A study on improvement of ultrasonic inspection.

超声检测改进的研究

• 批准号: 06555132
• 负责人: MIKI Chitoshi
• 金额: $ 5.89万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06555132/
• 关键词: ultrasonic inspection; ultrasonic wave; numerical analysis; deconvolution; time-vesolution; aperture synthesis system; 超音波探傷検査; ディコンボリューション処理; 最大エントロピー法; 時間分解能; 可視化; 超音波伝播挙動; 信号処理; 画像化処理; 端部エコー; 欠陥先端; 溶接欠陥; 疲労き裂

In order to improve ultrasonic inspection, in this study many aspects of this field were studied and many important results were obtained. Firstly, the important topics of application of ultra sonic inspection for civil engineering field were researche. Some problems, which must be solved to improve the ultrasonic inspection, were clarified. In second section, FEM analysis were carried out to know the moving path of ultrasonic wave and the best location of probe. In third section, the way to analyze the data of ultrasoic inspection were studied. To improve the time-resolution of ultrasonic inspection, numerical deconvolution analysis, maximum entropy method were studied. This methods could prevent noise effect and have high time-resolution. In addition, aperture synthesis system were studied and by using this system high time-resolution were obtained. Furthermore, to characterize the flaws of steel members, the application of the imaging method of ultrasonic tomography was studied.In fourth section, as a example of application of ultrasonic inspection for actual problems, the application for interface cracks was studied. Finally, in last section, problems in the application of ultrasonic inspection for actual steel bridges, especially automatic ultrasonic inspection, were reviewed.

为了改进超声检测技术，本研究对该领域的许多方面进行了研究，并取得了许多重要的成果。首先，对超声检测在土木工程领域应用的重要课题进行了研究。阐明了提高超声检测水平必须解决的几个问题。第二部分进行了有限元分析，确定了超声波的运动路径和探头的最佳位置。第三部分对超声检测数据的分析方法进行了研究。为了提高超声检测的时间分辨率，研究了数值反褶积分析和最大熵方法。该方法可以有效地防止噪声影响，具有较高的时间分辨率。此外，还研究了孔径合成系统，并利用该系统获得了高时间分辨率。此外，为了对钢构件的缺陷进行表征，研究了超声层析成像方法的应用。第四部分以超声波检测在实际问题中的应用为例，研究了超声波检测在界面裂纹中的应用。最后，在最后一节对超声检测在实际钢桥特别是自动超声检测应用中存在的问题进行了综述。

项目成果

奥山裕一・三木干寿: "ディコンボリューション処理による超音波探傷試験の時間分解能向上の試み" 土木学会論文集. No556/I-38. 77-83 (1997)

Yuichi Okuyama 和 Koji Miki：“尝试通过反卷积处理提高超声波探伤测试的时间分辨率”，日本土木工程师学会汇刊 No556/I-38 (1997)。

奥山,裕一: "ディコンボリューション処理による超音波探傷試験の時間分解能向上の試み" 土木学会論文集. No.556/I-38. 77-83 (1997)

Okuyama, Yuichi：“尝试通过反卷积处理提高超声波探伤测试的时间分辨率”，日本土木工程师学会汇刊第 556/I-38 号（1997 年）。

三木干寿: "鋼橋における非破壊検査-特に瓦動超音波探傷システムの適用についてのレビュー-" 東京工業大学土木工学科研究報告. No.53. 147-168 (1996)

Kenji Miki：《钢桥梁的无损检测——特别是瓦运动超声波探伤系统的应用综述——》东京工业大学土木工程系研究报告第53. 147-168号（1996）。

舘石和雄: "回転探触子を用いた開口合成システムによる超音波探傷の分解能向上の試み" 土木学会論文集. 507/I-30. 121-128 (1995)

Kazuo Tateishi：“尝试使用旋转探头的孔径合成系统来提高超声波探伤的分辨率”，日本土木工程师学会汇刊 507/I-30 (1995)。

Kazuo Tateishi, Chitoshi MIKI: "Current Topics on Ultrasonic Tehniques for Civil Engineering" Technical Report of Dept.of Civil Engineering of Tokyo Institute of Technology. No.51. 43-77 (1995)

Kazuo Tateishi、Chitoshi MIKI：《土木工程超声技术的当前主题》东京工业大学土木工程系技术报告。