Study on Standardization of Thermography for Separation Detection of Finish Material on External Wall of Building

建筑外墙饰面材料分离度热成像检测标准化研究

• 批准号: 05555158
• 负责人: TANIGAWA Yasuo
• 金额: $ 5.82万
• 依托单位: Nagoya Univ.
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental 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/grant/KAKENHI-PROJECT-05555158/
• 关键词: Thermography; Surface temperature; Transition; Separation detectability; Detectable wavelength band; Minimum detectable thermal difference; Spatial division; Reflex wave

In this study, applicability of thermography for separation detection of finish material, such as tile and mortar, on external wall of building are clarified quantitatively.The results in this fiscal year are summarized as follows :1) Experimental discussion using the real size specimen ; The limitation of this detection method on laboratory level is clarified by using specimens with artificial defects. The parameters in this experiment are as follows : area, depth and thickness of artificial defects ; season, insolation and measuring time ; wind velocity and thermal difference between inner and outer surface of specimen. Especially, in order to improve the reproducibility, this experiment was carried out using thermal control with sol-air temperature, that is added to calculated temperature equal to heat flux by insolation.2) Development of program for data analysis ; Many problems should be resolved in order to apply the program for data analysis to separation detection of finish material on external wall of building. In this fiscal year, a few considerations were programd in the data analysis as follows : geometrical correction ; thermal gradient correction ; stain and wind velocity correction.3) Unsteady heat conduction analysis by FEM ; Being continued from the last fiscal year, unsteady heat conduction analysis on imagined external wall model with various defects was carried out by using three dimensional finite element method. Parameters are area, depth and thickness of defect ; thermal difference between inner and outer surface of wall ; and effect of heating and cooling. The analytical results are compared with experimental results, and the limitation and the best condition for this method under ideal status is clarified.

本研究针对建筑外墙饰面材料（如瓷砖、砂浆）的分离检测，定量地阐明了热像法的适用性，本财年的研究结果总结如下：1）采用真实的尺寸试件进行实验探讨，通过人工缺陷试件阐明了该检测方法在实验室水平上的局限性。试验参数包括：人工缺陷的面积、深度和厚度;季节、日照和测量时间;风速和试件内外表面温差。特别是，为了提高实验的重现性，本实验采用了热控法，即在计算得到的日照热通量的基础上加上太阳-空气温度。2）数据分析程序的开发：将数据分析程序应用于建筑外墙饰面材料的脱落检测，需要解决的问题很多。本年度在数据分析中考虑了几何修正、温度梯度修正、应变和风速修正等因素。3）有限元法的非稳态热传导分析继上年度之后，采用三维有限元法对假想的各种缺陷外墙模型进行了非稳态热传导分析。参数包括缺陷的面积、深度和厚度;墙体内外表面的温差;加热和冷却的影响。将理论分析结果与实验结果进行了比较，明确了该方法的局限性和理想状态下的最佳条件。

项目成果

T.Komiyama, Y.Tanigawa, Y.Nakano and R.Noda: "Study on Limitations of Thermographic Survey Applied to the Detection of Delaminations in External Walls" SPIE Proceedings (U.S.A.). Vol.2473 (in print). (1995)

T.Komiyama、Y.Tanikawa、Y.Nakano 和 R.Noda：“应用热成像测量检测外墙分层的局限性的研究”SPIE 论文集（美国）。

谷川恭雄: "赤外線サーモグラフィー法による外壁仕上げ材のはく離検知の適用限界に関する実験的研究" 日本建築学会東海支部研究報告集. Vol.33. 53-56 (1995)

谷川康雄：《利用红外热成像法进行外墙装饰材料剥离检测适用范围的实验研究》日本建筑学会东海分会研究报告卷 33. 53-56 (1995)

谷川 恭雄: "赤外線サーモグラフィー法による外壁仕上げ材のはく離検知の適用限界に関する実験的研究" 日本建築学会東海支部研究報告集. Vol.33. 53-56 (1995)

谷川康雄：《利用红外热成像法进行外墙装饰材料剥离检测适用范围的实验研究》日本建筑学会东海分会研究报告卷 33. 53-56 (1995)

T.Watanabe, Y.Kurokawa, H.Mori and Y.Tanigawa: "Analytical Study on Estimation of Internal Defect in Concrete Wall by Thermography" Trans.of JCI. Vol.15. 281-288 (1993)

T.Watanabe、Y.Kurokawa、H.Mori 和 Y.Tanikawa：“利用热成像技术估算混凝土墙内部缺陷的分析研究”Trans.of JCI。

T.Komiyama: "Study on limitations of thermographic survey applied to the detection of delaminations in external walls" SPIE Proceedings(U.S.A.). Vol.2473. in print (1995)

T.Komiyama：“应用于外墙分层检测的热成像测量局限性的研究”SPIE 论文集（美国）。