基于磁谐振测量海水电导率的模型分析

Model analysis of seawater conductivity measurement based on magnetic coupling resonance

针对咸潮在线监测问题,提出了一种基于磁耦合谐振技术的海水电导率测量模型,从不同角度分析了海水涡流对磁耦合谐振系统的影响,并且推导出适用于海水电导率测量的回路补偿公式。该模型通过搭建水下磁耦合电导率测量系统进行实验研究,从频率、负载、补偿方式3个角度比较了海水电导率变化对系统的影响及电导率测量效果。实验结果表明,采用磁耦合谐振技术进行海水低电导率测量是可行的。针对实验结果,提出了进一步提高测量的精确度、稳定性的优化方向和系统参数选择原则。

Aiming at the problem of online monitoring of salty tide, the article proposes a seawater conductivity measurement model based on magnetic coupled resonance technology, analyzes the influence of seawater eddy current on the magnetic coupled resonance system from different perspectives, and derives a loop compensation formula applicable to seawater conductivity measurement. The model is studied experimentally by building an underwater magnetically coupled conductivity measurement system and comparing the effect of seawater conductivity change on the system and the conductivity measurement effect from three perspectives of frequency, load and compensation method. The experimental results show that it is feasible to use magnetically coupled resonance technique for low conductivity measurement of seawater. In view of the experimental results, the optimization directions and system parameter selection principles for further improving the accuracy and stability of the measurement are proposed in the paper.