焦利氏秤测量液体表面张力系数实验改进  

Improvement of the Experiment of Measuring Surface Tension Coefficient by Jolly Scale

作　　者：吴魏霞[1] 史萍 张孟佳 李福芸[1] 张翱[1] 孙兆永 WU Weixia;SHI Ping;ZHANG Mengjia;LI Fuyun;ZHANG Ao;SUN Zhaoyong(School of Basic Education,Beijing Institute of Graphic Communication,Beijing 102600,China;School of Printing and Packaging Engineer,Beijing Institute of Graphic Communication,Beijing 102600,China)

机构地区：[1]北京印刷学院基础教育学院,北京102600 [2]北京印刷学院印刷与包装工程学院,北京102600

出　　处：《大学物理实验》2022年第6期63-66,共4页Physical Experiment of College

基　　金：2021北京高等教育“本科教学改革创新项目”(202110015002);教育部高等学校大学物理课程教学指导委员会项目(DWJZW202110hb);北京印刷学院校级重点教学改革项目。

摘　　要：对我校大学物理实验项目“焦利氏秤测量液体表面张力系数”进行改进,其中将容易变形的门形丝改为不易变形且形状规则的长方形卡片或空心圆柱桶;将焦利氏秤上的长度刻度改为直接可读的微小力刻度,并采用动态摄影技术,通过慢放精准定位读出力的大小。此改进方法不仅降低了操作难度,简化了实验过程,最重要的是减小了读数和测量结果误差。“Measuring surface tension coefficient of liquid by Jolly scale”is a basic project in the university physics experiment,which uses the pull-out method to measure the tiny force of surface tension.Among them,it is difficult and complex to keep the‘hree-line alignment’all the time,and the gate wire which is used in the experiment is easy to deform,which makes the artificial reading very inaccurate.In view of this situation,the experiment is improved by changing the gate wire that is easy to deform into a rectangular card and hollow cylindrical barrel that are not easy to deform and have regular shapes.The length scale on the Jolly scale is changed to the direct readable micro force scale,and the dynamic photography technology is adopted to accurately locate the force by slowing down.Thus this improvement reduces the operation difficulty,simplifies the experiment process,and makes the reading more accurate.

关 键 词：表面张力系数 拉脱法 焦利氏秤 

分 类 号：O441.5[理学—电磁学]