摘要
为了解决磁致伸缩/压电复合磁传感器测量静态磁场时需要交变激励磁场以及磁电电压输出低等问题,提出了一种改进结构的磁致伸缩/压电/音叉复合谐振磁传感器,采用COMSOL有限元仿真软件对传感器的应力与应变分布以及音叉的振动模态进行仿真.结果表明,传感器的谐振频率随着磁场强度的增加近似线性递增;在0~1000 Oe磁场范围内,灵敏度达1.7505 Hz/Oe,是改进前的7倍,验证了传感器改进结构的有效性.
In order to solve the problems that an alternating excitation magnetic field is needed and the magnetoelectric voltage output is too low when a magnetostrictive/piezoelectric composite based magnetic sensor is used to measure the static magnetic field,a magnetostrictive/piezoelectric/tuning-fork composite resonant magnetic sensor with improved structure was proposed.In addition,the distribution of strain and stress of sensor and the vibration mode of tuning-fork were simulated with the COMSOL finite element simulation software.Results indicate that the resonant frequency of sensor increases almost linearly with the increasing magnetic field intensity.In the magnetic field ranging from 0 Oe to 1000 Oe,the sensitivity achieves 1.7505 Hz/Oe,which is 7 times higher than that before improvement.Furthermore,the effectiveness of improved sensor structure gets verified.
作者
李铭
卞雷祥
夏诗明
吴一凡
LI Ming;BIAN Lei-xiang;XIA Shi-ming;WU Yi-fan(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Quality Assurance Department,Guangdong Qingyuan Supervision Testing Institute of Quality and Metrology,Qingyuan 511518,China)
出处
《沈阳工业大学学报》
EI
CAS
北大核心
2020年第1期74-78,共5页
Journal of Shenyang University of Technology
基金
国家自然科学基金项目(61471197)
广东省质量技术监督局科技项目(2015ZPJ01)
清远市科技计划项目(2017A023)
关键词
磁致伸缩
压电
磁电
磁传感器
音叉
静态磁场
灵敏度
谐振频率
magnetostriction
piezoelectricity
magnetoelectricity
magnetic sensor
tuning-fork
static magnetic field
sensitivity
resonant frequency
