基于FPGA的交流信号测量系统的分析及设计

Design and analysis of AC measurement system based on FPGA

以现场可编程门阵列芯片为核心实现了一个交流信号参数测量系统.系统选用ADC0809芯片作为数模转换部分,其转换信号作为FPGA的输入进行处理并用芯片自带的LED数码管作为输出显示.通过利用FPGA上自带的矩阵键盘输入功能并对其进行编程控制,可以方便的切换显示交流输入的最大值、最小值、平均值、峰峰值、频率以及直流输入的峰值,实现对交流信号的多样化分析.系统功能较为强大,操作简单,用户可以轻易地根据自身需要进行修改以添加一些额外的测量功能.

This paper realizes an alternating current signal measurement system via FPGA （Field Programmable Gate Arty）. The system utilizes the integrated chip of ADC0809 as the A/D component while its output functions as the input of FPGA for processing and the final output of the system will be displayed by the LED as part of the FPGA. Through the utilization of the matrix keyboard of FPGA and programming for controlling the processing, it is convenient to switch among the display of the maximum value, the minmum value, the average, peak to peak value, the frequency and the peak value of DC input, thus realizing the diverse analysis of alternating signals. Thanks to the consummate function and simple operation of the system, users can easily amend the program to add some extra measurement selections according to concrete requirements.