共查询到18条相似文献,搜索用时 109 毫秒
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仪器可互换技术是新一代自动测试系统的关键技术之一。针对可互换技术只能实现同类仪器的互换,无法实现具有相同信号能力的不同类仪器的互换以及多功能仪器的互换等问题,文中开展面向信号的仪器可互换技术研究。STD标准是信号和测试定义标准,为实现面向信号的仪器可互换技术提供支撑。首先分析面向信号的仪器控制模型,找出测试描述中与仪器相关的重要环节,即信号操作与信号接口的映射关系,以及测试描述与仪器能力的信号匹配;再建立统一的函数接口,实现不同角色信号的标准化映射过程,通过设计自定义匹配流程,根据信号类型及对应的属性表达式实现信号的自动匹配;最后,对仪器互换过程进行验证。结果表明,基于STD标准的仪器可互换技术不仅能够实现同类仪器的互换,还能实现不同类仪器的互换,实现过程简单方便。 相似文献
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GPIB仪器是目前比较通用的仪器设备,市场上的大部分仪器都带有GPIB接口,可以方便的组成自动测试系统,本文介绍了用VC++6.0开发的一个实用的GPIB仪器查询程序,能够完成自动测试系统中GPIB仪器设备信息的查询,为大家开发自动测试程序提供了一种思路。 相似文献
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面向测试程序集(TPS)软件架构是通用自动测试系统的发展方向,而建立统一的测试系统模型是测试系统中资源管理与配置的关键。提出了一种基于TPS的自动测试系统建模方案及实现机制,利用关系型数据库建立包括仪器仪表资源自动配置、被测件管理、测试底版通信控制的自动测试系统模型。基于VC6.0平台,在测试主程序与仪器仪表控制、与测试底版之间建立引擎,实现资源的自动选择和配置,解决了测试程序对仪器仪表的依赖问题及测试底版的通用性问题。该方案已经成功应用于某出口三型雷达综合电路集成测试系统中。 相似文献
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针对敌我识别设备研制生产过程中测试项目繁多、流程复杂、人工测试耗时费力等问题,通过分析敌我识别设备工作原理,搭建了软硬件资源。介绍了以工控机为主控系统、LAN/RS232/RS485/RS422为通信接口的硬件资源,设计了软件架构和自动测试流程。其中可互换虚拟仪器(Interchangeable Virtual Instrument,IVI)驱动器的设计成功将测试程序与硬件分离,只需新增仪器配置,添加相应的驱动,便可实现底层仪器置换,满足测试需求。应用结果证明该自动测试系统能快速检测模块和组装后的整机各项技术指标,且将测试时间缩短至3 h,具有实际使用价值。 相似文献
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To automate test and measurement systems in R&D and manufacturing settings, it is common practice to connect the instruments to computers. With modern programming languages and a simple setup, the task is no harder than calling up a simple function. The only remarkable aspect is that this function communicates with a hardware device that either measures or stimulates some aspect of the physical world. Grouping the functions needed for controlling an instrument forms a library, which is called an instrument driver. Above all, instrument drivers are convenient. They can be used to build test and measurement systems having interchangeable elements, so that the systems can be maintained through, and despite, changes in the computer, the instruments, and the device under test (DUT). Basically, the drivers encapsulate the various I/O operations between computer and instrument. They are also a convenient interface for those test programs that use instruments. And-an important benefit-they help to insulate the test system from changes made in the underlying instrument hardware. In theory, a test engineer should be able to exchange a new instrument for an existing one within a system and reconfigure that system to use the appropriate driver. In practice, further work is unavoidable before the system will behave as it did before the exchange. Several solutions are being considered by instrument vendors and end-users, including exactly how to exchange instruments within a system, and to what standards a particular driver or system should conform 相似文献
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基于虚拟仪器的自动测试系统研究 总被引:1,自引:0,他引:1
随着自动测试设备由台式仪器向模块化仪器方向的发展,自动测试系统正在从专用型向通用型方向转变,但是仪器互换性和测试程序的可移植性问题限制了它的发展.近年来,虚拟仪器在自动测试中的应用越来越广泛,运用虚拟仪器可以共享硬件和软件资源,并且方便、快速的组建各种自动测试系统.本文描述了自动测试系统的基本概念,系统构成,工作原理;分析了自动测试系统的发展趋势和国内外的研究现状,虚拟仪器的发展概况以及虚拟仪器对自动测试系统的影响,故障诊断与故障定位;并且着重介绍了基于虚拟仪器的自动测试系统软硬件的构成,及其它们的工作原理,测试工作等,叙述了自动测试系统的功能自检测. 相似文献
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MAMin CHENGuang-ju 《中国电子科技》2005,3(2):157-160
Virtual instrument is playing the important role in automatic test system. This paper introduces a composition of a virtual instrument automatic test system and takes the VXIbus based a test software platform which is developed by CAT lab of the UESTC as an example. Then a method to model this system based on Petri net is proposed. Through this method, we can analyze the test task scheduling to prevent the deadlock or resources conflict. At last, this paper analyzes the feasibility of this method. 相似文献
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Sungho Kang Szygenda S.A. 《Very Large Scale Integration (VLSI) Systems, IEEE Transactions on》1994,2(1):89-99
The simulation automation system (SAS) was developed to provide an efficient simulation environment, by automating the entire simulation process. This system can be classified, by its salient unique features, into: automatic model generator (AMG), automatic simulator developer (ASD), and design error simulation and test system (DEST). The system can automatically generate multivalued simulation models and automatically develop various simulators, using domain specific automatic programming techniques. The automatic model generation feature can be used when a new model library is built or when an existing library is upgraded. The automatic simulator development feature allows a user who may not be knowledgeable about simulators, to easily develop unique simulators, which can be used for special purposes or special designs. SAS can also verify designs using the Design Error Simulation and Test System. It provides a confidence measure of the verification, as well as simulation results. When users are not satisfied with the confidence level achieved after simulation, they can automatically generate additional simulation patterns for design errors in order to achieve a higher confidence level. Using this approach, design verification time and cost can be considerably reduced, and an actual measure of verification is provided. Consequently, the design cycle can be considerably reduced. This is especially significant for large, complex systems 相似文献
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近年来,随着机器视觉技术的进步,仪表数据读取方式由以往的人工采集,逐步向机器自动化读取发展。传统的仪表识别算法通常以PC平台为运行基础,在移动终端的实现研究内容相对较少。文中基于图像处理技术,以指针式仪表与数码管式仪表数据自动读取为目标,在安卓平台上搭建软件系统,实现在移动端对不同种类仪表数据自动读取。文中借助iData-80终端设备及工业仪表进行系统测试实验,实验结果表明,该系统能够实现全时段、多场景下的自动读取仪表示数,具有精度高、成本低,及性能可靠等特点,在实际工业、生活应用中具有实用性与可推广性。 相似文献