マイクロうず電流探傷技術（μ-ECT）とその応用
スポンサーリンク
概要
- 論文の詳細を見る
Eddy-current testing (ECT) technique is a well-known methodology of nondestructive evaluation technique that is usually applied to inspect the material flaws without changing or altering testing materials. Generally, ECT technique is used as crack detection in piping systems of nuclear power plants and as an imperfect welding spot detection on aircrafts. The advantage of ECT technique is to highly sense material conductivity which depends on many variables such as material thickness, crack, aging and etc.. The planar exiting coil and the advanced magnetic sensor instead of the conventional inductive ECT probe enable us to invent the probe structure and its applications. The proposed ECT probe consists of a planar meander coil as exciter and spin-valve type giant magnetoresistive (SV-GMR) sensor. The utilization of SV-GMR as a magnetic sensor of ECT probe provides the feasibility of high-spatial resolution, high-sensitivity to low magnetic fields, and high operating frequency range. Due to the SV-GMR advantages, the inspection of micro defect and the detection of micro conductors can be performed by the proposed ECT probe. We call this system“μ-ECT ”. The advanced SV-GMR sensor improves the on-site ECT system in the previous metal inspection industry and also invents a new application in a different industrial field. We proposed the ECT system to the inspection system to electronic products, the PCB inspection system and the recognition of solder bead for ball-grid array package. Defects on high-density PCB are examined by ECT technique. The inspection evaluates not only imperfections of the PCB conductor but also PCB conductor dimensions and alignment. We discuss the ECT system and the experimental results.
- 電気製鋼研究会の論文
著者
関連論文
- 実用設計を想定した磁気式限流器磁心寸法の数値解析とその試作(パワーマグネティックス)
- 低周波交流磁界に応答する遺伝子の同定(生体磁気)
- 低周波交流磁界に応答する遺伝子の同定
- 永久磁石反発形磁気軸受の振動モード検出と可変剛性システム
- 反発浮上小型磁気軸受の回転特性と振動回避法の提案(モータ・アクチュエータ)
- ECT応用を目指したSV-GMRセンサの高周波数微小磁界振幅特性(計測・高周波デバイス)
- 超長波交流磁界曝露による細菌細胞の影響(生体磁気・医療応用)
- 磁界による細菌細胞のDNA損傷及び生理状態への影響(生体磁気・医療応用)
- The First Asia-Pacific Symposium on Applied Electromagnetics and Mechanics (APSAEM06)
- 磁気ビーズによる生体物質分離用磁気分離装置の開発に関する検討(生体磁気・医療応用)
- 新しいうず電流探傷プローブによる溶接部欠陥検査に関する研究
- プリント基板検査におけるマルチECTプローブの感度向上への検討(センサ・計測)
- うず電流探傷法による高密度プリント基板検査法に関する研究
- マイクロうず電流探傷技術（μ-ECT）とその応用
- 3^ janzs 2004 報告2(第3回日本-オーストラリア-ニュージーランド合同セミナー)
- 磁気応用の多様性と研究手法
- 電力施設からの極低周波磁界の環境計測と評価に関する研究
- 磁束収束型リニア誘導モータの動作特性解析に関する研究