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相关概念视频

Magnetic Force01:18

Magnetic Force

985
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...
985
Magnetic Field Due To A Thin Straight Wire01:28

Magnetic Field Due To A Thin Straight Wire

4.9K
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.
4.9K
Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

2.6K
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.
2.6K
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

4.1K
The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
4.1K
Magnetic Damping01:17

Magnetic Damping

477
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...
477
Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

1.5K
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.
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相关实验视频

Updated: Jul 15, 2025

Magnetic Tweezers for the Measurement of Twist and Torque
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灵活的磁性皮肤传感器阵列用于扭转感知.

Lucja Stawikowska1, Erik D Engeberg2

  • 1Ocean & Mechanical Engineering, Florida Atlantic University, Boca Raton, USA.

Proceedings. Florida Conference on Recent Advances in Robotics
|October 5, 2023
PubMed
概括
此摘要是机器生成的。

这项研究表明,新的柔性磁传感器和人工神经网络 (ANN) 可以准确地检测扭曲,改善截肢者的假肢手感.

关键词:
磁传感器是一个磁传感器.假肢手的使用方法机器人皮肤 机器人皮肤可伸缩的传感器可以伸缩.触觉传感器是一种触觉传感器.

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相关实验视频

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科学领域:

  • 生物医学工程 生物医学工程
  • 机器人技术 机器人技术 机器人技术
  • 材料科学 材料科学 材料科学

背景情况:

  • 目前的假肢手缺乏人类手的复杂触觉感应,特别是在检测扭力方面.
  • 灵活的触觉传感器为复制人体皮肤的自然伸展和运动提供了一个有希望的解决方案.
  • 假肢技术在扭力负荷的感觉方面存在很大的差距,这对于精细运动控制至关重要.

研究的目的:

  • 研究灵活的磁传感器阵列与人工神经网络 (ANN) 结合用于检测和分类扭力力的有效性.
  • 为了解决上肢假肢感官反的局限性.

主要方法:

  • 开发了一种灵活的磁传感器阵列 (在霍尔效应传感器上使用弹性体中的3x3磁铁).
  • 一个机器人臂将十个不同的扭矩值应用于传感器阵列,以持续收集数据.
  • 使用收集的传感器数据训练了一个人工神经网络 (ANN),用于分类应用的扭矩.

主要成果:

  • 在预测应用扭矩方面,ANN 实现了 97.48% ± 0.33% 的平均训练分类准确度.
  • 灵活的磁传感器成功地检测出磁场中因应用于扭矩而引起的位移.
  • 通过机器人手臂的扭矩应用,确保了一致的数据采集.

结论:

  • 开发的柔性磁传感器阵列和ANN系统在检测和分类扭转方面表现出高准确性.
  • 这种新的传感器技术有可能显著提高假肢手的触觉.
  • 改进的感官反可能会导致截肢者更直观和功能化的假肢设备.