Electromagnetic testing and image reconstruction with flexible scanning tablets

Yoshihiro Nishimura; Kamen Kanev; Sasamoto Akira; Takayuki Suzuki; Hiroshi Inokawa

doi:10.1117/12.822833

30 March 2009 Electromagnetic testing and image reconstruction with flexible scanning tablets

Yoshihiro Nishimura, Kamen Kanev, Sasamoto Akira, Takayuki Suzuki, Hiroshi Inokawa

Proceedings Volume 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009; 72924I (2009) https://doi.org/10.1117/12.822833
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

Abstract

An eddy current testing (ECT) and an electromagnetic acoustic testing (EMAT) employ electromagnetic methods to induce an eddy current and to detect flaws on or within a sample without directly contacting it. ECT produces Lissajous curves, and EMAT gives us a time series of signal data, both of which can be directly displayed on nondestructive testing (NDT) equipment screens. Since the interpretation of such output is difficult for untrained persons, images need to be properly reconstructed and visualized. This could be carried out by single-probe 2/3D scanners with imaging capabilities or with array probes, but such equipment is often too large or heavy for ordinary on-site use. In this study, we introduce a flexible scanning tablet for on-site NDT and imaging of detected flaws. The flexible scanning tablet consists of a thin film or a paper with a digitally encoded coordinate system, applicable to flat and curved surfaces, that enables probe positions to be tracked by a specialized optical reader. We also discuss how ECT and EMAT probe coordinates and measurement data could be simultaneously derived and used for further image reconstruction and visualization.

Citation Download Citation

Yoshihiro Nishimura, Kamen Kanev, Sasamoto Akira, Takayuki Suzuki, and Hiroshi Inokawa "Electromagnetic testing and image reconstruction with flexible scanning tablets", Proc. SPIE 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009, 72924I (30 March 2009); https://doi.org/10.1117/12.822833

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available