大学物理 ›› 2021, Vol. 40 ›› Issue (5): 24-.doi: 10.16854 / j.cnki.1000-0712.190540

• 物理实验 • 上一篇    下一篇

双差分霍尔法微位移测定金属线胀系数

张文昭,唐鑫凌,刘志壮,王 飞,周 旺,李湘民   

  1. 湖南科技学院 电子与信息工程学院,湖南 永州 425199
  • 收稿日期:2019-11-22 修回日期:2020-09-06 出版日期:2021-05-20 发布日期:2021-05-17
  • 作者简介:张文昭( 1968—) ,女,湖南永州人,电子湖南科技学院电子信息工程系教授,硕士,主要从事电子技术和传感技术方面应用研究.
  • 基金资助:
    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) 以及湖南科技学院应用特色学科建设项目资助

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

ZHANG Wen-zhao,TANG Xin-ling,LIU Zhi-zhuang,WANG Fei,ZHOU Wang, LI Xiang-min   

  1. School of Electronics and Information Engineering,Hunan University of Science and Engineering,Yongzhou,Hunan 425199,China
  • Received:2019-11-22 Revised:2020-09-06 Online:2021-05-20 Published:2021-05-17

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%.

关键词: 金属, 线胀系数, 霍尔法, 双差分, 微位移

Abstract: The linear expansion coefficient is an important property of metal.Precise measurement of

this coeffi- cient is of great significance in mechanical manufacturing.In this paper,four linear

Hall elements and three instru- mentation 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%.

Key words: linear expansion coefficient, Hall method, double difference, micro-displacement