ILDA: Identificação de Lâmpadas Defeituosas em Aeroportos

Abstract

The proposed Final Project has as main goal the development of an identification system of defective lamps of an airport runway. The project was developed during an internship at a German company. Through analysis of the voltage and current signals proceeding from the runway’s signalization circuits, the measurement of the phase difference between both signals was chosen as the failure detection method and the Goertzel algorithm would be used to measure the desired delay. The project was developed on a previously designed circuit board, which belongs to the company, and comprehend the reception of the analog signals from up to eight different circuits, their conditioning and multiplexation in order to use only two analog inputs of the dsPIC33F family microcontroller. The communication with the other equipments of the company is held through the I²C protocol and an interpolation algorithm was programmed, so the amount of broken lamps could be estimated using data of two previously calibrated states. The development was accomplished in a six-month schedule in Mannheim, Germany, totalizing 936 work hours.