血氧饱和度检测仪是一种可对动脉血氧饱和度进行实时检测的医学检测仪器。文章详细介绍了基于Beer-Lambert定律的非侵入式脉搏血氧检测系统的工作原理。以MSP430F149为核心,配以Nellcor DS-100A型脉搏血氧探头、LCD模块等,给出了数字脉搏血氧检测系统的设计方案,设计了血氧饱和度检测仪。该检测仪实现了血氧饱和度和脉率的实时检测功能。系统运用IIR和FIR数字滤波器抑制系统噪声信号干扰,提高了检测的的稳定性和可靠性。由于MSP430F149单片机超低功耗的特点,极大地降低了系统运行时的功耗。%Pulsoximeter is a medical testing equipment in real-time monitoring the pulse blood oxygen saturation.In this paper,the principle of non-invasive pulse oximeter detection,based on the Beer-Lambert Law,are presented in detail.The design uses the MSP430F149 MCU as the core,with the Nellcor DS-100A pulse oximeter sensor,LCD modules,making the instrument has the function of real-time monitoring and displays the pulse blood oxygen saturation and the pulse rate.The use of IIR and FIR digital filters suppress noise interference and improve the stability and reliability testing.Using the ultra-low power consumption micro-controller MSP430F149,the design greatly reduces the power consumption when the system is running.
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