[1]于腾飞,任尚坤,张 丹.基于EMAT检测系统的阻抗匹配研究与分析[J].焊管,2018,41(9):51-54,58.[doi:10.19291/j.cnki.1001-3938.2018.09.011]
 YU Tengfei,REN Shangkun,ZHANG Dan.Research and Analysis of Impedance Matching Based on EMAT Detection System[J].,2018,41(9):51-54,58.[doi:10.19291/j.cnki.1001-3938.2018.09.011]
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基于EMAT检测系统的阻抗匹配研究与分析()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
41
期数:
2018年第9期
页码:
51-54,58
栏目:
经验交流
出版日期:
2018-09-28

文章信息/Info

Title:
Research and Analysis of
Impedance Matching Based on EMAT Detection System
文章编号:
10.19291/j.cnki.1001-3938.2018.09.011
作者:
于腾飞任尚坤张 丹
南昌航空大学 无损检测技术教育部重点实验室,南昌 330063
Author(s):
YU TengfeiREN ShangkunZHANG Dan
Key Laboratory of Nondestructive Testing of Ministry of Education,Nanchang Hangkong University,Nanchang 330063,China
关键词:
焊管检测电磁超声阻抗匹配涡流场堆积线圈
Keywords:
welded pipe detection electromagnetic acoustic transducers  impedance matching vortex field accumulates coil
分类号:
TE115.28
DOI:
10.19291/j.cnki.1001-3938.2018.09.011
文献标志码:
B
摘要:
为了提高电磁超声(EMAT) 检测技术在焊管无损探伤中的检测效率,针对EMAT换能效率、回波信号幅值和信噪比较低的问题,对EMAT检测系统电路的阻抗匹配效果进行了研究。研究采用了从激励线圈和涡流场的耦合作用来推导涡流场与线圈阻抗关系的方法,建立了由完全相同的单层细线圈组成的堆积线圈模型。理论计算表明,减小涡流场和处于非活跃状态线圈的电阻值,会显著提高换能的效率。
Abstract:
In order to improve the detection efficiency of electromagnetic acoustic transducers (EMAT) detection technology in non-destructive testing for welded pipes, the impedance matching effect of EMAT detection system circuit was studied for the problems of EMAT conversion efficiency, echo signal amplitude and low signal-to-noise ratio. The coupling effect of the excitation coil and the vortex fields was used to derive the relationship between the vortex field and the impedance of the coil, and an accumulates coil model consisting of identical single-layer thin coils was established. Theoretical calculations show that reducing the vortex field and the resistance value of the coil of the inactive state could significantly improve the efficiency of the conversion.

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备注/Memo

备注/Memo:

收稿日期:2018-05-14

作者简介:于腾飞(1992—),男,硕士研究生,主要研究方向为电磁超声无损检测。

更新日期/Last Update: 2018-11-02