透射式涡流渗透深度的仿真与实验  

Simulation and experiment of penetration depth of transmission eddy current

作　　者：常祥 周德强 王华[1] 曹丕宇[1] CHANG Xiang;ZHOU De-qiang;WANG Hua;CAO Pi-yu(School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China;Key Laboratory for Advanced Food Manufacturing Equipment Technology of Jiangsu Province,Wuxi 214122,China;Key Laboratory of Nondestructive Testing,Ministry of Education,Nanchang Hangkong University,Nanehang 330063,China)

机构地区：[1]江南大学机械工程学院,江苏无锡214122 [2]江苏省食品先进制造装备技术重点实验室,江苏无锡214122 [3]无损检测技术教育部重点实验室南昌航空大学,江西南昌330063

出　　处：《传感器与微系统》2018年第11期54-57,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(51107053);无损检测技术教育部重点实验室开放基金资助项目(ZD201629001)

摘　　要：线圈尺寸的设计和激励频率的选择对于涡流检测至关重要。针对作为涡流检测行业标准的标准渗透深度方程没有考虑到线圈尺寸的影响问题,建立了透射式涡流检测的有限元仿真模型,研究了不同激励频率和不同尺寸探头对透射式涡流渗透深度的影响,并通过实验证实了仿真分析的有效性。仿真与实验结果表明:激励频率较高时,透射式涡流可检测到缺陷的深度大于标准渗透深度;较高的激励频率能保证更好的检测效果,且受线圈尺寸影响较小。Design of coil size and selection of excitation frequency are essential for eddy current testing.The standard penetration depth equation as the standard for eddy current testing does not take into account the effect of coil size.Aiming at this problem,a finite element simulation model for transmission eddy current detection is established.The influence of different excitation frequency and different size probe on penetration depth of transmission eddy current is studied.The validity of simulation analysis is proved by experiments. Simulation and experimental results show that：When the excitation frequency is high,the transmission eddy current can detect the depth of the defect is greater than the standard penetration depth,and the higher excitation frequency can guarantee better detection effect; higher excitation frequency can ensure better detecting effect,and it is less affected by coil size.

关 键 词：涡流 透射 渗透深度 非铁磁性材料 

分 类 号：TH39[机械工程—机械制造及自动化] TG156[金属学及工艺—热处理]