双层导电涂层厚度的涡流无损检测方法研究

发布时间：2018-10-22 10:16

【摘要】：多涂层结构可显著提高基体材料的耐热性、耐磨性、耐腐蚀性等性能,因此在航空航天、船舶制造等行业得到广泛应用。在工程应用中,涂层厚度是否均匀对基体材料的物理性能产生重要影响。针对近几年出现的多层导电涂层材料,提出一种双层导电涂层厚度的电磁无损检测新方法。采用数值仿真和试验相结合的方法深入研究了多层导电涂层厚度检测中多层材料在厚度检测中的耦合问题及每层厚度与电导率对检测信号的影响问题。最后根据研究结论提出解耦算法反演各涂层厚度,并进行了试验验证。结果表明:文中提出的基于解耦算法的双涂层厚度检测方法对多导电涂层厚度的检测误差均低于10%。该方法也可进一步扩展到三涂层结构甚至四涂层结构的涂层厚度检测中。
[Abstract]:Multi-coating structure can significantly improve the heat resistance, wear resistance and corrosion resistance of the substrate, so it has been widely used in aerospace, shipbuilding and other industries. In engineering application, whether the coating thickness is uniform or not has an important effect on the physical properties of the substrate. A new method of electromagnetic nondestructive testing for the thickness of double layer conductive coatings is proposed for the multilayer conductive coating materials in recent years. The coupling problem of multilayer material in thickness measurement of multilayer conductive coating and the influence of thickness of each layer and conductivity on the detection signal were studied by means of numerical simulation and experiment. Finally, a decoupling algorithm is proposed to retrieve the thickness of each coating, which is verified by experiments. The results show that the detection error of the double coating thickness detection method based on decoupling algorithm is lower than that of 1010 coating thickness. The method can also be extended to the measurement of coating thickness of three-coating structure and even four-coating structure.
【作者单位】：电子科技大学机械电子工程学院;西安交通大学机械工程学院;
【基金】：国家自然科学基金重大仪器专项资助项目(61527803)
【分类号】：TB306

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