【作者】 谢（王亭）嵉；

【导师】 秦树人；

【作者基本信息】 重庆大学 ， 机械电子工程， 2003， 硕士

【摘要】 频谱分析仪是信号分析与处理中常用的仪器，它可对信号进行时域分析、幅值域分析、频域分析、解调分析、数字滤波、相关分析和传递相干分析。虚拟仪器是日益发展的计算机硬件、软件和总线技术在向其它领域密集渗透的过程中，与测试技术、仪器技术密切结合，共同孕育出的一项新成果。智能控件化虚拟仪器是虚拟仪器发展的一个全新模式。将智能控件化虚拟仪器技术应用到频谱分析仪的设计与制造中，给频谱分析仪带来了全新的面貌。本文介绍了智能控件化虚拟仪器的原理。这一概念的基本思想是：将一些虚拟控件经“功能赋予”后与仪器功能进行“测试融合”从而形成“智能仪器单元”，通过“积木式拼搭”，可直接在PC机内形成各种类型的虚拟仪器并显示在屏幕上供用户使用。这些“智能仪器单元”称为智能虚拟控件，它是一种被仪器功能“激活”了的，有“生命”的虚拟部件，它既描述了智能控件化虚拟仪器的形象，也描述了它的本质。智能虚拟控件的模型包括几何尺寸、几何形状、控件颜色、结构参数和控件描述等五种基本要素。将这些基本要素抽取出来，作为控件的基本属性，并且对外提供接口供用户按照实际需要进行修改，使得智能虚拟控件在功能上具有灵活性，在外观上具有多变性。本文例举了常用的按钮控件、选择开关控件和滑杆控件的具体设计与制作来说明智能虚拟控件的设计与制作。智能控件化虚拟仪器的功能控件的建模，决定了虚拟仪器所具备的所有功能。本文介绍的智能控件化频谱分析仪所具备的功能，有信号的时域分析、FFT变换以及IFFT反变换、信号的微积分运算、信号的频谱分析、信号自功率谱密度函数计算、信号互功率谱密度函数计算、频率响应函数计算和相干函数计算，都是集成在功能控件里面的。本文最后介绍了智能控件化频谱分析仪的组装。并且提供了典型信号的分析实例和工业应用的实例，来证明在仪器拼搭场中拼搭的智能控件化频谱分析仪功能的正确性。更多还原

【Abstract】 In analysis and transaction of signals, spectrum analyzer is a classical and important instrument which is mainly used to analyze the time domain wave, amplitude, spectrum domain wave, demodulating analysis, digital filtering, correlate analysis, transfer function and Coherence Function of signals. And the technology of Virtual Instrument is a new achievement combined by test and instrument technology in the process that the developing hardware, software and bus technology of computer penetrate into other fields. And the intelligent controls-oriented virtual instrument is a fire-new model in development of Virtual Instrument. It bring a fire-new appearance to spectrum analyzer that using the ideal of Intelligent Controls-oriented Virtual Instrument in the manufacture and design of it. The paper introduces the general ideal of Intelligent Controls-oriented Virtual Instrument. What the ideal is that intelligent cells of instrument can compose various instruments, and can show them to user on PC, which are derived from virtual controls by combine virtual control and functions of instruments through functions endowing. The intelligent cells of instrument named intelligent virtual controls is a kind of living virtual part endowed instrument functions, which describe the appearance and the essential of Intelligent Controls-oriented Virtual Instrument.The mode of intelligent virtual controls consists of the dimension, the shape, the color, the structure and the description of intelligent controls. And abstract them as the properties of controls, which can be modified by users externally through the interface provided by system. Then intelligent controls not only have flexible functions, but also have variable appearance. This paper exemplifies Button, Switch and Slider control to demonstrate the design and manufacture of controls. The mode of function controls in intelligent virtual instrument describes the functions inside instrument. The various functions inside the virtual spectrum analyzer introduced in the paper is time domain wave analysis, FFT transfer, IFFT transfer, Cross analysis, and so on, which are all described in function controls.Finally, this paper introduce the assemble of intelligent controls-oriented virtual instrument. And use classical signals and industrial practices to demostrate the accurate of virtual spectrum analyzer.更多还原