【摘要】 FFT分析仪是长期以来工程人员进行时域、频域信号分析与处理的必备仪器,但是由于其属于传统仪器,存在着许多固有的缺点,使用上很受限制。文中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、功能强大等许多优点,充分满足了信号采集、实时处理与存储等多方面的需求。先后从硬件、软件2方面介绍了基于虚拟仪器技术的FFT分析系统设计与实现的方法,随后给出了某些功能的运行实例和误差分析。更多还原

【Abstract】 In a long period, FFT analyzer is the necessary instrument for engineers to analyze and process signals in time and frequency domain. However, 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 which is popular at the present time and taking advantage of PXI instruments and LabVIEW programming environment, the FFT analyze system based on the VI technology is completed. This system has a lot of advantages, such as small,powerful,etc.It satisfies the user’s various needs completely, such as data acquire, real-time process, store, etc. By describing its hardware and software in order, the design and realizing method of the FFT analyze system based on the VI technology is introduced. Then the running examples and error analysis of several functions are given.更多还原