基于杠杆原理的测量液体表面张力系数新方法

A New Method of Measuring Liquid Surface Tension Coefficient Based on Lever Principle

介绍了基于杠杆原理测量液体表面张力系数的方法。该方法针对常见的焦利氏秤测量液体表面张力系数的不足,提出用杠杆法放大示数,用升降台拉脱铁丝的方式测量液体表面张力系数,并借助数码设备进行录制读数;同时在装置探究性方面做出改进,探究不同形状铁丝测量液体表面张力系数的区别。实验研究和分析发现,相比于常用的焦利氏秤拉脱法,用杠杆法测量的蒸馏水液体表面张力系数具有精度更高、装置探究性更好、成本需求更低、可操作性更强等优点。

It introduces the method of measuring the liquid surface tension coefficient based on the principle of lever.This method aims at the deficiency of measuring the surface tension coefficient of the liquid by the common Joliet scale.It is proposed to use the lever method to magnify the indication,measure the surface tension coefficient of the liquid by pulling the wire off the lifting table,and record the reading with the help of digital equipment;Improvements were made in the exploratory aspects,and the difference in the surface tension coefficient of liquids measured with different shapes of iron wires was explored.Experimental research and analysis have found that,compared with the commonly used Joule scale pull-off method,the surface tension coefficient of distilled water liquid measured by the lever method has higher accuracy,better device exploration,lower cost requirements,and stronger operability advantage.