Combination of a GMR sensor and reconstruction algorithm: a novel magnetic sensing system

Akira Sasamoto; Takayuki Suzuki

doi:10.1117/12.882644

18 April 2011 Combination of a GMR sensor and reconstruction algorithm: a novel magnetic sensing system

Akira Sasamoto, Takayuki Suzuki

Proceedings Volume 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011; 79833Q (2011) https://doi.org/10.1117/12.882644
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

Abstract

Over the past few years, the authors have developed a reconstruction algorithm that can accurately reconstruct images of flaws from data obtained using conventional ECT sensors. The algorithm is simple and fast and involves few steps, thus making it suitable for implementation on a PC. The algorithm can be applied to study eddy current systems; it can also be used in conjunction with non-destructive testing methods involving a magnetic field. However, there is one inherent limitation related to sensor design. In eddy current or magnetic flux leakage, a conventional sensor is used to detect flaws in damaged areas. This sensor is designed in such a manner that when the magnetic field is imposed on the target surface, the strength of the magnetic field is maximized. This measurement method has remained unchanged since the introduction of the technique. The developed reconstruction algorithm is designed for data obtained by imposing a uniform magnetic field on the target surface. Recent developments in computer technology have enabled the integration of computing and testing equipment; in this context, the authors believe that a new sensor for use with reconstruction algorithm will be required. Therefore, the authors have developed a prototype sensor for applications to magnetic flux leakage. The developed sensor comprises a GMR magnetic field sensor to detect a static magnetic field and two magnets adjacent to the GMR sensor to magnetize the target specimen. The results of the combined use of the sensor and the reconstruction algorithm are presented in this paper.

Citation Download Citation

Akira Sasamoto and Takayuki Suzuki "Combination of a GMR sensor and reconstruction algorithm: a novel magnetic sensing system", Proc. SPIE 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011, 79833Q (18 April 2011); https://doi.org/10.1117/12.882644

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

Magnetism

Reconstruction algorithms

Magnetic sensors

Algorithm development

Point spread functions

Inspection

Show All Keywords

Keywords/Phrases

Search In:

Publication Years