PCCP管远场涡流检测激励线圈布置方式研究  

Study on Excitation Coil Arrangement for Remote Field Eddy Current Detection in PCCP

作　　者：商峰[1] 王正 董猛 SHANG Feng;WANG Zheng;DONG Meng(Research Center for Sustainable Hydropower Development,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]中国水利水电科学研究院水电可持续发展研究中心,北京100038 [2]山东科技大学土木工程与建筑学院,山东青岛266590

出　　处：《测控技术》2019年第6期28-32,37,共6页Measurement & Control Technology

基　　金：国家重点研发计划(2018YFC0406903);中国水利水电科学研究院科研专项(SS0145B122017)

摘　　要：基于远场涡流原理应用三维有限元方法研究激励线圈在PCCP管壁内的布设方式,分析了激励线圈的大小、位置,以及断丝所处环向位置对断丝检测效果的影响。结果表明,激励线圈与管道同轴布置时,保持激励电流密度不变,激励线圈的大小不会影响断丝检测的精度;当激励线圈布置于管壁附近时,可以检测出断丝的轴向位置和环向位置,此时,Br相位比Bz相位更适于作为检测指标,为实际运用远场涡流检测设备定位断丝区域提供了指导。On the basis of remote field eddy current(RFEC)theory,the three-dimensional finite element method is used to investigate the excitation coil arrangement inside the prestressed concrete cylinder pipe wall.The influences of the size and position of the excitation coil and the circumferential position of the broken wires on the wire breakage detection were discussed.The analysis shows that when the excitation coil is coaxially arranged with the pipe,the excitation current density is kept constant and the size of the coil does not affect the accuracy of the wire breakage detection.When the excitation coil is arranged close to the pipe wall,the axial position and circumferential position of the broken wires can be located.In this situation,the Br phase is more suitable as a detection index than the Bz phase,which provides guidance for the practical application of RFEC testing equipment to detect the position of wire breakage.

关 键 词：预应力钢筒混凝土管 远场涡流 断丝检测 有限元 

分 类 号：TG115.28[金属学及工艺—物理冶金] TP274[金属学及工艺—金属学]