Frequency Scanning System by Multi-frequency Excitation Spectrogram Method

多频激励谱图法频率扫描系统

• 批准号: 13555118
• 负责人: ENOKIZONO Masato
• 金额: $ 8万
• 依托单位: Oita University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555118/
• 关键词: Multi-frequency excitation; Spectrogram; Nondestructive testing; Electromagnetic evaluation; Fatigue estimation; Defect detection; 多重周波励磁; 非破壊試験; 電磁気探傷; 疲労探査; 欠陥探査; 亀裂探査; ECT; 非破壊探査; 磁気工学

One purpose of this project is to present new neural network model used for eddy current multi-frequency system simulation and flaws identification. In this project a Multi-Frequency Excitation and Spectrogram Eddy Current System (MFES) and an inverse neural model were used to detect and identify natural flaws in steam generator tubes. It is shown that the applied dynamic neural model of the ECT sensor offers very high speed of operation and guarantees reliability of the recognition results.Next, we present chaotic behavior of the Barkhausen noise generated in magnetic fields. This noise is generated by the magnetization jumps caused by abrupt depinning of magnetic domains. We have studied the application of the noise to nondestructive testing techniques. The results showed that the Barkhausen noise could be continuously generated in a rotational magnetic field and it was within the bounds of possibility that the signal had information referent to detects or flows in measuring materials. We investigated to make the existence of Chaos in the Barkhausen noise clear from the reconstructed attractor by Embedding.Then we developed the portable apparatus for this system.

本课题的目的之一是提出一种新的用于涡流多频系统仿真和缺陷识别的神经网络模型。在本项目中，采用多频激励和频谱涡流系统(MFES)和逆神经模型来检测和识别蒸汽发生器管中的天然缺陷。结果表明，该传感器的动态神经模型具有很高的运算速度和识别结果的可靠性。其次，研究了磁场中巴克豪森噪声的混沌行为。该噪声是由磁畴的突然去钉扎引起的磁化跳跃产生的。我们研究了噪声在无损检测技术中的应用。结果表明，巴克豪森噪声可以在旋转磁场中连续产生，该信号具有与测量材料中的检测或流动有关的信息的可能性在范围内。我们通过嵌入的方法从重构的吸引子中澄清巴克豪森噪声中混沌的存在。然后，我们研制了用于该系统的便携式仪器。

项目成果

M.Oka, M.Enokizono: "Eddy Current Testing Using Rotational Magnetic Flux Type Probe for SG Tubes"Electromagnetic Nondestructive Evaluation. 5. 234-241 (2001)

M.Oka、M.Enokizono：“使用旋转磁通型探头对 SG 管进行涡流检测”电磁无损评估。

T.Todaka, M.Oka, M.Enokizono, R.Sikora, M.Komorowski, S.Gratkowski: "Finite Element Analysis of Support Problems in Non-Destructive Evaluation"JSAEM Studies in Applied Electromagnetics and Mechanics. Vol.12. 92-95 (2002)

T.Todaka、M.Oka、M.Enokizono、R.Sikora、M.Komorowski、S.Gratkowski：“无损评估中支撑问题的有限元分析”应用电磁学和力学中的 JSAEM 研究。

R.Sikora, M.Komorowski, S.Gratkowski, M.Enokizono, T.Chady: "Mathematical Model of a Magnetoresistive Transducer for Eddy Current Nondestructive Testing of Materials"International Journal of Applied Electromagnetics and Mechanics, IOS Press, Part III. Vol

R.Sikora、M.Komorowski、S.Gratkowski、M.Enokizono、T.Chady：“用于材料涡流无损检测的磁阻传感器的数学模型”国际应用电磁学和力学杂志，IOS Press，第三​​部分。

M.Oka, T.Yakushiji, Y.Tsuchida, M.Enokizono: "Evaluation of the Bending Fatigue of Stainless Steel Using the Residual Magnetization Method"Journal of The Magnetics Society of Japan. 25,4-2. 1075-1078 (2001)

M.Oka、T.Yakushiji、Y.Tsuchida、M.Enokizono：“使用残余磁化法评估不锈钢的弯曲疲劳”日本磁学学会杂志。

Y.Tsuchida, Y.Yoshitomi, M.Enokizono: "Chaotic Behavior of Rotational Barkhausen Noise"Journal of The Magnetics Society of Japan. 25,4-2. 1099-1102 (2001)

Y.Tsuchida、Y.Yoshitomi、M.Enokizono：“旋转巴克豪森噪声的混沌行为”日本磁学学会杂志。