2) the cable eccentricity
电缆偏芯
1.
Abstract: This paper introduces interface circuit between PIC single chip and lattice LCD module FM240128A, and designs of program in the measurement of the cable eccentricity.
针对电缆偏芯测量系统中图文显示的技术问题,利用PIC系列单片机和点阵式液晶显示模块FM240128A,构建硬件接口电路,开发软件程序,提出程序设计中动态图文显示问题的一种解决方案,最终使整个测量系统的显示部分具有最佳实时性、灵活性。
3) single core cable
单芯电缆
1.
The structure and main functions of single core cable were presented.
阐述了单芯电缆的结构及各部分的主要作用,分析了护层接地的原理,介绍了此接地方式在邯钢电缆线路上的实际运行。
4) single cable
单芯电缆
1.
High speed down-hole transmission technology of video data with a single cable is introduced in this article.
文章介绍了单芯电缆高速传输井下视频数据技术的电路实现。
2.
The technology principle and circuit realization are introduced for pulse signal transmission through single cable.
介绍了用单芯电缆传输脉冲信号的技术原理和电路实现 ,分析了实现电路的耐压性能和传输性能。
5) single conductor cable
单芯电缆
1.
According to the high current in the overhead contact line system (OCS) in the high speed railway lines, the induced voltage in metallic sheath of the single conductor cable was calculated with the effect of electric loops along the electrified railways taken into consideration.
高速铁路建设中,接触网系统出所馈线采用单芯电缆。
2.
A transmission scheme using single conductor cable in a Carbon/Oxygen logging tool is developed to meet the requirement of replacing conversional 7-conductor cable by single conductor cable.
针对测井电缆由7芯改为单芯的需要,提出了一种碳氧比测井仪单芯电缆传输方案。
6) single-core cable
单芯电缆
1.
Consequently,the thermal time constant of single-core cable was introduced,transient thermal circuit models of cable body and its ambient medium were established,and the simplified equivalent ones were given.
为此,以单芯电缆为研究对象,介绍了电缆热时间常数;建立了电缆本体及周围介质的暂态热路模型并进行简化等效;计算了空气敷设和直埋敷设单芯电缆的热时间常数;并在试验现场进行了阶跃电流下的单芯电缆温升试验,通过对实测导体温度暂态过程的曲线拟合求得了电缆实际的热时间常数,验证了理论计算的正确性。
2.
Ampacity tests of the single-core cable are done in State Grid Electric Power Research Institute to conpare the detected cable temperature with the calculated, showing that they are basically in coincidence.
建立了基于IEC 60287电缆载流量计算的迭代算法;用此算法计算典型电缆线路的载流量与IEC算法的结果比较,两者相近,但迭代算法的精确度和适用范围都比IEC算法要好,理论上验证了迭代算法的正确性;在国网电科院进行单芯电缆载流量试验,将电缆各层温度和层间温差的实测值与迭代计算值比较,发现两者基本吻合。
3.
Recurrence formulas of transient temperature rise of its conductor only considering current change and only considering jacket temperature change are both derived to obtain the integrated superposition formula of calculating transient temperature of single-core cables.
为此,在电缆外皮温度监测的基础上,建立了单芯电缆暂态热路的数学模型;分别推导出只考虑电流变化和只考虑表皮温度变化两种情况下的暂态温升递推公式,进而推导出单芯电缆暂态温度的完整叠加公式;并采用经典4阶Runge-Kutta法求解微分方程组计算电缆本体温度。
补充资料：在AutoCAD中偏心圆锥与偏心圆台实体的画法
现在要画一个偏心圆锥,底面在WCS的XY平面上,圆心(0,0,0),半径100,顶点(300,0,400)在ZX平面上.
1)连接PA,PB. A(-100,0,0) B(100,0,0)
图1
在当前坐标下:
2)延长PA到C,使PA=CA;延长PB到D,使PB=DB;
3)连接CD;
4)以CD为直径画圆;
5)用XLINE命令中的二等分选项作角CPD的角平分线PO,交CD于O;
6)过O作CD的垂线,交圆于E,F;
图2
7)用三点UCS命令,取三点为:O,P,C;
8)过点O作PO的垂线GO,交PC于G;
图3
9)再次用三点UCS命令,取三点为O,F,G;
10)现在就可以画椭圆锥了!
cone-e-c-捕捉O点-捕捉F点-捕捉G点-a-捕捉P点;
图4
11)回到WCS,剖切椭圆锥
SL-选择椭圆锥-回车-XY-回车-捕捉P点.
12)删除辅助线条.
图5
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条