基于SD卡的动态心电数据存储器的研究

Development of ECG Holter Based on SD Card

目的:设计一种能长时间进行心电数据存储的Holter。方法:利用SD卡作为大容量存储介质,将预处理后的心电信号经过模数转换,通过USB 2.0专用微控制器CY7C68013A将大量的心电数据暂存在SD卡中,设计成了一种新型的动态心电数据存储器。结果:主机与SD卡之间的数据通讯通过SPI总线实现,LCD可显示系统菜单和状态信息,最终SD卡中的数据可通过USB传输到PC,或由专用读卡器读取。经计算,1GB的SD卡可连续记录心电数据长达1个月的时间。结论:本存储器的便携式设计为户外出行提供了方便。

Objective To design a hoher, which can record ECG for long time. Methods SD （secure digital） card was adopted as mass storage medium. The preprocessed ECG signals were converted into digital data which were stored temporarily into SD card by the USB-2.0-spicified microcontroller CY7C68013A. Results SPI bus was introduced for data communication between the host and SD card. The LCD module was utilized to display the menu and states of the system. The data stored in SD card were transmitted to a PC via the USB, or read by a specified card reader.1 GB SD card could record for about one month. Conclusion The portable design of this device is convenient for outgoing. [Chinese Medical Equipment Journal, 2008,29 （4） ： 25-27]