用智能手机在气垫导轨上测量磁阻尼系数  

Using Smartphone to Test the Magnetic Damping Coefficient on the Air Track

作　　者：时雯 程敏熙[1] 纪煦 SHI Wen;CHENG Min-xi;JI Xu(South China Normal University,Guangdong Guangzhou 510006)

机构地区：[1]华南师范大学,广东广州510006

出　　处：《大学物理实验》2018年第5期21-24,共4页Physical Experiment of College

基　　金：广东省高等教育学会实验室管理专业委员会2016年度研究基金项目(GDJ2016055);2017年华南师范大学教学改革项目

摘　　要：将智能手机固定在两面贴有磁片的滑块上,让滑块在气垫导轨上运动来进行磁阻尼系数的测量。智能手机上没有直接测量速度的传感器,但有加速度传感器,因此使用手机软件"Sensor Kinetics"测量瞬时加速度,再用Origin将a-t图象积分求出瞬时速度,拟合曲线从而得到该系统的磁阻尼系数。The smartphone was fixed on a slider with magnetic sheets on its two sides.The magnetic damping coefficient was measured through the slider moving on the air track.There is no sensor to test velocity in the smartphone,but there is acceleration sensors in it.A software named ＂Sensor Kinetics＂ in smartphone can be used to measure the instantaneous acceleration and to draw an a-t figure.The instantaneous velocity was worked out by using the tunetion of integrate of Origin.The magnetic damping coefficient of the system was calculated by fitting the curve.The relationship between magnetic damping coefficient and intensity of magnetization was verified.

关 键 词：磁阻尼系数 气垫导轨 智能手机 ORIGIN 

分 类 号：O4-33[理学—物理]