| Resumo: | The emergence of the COVID-19 pandemic has accentuated and mediated the interest and importance of devices that allow for continuously measuring vital signs. Heart rate, SpO₂, blood pressure, and temperature are among the most important vital signs to measure daily. This project aims to measure these vital signs, in a non-invasive, in order to create a suitable system for a ring-shaped device. For this, vital signs were carefully studied, various types of sensors were studied, and detection and estimation algorithms were implemented. The results show that the acquisition of Heart Rate, SpO₂ and Temperature was performed successfully, obtaining good accuracy in the reading of these vital signs. Blood pressure, however, was not fully reached, with the values obtained presenting high errors. The work presented in this dissertation shows that it is possible to successfully read the proposed vital signs, but also that some improvements can be made in order to obtain a more robust system.
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