双差分霍尔法微位移测定金属线胀系数  

Measurement of metal linear expansion coefficient by micro-displacement with double differential Hall method

作　　者：张文昭 唐鑫凌 刘志壮 王飞 周旺 李湘民 ZHANG Wen-zhao;TANG Xin-ling;LIU Zhi-zhuang;WANG Fei;ZHOU Wang;LI Xiang-min(School of Electronics and Information Engineering,Hunan University of Science and Engineering,Yongzhou,Hunan 425199,China)

机构地区：[1]湖南科技学院电子与信息工程学院电子信息工程系,湖南永州425199 [2]湖南科技学院电子与信息工程学院,湖南永州425199

出　　处：《大学物理》2021年第5期24-27,共4页College Physics

基　　金：2017年湖南科技学院科学研究项目“金属线胀系数测定方法的研究”(17XKY063);湖南科技学院应用特色学科建设项目资助。

摘　　要：金属线胀系数是金属的重要性能参数,精密测定其线胀系数在机械制造方面意义重大.本论文采用4个线性霍尔元件和3个仪表放大器构成双差分微位移传感器,采用该传感器测定金属的线胀系数.实验结果表明该传感器灵敏度高,线性度好,测量误差在±0.4%.The linear expansion coefficient is an important property of metal.Precise measurement of this coefficient is of great significance in mechanical manufacturing.In this paper,four linear Hall elements and three instrumentation amplifiers are used to form a double differential micro-displacement sensor,which is used to measure the linear expansion coefficient of metal.The experimental results show that the sensor has high sensitivity,good linearity and a measurement error of 0.4%.

关 键 词：金属 线胀系数 霍尔法 双差分 微位移 

分 类 号：O4-34[理学—物理]