本文基于VBA编程语言,利用LAN网络接口在计算机与智能电桥之间进行数据传输,设计了通信电缆电阻测试软件,实现通用办公软件对测试结果的自动记录、数据处理、生成测试报告的功能.该方法使用日常办公软件,开发成本低,易于实现,也可应用于同类系统.

应答器传输单元(BTM)是动车运行控制系统的一部分,BTM车载射频同轴电缆组件主要用于信号的接收和传输,该组件必须满足动车在各项复杂环境中长期安全运行的要求,因此,不仅对电缆的传输性能提出更新更高的要求,更是对电缆的无卤低烟阻燃性能提出了较高要求.本文设计了一种阻燃B1级BTM车载射频电缆组件,并进行了试验验证,试验结果表明产品传输性能符合客户要求,阻燃性能通过GB/T31247-2014《电缆及光缆燃烧性能分级》B1级试验,保证产品了信号接收和传输的一致性,有效的减少故障延迟,且良好的阻燃性能更进一步保障动车组的运行安全.

本文从绝缘电阻理论出发,分析了与绝缘电阻性能相关核心因素,结合通信电缆产品生产特点,提出产品设计、生产制造控制过程中的注意事项,提高了通信电缆绝缘电阻性能,并通过正确的评价,为提供优质可靠的通信电缆服务.

利用CMOS数字集成电路设计了一种快速检测电路,包括脉冲发生电路、自动扫描电路、状态指示电路和自检控制等4个部分.基于此快速检测电路制作检测装置,对新型定日镜推杆电缆组件的混线、断线、线序进行检测.该方法线路结构简单,检测效率高,易于实现,也可用于其他类似电缆及组件的检测.

In this paper, by measuring the ideal shielding coefficient of communication cable with different structure forms of cable shielding layer, the ideal shielding coefficient curve is obtained. The influence of different materials, different shielding material thickness and different steel strip permeability on the shielding coefficient of communication cable is analyzed, and the shielding performance of cable is improved with the increase of the thickness of aluminum tube sheath. The shielding effect of steel tape with high permeability is better than that of ordinary steel tape. This experimental result provides data support for the design and technology of communication cable with high requirement of ideal shielding coefficient. And through the analysis of the ideal shielding coefficient and sheath voltage curve, the requirements of the ideal shielding coefficient of some cables on the market and the parameters of factory products have a basic evaluation, so as to select the appropriate shielding steel strip type and aluminum tube thickness, control the shielding coefficient performance, fundamentally solve the problem that the ideal shielding coefficient of communication cable is not up to the expectation.

应答器数据传输电缆可靠的电路状态判断信息,影响到列车的运行安全,我们对电缆开、短路以及正常状态的电流变化进行试验,结果发现,随着电缆长度的变化,出现了电缆开路、短路电流几乎相等现象,此时无法正确识别电缆开、短路状态.为了探究此现象,我们从电缆本身传输特性进行试验研究.