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相关概念视频

Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

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Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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相关实验视频

Updated: Jun 21, 2025

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
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Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

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磁梯度张量测量系统的结构设计和参数优化

Gaigai Liu1, Yingzi Zhang1, Wenyi Liu1

  • 1State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China.

Sensors (Basel, Switzerland)
|July 13, 2024
PubMed
概括

优化磁梯度张差 (MGT) 测量结构可以减少未爆炸弹药检测等应用中的错误. 一个平面的十字形设计提供了最小的误差,指导MGT系统的建设.

科学领域:

  • 地质物理学 地质物理学
  • 传感器技术 传感器技术
  • 应用电磁学 应用电磁学

背景情况:

  • 使用磁梯度张器 (MGT) 的磁异常检测 (MAD) 对于未爆炸弹药 (UXO) 检测和矿产勘探至关重要.
  • 目前使用差异近似方法的MGT测量系统存在固有的测量错误.
  • 优化传感器几何和结构参数是减少这些错误的关键.

研究的目的:

  • 提出和评估简化的平面MGT测量结构.
  • 分析影响MGT系统基线距离的因素.
  • 为构建改进的MGT测量系统提供指导.

主要方法:

  • 开发了三个简化的平面MGT测量结构.
  • 基线距离设计因素的理论分析.
  • 使用磁双极模型进行错误分析.
  • 使用控制变量方法进行模拟和验证.

主要成果:

  • 平面的十字形结构表现出最小的测量误差 (3.15 × 10-10 T/m).
  • 最佳基线距离受目标磁矩,检测距离,传感器分辨率和噪声水平的影响.
  • 更小的磁矩,更长的检测距离,更低的传感器分辨率和更高的噪声需要更大的基线距离.
关键词:
基线距离是基线距离.流量门磁力计的流量门磁力计磁性异常检测检测 磁性异常检测磁梯度张力测量测量磁梯度张力测量传感器阵列是一系列的传感器阵列.

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Last Updated: Jun 21, 2025

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Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

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High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
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High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

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结论:

  • 平面十字形结构是MGT测量系统的最佳设计.
  • 了解系统参数和基线距离之间的相互作用对于有效的MGT系统设计至关重要.
  • 这项研究为开发更准确的MGT系统提供了宝贵的见解,用于各种地质物理应用.