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Heart sounds and pulse two important indicators reflect physiological and pathological , they are one of the important means of diagnosis of the disease in humans , has a very important clinical significance . To this end , the research background , research status and development trends in the field of this article conducted a full investigation , that the existing system is generally separate heart sound acquisition system or pulse acquisition system , can not be associated analysis of heart sounds and pulse signal , and therefore proposed pulse signal acquisition system based on SCM heart sounds , vision, and successful heart sounds , pulse signal acquisition system design . This study is mainly reflected in the following aspects : ( 1 ) heart sound system the Master circuit design (A / D conversion , RAM expansion , serial communication circuit the pulse sensor selection ( 2 ) signal conditioning circuit design ( 3) ) (4 ) PC side application software design
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