高速双通道A/D数据采集系统及其应用

A High-Speed Two-Channel A/DData Acquisition System and Its Application

针对大学物理实验中手动逐点测量数据的落后现状 ,设计了高速双通道数据采集系统 ,能实现在手动调节或自动扫描自变量的同时 ,由计算机自动记录自变量和函数的双通道电压数值 .其特点是利用 DMA(直接数据通道传送 )接口技术 ,充分发掘 A/ D转换芯片的固有高速性能 .

In view of the backwardness in manual recording of measurement data point by point in experimentation in college physics,a high speed two channel A/D data acquisition system is developed which,while performing manual regulation or automatic scanning of independent variables,implements automatic recording of the two channel voltage of the independent and dependent variables by the computer with the help of DMA technique to give full play to the intrinsic high speed attributes of the A/D chip.The design presented by this paper is of practice use in improving laboratory facilities for college physics.