基于单片机的简易频谱分析系统的设计

Design of simple spectral analysis system based on microcontroller

目的设计一种简易的频谱分析系统,实现系统的硬件和软件设计。方法该系统以C8051F020单片机作为核心处理器,利用单片机内部的500ksps、8位逐次逼近式转换器进行A/D转换,使用FFT技术对信号频域进行分析,并将频谱分析的结果通过LCD屏实时显示并上传至上位机。结果与结论该系统具有较高的可靠性和较强的实时性,可以实现信号频谱的显示和信号波形的显示,并能实现数据的快速测量和传输。

Objective—To design a simple spectrum analysis system and to realize the design of the system＇s hardware and software.Methods—Choosing SCM C8051F020as the core processor,this design uses the internal 500ksps,8bit successive approximation converter of MCU for A/D conversion.Besides,it uses FFT technique to analyze the signal,display the results of spectral analysis timely through LCD and upload it to the upper computer.Results and Conclusion—The analysis result of the experiment shows that the system has high reliability and good real-time performance.Apart from this,it also shows that the system can display the spectrum signal,the waveform of the signal and realize fast measurement and data transmission.