Material Aging Diagnosis System using Magnetic sensing and Simulation

使用磁传感和模拟的材料老化诊断系统

• 批准号: 21560448
• 负责人: KOJIMA Fumio
• 金额: $ 3万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21560448/
• 关键词: 計測工学; 信号解析; 非破壊検査; 磁性; システム工学; 状態監視; 格子欠陥; 長寿命化

It is well known that the magnetism of strong magnetic materials is extremely sensitive with respect to the change of microstructure and to the residual-stress variation. In this study, a non-destructiveness evaluation system for aging properties was developed based on magnetic measurements of the ferromagnetic materials. The coercive force and Barkhausen noise(BHN) were evaluated using carbon steel sample specimens of stress loading. The characteristic curves were then derived by the measured magnetic properties. A fuzzy expert system related to magnetic properties was consequently developed with the decision rules of material aging process. The efficacy and validity of the proposed system were shown in the experimental works

众所周知，强磁材料的磁性对微观结构的变化和残余应力的变化极为敏感。本研究基于铁磁材料的磁性测量，开发了一套老化性能的无损评价系统。用应力加载的碳钢试件测量了样品的矫顽力和巴克豪森噪声。然后根据测量的磁特性绘制了特性曲线。在此基础上，利用材料老化过程的决策规则，开发了与磁性有关的模糊专家系统。实验结果表明了该系统的有效性和有效性。

项目成果

Three Dimensional Shape Recovery of Fatigue Crack using Eddy Current Testing Signals

使用涡流检测信号进行疲劳裂纹的三维形状恢复

• 发表时间: 2009
• 期刊: Studies in Applied Electromagnetics and Mechanics 30(印刷中)
• 作者: Kcnichi OSHIMA;Fumio KOJIMA
• 通讯作者: Fumio KOJIMA

Sizing methodologies of pipe wall thinning and visualization of wave propagation by EMAT simulator in nuclear plant

核电站中管壁减薄的尺寸确定方法和 EMAT 模拟器波传播的可视化

• 发表时间: 2010
• 期刊: Studies in Applied Electromagnetics and Mechanics
• 作者: D.Kosaka;F.Kojima;H.Yamaguchi
• 通讯作者: H.Yamaguchi

Quantitative evaluation of wall thinning in pipe wall using electromagnetic acoustic transducer

• DOI: 10.3233/jae-2010-1238
• 发表时间: 2010-01-01
• 期刊: INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS
• 影响因子: 0.6
• 作者: Kosaka, Daigo;Kojima, Fumio;Yamaguchi, Hiroshi
• 通讯作者: Yamaguchi, Hiroshi

Evaluation of subsurface shape of fatigue crack with eddy current signals

用涡流信号评估疲劳裂纹的亚表面形状

• 发表时间: 2011
• 作者: Yuusaku Yamaguchi;Ken' ichi Fujimoto and Tetsuya Yoshinaga;濱口智則・寺戸敏彦;小島史男;Tetsuya Yoshinaga;Kenichi Ohshima and Fumio Kojima
• 通讯作者: Kenichi Ohshima and Fumio Kojima

Pipe wall thickness measurements on flow accelerated corrosion by electro-magnetic acoustic transducer

利用电磁声换能器测量流动加速腐蚀的管壁厚度

• 发表时间: 2011
• 作者: D.Kosaka;F.Kojima;K.Umetani
• 通讯作者: K.Umetani