基于Linux操作系统嵌入式心电记录仪的设计

Development of embedded electrocardiogram recorder based on Linux

介绍了一种基于ARM9和Linux操作系统的心电记录仪。该记录仪以32位低功耗ARM9微处理器S3C2410X为核心,在其上移植了Linux操作系统,利用轻量级的图形用户界面支持系统MiniGUI进行软件界面开发,实现了心电信号的实时采集显示、心率计算、心律失常分析并利用GPRS进行心律失常报警等功能。为了检验系统的性能,使用心电信号模拟发生器(MPS450多参数模拟器)产生各种类型的心电信号,用该记录仪进行采集分析,记录仪分析获得的心率值与模拟发生器产生的心率值基本相同,当模拟发生器产生异常心电时,记录仪通过GPRS发出报警信息,同时在主界面上显示心律失常类型。实验结果表明,该记录仪能实时采集显示心电波形,当发生心动过速、心动过缓、心律不齐、漏搏、停搏时,能通过GPRS进行实时报警,实现了心电信号的无线远程实时监护。

An embedded electrocardiogram （ECG） recorder based on ARM9 and Linux real-time operating system （RTOS） is introduced in this paper. It was based on S3C2410X, which was a 32-bit low power micro-controller. And this recorder transplanted Linux RTOS. We developed the software based on MiniGUl which was a lightweight graphics user interface support system. This system could collect the ECG signal, calculate the heart rate, analyze the arrhythmia and send the alarm by GPRS when ECG was abnormal in real time. In order to validate the veracity of system, the ECG signals generated by an ECG signal generator, which was a multi-parameter simulator MPS450, were sampled and analyzed by this recorder. The heart rate acquired by the system was accordant with the data by the simulator. The recorder could send alarm information automatically through GPRS when ECG signal was abnormal and display the arrhythmia on the main interface. Experiment results show that the system can monitor the patient＇s ECG in real time, detect 5 kinds of arrhythmias： Tachycardia, Bradycardia, Arrhythmia, Asystole and Dropped, and send alarm when arrhythmias happen. So the wireless monitoring of ECG signals can be implemented by this system.