DEVELOPMENT OF FLAW DETECTING SYSTEM BY INFRARED THERMOGRAPHY

红外热像探伤系统的研制

• 批准号: 05452124
• 负责人: SHIRATORI Masaki
• 金额: $ 3.97万
• 依托单位: YOKOHAMA NATIONAL UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452124/
• 关键词: Infrared Thermography; Nondestructive Inspection; Detection of flaws; Image Processing; Fatigue Crack; Honeycomb Sandwich

In this research project, the following results have been gotten :(1) Due to a detection of cracks embedded in the structural members, various methods for heating or cooling the specimen have been examined. Heating by high-frequency eddy current is the best suited method.(2) More than 2.0mm fatigue cracks can be detected by an infrared thermography with a magnifying glass.(3) An image-processing expert system has been developed to obtain definite images of the cracks.(4) Due to a detection of flaws in honeycomb sandwich constructions, various methods for heating or cooling the specimen have been examined. Heating by a silicone rubber heater with a heat accumulator is the best suited method.(5) It has been confirmed that this method is useful to detect of various flaws in honeycomb sandwich constructions which can be caused in the respective manufacturing process.(6) Flaws of which sizes are larger than the honeycomb core size can be detected.(7) The developed image-processing method reveals the honeycomb structure and unclear flaws.(8) A three-dimensional finite element method program has been developed to carry out the heat conduction for the detection of flaws in a structural wall.

在本研究项目中，取得了以下成果：(1)由于检测到结构构件中存在裂纹，对各种加热或冷却试件的方法进行了研究。高频涡流加热是最适合的方法。(2)用放大镜红外热像仪可以检测到2.0 mm以上的疲劳裂纹。(3)开发了一个图像处理专家系统，以获得明确的裂纹图像。(4)由于检测到蜂窝夹层结构的缺陷，研究了各种加热或冷却试件的方法。用带有蓄热器的硅橡胶加热器加热是最合适的方法。(5)已经证实，该方法适用于检测蜂窝夹层结构在各自的制造过程中可能产生的各种缺陷。(6)可以检测出尺寸大于蜂窝芯尺寸的缺陷。(7)所开发的图像处理方法揭示了蜂窝结构和不清楚的缺陷。(8)开发了三维有限元程序，用于检测结构墙中的缺陷。

项目成果

Masaki Shiratori: "Application of Infrared Thermography to Detection of Cracks" JSME International Journal-Series A. Vol.37. 296-302 (1994)

Masaki Shiratori：“红外热成像在裂纹检测中的应用”JSME 国际期刊 A 系列第 37 卷。

白鳥 正樹: "赤外線映像と画像処理を用いた欠陥探知システム" 構造工学における数値解析法シンポジウム論文集. 18巻. (1993)

Masaki Shiratori：“使用红外成像和图像处理的缺陷检测系统”结构工程数值分析方法研讨会论文集第 18 卷（1993 年）。

M.Shiratori, Q.Yu, Y.Takahashi and N.Ogasawara: "Application of Infrared Thermography to Detection of Flaws in Honeycomb Sandwich Constructions" JSME International Journal. Ser.A Vol.37 No.4. 396-402 (1994)

M.Shiratori、Q.Yu、Y.Takahashi 和 N.Ogasawara：“红外热成像技术在蜂窝夹层结构缺陷检测中的应用”JSME 国际期刊。

白鳥 正樹: "赤外線映像装置によるき裂の検知と画像処理" 日本機会学会論文集. 58-556. 42-47 (1992)

Masaki Shiratori：“使用红外成像设备进行裂纹检测和图像处理”，日本机械工程师学会会刊 58-556 (1992)。

M.Shiratori: "Application of Thermography to Detection of Flaws in Honeycomb Sandwich Constructions" JSME International Journal. A-37-4. 396-402 (1994)

M.Shiratori：“热成像技术在蜂窝夹层结构缺陷检测中的应用”JSME 国际期刊。