利用霍尔元件测量金属丝的弹性模量

Measuring Young modulus of wire with Hall element

将霍尔元件应用于拉伸法测弹性模量实验,直接测量了微小位移.结果表明,霍尔元件在均匀梯度磁场中霍尔电压与微小位移有良好线性关系,采用拟合法计算得到钢丝弹性模量为1.96×1011 Pa.

Hall element,instead of optical lever,was used to measure Young modulus of wire with stretching method.The micro-displacement was directly measured.The results showed that there was a good linear relationship between the Hall voltage and the micro-displacement when Hall element moved in a magnetic field of uniform gradient.The Young modulus of steel wire was measured to be 1.96×1011 Pa.