电缆线长度公式的模型改进

Improving the Model of Tormula of the Cable Line Length

一个“工”型轴架缠绕了一定量的电缆线,许多资料采用累加“圆环”法求出长度,这与实际结果有误差,分析电缆线的缠绕方式,用圆柱螺线的弧长公式计算比较接近。

There are many cable lines of spool thread twisting around the axle. People use the method of accumulating cirgues to count length in which there is an error. It has an error between the result and the fact. Analysing the manner of twisting the cable line, it is better to count the length of cylinder-spiral by the use of the formula of arc-length in the awelysis of twisting the cable line.