摘要
为解决目前心率测量仪器抗干扰能力不理想、便携性差等问题,设计了一种基于MSP430单片机的心率测量仪。系统主要由数据采集与预处理、微处理器、LCD显示等模块组成。系统将电极采集到的体表心电信号经INA321差分放大后,经MSP430FG438片内模拟运放再次放大后反馈到片内的模数转换ADC12内进行采样,采样后的心电信号经高低通滤波,得到滤除干扰的QRS波群,经算法处理后在LCD上显示心率值,并可通过RS232接口上传至PC机进行心电波形显示。测试结果表明,测量仪具有抗干扰能力强、便携、性价比高等优点,可用于社区或家庭的人体医学监护,具有较高的应用推广价值。
In order to solve the problems of poor anti-interference ability and poor portability of heart rate measuring instruments,a heart rate measuring instrument based on MSP430 microcontroller is designed.The system is mainly composed of data acquisition and preprocessing.The system amplifies the electrocardiogram（ECG）acquired by the electrode by INA321 differential amplification,then amplifies it again by MSP430 FG438 analog operational amplifier,and then feeds back to the on-chip A/D conversion ADC12 for sampling.The sampled ECG signal is filtered by high and low pass filter to filter the interference QRS wave group.The heart rate value is displayed on the LCD after the algorithm processing,and can be uploaded to PC through the RS232 interface to display the ECG waveform.The test results show that,The system has the advantages of strong anti-interference,portability and high performance-to-price ratio.It can be used in community or family medical monitoring of human body,and has high application and popularization value.
作者
江涛
Jiang Tao(Shaanxi Polytechnic Institute,Xianyang 712000,China)
出处
《电子测量技术》
2018年第13期129-133,共5页
Electronic Measurement Technology
