多层异质薄膜隐身涂层结构完整性检测方法研究

Aircraft stealth coating is a kind of multilayer different material membrane structure. The structural integrity especially thickness of coating has significant effects on stealth performance. The existing detection methods of thickness detection, just like the ultrasonic method and single frequency eddy current method et al., can not accurately measure the stealth coating thickness of each layer. .This project based on the pulsed eddy current testing technology has formed the following results. 1)Through the study of eddy current response characteristics, the method of detecting the thickness of the single layer thickness of synchronous detection is expanded for multilayer different material. 2)Eddy current field distribution model of multi-layer different material membrane is established, through the analysis of the distribution of eddy current field in each layer of material and the mechanism. 3)Multidimensional response information in pulsed eddy current signals is extracted. A multilayer different material structure detection method is proposed, using of data fusion method and separation technology..The setup of this detection theory can not only advance the development of the multilayer structure detection in NDT, but also provide security for the research and development, production and maintenance of stealth aircraft and stealth ship. The development of this technique have the important significance in theory and application.

战机隐身涂层是一种多层异质薄膜结构，其结构完整性尤其是厚度对隐身性能具有重大影响。现有检测方法，如超声波法和传统单频电磁涡流方法，均难以准确测量隐身涂层每一层的厚度。.本项目基于脉冲涡流检测技术：1）通过研究每层材料的涡流响应特性，将单层厚度检测扩展为多层异质材料厚度同步检测；2）通过分析每层材料中涡流场的分布和作用机制，建立精准的多层异质薄膜涡流场分布模型；3）提取脉冲涡流信号中多维度响应信息，综合运用数据融合与分离技术，提出一种多层异质结构完整性的检测方法。.该项目的成功实施，可以促进多层结构无损检测技术的发展，为我国的隐身飞机研发、生产和维护提供保障，具有重大的理论和应用价值。

战机隐身涂层是一种多层异质薄膜结构，其结构完整性尤其是厚度对隐身性能具有重大影响。现有检测方法，如超声波法和传统单频电磁涡流方法，均难以准确测量隐身涂层每一层的厚度。本项目基于脉冲涡流检测技术：1）通过研究每层材料的涡流响应特性，将单层厚度检测扩展为多层异质材料厚度同步检测；2）通过分析每层材料中涡流场的分布和作用机制，建立精准的多层异质薄膜涡流场分布模型；3）提取脉冲涡流信号中多维度响应信息，综合运用数据融合与分离技术，提出一种多层异质结构完整性的检测方法。通过实验验证，本项目提出的方法可以实现对多层涂层厚度进行高精度检测，达到了预期目标。该项目的成功实施，可以促进多层结构无损检测技术的发展，为我国的隐身飞机研发、生产和维护提供保障，具有重大的理论和应用价值。