Desenvolvimento de sistema de medição de frequência e interface móvel para equipamento de fisioterapia respiratória

Abstract

This dissertation presents the preliminary results of the design of a digital frequency meter that was modeled to detect as oscillatory vibrations of a respiratory physiotherapy equipment. Therefore, the proposed circuits and systems have or provide visual feedback to the patient, such as breath strength advice, for improvement or treatment. A Hall Linear effect sensor has been coupled to a physical therapy equipment, and the output signal is conditioned through a set of filters. The Fast Fourier Transform of this signal is then used to extract information in the reproduction frequency domain, finally real time duration for patients.