基于电磁感应原理测量物体角速度

Measurement of Angular Velocity Based on Electromagnetic Induction

提出了利用电磁感应原理测量旋转物体角速度的方法。首先利用运动转化机构,将物体的旋转运动转化为直线往复运动;利用磁铁切割线圈发电性质,使线圈产生周期性变化的电流;利用示波器显示电流随时间变化曲线,通过分析该曲线的极值特征得到随时间变化旋转角度的数据;最后利用逐差法对数据进行处理,得旋转物体角速度随时间变化曲线。

A method for measuring the angular velocity of a rotating object by using the principle of electromagnetic induction is proposed. First of all, the rotating motion of the object is converted into a straight-line reciprocating motion by using a motion conversion mechanism;the electric current of the coil is produced periodically by using the electric properties of the coil cut by a magnet;and the current change curve with time is displayed by using an oscilloscope, by analyzing the extreme value of the curve, the data of the rotation angle varying with time are obtained. Finally, the curve of the rotation velocity varying with time is obtained by processing the data with the successive difference method.