基于数字技术的傅里叶级数实验仪研制

Development of Fourier Series Experiment Instrument Based on Digital Technology

傅里叶级数分解与合成实验是电子信息类专业的主干实践课程。传统实验仪器基于模拟电路技术设计,存在波形不稳定、测量数据不准确、可靠性较弱等不足。该文基于数字频率合成技术设计并实现一款新型傅里叶实验仪,包括信号发生模块、放大模块、调幅模块、移相模块、合成模块等,并提出了实验方案。另外,实验仪设计还充分考虑了组装效率及维修便利性。样机测试数据表明,新实验仪在输出信号质量以及实验数据准确性等方面有明显改善。

Fourier series decomposition and synthesis experiment is the main practical course of electronic information specialty.Traditional experimental instruments are designed based on analog circuit technology,which have some shortcomings,such as unstable waveform,inaccurate measurement data,weak reliability and so on.This paper designs and implements a new Fourier experimental instrument based on digital frequency synthesis technology,including signal generation module,amplification module,amplitude modulation module,phase shift module and synthesis module,and optimizes the experimental scheme.In addition,the assembly efficiency and maintenance convenience are fully considered in the design of the experimental instrument.The prototype test data show that the new experimental instrument has significantly improved the signal quality and experimental data measurement of the machine..