以尤拉公式为基础 ,依据摩擦轮的受力特点 ,分析了测量系统中绳轮摩擦传动时的纯滚动条件。结果表明 ,在材料及结构确定的情况下 ,纯滚动条件仅取决于包角。计算实例表明 ,纯滚动条件分析有利于减小测量系统的体积 Based on the Euler formula and based on the force characteristics of the friction wheel, the pure rolling condition of the frictional transmission of the sheave in the measuring system is analyzed. The results show that the pure rolling condition depends on the wrap angle only when the material and structure are determined. The calculation example shows that the pure rolling condition analysis is helpful to reduce the volume of the measuring system