中文摘要：

反射式血氧仪可以有效避免使用范围受限,但反射式脉搏血氧信号十分微弱,容易受噪声干扰使血氧参数的提取难度加大。为获得高质量有效的反射式容积脉搏波,系统设计中提出一种基于集成芯片AFE4490的脉搏血氧信号检测方案,对比几种基于小波变换的滤波算法去噪效果,完成对血氧信号较优的去噪处理。系统样机经调试后,基本实现反射方式对脉搏血氧饱和度的检测功能。

英文摘要：

Reflective oximeter can avoid the limitation of application. Reflective pulse signal is so weak that it is interfered by noise easily, which increases the difficulty of extracting blood oxygen saturation. A pulse blood oxygen detection method based on integrated chip AFE4490 is proposed in this paper to obtain high- quality and effective pulse wave signals. The denoising effects of several filter algorithms based on wavelet are compared, achieving the optimal denosing for blood oxygen signal.After debugging and calibrating the system, the system realizes the function of blood oxygen saturation detection based on reflection method.