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Eddy Currents01:25

Eddy Currents

2.4K
Since eddy currents occur only in conductors, magnets can separate metals from other materials. For example, in a recycling center, trash is dumped in batches down a ramp, beneath which lies a powerful magnet. Conductors in the trash are slowed by eddy currents, while nonmetals in the trash move on, separating from the metals. This works for all metals, not just ferromagnetic ones.
Other major applications of eddy currents appear in metal detectors and the braking systems of trains and roller...
2.4K
Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

4.4K
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.
4.4K
Other Unique Bacteria01:18

Other Unique Bacteria

387
Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic...
387
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

6.2K
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.
6.2K
Magnetic Field Due To A Thin Straight Wire01:28

Magnetic Field Due To A Thin Straight Wire

6.0K
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.
6.0K
Ferromagnetism01:31

Ferromagnetism

2.9K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.9K

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Updated: Jan 9, 2026

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
06:17

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors

Published on: January 16, 2020

6.1K

回転磁気センサーアレイを用いた地下強磁性パイプライン探査

Xingen Liu1, Zifan Yuan1, Mingyao Xia1

  • 1School of Electronics, Peking University, Beijing 100871, China.

Sensors (Basel, Switzerland)
|December 11, 2025
PubMed
まとめ
この要約は機械生成です。

新しいワイヤレス磁気センサーアレイは、回転することで地下の強磁性パイプラインを検出し、複雑なアルゴリズムなしで位置と配向の評価を簡素化します。この技術は、工学用途でデシメートルレベルの精度を提供します。

キーワード:
位置特定磁気センサーアレイ配向推定回転スキャン地下パイプライン

さらに関連する動画

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
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Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

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Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing
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Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing

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関連する実験動画

Last Updated: Jan 9, 2026

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
06:17

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors

Published on: January 16, 2020

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Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

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Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing
10:52

Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing

Published on: March 8, 2020

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科学分野:

  • 地球物理学
  • センサー技術
  • パイプライン工学

背景:

  • 掘削は埋設パイプラインに重大なリスクをもたらします。
  • 地下パイプラインの正確な検出は、損傷を防ぐために不可欠です。

研究 の 目的:

  • 地下強磁性パイプラインを検出するための非侵襲的な方法を開発すること。
  • パイプライン測量の精度と効率を向上させること。

主な方法:

  • ワイヤレスで回転可能な磁気センサーアレイが設計されました。
  • アレイは、レールシステム上の複数のセンシングノードを利用します。
  • 移動性を高めるために、並進ではなくアレイの回転が採用されました。

主要な成果:

  • システムは、水平オフセットと埋設深度の位置特定においてデシメートルレベルの精度を達成しました。
  • パイプラインの配向（走向角）は、わずか数度の誤差で決定されました。
  • 磁気データの周期的な変動により、複雑な逆解析なしでパイプラインの識別が可能になりました。

結論:

  • 提案されたワイヤレス回転磁気センサーアレイは、地下強磁性パイプラインを効果的に検出します。
  • このシステムは、精度と使いやすさに関する一般的な工学用途の要件を満たしています。
  • この技術は、掘削中のパイプライン損傷を防ぐための実用的なソリューションを提供します。