霍尔效应在线膨胀系数测量中的应用

Application of Hall Effect to Measure Linear Expansion Coefficient

利用霍尔元件在梯度磁场中移动时输出的霍尔电压与移动距离成正比的特性,把微小位移转换成霍尔电压变化,从而精确测量出金属线膨胀系数.此法测量精确,操作简单.

The hall element has the characteristic that the output of the hall voltage is proportional to the distance when moving in the gradient magnetic field. The tiny displacement was transformed to the change of the hall voltage,so as to accurately measure the metal linear expansion coefficient. The method of measuring was precise,the operation was simple.