气压与心电相关数据采集系统的设计

Design of Air Pressure and ECG Signals Acquisition System

设计了一种气压与心电同步数据采集系统.利用该系统对气压和心电信号进行长时间同步采集,揭示了气压变化与心电信号之间的对应关系.为满足系统低功耗的需要,通过对MSP430F149以及外围电路的分析,分别给出软硬件解决方法;另一方面,为方便地进行存储容量的扩展,系统采用了读写速度快、功耗低的低电压外部数据存储器SD/MMC卡存储信号,对信号不做任何的压缩处理,可保证信号的保真度.

We develop a data acquisition system, by which, we can collect air pressure and ECG signals synchronously in order to reveal the relationship between air pressure and ECG signals. When we have analysed the MSP430F149 and its peripheral circuits, software and hardware solutions are developed in order to meet the low power consumption needs. On the other hand, for the convenience of storage expansion, this system uses SD/ MMC card for data storing, which has characteristics of fast speed of r/w, low power consumption, and none of the compression methods is applieated to stored signal for the sake of high fidelity.