多管落球法测液体黏度实验的探讨

Discussion of Measurement of Viscosity of Liquid Using Falling Balls with Many Pipes

多管落球法测液体黏度实验,关键是测定满足无限宽广条件下小球下落的时间。针对该实验常用的作图法徒手画线,随机性很大,很难准确测量的问题。文章对多管落球法测液体黏度实验的数据处理作了改进,介绍了作图法、逐差法、最小二乘法并相互比较,得出了逐差法是最好方法的结论。

The key to the measurement of viscosity of liquid using falling balls with many pipes is to measure the falling time satisfying the condition of boundless. The way to use the graphical representation of data before to draw llne is at most random and surveying is not accurate. Regarding this, this paper improves the way to deal with data of this experiment, and introduces the graphical representation of data, the method of progressive difference, the least square method, and contrast each other and reaches a conclusion that the method of progressive difference is the best way.