双差分霍尔法微位移测定金属线胀系数
收稿日期: 2019-11-22
修回日期: 2020-09-06
网络出版日期: 2021-05-17
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
Received date: 2019-11-22
Revised date: 2020-09-06
Online published: 2021-05-17
张文昭, 唐鑫凌, 刘志壮, 王 飞, 周 旺, 李湘民 . 双差分霍尔法微位移测定金属线胀系数[J]. 大学物理, 2021 , 40(5) : 24 . DOI: 10.16854 / j.cnki.1000-0712.190540
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%.
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