Wave Analysis in Ultrasonic Inspection using Ultrasonic Visualization Method

使用超声波可视化方法进行超声波检测中的波分析

• 批准号: 08455327
• 负责人: MIHARA Tsuyoshi
• 金额: $ 4.86万
• 依托单位: TOHOKU University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455327/
• 关键词: Visualization Method; Ultrasonic Inspection; Wave Analysis; Crack; Ultrasonic Field; Photoelastic Method; Reflection; 可視化法; 波形解析; 超音波探傷; CT試験片; 画像解析; 超音波反射

Ultrasonic wave in materials is affected by microstructures, flaw, grain, inclusions and so on, and the wave form of received wave is changed during propagation. Then, wave form analysis of received echo has been considered as the important procedures for non-destructive materials evaluation. However since conversional wave analysis has used only incident wave and received wave, perfect monitoring of wave form in propagation could not be made and the effect of measurement setup dependence remain unsolved. In this report, photoelastic ultrasonic visualization system is applied to estimate the wave form analysis in the glass model specimen whose acoustic properties is similar to steel structures. This method can estimate the wave form at every ultrasonic propagation state in glass model.Estimated wave form by photoelastic ultrasonic visualization method is compared to the one by conversional method. As the results, wave form could be estimated from photoelastic ultrasonic visualization image at every state in propagation when the amplitude of the flaw echo is weak. However when the amplitude of the flaw echo is high, estimated wave form deformed because of the narrow dynamic range of the image processing system used.

超声波在材料中受微观结构、缺陷、晶粒、夹杂物等影响，接收波在传播过程中波形发生变化。因此，接收回波的波形分析已被认为是无损材料评估的重要程序。然而，由于转换波分析仅使用入射波和接收波，因此无法对传播中的波形进行完美的监测，并且测量设置依赖性的影响仍未解决。在本报告中，应用光弹超声可视化系统来估计声学特性与钢结构相似的玻璃模型样本的波形分析。该方法可以估计玻璃模型中每种超声传播状态下的波形。将光弹性超声可视化方法估计的波形与换算法估计的波形进行了比较。结果表明，当缺陷回波振幅较弱时，可以根据光弹超声可视化图像估计传播各状态下的波形。然而，当缺陷回波的幅度较高时，由于所使用的图像处理系统的动态范围较窄，估计的波形会变形。

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