基于DSP技术的虚拟式FFT频谱分析仪

Virtual FFT Spectrum Analyzer Based on DSP Technology

虚拟仪器已经成为仪器发展的一个重要方向,目前已在众多领域获得了广泛应用。FFT频谱分析是机械工程、故障诊断等诸多领域所广泛采用的分析方法。但传统FFT频谱分析仪存在着不易更新、价格昂贵等缺点,虚拟式FFT频谱分析仪的产生摆脱了传统FFT分析仪的多种限制,为FFT分析仪的广泛应用铺平了道路。DSP技术在虚拟仪器中的应用更为虚拟仪器发展提供了广阔前景。作者在深入研究DSP处理系统的基础上,开发了基于DSP技术以及PCI总线的虚拟式FFT频谱分析仪,设计新颖,实用性强,进一步展示了虚拟仪器在仪器发展中的重要地位。

Virtual Instrument has become an important direction of instrument development, now it has been widely used in many fields. FFT analysis is a widely used method in mechanical engineering, fault detection and many other fields. However, the traditional FFT analyzer is expensive and is not easy to upgraded. The birth of virtual FFT Spectrum Analyzer gets rid of the limit of traditional FFT analyzer, and paves the way for the application of FFT analyzer. The uses of DSP technology make the future broadened of Virtual Instrument. This article ,based on the deep study of DSP system, designs a virtual FFT Spectrum analyzer based on DSP technology. The design is new and of great practicality, which indicates the important role of Virtual Instrument in the development of instruments.