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在开发心电信号(ECG)的计算机辅助诊断系统中,由数据采集系统采集到的心电数据具有信号弱、频率低、干扰大的特点,特别是50Hz的工频干扰。本文利用MATLAB提供的工具箱,高效地设计出了满足实际要求的滤波器,并通过VC++与MATLAB语言的混合编程,应用于心电信号的计算机辅助诊断系统中。该法省却了其它设计方法的烦琐过程,且满足了相应的技术指标。在辅助诊断系统设计中的实际应用,证明了该滤波器的有效性。
In the development of computer aided diagnosis system of ECG, the ECG data collected by the data acquisition system has the characteristics of weak signal, low frequency and large interference, especially 50Hz interference. In this paper, the toolbox provided by MATLAB is used to efficiently design the filter that meets the actual requirements. It is applied to the computer aided diagnosis system of ECG by the mixed programming of VC ++ and MATLAB language. The method saves the cumbersome process of other design methods, and meets the corresponding technical indicators. The practical application in the design of auxiliary diagnosis system proves the effectiveness of this filter.