基于涡流线圈提离效应的深裂纹检测方法研究  

A New Method for Detection of Deep Cracks Based on Lift-off Effect of the Eddy Current Coil

作　　者：张东利 武美先[2,3] 王闯龙 ZHANG Dongli;WU Meixian;WANG Chuanglong(School of Mechanical and Electrical Engineering,Beifang University of Nationalities,Yinchuan 750021,Yinchuan;School of Chemistry and Chemical Engineering,Beifang University of Nationalities,Yinchuan 750021,Yinchuan;Key Laboratory of Chemical Engineering and Technology,State Ethnic Affairs Commission,North Minzu University,Yinchuan 750021,China;School of Electrical Information Engineering,Beifang University of Nationalities,Yinchuan 750021,Yinchuan)

机构地区：[1]北方民族大学机电工程学院,银川750021 [2]北方民族大学化学与化学工程学院,银川750021 [3]北方民族大学国家民委化工技术基础重点实验室,银川750021 [4]北方民族大学电气信息工程学院,银川750021

出　　处：《传感技术学报》2019年第9期1289-1296,共8页Chinese Journal of Sensors and Actuators

基　　金：北方民族大学重点科研项目(2019KJ36);国家自然科学基金项目(51667001);国家民委化工技术基础重点实验室一般科研项目(2017HG06)

摘　　要：为了提高涡流探头检测厚壁结构中深裂纹的能力,使用ANSYS有限元模型研究了圆形和矩形两类涡流激励线圈的提离效应对涡流渗透深度的影响,发现当线圈轴线和材料表面之间的夹角发生变化时,其所产生的提离效应会对涡流的分布产生较大影响。通过分析材料表面各点处涡流渗透深度的变化情况,发现当矩形线圈倾斜60°时进行激励可在材料中感应出最大渗透深度的涡流,用于深层缺陷的检测。为了提高深裂纹的检测效果,对矩形线圈的参数进行了优化,进一步提高了探头的性能。In order to improve the ability of eddy current probe to detect deep cracks in thick-walled structures,this paper uses ANSYS finite element model to study the effect of lift-off on eddy current penetration depth for circular and rectangular eddy current excitation coils.It was found that when the angle between the coil axis and the material surface changes,a greater impact will be made on the distribution of eddy currents.By analyzing the eddy current penetration depth at different points on the surface of material,it is found that when the inclination angle of the rectangular coil reaches 60 degrees,the eddy current with the maximum penetration depth can be induced in the material,which can be used for detection of deep defects.In order to strengthen the effect of lift-off for detecting deep cracks at specific measuring points,the parameters of the coil were optimized,and the performance of the probe was further improved.

关 键 词：涡流检测 涡流探头 提离效应 性能优化 深裂纹 

分 类 号：TB972[一般工业技术—计量学]