心音、脉搏信号采集、调理电路的设计

心音、脉搏是人体生理及病理的两项重要指标,针对这些信号一般比较微弱、且采集过程中也容易受外界干扰等特点,设计开发了一种能提取微弱心音、脉搏信号的电路。该电路采用驻极体话筒和红外光电法提取心音和脉搏信号,并采取了一系列放大、滤波措施,滤除噪声干扰。该电路较好地解决了外界干扰问题,具有采集数据准确可靠,噪声小,成本低等优点。

Design of Circuit for Collecting and Conditioning the Heart Sound and Pulse Signals

Heart sound and pulse are the most important indexes of the human physiology and pathology.As the heart sound and pulse signals are always weak and can be easily disturbed by outside noise when collection,a circuit which can extract the weak heart sound and pulse signals are developed according to these characteristics.The electret condenser microphone and infrared photo-electrical technique are adopted in the circuit to extract the weak heart sound and pulse signals.It also takes a series of amplifying and...