基于ARM的心电信号检测

为了更好地解决心电信号的采集和处理问题,设计了以ARM微处理器LPC2368为控制核心,采用嵌入式μC/OS_Ⅱ操作系统的心电信号检测系统。将微弱的心电信号经过放大滤波处理后提取出来,利用A/D转换器将其转换为数字信号,通过串口上传到PC上进行分析处理;也可以在ARM上实现对心电信号的实时滤波、基于差分方法的QRS波检测以及心率计算。经测试,该系统实现了对心电信号的实时采集、存储、显示、数据传输、数字滤波及QRS波检测等功能,达到了预期目标。

Detection of ECG signals based on ARM

In order to better solve the problems in the acquisition and processing for ECG,a domestic ECG detecting system,which uses ARM processor LPC2368 as the kernel,μC/OS_Ⅱ as the embedded operating system is designed.The function is to adjust the lower signals to acquire the valuable analog ECG signals,then they are converted to digital signal,which can be stored and sent to the computer by serial ports,we can analyze and process the signals on the computer;In addition,some functions can accomplished on ARM such as the real-time filtering of ECG signal,the detection of QRS by the difference method and the calculation of heart rate.ECG signals and parameters can be dynamically displayed on LCD.The tested results show that the system has achieved goals such as ECG signal acquisition and storage,ECG displaying,data transimission,digital filtering and QRS detection,etc.