基于虚拟仪器的信号与系统实验装置研制  

Research on Comprehensive Experiment Platform of Signals and Control Based on Virtual Instrument

作　　者：冯学玲 翁文婷 吴葛 邓春花[1] 尹仕[1] Feng Xueling;Weng Wenting;Wu Ge;Deng Chunhua;Yin Shi(School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学电气与电子工程学院,武汉430074

出　　处：《机电工程技术》2022年第4期30-34,共5页Mechanical & Electrical Engineering Technology

基　　金：教育部第二批新工科研究与实践项目(编号:E-NYDQHGC20202219);新形势下工科高校教学实验队伍职能变革的实践与研究(编号:2020SYD08)。

摘　　要：基于单一功能电路板的信号与系统实验装置,学生仅能开展基本验证性实验,难以全面掌握信号的变换、频谱分析和识别与提取等重难点内容。因此采用一体化、模块化设计硬件实验平台,实现声音、生理和电信号的采集与检测,通过NI便携式数据采集卡实现虚拟仪器平台和实际硬件系统的信号数据传输,然后通过NI虚拟仪器软件平台编写图形化程序来完成各类信号的采样、滤波设计、频谱分析以及分类识别,最后完成数字信号的保存和显示,以此构建了虚实结合的信号分析综合实验平台。基于平台开发了调音器和听音识曲、心电质量分析仪和分龄识别器以及单相电能质量分析仪3项综合性实验项目,并完成了软硬件测试。测量结果表明设计的实验装置满足本科实验教学的要求,能够培养学生主动学习、探究工程创新的能力。Based on the signal and system experimental device with the single function circuit board,students can only carry out basic confirmatory experiments.In this way,it is difficult to fully master the key and difficult contents such as signal transformation,spectrum analysis,identification and extraction.Because of this,the integrated and modular hardware experimental platform was used to realize the acquisition and detection of the sound,physiological and electrical signals.The signal data transmission between the virtual instrument platform and the actual hardware system was realized through the portable data acquisition card.Then the graphical program was compiled through the NI virtual instrument software platform to complete the sampling and filtering design of various signals spectrum analysis and classification recognition.Finally,the preservation and display of digital signals was completed,and a comprehensive experimental platform for the signal analysis was built.Based on this platform,three comprehensive experimental projects were developed,including the tuner and music recognition,the ECG quality analyzer and age discriminator,and the single-phase power quality analyzer.The software and hardware tests were completed.The measurement results show that the experimental device meets the requirements of undergraduate experimental teaching,and can cultivate the ability of students to actively learn and explore engineering innovation.

关 键 词：信号采集与检测 信号处理 NI虚拟仪器 实验教学 

分 类 号：TM935.21[电气工程—电力电子与电力传动]