Development of a Global NDT Technique by Infrared Thermography for Strategic Maintenance System of Aging Structures.

开发用于老化结构战略维护系统的红外热成像全球无损检测技术。

• 批准号: 15360055
• 负责人: SAKAGAMI Takahide
• 金额: $ 9.73万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15360055/
• 关键词: Quantitative NDT; Infrared Thermography; Active Heating; Self Reference Lock-in Method; Crack; Delamination; Concrete Structure; Steel Structure; 非破壊評価; ロックイン計測; 経年構造物; 鉄鋼構造物; コンクリート構造物; 維持・保全

In recent years aging and deterioration of infra-structures before their design life has become a serious problem. The importance of appropriate maintenance for aging structures is emphasized. Introduction of a new condition based maintenance system based on the evaluation of fitness for service is required, since the conventional time-based maintenance system has a lot of problems in efficiency, cost, saveenergy, etc. The present project developed a new nondestructive testing (NDT) technique based on the infrared thermographic temperature measurement for structural integrity assessment of aging infra-structures. Global diagnosis system was constructed based on infrared thermography, active heating equipment and processing system of sequential infrared data. For concrete structures, thermographic NDT techniques based on the Fourier analyses and the lock-in analyses of the transient temperature distribution under step heating were developed for the identification of delamination defects … More . Experimental investigations were made on the resolution and the applicability in the identification of defects in concrete samples. It was found that defect parameters were quantitatively determined from Fourier coefficients or phase values. For steel structures, a new NDT technique was developed for detecting and sizing of fatigue cracks. A self-reference lock-in infrared thermography was developed, in which a reference signal was constructed by using the same sequential data on thermoelastic temperature change. Temperature change in a region of interest was correlated with that in a remote area for reference signal construction. The lock-in algorithm based on the least squares method was employed for random loading. Proposed technique was applied for fatigue crack identification based on the detection of significant thermoelastic temperature change due to the singular stress field in the vicinity of crack tips. It was found that significant contrast change was observed at the crack tip in the self-reference lock-in thermal image, demonstrating the feasibility of the proposed technique. Less

近年来，基础设施在设计寿命之前的老化和定义已成为一个严重的问题。强调了适当维护对衰老结构的重要性。需要基于对服务的适应性评估的新基于条件的维护系统的引入，因为基于时间基于时间的维护系统在效率，成本，Saveenergy等方面存在许多问题。本项目开发了基于感染温度的热量表测量值的新的非破坏性测试（NDT）技术，以评估AGING AGING AGINTIRACTY WEMTICENTIONS。全球诊断系统是基于基础架构，主动加热设备和顺序红外数据的处理系统构建的。对于混凝土结构，开发了基于傅立叶分析的热量表NDT技术，以及在步骤加热下的瞬态温度分布的锁定分析，以识别分层缺陷……更多。对分辨率和在鉴定混凝土样品中缺陷的适用性进行了实验研究。发现缺陷参数是根据傅立叶系数或相值定量确定的。对于钢结构，开发了一种新的NDT技术，用于检测和大小疲劳裂纹。开发了自我参考锁定红外热摄影，其中通过使用有关热弹性温度变化的相同顺序数据来构建参考信号。感兴趣区域中的温度变化与偏远区域中的温度变化有关，以进行参考信号构造。基于最小二乘方法的锁定算法用于随机加载。根据裂纹尖端附近的奇异应力场引起的明显热弹性温度变化，将提出的技术用于疲劳裂纹识别。发现在自我参考锁定热图像中的裂纹尖端上观察到显着的对比度变化，证明了提出的技术的可行性。较少的

项目成果

ロックイン赤外線サーモグラフィによるコンクリート構造物の非破壊検査

使用锁定红外热成像技术对混凝土结构进行无损检测

• 发表时间: 2004
• 期刊: セメント・コンクリート論文集 No.57
• 作者: Takahide Sakagami;Takashi Nishimura;Shiro Kubo;田村栄一;中村士郎
• 通讯作者: 中村士郎

Nondestructive Testing for Concrete Structure Using Lock-in Thermography

使用锁定热成像技术对混凝土结构进行无损检测

• 发表时间: 2004
• 期刊: Cement Science and Concrete Technology No.57
• 作者: NAKAMURA;Shiro
• 通讯作者: Shiro

Development of a Pulse Thermography Nondestructive Testing Technique Using Wavelet Transform

利用小波变换的脉冲热成像无损检测技术的开发

• 发表时间: 2005
• 期刊: Japan Soc.Mech.Engrs. No.054-1(Preprint)
• 作者: ENDO;Takeshi
• 通讯作者: Takeshi

赤外線サーモグラフィ法における検査環境の評価方法に関する検討

红外热成像检测环境评价方法研究

• 发表时间: 2003
• 期刊: 日本材料学会 第3回コンクリート構造物の補修、補強、アップグレードシンポジウム論文集 第3巻
• 作者: 坂上隆英;西村 隆;久保司郎;阪上隆英;中村士郎;中村士郎;阪上隆英;遠藤 健;原 文人;中村士郎;阪上隆英;中村士郎
• 通讯作者: 中村士郎

改良ロックイン赤外線サーモグラフィ法によるコンクリート構造物の非破壊検査

使用改进的锁定红外热成像方法对混凝土结构进行无损检测

• 发表时间: 2004
• 期刊: 日本機械学会第3回評価・診断に関するシンポジウム講演論文集 No.04-47
• 作者: Takahide Sakagami;Takashi Nishimura;Shiro Kubo;田村栄一;中村士郎;小島陽介;Takahide Sakagami;中村士郎;Takahide Sakagami;阪上隆英;鳥取誠一;阪上隆英;阪上隆英;中村士郎
• 通讯作者: 中村士郎