基于LabVIEW的脉搏波分析监测系统

李姝颖　魏安海　张和华　尹军

[摘 要] 设计一种基于LabVIEW的脉搏波分析监测系统，能够自动、高效、精确地实时采集和记录人体脉搏参数。监测系统采用下位机和上位机方案，以单片机为核心测量人体脉搏。该系统采用脉搏传感器将所采集的信号进行放大、滤波、电压抬升等处理，通过CH341T与PC端USB接口相连，实现了单片机和上位机之间通讯并将处理后的数据传至上位机进行分析。上位机基于LabVIEW开发平台实现了用户管理登陆、脉搏波滤波、消除基线漂移、特征识别、打印报告等功能，其特征参数可有效地反映身体功能。

[关键词] 脉搏波；用户管理；消除基线漂移；特征参数

中图分类号：R331 文献标识码：A 文章编号：2095-5200（2017）01-015-04

DOI：10.11876/mimt201701007

Pulse Wave Monitoring System Based on LabVIEW LI Shuying，Wei Anhai，Zhang Hehua，YIN Jun. （Medical Engineering Department， Daping Hospital and Institute of Surgery Research，Third Military Medical University， Chongqing， 400042）

[Abstract] A pulse wave monitoring system based on LabVIEW was designed which can automatically， efficiently and accurately real-time collect and record human pulse parameters .With a single chip processor as the core， the system used a lower computer and a upper computer to measure the pulse of human body. The system could magnify， filter analog signal and rise the voltage through the pulse sensor. It realized the communication between the MCU and the PC through a CH341T chip connecting with the PCs USB interface. The processed data could be transmitted to the upper computer for analysis. The upper machine based on LabVIEW could realizes user login management， pulse wave filtering， eliminating baseline drift， feature recognition and print of reports， etc.The characteristic parameters could effectively reflect and feedback the patients physical features and functions.

[Key words] pulse wave； user management； eliminating baseline drift； characteristic parameter

0 引言

脈搏波信号是身体生理状况的重要信号之一，其特征参数可有效地反映身体的各项指标和功能。脉搏波是心脏搏动（振动）产生的波沿动脉血管和血流向外周传播而形成，除了受到心脏本身影响外[1]，还受到流经各级动脉及分支中各种生理因素影响，如动脉的弹性、血液黏性、血液密度性和血管阻力等[2-4]，使得脉搏波中包含有极丰富的心血管系统生理和病理特征[4-5]，通过对脉搏波信号波形、波幅、速率和节律等方面分析可以有效地估算出心输出量、血管阻力、血管壁弹性和血液黏性等。但是脉搏波信号随机性强、信噪比低且在采集过程中易受到工频干扰，因呼吸及和皮肤接触时压力不同而产生基线漂移会对信号识别和分析造成重要的影响。……