共查询到20条相似文献,搜索用时 46 毫秒
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在分析溢流阀动态特性测试原理的基础上,设计了溢流阀动态特性测试虚拟仪器系统。此系统应用小波降噪的方法提高测试信号的质量,然后提取信号特征点,得到溢流阀动态特性的各项参数。 相似文献
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基于虚拟仪器技术的热处理过程监控系统的设计 总被引:1,自引:0,他引:1
本文主要介绍了利用虚拟仪器技术,在图形化编程语言LabVIEW环境下设计出软氮化连续炉监控系统.相对于传统的热处理监控仪表,该监控系统具有参数调节方便、自动化程度高、稳定性好、易实现、成本低等优点. 相似文献
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针对现有测量设备使用中存在的问题,基于虚拟仪器的思想,提出一种利用LabVIEW和现有设备构建智能化自动测试平台的方法。阐述了开放式虚拟仪器平台LabVIEW的特点,在此基础上开发了一个由计算机控制的数据采集系统,并对液压成形机拉伸力、拉伸位移等信号进行了实际采集。实验表明,本方法有利于提高数据采集的速度和准确性,并且具有较强的可移植性,可对多种测量对象进行测量。同时,基于LabVIEW的特点,本操作系统的可视化设计能详细具体的显示所需采集的实时数据,为实验提供详细的数据资料。 相似文献
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研究了基于虚拟现实的虚拟测试技术的概念和理论模型。根据车辆振动测试系统与基于虚拟现实的车辆振动虚拟测试系统之间的映射关系,提出了由虚拟现实子系统、模型子系统和虚拟仪器子系统构成的基于虚拟现实的车辆振动虚拟测试系统的框架设计及实现方法。设计了基于虚拟现实的车辆振动虚拟测试系统,并给出了车辆振动的虚拟测试结果显示,结果表明:基于虚拟现实的虚拟测试技术的理论模型适用于基于虚拟现实的车辆振动虚拟测试系统设计,通过该系统,用户可以分别在三种不同的观察模式下同时观察车辆的振动及其时域和频域信号。 相似文献
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从数控机床的误差分类、误差模型建立和误差检测装置等三方面综述了数控机床运动误差检测的研究。根据数控机床运动误差检测的实时性、高效性等特点,提出了“工件即基准”为核心的,基于虚拟基准的数控机床运动误差检测方案,该方案具有高柔度、不需要基准件,可实现在机检测等优点。 相似文献
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A virtual instrument(Ⅵ) was developed to monitor the technological parameters in the process of brush plating, including coating thickness, brush-plating current, current density, deposition rate, and brush plating voltage. Meanwhile two approaches were presented to improve the measurement accuracy of coating thickness. One of them aims at eliminating the random interferences by moving average filtering; while the other manages to calculate the quantity of electricity consumed accurately with rectangular integration. With these two approaches, the coating thickness can be measured in real time with higher accuracy than the voltage-frequency conversion method. During the process of plating all the technological parameters are displayed visually on the front panel of the Ⅵ. Once brush current or current density overruns the limited values, or when the coating thickness reaches the objective value, the virtual will alarm. With this Ⅵ, the solution consumption can be decreased and the operating efficiency is improved. 相似文献
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The microstructure formation and grains refinement of two Mg-based alloys, i.e. AZ31 and AZ91D, were reported using an electromagnetic vibration (EMV) technique. These two alloys were solidified at various vibration frequencies and the microstructures were observed. The average size of grains was quantitatively measured as a function of vibration frequencies. Moreover, the grain size distribution was outlined versus number fraction. A novel model was proposed to account for the microstructure formation and grain refinement when considering the significant difference of the electrical resistivity properties of the solid and the liquid during EMV processing in the semisolid state. The remarkable difference originates uncoupled movement between the mobile solid and the sluggish liquid, which can activate melt flow. The microstructure evolution can be well explained when the fluid flow intensity versus vibration frequency is taken into account. Moreover, the influence of the static magnetic field on texture formation is also considered, which plays an important role at higher vibration frequencies. 相似文献
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一种基于虚拟Agent市场的虚拟制造组织体系结构 总被引:4,自引:0,他引:4
文章主要利用多Agent系统理论和技术,建立一种面向虚拟制造组织(V irtualManufacturing Organi-zation,VMO)的基于Agent的企业信息模型和虚拟Agent市场(V irtualAgentMarket,VAM),进而架构一种基于VAM的VMO体系结构以支持处于网络经济环境中的制造企业/组织组建具有开放、分布式、扁平网络化组织形式和信息系统的VMO,并从原理上实现了一个VMO概念原型系统。 相似文献