Analysis of the inducing frequency of a U-shaped ACFM system

被引：37

作者：

Li Wei ^{[1
]}

Chen Guoming ^{[1
]}

Li Wenyan ^{[1
]}

Li Zhun ^{[1
]}

Liu Feng ^{[1
]}

机构：

[1] China Univ Petr, Coll Machinery & Elect Engn, Dept Electromech Engn, Shandong Dongying 257061, Peoples R China

来源：

NDT & E INTERNATIONAL | 2011年 / 44卷 / 03期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

ACFM; Inducing frequency; Simulation analysis; Defect signals; CURRENT FIELD MEASUREMENT; CRACK DEPTH PROFILE; NETWORK; METALS; PROBE;

D O I：

10.1016/j.ndteint.2010.10.009

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

According to the principle of the alternating current field measurement (ACFM), the inducing frequency has a significant influence on the signal acquisition and the measurement accuracy of an ACFM system. To design an ACFM prototype system with a U-shaped probe, the inducing frequency of the ACFM system is determined through simulation analysis and an experimental study in this paper. A large number of simulations are designed and run to analyze the influences of the inducing frequency on characteristic vectors of the induction electromagnetic field. By analyzing the simulation results, 6 kHz is selected to be the optimal inducing frequency for the U-shaped probe of an ACFM prototype. This frequency is tested by real crack inspection experiments using the U-shaped probe of the ACFM prototype in laboratory. The results show that 6 kHz is appropriate to realize the crack inspection and sizing with reasonable accuracy. The result in this paper will benefit the design and manufacturing of the prototype for the U-shaped probe ACFM system. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：324 / 328

页数：5

共 9 条

[1] Removal of Probe Liftoff Effects on Crack Detection and Sizing in Metals by the AC Field Measurement Technique [J].