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本文涉及一种基于PDA等移动计算平台和CF接口技术的诱发电位测试系统的研究。这种诱发电位测试系统具备虚拟仪器结构特征,具有两个诱发信号输出通道和两个输入通道,可以输出重复频率0.01~100Hz、占空比5%~95%、幅度0~±5V并连续可调的各种函数或任意定义的诱发电信号,以50k sps的采样率实时采集诱发电位输入信号,并可以对输入信号进行模拟、数字信号处理,以满足诱发电位生理研究需要。在PDA等移动计算设备的CF接口基础上,设计出工作于I/O模式的CF+卡,并编写出运行于Windows CE等移动操作系统平台上的设备驱动程序和数据采集、处理程序,完成诱发电信号的产生和诱发电位的采集。实践表明基于PDA等移动计算设备和CF接口技术的诱发电位测试系统的卓越的诱发信号发生和实时采集、处理诱发电位信号的能力,满足大多数诱发电位生理研究的需要。
This article relates to a PDA-based mobile computing platform and CF interface technology evoked potential test system. The evoked potential test system has the characteristics of virtual instrument structure, with two induced signal output channels and two input channels, can output repetition frequency 0.01 ~ 100Hz, duty cycle 5% ~ 95%, amplitude 0 ~ ± 5V and continuous Tune a variety of functions or any defined induced electrical signals to 50k sps sampling rate real-time acquisition of the evoked potential input signal, and the input signal can be simulated, digital signal processing to meet the evoked potential physiology research needs. On the basis of the CF interface of mobile computing devices such as PDAs, CF + cards working in I / O mode are designed, and device drivers and data acquisition and processing programs running on Windows CE and other mobile operating system platforms are designed and completed. Electrical signal generation and evoked potentials collection. Practice shows that evoked potential test system based on PDA and other mobile computing devices and CF interface technology evokes excellent signal generation and real-time acquisition and processing of evoked potential signals to meet the needs of most electrophysiological studies.