NDLI: Scan Type Magnetic Camera Images with a High Spatial Resolution for NDT Obtained By Using a Linearly Integrated Hall Sensors Array

Content Provider	IEEE Xplore Digital Library
Author	Jiseong Hwang Jinyi Lee Jongwoo Jun Renliang Wang Seho Choi Seongpyo Hong
Copyright Year	2007
Description	Author affiliation: Chosun Univ., Gwangju (Jiseong Hwang)
Abstract	Magnetic flux leakage testing (MFLT), which measures the distribution of a magnetic field on the magnetized specimen by using a magnetic sensor such as the Hall sensor, is an effective nondestructive testing (NDT) method for detecting surface crack on magnetized ferromagnetic materials. A scan type magnetic camera, based on the principle of MFLT, uses inclined Hall sensors array on the printed circuit board (PCB) to detect small cracks in high speed. However, the waveforms appear in the direction perpendicular to the scan, because the sensors are bonded at different gradients and heights on a PCB in spite of careful soldering. In this paper, the linearly integrated Hall sensors (LIHS) on a wafer are proposed to minimize these waves and to improve the probability of crack detection. The specimen took from a billet is used to determine the effectiveness of the LIHS in the multiple cracks detection.
Starting Page	1
Ending Page	6
File Size	2685247
Page Count	6
File Format	PDF
ISBN	1424409640
DOI	10.1109/IST.2007.379591
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-05-05
Publisher Place	Poland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sensor arrays Cameras Spatial resolution Image sensors Magnetic sensors Magnetic flux leakage Nondestructive testing Magnetic field measurement Materials testing Leak detection hall sensor magnetic camera sensor array image processing nondestructive evaluation magnetic flux leakage crack
Content Type	Text
Resource Type	Article

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