DocumentCode :
1321488
Title :
Integration of Hall and Giant Magnetoresistive Sensor Arrays for Real-Time 2-D Visualization of Magnetic Field Vectors
Author :
Kim, Jungmin ; Lee, Jinyi ; Jun, Jongwoo ; Le, Minhhuy ; Cho, Changhyun
Author_Institution :
Res. Center for Real Time NDT, Chosun Univ., Gwangju, South Korea
Volume :
48
Issue :
11
fYear :
2012
Firstpage :
3708
Lastpage :
3711
Abstract :
In this study, we combined an array of giant magnetoresistive (GMR) sensors with an array of Hall sensors to measure all three components of magnetic vectors with a high spatial resolution and visualize the magnetic field distribution on a 2-D plane. The sensors were arrayed in a matrix arrangement such that the limitation to the number of sensors could be overcome. To test the device, we generated a magnetic field using a pancake-type magnetizer and a cracked magnetized ferromagnetic specimen and imaged the vectors. We obtained a spatial resolution of 0.78 mm in the z-direction with 1024 Hall sensors and 2.34 mm in the x-direction with 100 GMR sensors. Moreover, the x and z components could be imaged at 6 fps. The proposed device is promising for application in magnetic flux leakage detection.
Keywords :
giant magnetoresistance; magnetic flux; magnetic sensors; magnetoresistive devices; matrix algebra; GMR sensor; Hall sensors; cracked magnetized ferromagnetic specimen; giant magnetoresistive sensor array; hall integration; high spatial resolution; magnetic ίux leakage detection; magnetic field vectors; matrix arrangement; pancake-type magnetizer; real-time 2-D visualization; size 0.78 mm; size 2.34 mm; Magnetic flux leakage; Magnetic resonance imaging; Magnetic sensors; Sensor arrays; Spatial resolution; Superconducting magnets; Vectors; Giant magnetoresistance; hall sensor arrays; magnetic field visualization; magnetic sensors;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2012.2200662
Filename :
6332808
Link To Document :
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