介绍了基于MSP430FG439的脉搏血氧仅设计与实现.通过对系统需求的分析,完成了血氧仪所需的信号采集、信号处理部分硬件设计,搭建了以MSP430为核心的具有多功能血氧检测模块.该血氧仪的特点:采用一个外围探头结合MSP430 MCU进行信号采集和处理;具有良好的人机界面,可在OLED屏上实时显示心跳脉动波形和人体血氧含量;具有检测手指是否夹入和根据心率和血氧进行报警;集成基于文件系统的SDHC存储卡,可以将运行参数实时记录存储.经过该血氧仪的设计流程,可以进行有关电力电子以及嵌入式开发等一系列的实验设计.%This paper introduces the design and implementation of pulse oximetry based on MSP430FG439.Based on the analysis of the system requirements,the signal acquisition and signal processing hardware design of the oximeter are completed.The multi-functional blood oxygen detection module with MSP430 as the core is set up.The oximeter has features:a peripheral probe combined with MSP430 MCU is used to signal acquisition and processing;has a good manmachine interface,real-timely displays the OLED screen pulse waveform and human blood oxygen heart rate;and detects of finger clip.And according to heart rate and blood oxygen alarm which are integrated by file system-based SDHC memory card,one can run the real-time recording and storage parameters.The design of the oxygen meter can be carried out on the power electronics and embedded experiment design.
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