Implementação de software para total sky imager

Abstract

This work presents the development and implementation of an application in the Android operating system for Total Sky Imager. Commercial equipment has a high cost so that its acquisition by the IFPE campus Pesqueira is unfeasible. This research is part of the project entitled "Development and application of technologies for monitoring and control of photovoltaic energy plants - Total Sky Imager (TSI)" which is under development at the IFPE campus Pesqueira. TSI analyzes images of the sky, resulting in an estimate or prediction of solar irradiance, which are relevant information for the generation of photovoltaic solar energy. The model under development at IFPE is based on low cost. In this work, methods of (i) image acquisition were implemented in Android, performing captures automatically, extracting metadata and storing the information in a database; (ii) removal of the distortion generated by a fisheye lens through a new algorithm developed in this work, which resulted in a 46.5% reduction in the processing time of this step in relation to the original reference algorithm; and, (iii) segmentation, distinguishing the pixels between sky, light clouds and dark clouds. The remaining stages of the project, necessary for the completion of the TSI, are part of other work plans in progress.