基于磁弹性膜片位置变化对检测信号的影响分析  

Analysis on influence of magnetoelastic membrane positionchange on detecting signal

作　　者：周德强 王华 陈德文[3] 曹丕宇[1,2] ZHOU Deqiang;WANG Hua;CHEN Dewen;CAO Piyu(Key Laboratory for Advanced Food Manufacturing Equipment Technology of Jiangsu Province,Wuxi 214122,China;School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China;National Center of Quality Supervision and Inspection for Commodity,Yiwu 322000,China)

机构地区：[1]江苏省食品先进制造装备技术重点实验室,江苏无锡214122 [2]江南大学机械工程学院,江苏无锡214122 [3]国家日用小商品质量监督检验中心,浙江义乌322000

出　　处：《传感器与微系统》2020年第3期10-13,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(51107053);江苏省食品先进制造装备技术重点实验室基金项目(FM-201806);浙江省科技计划资助项目(2015C32108)。

摘　　要：针对激励信号的直流偏置与磁弹性膜片相对于线圈的位置会对检测结果存在着一定影响,开展对激励信号的直流偏置与磁弹性膜片在线圈中的不同位置进行了试验研究。试验结果表明:磁弹性膜片在线圈中部时的共振频率明显小于磁弹性膜片处在线圈两端时的共振频率,其共振频率的差值可以达到0.9 kHz,因此位置的变化对检测结果有着较大的影响;质量引起的共振频移与传感器基频呈线性关系,因此基频较高时,传感器的灵敏度较高。As the position of the magnetoelastic ribbon relative to the coil has a certain influence on the detecting result,different positions of the magnetoelastic ribbon in the coil are experimentally studied.The experimental results show that the resonant frequency of the magnetoelastic ribbon in the middle of the coil is significantly smaller than the resonant frequency of the magnetoelastic ribbon at the ends of the coil,and the difference of the resonant frequency can reach 0.9 kHz,which means the positon have a significant effect on the detecting result.The resonance frequency shift caused by mass has a linear relationship with the fundamental frequency of the sensor.Therefore,when the fundamental frequency is high,the sensitivity of the sensor is high.

关 键 词：磁弹性传感器 共振频率 直流偏置 频率测量 

分 类 号：TP212.3[自动化与计算机技术—检测技术与自动化装置]