共查询到20条相似文献,搜索用时 46 毫秒
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采用虚拟仪器技术,实现基于CAN总线的汽车数据采集系统开发。通过USBCAN卡将汽车的CAN信号发送至PC机,利用LabView软件完成上位机程序设计,实现数据流的解析,获取汽车的实时状态并记录错误信息,实现了汽车状态信息的提取、报警和存储,完成了车辆运行状态的实时监控功能。经过试验验证,本系统具有稳定可靠、操作简单、界面直观和可扩展性强等优点。 相似文献
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朱晓红 《机械设计与制造工程》2016,(10):52-55
针对传统仪表显示采用线束连接,导致汽车仪表系统的抗电磁干扰能力弱、准确率和精度等较低的问题,提出一种基于CAN无线总线技术的智能仪表系统。结合汽车仪表工作原理,根据智能仪表系统的功能需求,分别从硬件和软件方面对智能仪表系统进行设计;利用CAN无线通信技术实现汽车数据采集与不同电子器件的通信。最后,通过脉冲信号模拟对智能仪表系统进行测试,验证了该设计方案的可行性,为智能技术的应用提供参考。 相似文献
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基于VB与LabView的电力远程监测管理系统 总被引:2,自引:2,他引:2
电力远程监测管理是实现电力系统自动化的关键。研究了一种基于VB与LabView的新型电力远程监测管理系统,介绍了系统构成和基于VB与LabView的系统主站软件工作流程,阐述了系统的虚拟化测量结果处理和VB与LabView信息共享等关键技术。 相似文献
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介绍了以LabView为软件平台,运用LabView功能强大的工具包,设计编写控制工程基础课程的实验程序.将LabView用于分析经典控制理论中控制系统的PID校正以及根轨迹的绘制.实践表明,虚拟仪器环境下对自动控制系统进行分析与综合具有界面友好,实现方便等优点,同时体现了虚拟仪器软件强大的数据处理能力和便捷的图形化编... 相似文献
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P. S. Venkataramani R. D. Srivastava S. L. Kalra H. C. Srivastava 《Lubrication Science》1987,4(4):307-319
Precision instrument mechanisms require highly specialized oils. These stringent requirements limit the choice of lubricants to synthetic types only. In this paper the physico-chemical and peformance characteristics of a watch oil developed by the authors have been discussed to show how it meets the basic requirements of watch oils, and compares favourably with widely accepted watch oils. Where the test methods and test limits are at variance with the specification IS: 1088–1975 for watch and clock oils, commentary is given and suitable recommendations for modifying IS: 1088–1975 are made. 相似文献
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We describe the design of an instrument that can fully implement a new nanopatterning method called ice lithography, where ice is used as the resist. Water vapor is introduced into a scanning electron microscope (SEM) vacuum chamber above a sample cooled down to 110 K. The vapor condenses, covering the sample with an amorphous layer of ice. To form a lift-off mask, ice is removed by the SEM electron beam (e-beam) guided by an e-beam lithography system. Without breaking vacuum, the sample with the ice mask is then transferred into a metal deposition chamber where metals are deposited by sputtering. The cold sample is then unloaded from the vacuum system and immersed in isopropanol at room temperature. As the ice melts, metal deposited on the ice disperses while the metals deposited on the sample where the ice had been removed by the e-beam remains. The instrument combines a high beam-current thermal field emission SEM fitted with an e-beam lithography system, cryogenic systems, and a high vacuum metal deposition system in a design that optimizes ice lithography for high throughput nanodevice fabrication. The nanoscale capability of the instrument is demonstrated with the fabrication of nanoscale metal lines. 相似文献
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谭超 《工业仪表与自动化装置》2005,(2):57-58,48
介绍了基于虚拟仪器技术的温差测定仪及在燃烧热实验中的应用,该虚拟温差测定仪不仅在测量精度、自动化程度和成本方面是传统温差仪无法相比的,而且还具有自动数据处理、多通道同时测量、整个系统一次性标定、便于系统集成等优点。 相似文献
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Mott PH Twigg JN Roland DF Schrader HS Pathak JA Roland CM 《The Review of scientific instruments》2007,78(4):045105
A novel high-speed tensile test instrument is described, capable of measuring the mechanical response of elastomers at strain rates ranging from 10 to 1600 s(-1) for strains through failure. The device employs a drop weight that engages levers to stretch a sample on a horizontal track. To improve dynamic equilibrium, a common problem in high speed testing, equal and opposite loading was applied to each end of the sample. Demonstrative results are reported for two elastomers at strain rates to 588 s(-1) with maximum strains of 4.3. At the higher strain rates, there is a substantial inertial contribution to the measured force, an effect unaccounted for in prior works using the drop weight technique. The strain rates were essentially constant over most of the strain range and fill a three-decade gap in the data from existing methods. 相似文献