一种低功耗脉搏血氧饱和度测量系统的设计

Development of a low-power pulse oximeter system

能快速、准确、连续监测人体动脉血氧饱和度和脉率的测量设备对人体呼吸系统和循环系统疾病临床诊断和监护具有重要作用。为了实现一种低功耗、低成本的脉搏血氧测量系统,设计了一种以Lambert-Bear定律为理论基础,对脉搏血氧信号进行实时采集、处理、显示,并通过蓝牙4.0传输数据给手机实时显示的脉搏血氧饱和度测量系统。系统可无创伤连续测量,成本低,实现容易,并能较好地克服基线漂移和工频噪声干扰。结果表明,该系统功耗低,所测量的脉搏波波形清晰可见,血氧饱和度值和脉率值准确可用,具备商用便携式产品性能;同时提高了系统的可穿戴特性,可应用于移动环境中,实现无处不在的生理测量及监控。

Continuous,non-invasive and accurate monitoring of the human arterial oxygen saturation and pulse rate is very important for clinical diagnosis and monitoring of respiratory and circulatory system.In order to implement a low-power,high precision and low-cost pulse oximeter,a novel system for pulse rate and blood oxygen saturation measurement circuit based on Lambert Bear＇s law is presented in this paper.This system is economical,easy to implement and can effectively reduce power line interference and baseline drift.By virtue of this apparatus,the pulse rate and SpO2 value can be calculated and monitored in real-time on the smart phone through Bluetooth 4.0.The results show that this pulse oximeter runs well and this solution has the characteristics of low power consumption,accuracy and low cost compared with commercial devices,which could realize real-time,low cost and ubiquitous health-care in daily life.