LabVIEW环境下的多功能频谱分析仪设计

Design of Multi-purpose Spectrum Analyzer Based On LabVIEW

为对信号进行频谱分析并降低系统成本,设计了一种基于LabVIEW8.2环境的虚拟频谱分析仪。该仪器可对内部信号(包括LabVIEW产生的基本信号和函数信号、磁盘中的.WAV音频信号)及外部信号(包括.MP3文件、信号发生器产生的信号)进行频谱分析。与大多数同类软件相比,该仪器可以利用电脑自身所带的声卡对外部信号发生器产生的信号进行"模拟-数字"转换,并以.BMP图片格式保留实验结果。此外,尽管该仪器在LabVIEW环境下开发,但通过生成.EXE文件的方式,可使其在没安装LabVIEW环境的PC机正常运行。实验结果表明,在误差允许的范围内,该仪器完全可替代传统频谱分析仪的作用。

In order to analyse the spectral of signals and reduce system cost, the design of a virtual spectrum analyzer based on LabVIEW8.2. The instrument can make spectral analysis of internal signals （including basic and functional signals generated by LabVIEW and . WAV signal on your local disk） and external signals（including voice signal and signals generated by a signal generator）. Comparing with most instruments, it can analyse signals generated by signal generators using PC＇s sound card,and save experiment results in . BMP format. Moreover,this instrument can also run in a computer without LabVIEW by the way of generating executable file. The experiment result shows that this instrument can play the role of traditional spectrums analyzer in the range of allowable error.