摘要
针对隧穿磁效应重力传感器中磁场干扰的问题,提出一种以高频脉冲磁场代替恒定磁场的磁干扰抑制方法。首先分析了隧穿磁效应重力传感器的工作原理,建立通电线圈磁场分布模型;其次,引入高频脉冲电流产生高频脉冲磁场以代替恒定磁场,建立磁场强度与输入加速度之间的数学模型,并设计了隧穿磁效应重力传感器的检测电路,推导了电路输出电压与输入加速度之间的数学关系式;最后利用ANSYS和Maxwell软件分别对隧穿磁效应重力传感器的模态和电磁抗干扰性能进行仿真。仿真结果表明:当存在环境地磁场、有加速度沿敏感轴正向输入时,高频脉冲电流激励下的磁场检测误差为0.791 9%,比直流激励下降低了4.167 2%。
Aiming at the problem of magnetic field interference in the tunneling magnetic effect gravity sensor,a magnetic interference suppression method in which a high-frequency pulse magnetic field is used instead of a constant magnetic field is proposed.Firstly,the working principle of the tunneling magnetic effect gravity sensor is analyzed,and the magnetic field distribution model of the energized coil is established.Then,a high-frequency pulse current is introduced to generate a high-frequency pulse magnetic field instead of a constant magnetic field.A mathematical model between the magnetic field intensity and the input acceleration is established.A detection circuit for the tunneling magnetic effect gravity sensor is designed,and the mathematical relationship between output voltage and input acceleration of the circuit is demonstrated.Finally,the modal and electromagnetic anti-interference performance of the tunneling magnetic effect gravity sensor are simulated by ANSYS and Maxwell.The simulation results show that when an ambient geomagnetic field is present and acceleration is input along the sensitive axis,the detection error of the magnetic field under high-frequency pulse current excitation is 0.7919%,which is 4.1672%lower than that under direct current(DC)excitation.
作者
罗海天
赵立业
沈翔
LUO Haitian;ZHAO Liye;SHEN Xiang(School of Instrument Science and Engineering,Southeast University,Nanjing 210096,China;Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology,Ministry of Education,Southeast University,Nanjing 210096,China)
出处
《传感器与微系统》
CSCD
北大核心
2021年第8期13-16,共4页
Transducer and Microsystem Technologies
基金
装备预研项目(31511040301)。
关键词
隧穿磁效应
重力传感器
磁干扰抑制
tunneling magnetic effect
gravity sensor
magnetic interference suppression
