VYHNÁNEK, J. and P. RIPKA. Experimental Comparison of the Low-Frequency Noise of Small-Size Magnetic Sensors. IEEE Transactions on Magnetics. 2017, 53(4), ISSN 0018-9464. DOI 10.1109/TMAG.2016.2633398.
Small-size ac magnetic-field sensors are used for nondestructive testing (NDT), magnetic particle detection, and other applications, which require high spatial resolution. Up to now, inductive coils dominated this area, as their sensitivity at kHz frequencies, is superior to other magnetic sensors. However, some applications, such as magnetic imaging through conducting sheath, require lower working frequencies, in extreme case units of Hz. We successfully replaced inductive coils by an AMR sensor in NDT application and for distance measurement. In this paper, we compare designs of miniature ac magnetic field sensors, their achievable frequency characteristics, dynamic range, and noise parameters.
eng
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
IEEE
dc.relation.ispartof
IEEE Transactions on Magnetics
dc.subject
magnetic sensors
eng
dc.subject
noise measurement
eng
dc.title
Experimental Comparison of the Low-Frequency Noise of Small-Size Magnetic Sensors