基于STM32和小波自适应滤波算法的生理参数监测系统的研究  

Study on Physiological Parameter Monitoring System Based on STM32 and Wavelet Adaptive Filtering Algorithm

作　　者：魏路明 佘世刚 邵笑校 武格盈 裴海珊 WEI Luming;SHE Shigang;SHAO Xiaoxiao;WU Geying;PEI Haishan(School of Mechanical Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学机械工程学院,江苏常州213164

出　　处：《计算机测量与控制》2023年第2期76-82,90,共8页Computer Measurement &Control

摘　　要：针对心血管疾病的高死亡率以及人口老龄化的现象,文章开发了基于STM32单片机和小波自适应阈值滤波算法的可穿戴式健康监测系统;系统可分为系统微处理器、数字系统模块、人机交互模块、信号采集模块和无线通信模块等几个部分,针对人体的心率、血氧、体温等重要生理参数进行处理分析,进而对人体实时监护;系统处理器选取STM32F103C8T6作为控制芯片,显示模块选用了OLED;生理参数采集系统选用了MAX30102传感器和Pulse sense传感器分别对人体腕部和指尖心率进行采集;生理参数采集完毕后,通过进一步的A/D转化,基于提出的一种改进小波自适应阈值滤波算法降噪滤波,从而将人体的生理特征参数记录下来;再将采集的生理数据通过蓝牙传输至手机端,其中的ZigBee模块主要是把获得的数据再次输送到远程控制端内,让患者能够远程得到更好的医疗监控;该系统通过软件与硬件相结合的方式;最后通过对比论证其中心率(BPM)结果误差为2 BPM,血氧含量监测结果误差在2%以内。In view of the phenomenon of high mortality rate in cardiovascular disease and population aging,a wearable health monitoring system is developed on the basis of STM32 microcontroller and wavelet adaptive threshold filtering algorithm.The system can be divided into several parts,such as system microprocessor,digital system module,human-computer interaction module,signal acquisition module and wireless communication module,process and analyze the important physiological parameters such as human heart rate,blood oxygen,and body temperature,and then monitor the human body in real time.The system processor selects STM32F103C8T6 as the control chip,and the display module as organic light-emitting diode(OLED).The physiological parameter acquisition system uses MAX30102 sensor and pulse sense sensor to collect the heart rate of the human wrist and fingertip,respectively.After the physiological parameters are collected,the physiological characteristics of the human body are recorded by the A/D conversion,the noise filtering based on the improved wavelet adaptive threshold filtering algorithm is reduced.Then the collected data is transmitted to the mobile phone through Bluetooth,and the ZigBee module mainly transmits the obtained data to the remote terminal again,so that patients can get better medical monitoring remotely.The system is combined with the software and hardware.Finally,the error of the center rate is 2 beat per minute(BPM),and the error of the blood oxygen content monitoring result reaches within 2%.

关 键 词：医疗监护 小波变化 自适应滤波 生理参数多点监测 数据采集 

分 类 号：TM912[电气工程—电力电子与电力传动]