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相关概念视频

Magnetic Field Due To A Thin Straight Wire01:27

Magnetic Field Due To A Thin Straight Wire

Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

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.
Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
Magnetic Vector Potential01:15

Magnetic Vector Potential

In electrostatics, the electric field can be written as the negative gradient of the potential. In magnetostatics, the zero divergence of the magnetic field ensures that the magnetic field can be expressed as the curl of a vector potential. This potential is known as the magnetic vector potential.
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...

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相关实验视频

Updated: Jul 18, 2026

Multimodal Imaging and Spectroscopy Fiber-bundle Microendoscopy Platform for Non-invasive, In Vivo Tissue Analysis
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基于V形多模无核多模纤维结构的高灵敏度矢量磁场传感器.

Yu Ji, Shengli Pu, Weinan Liu

    Optics letters
    |May 15, 2024
    PubMed
    概括

    使用表面等离子体共振的新型曲光纤传感器检测矢量磁场. 这种简单,低成本的设备为磁场强度和方向提供了高灵敏度.

    科学领域:

    • 光子学和光学传感器传感器
    • 对于传感器应用的材料科学.
    • 磁力学测量是一种磁力学测量.

    背景情况:

    • 光纤传感器在恶劣环境中提供优势.
    • 表面等离子共振 (SPR) 是一种敏感的检测技术.
    • 矢量磁场传感需要专门的传感器设计.

    研究的目的:

    • 提出和研究一个曲的多模无核多模光纤结构用于矢量磁场传感.
    • 为了利用表面等离子体共振效应提高灵敏度.
    • 以磁场强度和方向灵敏度来评估传感器的性能.

    主要方法:

    • 曲无核纤维 (NCF) 的制造,涂上金膜.
    • 使用NCF的 evanescent 场激发表面等离子共振 (SPR).
    • 使用磁流体作为磁感应材料用于磁场检测.

    主要成果:

    • 传感器对折射率变化 (5630 nm/RIU) 显示出高灵敏度.
    • 获得了对磁场强度 (5.74 nm/mT) 的高灵敏度.
    • 对磁场方向 (0.22 nm/°) 呈现出高灵敏度.

    更多相关视频

    A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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    结论:

    • 拟议的曲NCF SPR传感器有效用于矢量磁场传感.
    • 该传感器提供了简单的结构,低成本,点感应和优良的机械性能.
    • 这项技术对各种磁场监测应用具有前景.