采用PIC18F4550单片机的低成本高效心电测量系统

2015 International Conference on Electronic Design, Computer Networks & Automated Verification (EDCAV) Pub Date : 2015-03-16 DOI:10.1109/EDCAV.2015.7060529

D. Sarkar, A. Chowdhury

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引用次数: 6

摘要

介绍了一种基于PIC18F4550单片机的简单、高效、低成本的心电和心跳测量系统。该设计包括基于LT1028运放IC的信号调理单元。单片机内部检测到的心电信号通过USB CDC协议发送到基于Lab VIEW的GUI平台，并通过RS-232协议进行测试。信号绘制和心跳计算在LabVIEW程序中完成。心电信号也可以通过低通滤波级从PIC18F4550单片机的PWM端口查看。利用Proteus电路模拟器对整个设计进行了成功的仿真。心电信号以音频格式(. wav)从LabVIEW生物医学工具包中提取，心电模拟器保持1.2 mV电压上限和-0.4 mV电压下限。音频文件作为输入输入到Proteus电路中。USB仿真是在Proteus Virtual USB和Microchip USB CDC驱动程序的帮助下完成的。RS-232虚拟串口是使用Eltima虚拟串口软件创建的。采用MPLAB IDE作为单片机程序编译器。

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Low cost and efficient ECG measurement system using PIC18F4550 microcontroller

This paper demonstrates a simple, efficient and low cost ECG and heart beat measurement system using PIC18F4550 microcontroller. The design includes LT1028 OP AMP IC based signal conditioning unit. Detected ECG signal inside microcontroller is send to a Lab VIEW based GUI platform with USB CDC protocol and also tested with RS-232 protocol. Signal plotting and heart beat calculation is done inside LabVIEW program. ECG signal can also be viewed from PWM port of PIC18F4550 microcontroller via a low pass filtering stage. The whole design is simulated successfully with Proteus circuit simulator. The ECG signal is extracted in audio format (.WAV) from LabVIEW biomedicai toolkit for ECG simulator keeping 1.2 mV upper voltage limit and -0.4 mV lower voltage limit. The audio file is given as the input to the circuit in Proteus. USB simulation is done with the help of Proteus Virtual USB and Microchip USB CDC driver. RS-232 virtual serial port is created using Eltima virtual serial port software. MPLAB IDE is used as microcontroller program compiler.

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来源期刊

2015 International Conference on Electronic Design, Computer Networks & Automated Verification (EDCAV)

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