跨课程电子综合实验音频信号分析仪设计  

Inter-curriculum integrated electronic experimental design of audio signal analyzer

作　　者：周立青[1] 占伟杰 田震[1] 项进喜 

机构地区：[1]武汉大学电子信息学院,湖北武汉430072

出　　处：《实验技术与管理》2015年第11期81-85,90,共6页Experimental Technology and Management

基　　金：武汉大学设备处"实验教学开放实验"项目(610400011)

摘　　要：基于开展跨课程电子综合实验教学的思路,设计了音频信号分析仪综合型实验项目。该实验项目基于FPGA以及NIOS II软核处理器,采用快速傅里叶变换方法实现音频信号频谱的测量。该系统由前置可控增益放大器、抗混叠滤波器、有效值检测、测频以及模数转换器等主要电路模块组成,综合应用了电路技术、微处理器技术、数字信号处理以及控制原理等相关课程内容,开展了跨课程知识综合设计的尝试,对提升学生知识综合、系统设计能力具有直接效果,同时也为后续研究性工作提供基础,具有非常突出的综合性、创新性和延续性。An audio signal analyzer is designed as a demonstration comprehensive teaching project for the inter-curriculum integrated electronic system design.The Fast Fourier Transform （FFT）algorithm implemented in FPGA and NIOSII is adopted to measure the spectrum of audio signal.The introduced analyzer mainly consists of forefront variable-gain amplifier,anti-aliasing filter,true RMS detection,frequency measurement and A/D converter. Furthermore, the related knowledge from several curriculums including Electronic Circuit Technology,Microprocessor Technology,Digital Signal Processing and Control Theory are comprehensively utilized to conduct the tentative attempt for integrated design,which is directly beneficial to enhancing the ability to design the synthesized system with inter-curriculum knowledge and give rise to further study work. Consequently,the introduced teaching project has been proved to be of remarkable comprehensiveness, innovation and continuity.

关 键 词：电子综合实验 音频分析仪 快速傅里叶变换 现场可编程门阵列 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] G642.0[自动化与计算机技术—控制科学与工程]