基于AFE4490的无创血氧检测系统设计

Design of non-invasive blood oxygen detection system based on AFE4490

文章以STM32F103VET6作为核心处理器,结合TI公司高性能集成血氧采集芯片AFE4490。硬件设计方面,简化了电路设计、降低功耗、缩小了电路尺寸。通过Fluke Index 2血氧模拟仪采集大量数据进行分析预处理,在滤波方面采用基于小波软(硬)阈值去除噪声方法,取得了不错的效果。利用无创检测血氧饱和度原理计算得到SpO2的百分比。

This article uses STM32F103VET6 as the core processor, combined with TI’s high-performance integrated blood oxygen acquisition chip AFE4490. Hardware design simplifes circuit design, reduces power consumption, and reduces circuit size. The Fluke Index 2 blood oxygen simulator collects a large amount of data for analysis and pretreatment, and uses fltering based on wavelet soft（hard）threshold to remove noise, and has achieved good results.The percentage of SpO2 calculated by using the principle of noninvasive measurement of blood oxygen saturation.