基于磁场耦合的非接触式金属温度测量系统  

A non-contact metal temperature measurementsystem based on magnetic field coupling

作　　者：杨鸿滟 翁婉莹 王云峰 吴建德[1] 何湘宁[1] Yang Hongyan;Weng Wanying;Wang Yunfeng;Wu Jiande;He Xiangning(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;Foshan Shunde Midea Electric Heating Appliances Manufacturing Co.,Ltd,Foshan 528311,China)

机构地区：[1]浙江大学电气工程学院,杭州310027 [2]佛山市顺德区美的电热电器制造有限公司,佛山528311

出　　处：《仪器仪表学报》2025年第1期193-202,共10页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金项目(52350003);佛山市顺德区科技创新项目(2230218004234)资助。

摘　　要：随着现代科学与工程技术的不断进步,金属温度测量在保证产品质量、优化生产过程和确保安全等方面的重要性日益突出。传统的金属温度测量方法在实际应用中常面临难以在线测量及测量精度较低的问题。基于此,提出了一种基于磁场耦合的非接触式金属温度测量传感系统设计方法。首先,分析了系统等效阻抗实部与金属温度之间的近似线性关系,进而将无法直接测量的温度变化量转化为可测量的系统阻抗值,为基于磁场耦合的非接触式金属温度测量提供了理论依据。其次,构建了非接触式金属温度测量系统的等效模型,并使用Ansys Maxwell软件进行三维有限元仿真验证,验证了系统模型的可行性。进一步,提出并比较了两种不同类型的电涡流传感器用于温度测量。其中,多线圈耦合的电涡流传感器具有较小的体积、更高的测量精度和较强的稳定性。基于上述理论分析和仿真验证,提出了基于多线圈耦合的非接触式金属温度测量系统设计方法,并进行了系统建模分析和实物测试。实验结果显示,该系统的绝对温度偏差<2℃,验证了系统的可靠性和稳定性。该系统能够在没有直接可视路径的情况下稳定工作,克服了对可视路径的依赖,提升了非接触式金属温度测量系统的适用性,能够在复杂环境下实现金属温度的实时精确测量。With the continuous advancement of modern science and engineering technology,the importance of metal temperature measurement has become increasingly prominent for ensuring product quality,optimizing production processes,and ensuring safety.However,traditional metal temperature measurement methods often face challenges such as difficulty in online measurement and low measurement accuracy.To address these issues,this study proposes a non-contact metal temperature measurement method based on magnetic field coupling.First,the study analyzes an approximate linear relationship between the real part of the system′s equivalent impedance and temperature,thereby transforming the unmeasurable temperature changes into measurable system impedance.It provides a theoretical foundation for non-contact metal temperature measurement based on magnetic field coupling.Next,an equivalent model of the non-contact metal temperature measurement system is formulated.Its feasibility is evaluated through a three-dimensional finite element simulation using Ansys Maxwell software.Furthermore,the study proposes and compares two different types of eddy current sensors for temperature measurement,highlighting the multi-coil coupled structure for its compact size,high accuracy,and great stability.Based on this,a non-contact metal temperature measurement system using multi-coil coupling is proposed.The system modeling analysis and physical testing are conducted.The experimental results show that the absolute temperature deviation of the non-contact metal temperature measurement system based on the multi-coil coupling model is less than 2℃,confirming the reliability and stability of the system.The system can operate stably without a direct visual path,overcoming the reliance on line-of-sight in traditional non-contact temperature measurement techniques.This advancement significantly improves the system′s performance and applicability,enabling precise,real-time measurement of metal temperature even in complex and obstructed environments.With t

关 键 词：磁场耦合 非接触式温度测量 电涡流 系统建模 

分 类 号：TH811[机械工程—仪器科学与技术] TM93[机械工程—精密仪器及机械]