本数据采集系统是基于单片机AT89C51来完成的，4路的模拟电压通过通用的8位A/D转换器ADC0809转换成数字信号后，由单片机进行数据处理，并将处理后的数据送LED显示器显示。再经过常用的8位D/A转换器DAC0832将数字数据转换成模拟量，供示波器观测。-The data acquisition system is based on SCM AT89C51 to complete, 4-way analog voltage through a common 8-bit A/D converter ADC0809 converted into a digital signal, by the microcontroller for data processing, and send the processed data LED display . Then through the common 8-bit D/A converter DAC0832 converts the digital data into analog, the oscilloscope for observation.