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 contents , purposes and methods of audio analysis are studied in this paper 这些“智能仪器单元”称为智能虚拟部件，这是一种被仪器功能激活了的，有生命的虚拟控件，既描述了智能控件化虚拟仪器的形象，也描述了它的本质。
The intelligent cells of instrument named intelligent virtual controls is a kind of living virtual part endowed instrument functions , which descibe the appearance and the essential of intelligent virtual controls instrument , equally to say that intelligent virtual controls instrument is embodied by intelligent virtual controls 智能控件化虚拟仪器的主要思想是：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” ，构成各种各样的虚拟仪器供用户使用。其本质是通过智能虚拟控件来体现的。
This paper first begin with the connotation of virtual instrument technology , study and discuss the criterion and the working theory of usb deeply . on the principle of usb1 . 1criterion , using usb interface chip usbn9604 and low consumption mirochip c8051f231 , we designed the available interface of usb bus and its controlling software , turn the communicating function based usb bus between computer and testing device . second based on the developed interface of usb bus , using microchip pic16c62 and a mount of relays , we designed the multiswitching scanner and its controlling software to complete the funtion of accesses swithing in testing system . third calling the api function inside the windows using vb programming language , communicat with the impelling program of selected hid , achieve the function of testing instrument with usb interface , complete the development of upside software faced testing . at last , based on the deep studying of pcb testing method , used the developed multiswithing scanner and software faced testing , combinated with necessary testing instrument , we constructed the pcb testing system and analized the testing result simply 论文首先从虚拟仪器的技术内涵出发，深入研究和讨论了通用串行总线usb规范及工作原理，并依据usb1 . 1规范，采用usb接口芯片usbn9604和低功耗微处理器c8051f231设计开发了通用的usb总线接口及其控制固件，实现了通用计算机与测试设备之间基于usb总线的通信功能；其次，在所开发的usb总线接口的基础上，使用微处理器pic16c62和多路继电器开关，设计开发出实现测试系统中测试通道切换功能的多路通道扫描器及其控制固件；再次，采用vb语言编程，调用windows内部api函数，与选定hid类驱动程序进行通信，实现usb总线接口测试仪器功能，完成面向测试的上层软件开发；最后，在深入研究印刷电路板测试方法的基础上，利用已开发的多路通道扫描器和面向测试软件，结合必要测试仪器组建印刷电路板测试系统，并对测试结果进行了简要的误差分析。
The apparatus , with the specialities such as miniature , automation , flexibility , and individual - computer managing has become the developing trendof the testing equipment today . based on analysis of the characteristic and the system structure of the visual instrument , the paper has studied the design idea of it , put forward the exploiting methods of the visual instrument based on the object - oriented technique , exoatiated on the technique kernel of design the visual instrument under windows environment , designed a typical visual instrument " vis - 1 signal - analyzing and wave - displaying system " , which integrates multi - function instruments such as general oscillograph and ulf oscillograph real - time signal recorder wave and frequency - pedigree analysis instrument . the system has more excellent functions and characteristics than traditional instruments 本文研究了虚拟仪器系统的设计思想，在分析虚拟仪器系统的特点及其体系结构的基础上，提出了基于面向对象技术的虚拟仪器系统开发方法；阐述了windows环境下实现虚拟仪器的技术要点；实现了一个典型的虚拟仪器系统“ vis ? 1信号示波分析系统” ，该系统集普通示波器、超低频示波器、存储示波器、瞬态信号记录仪、波形及频谱分析仪等多种仪器功能于一身，并具有许多传统仪器难以达到的优越功能和性能。
