Módulo de aquisição e condicionamento de sinais provenientes da atividade elétrica exercida pelo globo ocular / Module for the acquisition and conditioning of signals arising from the electrical activity exercised by the eye globe

Abstract

The aim of this work was to carry out a study on the acquisition and conditioning of the electro-oculography signal, a signal of biological origin, emitted by the potential difference between the cornea and the retina. The movement of the eyeball causes a low-intensity signal in the range of microvolts to be generated. This signal goes through some amplification stages and is launched on a platform to verify the incoming analog data. The system is composed of easily accessible materials, containing the basics to carry out the acquisition of the oculography signal, for the assembly it was necessary to use electrodes (standard ECG), connection cables that will be plugged into the electrodes, an acquisition system and pre-amplification, the AD620 module was used, it was also necessary another amplification stage in this case an INA121 integrated circuit was used, the amplified signal is directed to the arduino board responsible for the processing of analog and digital data. Given the proposal, to be able to apply the technique in the future to some existing equipment, such as a wheelchair, hospital beds, among others.