Study on development of the remote electromagnetic wave testing system by micro antenna

微型天线远程电磁波测试系统的研制研究

• 批准号: 11355006
• 负责人: SHOJI Tetsuo
• 金额: $ 18.93万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11355006/
• 关键词: Nondestructive inspection; Magneto-Optical Inspection; Electromagnetic; Antenna; Surface Crack; 遠隔探傷

We have developed a novel non-contact electromagnetic NDI system that after applying an alternating current to specimen detected indirectly the changes in the magnetic field generated by the changes in the induced signal flow around a crack with micro antenna (dipole antenna, loop antenna). We have obtained the following knowledge as a result of carrying out a series of measurement in order to obtain the indicator of establishing various parameters to improve the detection sensitivity in the method that the induction wire induces high frequency current was attached to an inspection object and then micro antenna scanned around there.1. To generate the constant existing wave depends on the frequency, the induction wire applied a current and the length of specimen, the frequency reduces this influence exists.2. In this research it is possible to detect the defect with a depth of 1 mm in the case of rift-off 10 mm and it is promising as a remote inspection method.3. We can raise the detect … More ion sensitivity about 30 % as compared with the time of research start by the combination of the length of 15 mm and diameter of 0.26 mm as a result of examination the optimization of micro dipole antenna length and a diameter.4. We can raise the detection sensitivity about 2.3 times as compared with the time of research start as a result of examination the loop diameter of a micro loop antenna.5. It is related with a fatigue crack with a depth of 5.5 mm, the detection sensitivity of a micro loop antenna is about 2.6 times as high as a micro dipole antenna. It is based on the above result ; an antenna sensor combined with an induced wire was developed.6. It is possible to detect the fatigue crack made into the ferromagnetic material and the paramagnetic material by the sensor combined an induced wire.7. Although the signal by developed one apparatus sensor showed the asymmetrical distribution to the symmetrical crack, it is thought that a symmetrical signal distribution is obtained by arranging two for an induced line to an antenna, as a result of carrying out the plane detection of the crack circumference for fatigue crack form measurement.8. A novel non-contact NDI technique that detection of a crack is possible without concerned with the quality of the material was developed. Less

我们开发了一种新型的非接触式电磁无损检测系统，该系统在对试件施加交流电后，通过微天线(偶极天线、环形天线)间接检测裂纹周围感应信号的变化所产生的磁场变化。通过一系列的测量，获得了在检测对象上附加感应导线感应高频电流，然后扫描周围微天线的方法，以获得建立各种参数以提高检测灵敏度的指标。产生恒定存在的波形依赖于频率、感应导线施加电流和试件的长度，频率减小这一影响存在。在本研究中，在裂开10 mm的情况下，可以检测到深度为1 mm的缺陷，作为一种远程检测方法是很有前途的。我们可以提高检测…与研究时间相比，离子灵敏度提高了约30%，通过结合长度为15 mm和直径为0.26 mm的研究，对微偶极子天线的长度和直径进行了优化。通过对微环天线环径的检测，使检测灵敏度比研究开始时提高了2.3倍左右。它与5.5 mm深的疲劳裂纹有关，微环天线的探测灵敏度约为微偶极子天线的2.6倍。在此基础上，研制了一种与感应线相结合的天线传感器。通过组合感应线的传感器可以检测铁磁材料和顺磁材料产生的疲劳裂纹。虽然研制的一台仪器传感器的信号对对称裂纹的分布是不对称的，但通过对疲劳裂纹形状测量中的裂纹周长进行平面检测，认为通过将两条感应线布置在天线上，得到了对称的信号分布。开发了一种新的非接触式无损检测技术，该技术可以在不考虑材料质量的情况下检测裂纹。较少

项目成果

佐藤 雅子: "小アンテナによる新しい電磁探傷法の開発に関する研究"日本機械学会論文集(A編). 65-63. 925-931 (1999)

Masako Sato：“使用小型天线的新型电磁探伤方法的开发”，日本机械工程师学会会刊（A版）65-63（1999）。

Yasumoto Sato: "Nondestructive Inspection Based on Electoromagnetic Technique-Potential Drop and Micro Antenna techniques-"Proceedings of The Sixth International Conference on Material Issues in Design, Manufacturing and Operation of Nuclear Power Plants

佐藤康元：《基于电磁技术的无损检测——电位降和微天线技术——第六届国际核电站设计、制造和运行材料问题会议论文集

Yasumoto Sato: "Crack Detection by a Small Loop Antenna"Electro-magnetic Nondestructive Evaluation (VI). (in press).

佐藤泰元：《小环天线裂纹检测》电磁无损评价（六）。

Tetsuo Shoji: "Development of Novel NDE techniques and their Significance in the COE program on the Physics and Chemistry of Fracture and Failure Prevention"International Journal of Applied Electromagnetics and Mechanics. (in press).

Tetsuo Shoji：“新型 NDE 技术的发展及其在断裂和失效预防的物理和化学 COE 项目中的意义”《国际应用电磁学和力学杂志》。

Kenichi Yagi: "Crack Detection by Means of Electromagnetic Field Measurement with Micro Antennas"Proceedings of APCFS'01 & ATEM'01), October 20-22, 2001, Sendai, Japan. 1. 280-285 (2001)

Kenichi Yagi：“通过微天线电磁场测量进行裂纹检测”APCFS01 论文集