血氧信号采集与处理方法研究

摘要

详细分析了脉搏血氧检测中信号的前置放大和数据后处理中应注意的问题以及采取的措施,以STM32单片机为核心处理器,采用光的调制和解调技术.在硬件上,完成了低功耗、强抗干扰的血氧信号前置放大电路的设计；在软件上,完成了低通数字滤波器的设计,并把此前置放大电路和数据处理方法应用于脉搏血氧状态的测量,得到了连续、稳定的脉搏血氧信号.%The problems needing and actions of pre-amplifier and data post processing for blood oxygen detection pulse signal are detailedly analyzed. Through STM32 as core processor,the technique of the modulated and demodulated light is used. In hardware, the design of pre-amplifier for low power and strong anti-interference is accomplished; in software,the design of low-pass digital filter is accomplished,and the pre-amplifier and data post processing method are applied to measure the state of blood oxygen, can receive Continuous, stability of the pulse of the blood oxygen signal.