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Publicação
Aquisição de Sinais Cardíacos, Musculares e Ambientais para a Análise do Sono
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Orientador(es)
Resumo(s)
O sono é essencial para que o corpo humano possa reparar os tecidos celulares e
consolidar a memória. É essencial dormir entre seis a nove horas por dia sem interrupções.
Os efeitos do sono com pouca qualidade são visíveis nos sinais fisiológicos, sendo o ritmo
cardíaco um dos sinais vitais afetado pela falta de sono. Além disso é possível identificar a
quantidade de horas de sono analisando um ou dois sinais fisiológicos, como por exemplo
os sinais elétricos do coração e dos músculos. O stress por vezes pode afetar a qualidade e
quantidade do sono.
Assim, para adquirir os sinais do coração e dos músculos desenvolveu-se um dispositivo
de aquisição de dados. Teve-se em atenção a escolha dos sensores, de maneira a estes
serem confortáveis e fáceis de utilizar. A partir do sinal cardíaco captado calculou-se a variabilidade
do ritmo cardíaco e o número de batimentos cardíacos por minuto de maneira
a ser possível verificar se estão dentro dos padrões normais e saudáveis. Para identificar
quando os músculos estão contraídos ou descontraídos calculou-se a tensão e potência do
sinal elétrico captado. Além disso existem fatores externos que podem afetar o funcionamento
biológico do corpo humano, como por exemplo a luminosidade ambiente. Assim,
efetuou-se o registo da intensidade da luz.
O dispositivo desenvolvido para este trabalho foi testado em dois indivíduos saudáveis.
Além disso, o valor obtido para o número de batimentos cardíacos por minuto foi
comparado com os resultados apresentados por um relógio de fitness e por um aparelho
de medição de pressão arterial.
Sleep is essential for the human body to be able to repair our cell tissues and to consolidate our memory. It is essential to sleep between six to nine hours without interruptions. The effects of low quality sleep are visible in our physiological signals and the heart rate is one of the vital signals affected by lack of sleep. It’s also possible to measure the quantity of hours of sleep by analysing one or two physiological signals, namely the electrical signals of the heart and the muscles. Sometimes stress can affect the quality and quantity of sleep. Therefore, it was developed a data acquisition device to capture heart’s and muscles’ signals. The sensors were carefully chosen, in order to be comfortable and easy to use. From the cardiac signal captured it was calculated the heart rate variability and the number of heart beats per minute to make it possible to check if the results are within an average and healthy pattern. To identify when the muscles are flexed or relaxed, it was calculated the tension and power of the captured electrical signal. Besides there are external factors that may affect the human’s biological functioning, such as the ambient light. Therefore, the ambient light was also recorded. The device that was developed for this work was tested in two healthy individuals. The number of heart beats per minute was compared with the results presented by a fitness watch and by a device used for blood pressure measurement.
Sleep is essential for the human body to be able to repair our cell tissues and to consolidate our memory. It is essential to sleep between six to nine hours without interruptions. The effects of low quality sleep are visible in our physiological signals and the heart rate is one of the vital signals affected by lack of sleep. It’s also possible to measure the quantity of hours of sleep by analysing one or two physiological signals, namely the electrical signals of the heart and the muscles. Sometimes stress can affect the quality and quantity of sleep. Therefore, it was developed a data acquisition device to capture heart’s and muscles’ signals. The sensors were carefully chosen, in order to be comfortable and easy to use. From the cardiac signal captured it was calculated the heart rate variability and the number of heart beats per minute to make it possible to check if the results are within an average and healthy pattern. To identify when the muscles are flexed or relaxed, it was calculated the tension and power of the captured electrical signal. Besides there are external factors that may affect the human’s biological functioning, such as the ambient light. Therefore, the ambient light was also recorded. The device that was developed for this work was tested in two healthy individuals. The number of heart beats per minute was compared with the results presented by a fitness watch and by a device used for blood pressure measurement.
Descrição
Palavras-chave
sinais fisiológicos sono sinais elétricos do coração sinais elétricos dos músculos dispositivo de aquisição de dados