Evaluation of Directional Dependence of Sensitivity for Room-Temperature Magnetic Flux Sensors With Wide Sensitivity Region
Evaluation of Directional Dependence of Sensitivity for Room-Temperature Magnetic Flux Sensors With Wide Sensitivity Region
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宽灵敏度区域室温磁通传感器灵敏度方向依赖性的评估
DOI：
10.1109/tmag.2020.3008912
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发表时间：
2021
影响因子：
2.1
通讯作者：
Terazono Yasushi
中科院分区：
文献类型：
--
作者：
Adachi Yoshiaki;Mizuhara Yuki;Terazono Yasushi
近年来，室温（RT）磁通传感器已开始应用于生物磁测量。与超导量子干涉装置（SQUID）磁通传感器不同，RT传感器有一个很大的优势，即它们可以放置在离磁源更近的地方，并获得更大的信号。然而，当RT传感器放置在离磁源较近的位置时，灵敏度区的尺寸不可忽略，在进行磁源分析时，需要考虑灵敏度的方向依赖性来估计理论磁信号。我们提出了一种利用沿圆弧排列的线圈阵列来评估RT传感器对相邻磁源响应灵敏度的方向依赖性的方法。结果表明，在一定空间范围内，基于特定磁阻器件的磁通传感器具有钟形曲线的灵敏度方向依赖性。我们还提出了钟形轮廓的多灵敏度点模型，并估计了灵敏度区域内的灵敏度分布，期望能有效地提高使用RT传感器阵列进行磁源分析的精度。
Recently, the room-temperature (RT) magnetic flux sensors have begun to be applied to biomagnetic measurements. The RT sensors have a large advantage that they can be placed closer to the magnetic sources and obtain larger signals, unlike the superconducting quantum interference device (SQUID) flux sensors. However, when an RT sensor is placed closer to the sources, the dimension of the sensitivity region cannot be negligible, and the directional dependence of sensitivity should be considered to estimate the theoretical magnetic signals for magnetic source analysis. We proposed a method to evaluate the directional dependence of the sensitivity of the RT sensors in response to adjacent magnetic sources using the array of coils arranged along a circular arc. Consequently, it was revealed that a specific magnetoresistance device-based flux sensor with a certain spatial extent had the directional dependence of sensitivity with a bell-shaped profile. We also proposed the multiple sensitivity points model for the bell-shaped profile and estimated the sensitivity distribution over the sensitivity region, which is expected to be effective in improving the accuracy of the magnetic source analysis using an RT sensor array.
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影响因子：
4.3
作者：
Wang, Meiling;Wang, Yang;Ye, Chaofeng
通讯作者：
Ye, Chaofeng
使用磁阻传感器阵列的心磁图。
影响因子：
1.5
作者：
Y. Shirai;K. Hirao;Tomohiko Shibuya;Shuichi Okawa;Y. Hasegawa;Y. Adachi;K. Sekihara;S. Kawabata
通讯作者：
S. Kawabata
用于生物磁测量的室温磁传感器阵列的校准
DOI：
--
发表时间：
2019
期刊：
影响因子：
--
作者：
Yoshiaki Adachi;Daisuke Oyama;Yasushi Terazono;Tetsuo Hayashi;Tomohiko Shibuya;Shigenori Kawabata
通讯作者：
Shigenori Kawabata
影响因子：
2.1
作者：
ERNE, SN;NARICI, L;ROMANI, GL
通讯作者：
ROMANI, GL