基于虚拟仪器技术的FFT分析系统的研究

FFT分析仪是长久以来工程人员进行时域、频域信号分析与处理的必备仪器,但是因为其属于传统仪器,于是有许多固有的缺点,使用上很受局限.结合时下流行的虚拟仪器技术,利用PXI设备和LabVIEW编程环境,开发出了基于虚拟仪器技术的FFT分析系统.该系统具有体积小、功能强等许多优点,充分满足了信号采集、实时处理与存储等多方面的需求.介绍了基于虚拟仪器技术的FFT分析系统设计与实现,包括关键环节的解决方案举例,随后给了出了某些功能的运行实例和误差分析.

Study of FFT Analyzer System Based on Virtual Instrument Technology

In a long period,FFT analyzer is the necessary instrument for engineers to analyze and process signals in time and frequency domin,but due to being sorted into traditional instruments,it has many inherent shortcomings. As a result,it is restricted within small range in use.Integrating the VI technology popular at the present time and taking advantage of PXI instruments and LabVIEW programming environment,a FFT analyzer system based on the VI technology is completed.This system has a lot of advantages,small,powerful,etc..It meets user's various needs com- pletely,such as data acquisition,real-time processing,storage,etc..The design and realization of the FFT analyzer system based on the VI technology is introduced,including example of the resolvent for pivotal part,then the running examples and error analysis of several functions are given.