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相关概念视频

Magnetic Force01:18

Magnetic Force

1.8K
In addition to the electric forces between electric charges, moving electric charges exert magnetic forces on each other. A magnetic field is created by a moving charge or a group of moving charges known as the electric current. A magnetic force is experienced by a second current or moving charge in response to this magnetic field. Fundamentally, interactions between moving electrons in the atoms of two bodies produce magnetic forces between them.
The magnetic force acting on a moving charge...
1.8K
Magnetic Damping01:17

Magnetic Damping

984
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
984
Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

4.5K
Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and  the vector product of the length vector along the current element and the field due to the first conductor. According to the...
4.5K
Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

2.0K
In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
2.0K
Magnetic Force On A Current-Carrying Conductor01:25

Magnetic Force On A Current-Carrying Conductor

4.8K
Moving charges experience a force in a magnetic field. Since the magnetic fields produced by moving charges are proportional to the current, a conductor carrying a current creates a magnetic field around it.
Consider a compass placed near a current-carrying wire. The wire experiences a force that aligns the needle of the compass tangentially around the wire. Thus, the current-carrying wire produces concentric circular loops of magnetic field. The magnetic field generated by a wire can be...
4.8K

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相关实验视频

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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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液体固体混合磁力机械力传感器

Tatsuya Yamamoto1, Tomohiro Ichinose1, Hiroki Yasuga1

  • 1National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan.

Nano letters
|December 23, 2025
PubMed
概括
此摘要是机器生成的。

新的磁流体力传感器为微妙的物体操纵提供高灵敏度. 这些半导体兼容的传感器使用磁道连接和磁流体检测100μN以下的力.

关键词:
磁性流体是一种磁性流体.强力传感器是一种强力传感器.磁道交叉点 磁道交叉点磁力机械学 磁力机械学磁电阻是指磁电阻的电阻.

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Microfabricated Post-Array-Detectors mPADs: an Approach to Isolate Mechanical Forces
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Microfabricated Post-Array-Detectors mPADs: an Approach to Isolate Mechanical Forces
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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 传感器技术 传感器技术

背景情况:

  • 高灵敏度的力传感器对于精确的执行器控制至关重要,特别是对于脆弱的物体.
  • 现有的使用张力计或压电元件的传感器缺乏与半导体电路的单体集成,增加成本和限制性能.
  • 对于具有成本效益,高性能传感系统,需要单体集成.

研究的目的:

  • 开发新型,半导体兼容的力传感器,具有高灵敏度,用于微牛顿力检测.
  • 克服传统力传感器在集成和成本方面的局限性.
  • 探索用于传感应用的磁流体-MTJ (磁道连接) 系统的磁力机械性能.

主要方法:

  • 使用半导体兼容的大规模生产工艺制造磁道连接点 (MTJs).
  • 将MTJ与磁流体 (MF) 集成,以创建MF-MTJ传感器.
  • 通过道磁阻效应对机械负荷的传感器响应的表征.

主要成果:

  • 开发了MF-MTJ力传感器,能够检测100μN以下的机械负荷.
  • 证明MTJs尽管缺乏常规应变诱导的电阻变化,但通过与MF的磁力机械相互作用表现出敏感性.
  • 经过10^4周期负载试验,证实磁力学性能没有退化,表明了强度.

结论:

  • MF-MTJ传感器为与半导体制造相容的高灵敏力检测提供了一个有希望的,具有成本效益的解决方案.
  • 新型磁力机械传感机制能够精确地处理和描述脆弱的物体.
  • 开发的传感器显示了集成到先进的机器人和微操作系统的潜力.