Design and Implementation of Heart Sound Detection Device Based on MEMS MIC / 中国医疗器械杂志
Chinese Journal of Medical Instrumentation
;
(6): 337-340, 2019.
Artigo
em Chinês
| WPRIM
| ID: wpr-772491
ABSTRACT
The paper describes how to develop a digital heart sound signal detection device based on high gain MEMS MIC that can accurately collect and store human heart sounds. According to the method of collecting heart sound signal by traditional stethoscope, the system improves the traditional stethoscope, and a composite probe equipped with a MEMS microphone sensor is designed. The MEMS microphone sensor converts the sound pressure signal into a voltage signal, and then amplifies, converts with Sigma Delta, extracts and filters the collected signal. After the heart sound signal is uploaded to the PC, the Empirical Mode Decomposition (EMD) is carried out to reconstruct the signal, and then the Independent Component Analysis (ICA) method is used for blind source separation and finally the heart rate is calculated by autocorrelation analysis. At the end of the paper, a preliminary comparative analysis of the performance of the system was carried out, and the accuracy of the heart sound signal was verified.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Processamento de Sinais Assistido por Computador
/
Ruídos Cardíacos
/
Estetoscópios
/
Sistemas Microeletromecânicos
/
Coração
Tipo de estudo:
Estudo diagnóstico
Limite:
Humanos
Idioma:
Chinês
Revista:
Chinese Journal of Medical Instrumentation
Ano de publicação:
2019
Tipo de documento:
Artigo
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