基于MIMIC数据库的多参数数据D/A回放系统

Multi-Parameter Data D/A Redisplay System Based on MIMIC Database

文中分析了MIMIC多参数智能监护数据库存储文件的识读方法,该数据库公开发表于PhysioNET,还研究及基于STM32和DAC8568的多参数数据D/A回放系统,包括系统硬件工作原理和系统软件工作原理。MIMIC多参数智能监护数据库的数据文件对于变异性较大的生理参数采用连续采样的方式,而对于相对稳定的生理参数采用周期采样的方式,因此,多参数数据各信号的抽样频率不同。系统首先通过VC++编程读取一个多抽样频率数据并在PC机上显示其波形,然后经过D/A硬件设备进行D/A转换后使用示波器输出其波形,实现输出的波形与原始的波形能同时回放。系统可作为模拟信号源,为远程多参数生理监护仪的研制奠定了基础。

The paper analyzes the MIMIC Multi-Parameter intelligent monitoring database storage file＇s reading method, the database is published in PhysioNET. The paper also describes a multi-parameter data D/A redisplay system based on STM32 and DAC8568, including the working principle of the system hardware and the working principle of the system software. The MIMIC Multi-Parameter intelligent monitoring database＇s data file for the large variability of physiological parameters use continuous sampling, and the relatively stable physiological parameters use periodic sampling. Therefore, Multi-parameter data for each of the signal sampling frequency is different. Firstly, the system through VC＋＋ programming to read more than one sampling frequency data, and display its waveform in the personal computer. Secondly, after the D/A conversion of the D/A hardware equipment, using oscilloscope output its waveform. The output waveform with the original waveform can be playback simultaneously. The system can be used as an analog signal source, and laid the foundation for the development of remote multi-parameter physiological monitor.