数字存储示波器辅助测量重力加速度  

Measuring acceleration of gravity by digital storage oscilloscope aided

作　　者：陈东生[1] 吴斌[1] 刘耀昌[1] 王颖[1] 

机构地区：[1]上海电力学院数理学院,上海200090

出　　处：《大学物理》2013年第2期40-42,共3页College Physics

摘　　要：当具有磁性的物体靠近或远离闭合线圈时,由于线圈中磁通量的变化,在其内部会产生感生脉冲信号,借助数字存储示波器实时采集该脉冲信号.分析该信号的时间间隔即可获得物体下落的时间,从而计算出重力加速度以及验证物体自由落体的运动规律.When object with a magnetic is close to or away from the coil, pulse signal is induced in the coil due to the variation of magnetic flux. Digital storage oscilloscope is used to collect the pulse signal. The falling time of object can be obtained by analyzing the number of intervals of pulse signals. Thus, the value of acceleration of gravity can be gained and the motion law of free fall is verified.

关 键 词：数字存储示波器 感生脉冲信号 重力加速度 自由落体 

分 类 号：O423[理学—声学]