交流电感电桥法线胀系数测量实验仪
Physics Experimentation(2021)
Abstract
将微小位移量转换成交流电桥中双线圈的电感变化量,利用交流电桥的高灵敏度实现了微小位移量的精确电测.采用传感器、单片机及多个PTC电加热器对样品棒进行均匀控温,同时安装散热风扇可使测试装置迅速降温.实验中增加了交流电桥调节、磁芯位移量与输出电压信号定标、最小二乘法数据处理等内容.将交流电桥与固体线胀系数测量2个基础实验结合起来,丰富了实验内容.
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