摘 要:目前落球法测液体粘滞系数大多采用秒表计时,其计时精度不够准确,即按秒表时动作与落球初始及结束时刻难以同步,而且难以准确判断小球何时进入匀速运动状态。因此本论文决定利用摄像机拍摄小球下落过程,然后用电脑软件分析录像,便可清晰地观测到任意时间的小球位置,从而精确求出小球的收尾速度,大大减少实验误差。8461
关键词:液体粘滞系数;落球法;改进
The improved measurement of viscosity of liquid by using the falling ball method
Abstract: Currently, the viscosity of liquid was measured by a falling ball method using a stopwatch, but its timing accuracy is not accurate enough. Moreover, it is difficult to estimate the uniform velocity state of the falling ball. Therefore, in this article the camera was used to shoot the drop process of falling ball. By analyzing the observed videos at any time to observe the ball position clearly and the direct change of speed of the falling ball. So the uniform velocity speed of the falling ball can be calculated with high accuracy, and then the experimental error can be greatly reduced.
Key Words:Viscosity of liquid; falling ball method; improvement
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