摘要
针对咸潮等海水低电导率环境的测量,本文提出了一种基于磁谐振和电涡流技术的单线圈测量模型。建立了适用于单线圈磁谐振的海水涡流等效耦合电路模型,从理论上分析了涡流损耗对电路参数的具体影响,采用理论与仿真对比的方式,分析了串联、并联两种谐振方式对海水电导率测量效果的影响,证明了并联负载电压虚部变化较串联时更加稳定。搭建单线圈海水电导率测量系统进行了实验室试验,试验结果表明,回路谐振对海水涡流具有明显的增强效应,谐振时负载电压随电导率增长而呈线性变化,且并联谐振方式在测量中效果优于串联谐振方式。磁谐振式单线圈模型具备海水电导率测量的可行性,在低电导率、非接触式传感器方向具有良好的发展前景。
For the measurement of seawater low conductivity environments such as salty tide,this paper proposes a single-coil measurement model based on magnetic resonance and eddy current technology.An equivalent coupled circuit model of seawater eddy current applicable to single-coil magnetic resonance is established,and the specific influence of eddy current loss on the circuit parameters is theoretically analyzed.The influence of series and parallel resonance on seawater conductivity measurement is investigated by comparing theory and simulation,and it is proved that the variation of the imaginary part of the voltage of the parallel load is more stable than that of the series resonance.The single-coil seawater conductivity measurement system was built for laboratory tests,and the test results show that the loop resonance has an obvious enhancement effect on seawater eddy currents,the load voltage at resonance varies linearly with the growth of conductivity,and the parallel resonance method is better than the series resonance method in the measurement.The magnetic resonance single-coil model has the feasibility of seawater conductivity measurement and has a good development prospect in the direction of low conductivity,non-contact sensors.
作者
冯书艺
刘宁
王韬
Feng Shuyi;Liu Ning;Wang Tao(Nation Ocean Technology Center,Tianjin 300112,China)
出处
《电子测量技术》
北大核心
2024年第12期37-43,共7页
Electronic Measurement Technology
基金
天津市自然科学基金(23JCYBJC00590)项目资助。
关键词
电导率测量
磁谐振
涡流损耗
无损测量
conductivity measurement
magnetic resonance
eddy current loss
non-destructive measurement
