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各种结构材料(钢铁、非金属、玻璃纤维增强塑料、陶瓷等)在制造过程或使用过程中,因疲劳、蠕变、化学作用、紫外线照射等因素,会在内部产生缺陷,使材料的力学性能受极大影响。为鉴别材料内部是否有缺陷存在,超声波探伤是常用的非破坏性检查法,但此法用于检查玻璃纤维增强塑料等复合材料时,由于超声波衰减严重,频率选择相当困难,因此不太适用。本专利利用材料本身的热传导作用进行非破坏性探伤(见图
A variety of structural materials (steel, non-metallic, glass fiber reinforced plastics, ceramics, etc.) in the manufacturing process or use, due to fatigue, creep, chemical reaction, UV radiation and other factors, will produce defects internally, Performance is greatly affected. To identify the existence of defects within the material, ultrasonic testing is commonly used non-destructive inspection method, but this method is used to check the composite materials such as glass fiber reinforced plastic, due to severe ultrasonic attenuation, frequency selection is quite difficult, so not suitable. This patent uses the heat conduction of the material itself for non-destructive flaw detection (see figure)