超磁致伸缩力传感器及其实验研究

基于磁致伸缩逆效应原理,以超磁致伸缩棒为敏感元件研究了一种具有高灵敏度的新型超磁致伸缩力传感器,通过集成在结构内部的霍尔传感器测量磁通密度来实现静态力的测量.同时,为了提高传感器的测量灵敏度,提出了一种安装在霍尔传感器周围的不锈钢钢环的特殊结构.给出了超磁致伸缩力传感器的测量原理和设计过程,并通过实验研究确定了偏置磁场、预紧力和超磁致伸缩棒的尺寸等因素对传感器输出特性的影响规律,分别得到了传感器工作的最佳偏置磁场和预紧力,为超磁致伸缩力传感器的深入研究和精确控制提供了一种技术途径.

Giant magnetostrictive force sensor and its experimental study

Based on the inverse magnetostrictive effect,a new type of giant magnetostrictive force sensor with high sensitivity which uses a giant magnetostrictive materials rod as the sensitive element is studied.The static force measuring is realized by a Hall sensor measuring magnetic flux density integrated in the structure.In order to improve sensor′s measuring sensitivity,a special structure which is a stainless steel ring around Hall sensor is proposed.The measuring principle and design process of giant magnetostrictive force sensor are presented.The influence law of bias magnetic field,pre-tightening force,rod length and other factors on sensor′s output characteristics is determined by experiments.Optimal bias magnetic field and pre-tightening force are obtained.It lays a foundation of the further study on giant magnetostrictive force sensor and accurate control.