永磁扰动检测有限元分析及优化设计

发布时间：2018-06-08 11:08

本文选题：内永磁扰动 + 外永磁扰动　；参考：《电工技术学报》2015年03期

【摘要】：永磁扰动检测是一种新型无损检测技术,通过永磁扰动传感器在铁磁构件表面扫查并拾取受缺陷影响下静磁场变化情况来判别缺陷尺寸大小。本文深入分析了永磁体与缺陷的扰动机制,并针对传感器设计理论不足、永磁扰动检测信号微弱等问题,提出了采用环绕式体线圈探测永磁体内产生的磁扰动及采用螺旋线圈探测永磁体与缺陷间的外磁扰动,并在此基础上探究感应线圈及永磁体的几何参数对永磁扰动检测效率的影响。通过有限元模型多参数化扫描及正交试验设计方法对永磁扰动传感器进行了优化设计,该方法能够有效地提高永磁扰动内、外感应电压的幅值。
[Abstract]:Permanent magnetic disturbance detection is a new kind of nondestructive testing technology. The size of the defect can be judged by the permanent magnetic disturbance sensor scanning and picking up the change of the static magnetic field under the influence of the defect on the surface of the ferromagnetic component. In this paper, the perturbation mechanism of permanent magnet and defect is deeply analyzed, and aiming at the problems such as insufficient design theory of sensor, weak signal of permanent magnet disturbance detection, etc. The magnetic disturbance caused by the permanent magnet and the external magnetic disturbance between the permanent magnet and the defect are detected by the circumferential body coil and the spiral coil respectively, and the magnetic disturbance between the permanent magnet and the defect is detected by the spiral coil. On this basis, the effect of geometric parameters of induction coil and permanent magnet on the detection efficiency of permanent magnetic disturbance is investigated. The optimal design of permanent magnetic disturbance sensor is carried out by means of finite element model multi-parametric scanning and orthogonal test design. This method can effectively increase the amplitude of the inductive voltage inside and outside the permanent magnetic disturbance.
【作者单位】：河北工业大学电磁场与电器可靠性省部共建重点实验室;天津工业大学电工电能新技术天津市重点实验室;
【基金】：国家自然科学基金(51207105;51307043) 河北省自然科学基金(E2012202026;E2012202048)资助项目
【分类号】：TG115.28

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