Scan Type Magnetic Camera Images with a High Spatial Resolution for NDT Obtained By Using a Linearly Integrated Hall Sensors Array
Scan Type Magnetic Camera Images with a High Spatial Resolution for NDT Obtained By Using a Linearly Integrated Hall Sensors Array
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使用线性集成霍尔传感器阵列获得用于无损检测的高空间分辨率扫描型磁相机图像
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Seong
中科院分区：
文献类型：
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作者：
Jiseong Hwang;Jinyi Lee;Jongwoo Jun;Renliang Wang;Seho Choi;Seong
漏磁检测（MFLT）是利用霍尔传感器等磁传感器测量磁化试件上磁场的分布情况，是检测磁化铁磁材料表面裂纹的有效无损检测（NDT）方法。扫描型磁相机基于MFLT原理，利用印刷电路板（PCB）上倾斜的霍尔传感器阵列来高速检测微小裂纹。然而，波形出现在垂直于扫描的方向上，因为尽管经过仔细焊接，传感器还是以不同的梯度和高度粘合在 PCB 上。在本文中，提出了在晶圆上安装线性集成霍尔传感器（LIHS）来最大限度地减少这些波并提高裂纹检测的概率。从钢坯中取出的样本用于确定 LIHS 在多重裂纹检测中的有效性。
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.