基于温度和发射率场的涂层损伤检测方法

Coating damage detection method based on temperature and emissivity field

在现代化国防和航空航天领域,目标表面涂覆具有热防护、电磁屏蔽、降低红外辐射等性能的材料,可有效保护目标,但其处于目标的表面,长期受到周围环境影响,易出现气泡、划痕、脱落等不同类型的损伤,造成涂层性能大幅度降低,无法有效保护目标。因此,需要定期对目标涂层进行检测和维护。通过研究涂层损伤与温度和发射率之间的关系,结合热辐射定律、比色测温技术、发射率测量方法,搭建一套红外热像仪的检测装置,提出一种基于涂层温度和发射率场的涂层损伤检测方法。将研制的检测装置应用于以铝为基底的氧化铝涂层,通过分析氧化铝的温度和发射率准确识别涂层内部和外部损伤,验证了基于温度和发射率场的涂层损伤检测方法的理论模型,以及检测装置的可行性与适用性。

In the field of modern defense and aerospace,the target surface is coated with materials with thermal protection,electromagnetic shielding,infrared radiation reduction and other properties,which can effectively protect the target.However,it is on the surface of the target,which is affected by the surrounding environment for a long time,and is prone to bubbles,scratches,shedding and other types of damage,resulting in a significant reduction in coating performance,unable to effectively protect the target.Therefore,the target coating needs to be inspected and maintained on a regular basis.By studying the relationship between coating damage and temperature and emissivity,combining the law of thermal radiation,colorimetric temperature measurement technology,and emissivity measurement method,a set of thermal imaging camera detection device is built,and a coating damage detection method based on coating temperature and emissivity field is proposed.The developed detection device is applied to the alumina coating based on aluminum,and the internal and external damage of the coating is accurately recognize by analyzing temperature and emissivity of alumina,and the theoretical model of the coating damage detection method based on temperature and emissivity field is verified,as well as the feasibility and applicability of the detection device.