目的 研究铝箔不同的密封情况对电磁加热过程中铝箔表面温度分布的影响，建立非接触式密封性检测方法的理论依据。方法 首先创建感应加热理论的有限元数学模型，计算感应电流产生的焦耳热量，以此为内部热源求解温度场。然后通过有限单元法创建6种不同密封情况的铝箔封口稳态热传导模型，对不同铝箔密封情况在恒定温度条件下进行温度分布的三维分析求解，并采用Ansys软件模拟分析加热温度场下铝箔密封的传热特性。结果 得到了各种密封情况对应的温度场图像及温度曲线，其中铝箔密封完好的热图像呈高温闭合且均匀的环状区域，在其温度曲线中，温度集中分布在70~80 ℃，并具有对称性特点，且有2个高温峰值；另外5种为不成环或成环不均的热图像，表明铝箔密封失败。结论 通过研究热温度场分布特性可以判断铝箔封口密封程度，能够为进一步优化非接触式密封性检测的自动化程度提供理论支持。

The work aims to study the influence of different sealing conditions of aluminum foil on the surface temperature distribution of aluminum foil during electromagnetic heating, and establish the theoretical basis of non-contact sealing detection. Firstly, a finite element mathematical model of the induction heating theory was created to calculate the Joule heat generated by the induced current to solve the temperature field for the internal heat source. Then, steady-state heat conduction model of aluminum foil seals with six different sealing ways was created by the finite element method. The three-dimensional analysis of the temperature distribution of different aluminum foil seals at constant temperatures was carried out. Simulation and analysis of heat transfer characteristics of aluminum foil seals in heating temperature field were conducted with Ansys software. The temperature field image and temperature curve corresponding to various sealing conditions were obtained. The temperature field image sealed by aluminum foil was a closed and uniform annular region with high temperature; in its temperature curve, the temperature was concentrated at 70~80 °C and featured by symmetry, and there are 2 high temperature peaks. The other 5 were unlooped or uneven thermal images, indicating that the aluminum foil sealing failed. According to the distribution characteristics of the thermal temperature field, the sealability of the aluminum foil seal can be evaluated, and it can provide theoretical support for further optimizing the automation degree of the non-contact sealing detection.