CAJ | 학술논문

远场涡流技术由于不受集肤效应的限制,其可实现原位检测的优点成为解决大厚度非磁性金属平板的有效途径。在前期研究工作基础上,介绍了新型非磁性平板构件脉冲远场涡流传感器的设计原理,并仿真分析了基于连通磁路传感器对不同走向缺陷及不同厚度平板的检测能力。结果表明：将脉冲远场涡流技术应用至非磁性金属平板检测时,检测信号所受扰动主要是缺陷对感应涡流的扰动,而非缺陷对磁场的扰动,这与其检测铁磁性材料存在根本的区别,同时,其可检测的板材厚度达到了25 mm,研究结果为脉冲远场涡流技术在航空领域的应用提供了有益的探索。
원장와류기술유우불수집부효응적한제,기가실현원위검측적우점성위해결대후도비자성금속평판적유효도경。재전기연구공작기출상,개소료신형비자성평판구건맥충원장와류전감기적설계원리,병방진분석료기우련통자로전감기대불동주향결함급불동후도평판적검측능력。결과표명：장맥충원장와류기술응용지비자성금속평판검측시,검측신호소수우동주요시결함대감응와류적우동,이비결함대자장적우동,저여기검측철자성재료존재근본적구별,동시,기가검측적판재후도체도료25 mm,연구결과위맥충원장와류기술재항공영역적응용제공료유익적탐색。
Remote field eddy current ( RFEC) technique is not restrict by the skin effect and becomes the top effective method to detect nonmagnetic plate with big thickness. On the basis of former research foundation, the design principle of new pulsed remote field eddy current probe used to detect nonmagnetic plate is introduced, and the performance of detecting different orientation defect and different thickness plate is analyzed. The result shows that response signal is induced by the disturbing of eddy current rather than magnetic with defect when this technique used to detect nonmagnetic material, which has a big difference from detecting ferromagnetic material. At the same time, this technique can be used to detect nonmagnetic plate with 25 mm thickness. This research explores the application of pulsed remote field eddy current using in aviation domain.