【作者】 陈恒；

【导师】 魏蛟龙；

【作者基本信息】 华中科技大学 ， 通信与信息系统， 2004， 硕士

【摘要】 面向VXI总线的测试资源管理的目的就是为自动测试系统提供控制VXI仪器的软件接口,实现激励信号的加载、响应信号的采集和存储功能。而提供通用化的仪器控制接口是未来面向VXI总线的测试资源管理方法的发展方向。本文的研究目的就是为“板级产品故障诊断软件开发平台”提供通用化的测试资源管理方法。首先,本文通过在面向仪器的测试资源管理方法中使用IVI规范,解决了测试仪器的互换性,达到软件对仪器访问控制的通用性。并通过对VXI即插即用规范(VPP)和互换性虚拟仪器规范(IVI)的研究,介绍了平台中面向测试仪器的测试资源管理方法的软件结构,提出了一种动态执行VXI仪器驱动函数的方案,从而达到用通用化的手段控制测试仪器的目的,为平台提供了产生激励信号和采集响应数据的功能。另外,目前IVI规范中的数字自动测试仪的类驱动程序标准正在开发中。针对平台在数字电路测试中对测试资源管理方法通用性的需求,以测试泛环境(A Broad-Based Environment for Test)资源管理软件接口和IEEE1445标准为基础,使用了面向信号的测试资源管理方法,提出了“虚拟测试资源模型”。通过应用该模型,来隔离测试软件和硬件设备,使得测试平台中测试仪器和信号通道的变化不会影响到测试软件的开发,实现数字电路测试中软件对仪器访问控制的通用性,并以双端口RAM电路板的诊断为实例,对模型进行了测试和分析。测试结果表明,该模型实现了数字电路测试中测试资源管理方法的通用性。最后对所做的工作进行了总结,并指出了今后需要进一步研究和探索的问题和方向。更多还原

【Abstract】 The purpose of VXI oriented test resource management is to offer an interface for the auto test system to control the VXI instruments, so that the generation of stimulus signals as well as the recordation and storage of response signals can be realized. Offering general interface to control VXI instruments is the direction of VXI oriented test resource management in the future. The study purpose of this thesis is to offer a general test resource management method for the project "Platform for Developing Fault Diagnosis Systems of Circuit Boards ".First, this thesis uses the IVI drivers in the instrument oriented test resource management method to achieve the interchangeability of instrument, so that the generation of controlling VXI instrument can be realized. By studying the standards of VXI Plag&Play(VPP) and Interchangeable Virtual Instrument(IVI), this thesis introduces a software architecture that realizes the instrument oriented test resource management method in the VXI-Base diagnosis software development platform, and a method which is provided for calling the driver’s functions dynamicly. Using this method we can control the VXI instrument, send the stimulus and record the response.In addition, the IVI driver for digit IO is under development. According to the requirement of digit circuit test software development in the platform, this thesis introduces the "Virtual Test Resource Model" which applies the signal oriented test resource management method and is based on the "Software Interface for Resource Management for A Broad-Based Environment for Test" and IEEE-1445. By this way, the test software development can be separated from test instruments so that the changes of test instruments and signal channels will not affect the development of fault diagnosis software. The model is tested and analyzed by using of the diagnosis of the dual-port RAM circuit board. The result of test indicates that the generation of test resource management method in digit circuit test is realized <WP=5>At last, we review the entire work and suggest the direction for the future research in this field.更多还原