用磁铁释放拾取钢球的液体黏度测量仪

Measuring instrument of viscosity coefficient of liquid by using magnet to release and collect steel ball

研制了一种液体度测量仪.用锥形磁铁吸持和释放钢球使钢球沿量筒中心轴线下落,用磁棒拾取钢球使钢球免清洗重复使用,采用专门设计的量筒盛待测液体.分析了收尾速度计时起点的位置,并用MATLAB计算讨论.实验结果表明,该测量仪测量准确,不产生油污,操作简单方便.

An instrument for measuring viscosity coefficient of liquid is developed.A taper magnet is used to hold and release the steel ball,and then the steel ball can fall along the cylinder＇s axis.A bar magnet is used to pick up the falling steel ball and make the steel ball be reused without washing.A measuring cylinder is also specially designed to contain the measured liquid.The starting timing-position of the terminal velocity of the steel ball is theoretically analyzed,and tts numerical calculation is performed by the use of MATLAB software. The experimental results show that this instrument has advantages of high accuracy,no oil-pollution and simple operation.