基于CC2530和NJL5501R的一种新型反射式血氧模块的设计

A design of new reflection-type blood oxygen module based on CC2530 and NJL5501R

目的:基于新型传感器开发一种反射式可无线传输的血氧监测模块,作为可穿戴设备的终端监测节点。方法:利用朗伯比尔定律对血氧算法进行数学分析,在硬件上设计终端的原理图,并对传感器NJL5501R驱动电路、跨阻放大器以及滤波电路进行分析设计;在软件上描述软件流程和算法实现,以福禄克INDEX2XLF模拟血氧饱和度确定Q值,产生Q值和血氧的对应图。结果:血氧监测模块实现了血氧数据的采集和无线传输,实测血氧数值与使用迈瑞i PM10型患者监护仪测量当前血氧值进行对比分析,其误差<2%。结论:反射式血氧监测模块可实现预期功能,但在抗运动干扰、小型化设计以及低功耗上仍有提升空间,尚需进一步研究。

Objective： To develop a reflection-type blood oxygen monitor module can transmit message by a new wireless sensor and be used as a terminal monitoring node in wearable devices. Methods： The blood oxygen algorithm is mathematically analyzed by Lambert Beer law; the terminal schematic diagram of hardware, drive circuit, transimpedance amplifier and filter circuit of sensor NJL5501 R are analyzed and designed to use in the module; the software process and algorithm implementation is described by special software; the Fluke INDEX2 XLF is used to simulate blood oxygen saturation and determine the Q value and thento establish relevant relationship between blood oxygen saturation and Q value. Results： The module can collect blood oxygen data and transmit them by wireless method. And detection result error was less than 2% when this module was compared with the MINDRAY IPM10. Conclusion： The module achieves the expected effect although it still need be improved in some aspects, such as anti movement interference, miniaturization design and low power consumption.