.org/10.24084/repqj08.523Abstract
To obtain low-cost solar radiation sensors with
energy applications, small commercial photovoltaic cells have
been adapted. With the purpose to evaluate the resulting
thermal drifts, a temperature sensor has been connected to a
small electronic circuit. The calibration curve provided by the
cells supplier is not useful in this case because it is made for a
constant 20ºC temperature. Besides, the additional circuit also
affects the results. This work presents not only the design and
implementation of the additional elements, together with the
data acquisition system, but also the results of the calibration
work, the fitting of new incident solar radiation functions
regarding the temperature of the cell and the intensity of the
resulting current, besides the validation of the results for four of
these cells.