【作者】 王春婷；

【导师】 韦尧兵；

【作者基本信息】 兰州理工大学 ， 机械制造及自动化， 2007， 硕士

【摘要】 随着现代科学技术和现代工业生产的发展，对电子测量和仪器技术的要求越来越高，测试内容和测试对象日趋复杂，测试工作量与日俱增，对测试速度和测试精度的要求不断提高，这使得传统的人工测试己经不适应甚至不能满足实际测试的需求。作为仪器技术和计算机技术完美结合的虚拟仪器技术为测试工程师带来了绝好的解决方案。利用虚拟仪器技术，工程师只需将需要测量的信号通过I／O接口设备采集后送入计算机，再利用虚拟仪器开发工具和计算机强大的数据分析、处理和保存功能以及显示器的显示能力，就能很容易地设计出一个满足专门测试需求的虚拟仪器系统。本文研究的是一个测试轴瓦高出度及轴瓦对口面平行度的虚拟测试系统。轴瓦是影响机车柴油机性能的一个重要部件，而轴瓦高出度和对口面平行度又是轴瓦的两个重要参数，它们的大小不仅影响到轴瓦自身的寿命，也会影响到柴油机工作的安全性和可靠性，为提高整机性能，对轴瓦高出度、平行度的测试是十分必要的。本文针对传统指针仪表用手动方式来完成轴瓦高出度、平行度测试存在的不足之处，提出了基于虚拟仪器的轴瓦测试系统。基于虚拟仪器的轴瓦测试系统采用双摆动压块测量模型方法、应用激光测量技术、PCI总线接口方式对轴瓦高出度、对口面平行度进行测试。本测试系统以一台PC机、一个激光位移传感器和一块数据采集卡为硬件核心，采用美国NI公司的图形化虚拟仪器编程环境LabVIEW7.1为开发工具，将所有硬件整合为一个功能完善的自动测试系统。用户只需点击一个按钮就可以发出测试命令，很快就能得到一组测试结果。本测试系统采用模块化编程方式，提高了系统的扩展性。当系统添加新功能时，只需要在程序中添加此项内容即可执行编制好的程序，而不需要对整个程序都做很大的改动。这使得系统的扩充十分方便，充分体现了“软件就是仪器”所带来的优越性。传统的测试系统只能在本地进行测试和结果输出，本文研究的系统运用了NI公司的DataSockte技术，使得整个系统具备了网络功能。通过网络，用户可以在任何地点通过浏览器方便地获得测试结果。DataSockte的应用使整个系统提升成为一个远程虚拟仪器系统。更多还原

【Abstract】 As the rapid development of modern technology and industrial production, the requirement for measuring system and instrument meets a new high. The content and object for testing is getting more and more complicated. As a result, the workload is increased and the cry for velocity and accuracy is inevitable. Thus, the traditional manual testing can’t meet the requirement. As the perfect combination of instrument technique and computer technology, the virtual instrument technique brings the better solution for testing engineers. Through the virtual instrument technique, the only thing the engineer need to do is to transfer the testing data selected from I/O interface device to the computer and using the virtual exploit tool and data postprocessor function of computer to design out the special testing system easily. This paper is focused on the virtual testing system of bearing bush for depth of parallelism and height.The bearing bush is an important component which will influence the performance of diesel deeply, and the depth of parallelism and height is two important parameters, the size of them will not only influence the lifespan of bearing bush, but also will influence the security and reliability of diesel. In order to improve the performance of complete appliance, the testing for the bush bearing is necessary. In this paper, aim to the problem of testing for conventional instrument by hand, bearing bush testing system based on virtual instrument is presented.The bearing bush system based on virtual instrument uses double pendulum & dynamic pressure measuring method, laser measuring technique and PCI bus interface to test for the depth of parallelism and height. The core hardware is facilitated with one PC, two displacement sensing device and one data collecting card. The exploitation tool is coming from the virtual instrument environment of LabVIEW7.1 of NI Company in America. The hardware will be incorporated into one automation testing system. The work need user to do is to pick the button, then the result will come out quickly. Modular program is used for the testing system and the augmentability of the system is improved. When new function is increased, we only need to increase this function to the program, the canned program is able to be executed, and not need to change the whole program largely. Which make system expansion convenient and embody the superiority what "software is instrument".The traditional testing system is only used in local place to monitor and output. The system studied here is provided with DataSocket from NI, which make the systemhave network function. By network, the user can conveniently get testing result through web in any place. So the application of DataSocket technique supports the whole system to be a remote virtual instrument.更多还原