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Videos de Conceptos Relacionados

Displacement Current01:19

Displacement Current

3.8K
Ampère's law, in its usual form, does not work in places where the current changes with time and is not steady. Thus, Maxwell suggested including an additional contribution, called the displacement current, Id, to the real conduction current I.
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Position and Displacement01:31

Position and Displacement

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The position of an object defines its location relative to a convenient frame of reference at any particular time. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference, and we often describe the position of an object as it relates to stationary objects on Earth. For example, a rocket launch could be described in terms of the position of the rocket with respect to Earth as a whole. On the other...
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Encoding01:19

Encoding

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Information enters the brain through encoding, which is the input of information into the memory system. Once sensory information is received from the environment, the brain labels or codes it. The information is then organized with similar information and connected to existing concepts. Encoding occurs through automatic processing and effortful processing.
Automatic processing involves the encoding of details like time, space, frequency, and the meaning of words, usually done without conscious...
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Position and Displacement Vectors01:00

Position and Displacement Vectors

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To describe the motion of an object, one should first be able to describe its position (where it is at any particular time). More precisely, the position needs to be specified relative to a convenient frame of reference. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference to describe the position of an object in relation to stationary objects on Earth.
Further, several important kinds of...
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Significance of Displacement Current01:27

Significance of Displacement Current

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A displacement current is analogous to a real current in Ampère's law, participating in Ampère's law the same way as the usual conduction current. However, it is produced by a changing electric field. Displacement current is defined in terms of a time-varying electric field, and also has an associated displacement current density. By adding a term accounting for displacement current, Maxwell modified the existing Ampère's law, which is now called generalized Ampère's law.
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Angular Velocity and Displacement01:08

Angular Velocity and Displacement

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Uniform circular motion is motion in a circle at a constant speed. Although this is the simplest case of rotational motion, it is very useful for many situations and is used to introduce rotational variables. When a particle is moving in a circle, the coordinate system is fixed and serves as a frame of reference to define the particle’s position. Its position vector from the origin of the circle to the particle sweeps out the angle θ, which increases in the counterclockwise direction...
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Video Experimental Relacionado

Updated: Feb 14, 2026

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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Un codificador inductivo en miniatura para la medición de desplazamiento lineal

Wei Xiong1,2, Shouhao Wang1,2, Yajun Ma1,2

  • 1Beijing Institute of Precise Mechanical and Electronic Control Equipment, Beijing 100076, China.

Sensors (Basel, Switzerland)
|February 13, 2026
PubMed
Resumen

Este estudio presenta un codificador inductivo lineal miniaturizado para mediciones precisas en espacios compactos. El nuevo codificador logra alta precisión (12,8 μm) y resolución (0,7 μm) con dimensiones mínimas.

Palabras clave:
corriente de Foucaultcodificador inductivodesplazamiento linealbobinas planas

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Área de la Ciencia:

  • Ingeniería Eléctrica
  • Ingeniería Mecánica
  • Tecnología de Sensores

Sus antecedentes:

  • La medición precisa de objetos es crucial en entornos cada vez más compactos y restringidos.
  • Los codificadores lineales existentes a menudo enfrentan limitaciones de tamaño e integración en mecanismos ajustados.
  • La miniaturización de los componentes de detección es un desafío clave en la ingeniería moderna.

Objetivo del estudio:

  • Investigar y desarrollar un codificador inductivo lineal miniaturizado para la medición precisa del desplazamiento.
  • Lograr alta precisión y resolución dentro de un factor de forma compacto.
  • Permitir la integración en sistemas mecánicos altamente restringidos.

Principales métodos:

  • Diseño de un codificador inductivo lineal que integra una parte móvil con placas conductoras y una parte estacionaria con bobinas.
  • Utilización de una corriente alterna de alta frecuencia para generar un campo magnético variable en el tiempo y corrientes de Foucault.
  • Empleo del algoritmo CORDIC para el cálculo del desplazamiento a partir de señales moduladas en amplitud.

Principales resultados:

  • Se fabricó un prototipo de codificador con dimensiones de 20 mm × 10 mm × 1 mm utilizando tecnología de PCB.
  • Se logró una precisión de medición de 12,8 μm dentro de un paso y una resolución de 0,7 μm.
  • Se demostró estabilidad y precisión adecuadas para aplicaciones exigentes.

Conclusiones:

  • El codificador inductivo lineal miniaturizado es una solución viable para mediciones precisas en entornos compactos.
  • Su pequeño tamaño y alto rendimiento lo hacen adecuado para la integración en mecanismos restringidos.
  • Desarrollos posteriores podrían ampliar su aplicación en micro-robótica e instrumentación de precisión.