【作者】 朱涛；

【导师】 蒋炎坤；

【作者基本信息】 华中科技大学 ， 动力工程， 2011， 硕士

【摘要】 在进行微波暗室性能测试时,其测试支架起着至关重要的作用。本文从工程实际需要出发,对其测试支架及其控制系统进行设计和分析。本测试支架有效工作范围为水平面内横向(X方向)运动3m,纵向(Y方向)运动3m,垂直方向(Z方向)运动6m的立体空间,可同时采集三个通道的电磁信号。测试支架的主体材料为重量轻、强度大的MC尼龙及环氧玻璃布层压板,以尽量降低由于反射对空间电磁信号分布测量所带来的影响。测试支架各运动平台沿每个方向轨道的运动是通过平台转动轴上的齿轮与轨道齿条啮合来实现的,转动轴上齿轮的驱动力由步进电机经齿轮减速后提供。测试支架各零部件的设计均参照相关技术标准进行,为确保安全性,对一些关键部件进行了有限元强度分析,为系统的可靠性提供了依据。在上述工作基础上,完成了该系统的设计与制造。同时,以NI数据采集卡为硬件基础,结合LabVIEW图形化开发平台,开发了控制和测量系统软件,能自动完成信号采集、数据处理、曲线拟合、图形化显示等功能,并能实现试验报告的自动生成。更多还原

【Abstract】 The test bench plays a vital role,while conducting the performance test of anechoic chamber. According to the actual needs of project, this paper designs and analysises the test bench and control system.This testing bench which can collect electromagnetic signals form three channels has an effective working scope of stereo space for in horizontal lateral (X direction) movement 3m, longitudinal (Y direction) movement 3m and in vertical direction (Z direction) movement of 6m.Trying to reduce the impact of the reflection brings to the space distribution of electromagnetic signals, the main materials of the testing bench consist of light but strong MC nylon and laminated epoxy glass plate. The bench’s motion in the track of all directions is through the meshing of gear rack and the gear on the bench rotation axis, and a stepping motor gives the gear on the bench rotation axis the driving forces through a gear reducer.Each part of the bench is designed according to the relevant technical standards, but in order to guarantee safety, this paper uses the finite element method to analysis the strength of some key components of the bench ,which provides further evidence to the reliability of the system.Based on the above work,completed the design and manufacture of the system.When completing the design and manufacturing of the testing bench, at the same time, based on the hardware of NI data acquisition card, combining the LABVIEW graphical user interface, this paper develops a control and measurement software, which can automatically accomplish signal acquisition, data processing, curve fitting, graphical display function, and it can also automatically generate test report.更多还原