利用IVI驱动程序在LabVIEW中构建测试系统

讨论了IVI驱动程序的特点、测试系统结构、MAX配置IVI 仪器过程,介绍了在LabVIEW环境中实现IVI编程的方法.     

基于LabVIEW的IVI编程

在介绍IVI类驱动程序和专用驱动程序的基础上,针对测量程序控制硬件发生变化时需要耗费大量的时间和精力重新编写程序的问题,以Fluke8840A为例,描述了利用NI公司MAX软件配置IVI仪器的Logical Names和Driver Sessions的过程、方法、步骤和注意事项,及在LabVIEW开发环境下如何利用IVI驱动设计IVI数字电压表测量程序。本文对正确地利用IVI驱动设计测试系统程序、推广利用IVI技术、节省开发时间和维护成本具有重要意义。     

建立与硬件无关通用测试程序的方法

IVI 驱动技术是当今受人推崇的软件控制新技术。文中阐述了 IVI 技术的应用,真正实现了仪器的可互换性.使得工程人员的测试程序可以应用于不同的仪器设备。文中介绍了 IVI驱动机制、使用工具、建立虚拟仪器等方面的相关问题。     

用IVI驱动程序建立硬件无关测试系统

可交换虚拟仪器(IVI)驱动程序是一种崭新的技术,使得测试程序可以在不同仪器之间使用,从而建立真正的独立于硬件的测试系统.文中介绍了可互换虚拟仪器(IVI)系统结构和运行机制,并给出了IVI的测试程序实例.     

基于IVI和信号测试的通用ATE

介绍了可互换的虚拟仪器技术的技术背景、体系结构、类驱动器、测量和激励子系统等，讨论了在ATE中基于信号的测试方法，建立了一个基于IVI技术和信号测试的ATE，将信号测试和可互换的虚拟仪器技术结合起来，实现测试程序和测试仪器之间的松耦合，在更高的层次实现测试仪器的可互换和测试程序的可移植。     

自动测试系统通用性的实现技术

文章分析了与开发通用ATS密切相关的标准/规范,从软、硬件两方面讨论了ATS通用性的实现途径,包括硬件配置及接口技术、IVI技术以及面向信号方法。ATS通用性的实现可以实现被测对象的跨平台测试以及测试程序的可移植,能带来显著的军事及经济效益。     

发动机自动测试系统的虚拟仪器技术

从航空发动机测试仪器的角度出发，对发动机测量仪器的发展及趋势进行了探讨，论述了虚拟仪器的概念、发展、体系结构，阐述了虚假仪器的构建技术及航空发动机自动测试系统中的应用前景。     

VXI总线仪器自动计量校准系统的研究

VXI总线仪器由于其性能优越且软，硬件体系具有开放性，在航空，航天，电子通信，交运运输，军事等领域得到广泛的应用。作为一种自动测量设备，VXI总线仪器自身的计量校准也是必要的，不可回避的。本文结合作者的研究课题，阐述了进行VXI总线仪器校准的必要性和特殊性，分析比较了几种VXI总线仪器校准方案，组建了一套自动校准系统，论述了校准软件的结构及软件误差的控制措施，最后展望了VXI总线仪器校准的发展方向。     

JSJ精密水准仪经纬仪综合检验仪原理及误差分析

介绍了一种最新研制的在室内检定高精度水准仪经纬仪的计量标准仪器，并分析了该仪器设计原理及误差来源。     

智能型五孔压力探针测试仪的研制

介绍了一种用8098单片机处理不对向测量五孔压力探针信号的测试仪器，它可以直接用数码管显示所测空间流场的总压、静压、α角、β角、速度和各测孔压力值，由于采用了高精度的带温度补偿的压力传感器，前置放大器，提高了仪器的测量精度，该仪器输出有串口和并口，容易实现快速记录和与上位计算机通讯。本仪器可通过圆柱三孔压力探针及速度管对空间气流的α角、总压、静压和速度进行测量，所以该仪器是一台多功能的测试仪。     

Using interchangeable virtual instrument (IVI) drivers to increasetest system performance

Instrument driver technology has evolved tremendously over the last decade. Initiatives such as SCPI and VXIplug&play have simplified remote instrument programming with standardized command messages and high-level utility functions. The latest initiative is the Interchangeable Virtual Instrument (IVI) Foundation. IVI defines standards for instrument drivers that offer benefits to provide higher performance. These benefits include instrument interchangeability, instrument simulation, and instrument state-caching. Because instrument drivers are an integral part of a modern test system, IVI promises to provide developers with the tools to increase their system performance significantly. This paper reviews the technical aspects of the IVI specification and the TVI architecture and describes how IVI can help the test system developer improve performance and lower long-term software maintenance costs     

Specifying an IVI class for digital test instrumentation

This paper presents an overview of work being done by Teradyne in conjunction with the IVI Foundation to specify an IVI class for digital instrumentation. The Interchangeable Virtual Instruments (IVI) Foundation was formed in August 1997 to define standard specifications for programming common test instrument capabilities. The paper will present the major architectural aspects of digital test instrumentation and how those features can be grouped into classes for the purpose of writing an instrument independent driver. Topics discussed will include derivation of capability classes, class extensions, simulation, and range checking. Examples of how the IVI digital class would apply to the Teradyne M9-Series Digital Test Instrument will be included. Conclusions will summarize the unique attributes of digital test instrumentation, the benefits which can be achieved through standardization, and the tradeoffs associated with utilizing class extensions     

Integrating VISA, IVI and ATEasy to migrate legacy test systems

New software technologies, such as VISA and IVI, continue to bring the industry toward greater standardization. The benefit to the integrator is reduced costs through reuse of the same hardware and software. The benefit to the customer end-user is lower costs by reducing modification and support through the life-cycle to the test station. However, while we position ourselves for the future with PXI and these software technologies, we must still provide support for VXI, GPIB, and instrument drivers that use current software technologies. Using a number of additional tools such as National Instrument's Measurement and Automation Explorer and Geotest's ATEasy, we can have the power of these tools today while waiting for wider acceptance and support of the newer VISA and IVI technologies. We are just now seeing the development of IVI drivers and the ink is still wet on the VISA specification for PXI. ATEasy provided the structure necessary to use these technologies with the current technology. This paper explores the process of implementing and integrating the system driver and instrument drivers for a PXI-based test station for the TOW2 optical sight sensor.     

IVI comes of age: An overview of IVI specifications with current status

IVI stands for Interchangeable Virtual Instruments; the IVI Foundation was formed in 1997 and is a consortium founded to promote standard specifications for programmable test instruments. The foundation focuses on the needs of users who build high performance test systems. By building on existing industry standards, such as VXIplug&play driver concepts, the Foundation's goal is to deliver specifications that simplify interchangeability, provide better performance, and maintainable test programs. To date, only a few IVI drivers have been available. In the past year, the IVI Foundation finished a major revision of it's architecture and has released a blizzard of specifications, increasing its IVI Class specification by 80% and dramatically improving the consistency and quality of released drivers. The DoD has expressed major interest in IVI's success. With the recent successful completion of the current set of specifications, DoD is interested in becoming involved in defining the next set of Class Specifications. The NxTest Working Group lists IVI as a key technical element, and DoD has recently requested that the IVI Foundation consider Electro Optical equipment for their next set of Class Specifications; a Working Group has been formed to more clearly define this activity.     

面向功能的测试设备驱动器设计与实现

在各种定制化测试设备中,由于很多仪器驱动不符合现有的标准,从而降低了测试软件的开发效率和质量.为此,提出了一种面向功能的测试设备驱动器的设计与实现方法.通过对特定类别测试设备所需实现功能的分析,获得了脱离硬件环境的功能项目集合,并建立了规范化的设备驱动接口.在驱动组件的内部,封装了对硬件仪器的控制,并描述了实际测试设备...     

基于S3C2440的触摸屏驱动程序实现

触摸屏作为人机界面的输入设备被广泛的应用于消费电子、工业控制等诸多领域.目前流行的嵌入式ARM处理器S3CC2440是一款典型的嵌入式SoC芯片,它提供了触摸屏控制器接口,方便了嵌入式软、硬件开发.简要介绍了S3C2440处理器,同时分析了触摸屏的硬件架构、硬件工作原理及与及其工作框图,在此基础上给出了触摸屏与S3C2440的硬件连接电路图.介绍了S3C2440下触摸屏的WinCE驱动构架,并指出相关注册表的修改技术.在S3C2440的嵌入式WinCE开发平台上,该驱动程序运行良好.     

Software architecture for building

Test system developers can benefit greatly from a software architecture that allows for easy interchangeability of instruments in those systems. Using open industry standard software architectures such as Virtual Instrument Software Architecture (VISA), and Interchangeable Virtual Instruments (IVI), developers are able to create systems with interchangeable test instrumentation. This paper describes the VISA and IVI software standards and demonstrates how their use within a broader software architecture, which includes standard development environments and flexible test executive software, facilitates the creation of interchangeable test systems