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相关概念视频

Wheatstone Bridge01:29

Wheatstone Bridge

468
An ohmmeter is a resistance-measuring device. It works by applying a voltage to a resistor of unknown resistance and measuring the current across the resistor. The resistance value is deduced using Ohm's law. Usually, the standard configuration of an ohmmeter comprises a voltmeter or an ammeter. However, such configurations are limited in accuracy because the meters alter the voltage applied to the resistor and the current that flows through it.
Thus, for accurate resistance measurements, a...
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The Hall Effect01:30

The Hall Effect

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Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.
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Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

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The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
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基于道效应磁阻传感器的瓦米表.

S Soriano-Díaz1, D Ramírez-Muñoz1, R García-Gil1

  • 1Department of Electronic Engineering, University of Valencia, Avda. de la Universitat, s/n, 46100 Burjassot, Spain.

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概括

磁道连接 (MTJ) 技术为电流和功率处理提供了具有竞争力的传感解决方案. 这项研究详细介绍了一台TMR Wheatstone桥梁传感器,展示了其性能和集成到电子瓦特表中的功能.

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科学领域:

  • 电气工程 电气工程
  • 材料科学 材料科学 材料科学
  • 传感器技术 传感器技术

背景情况:

  • 磁道连接 (MTJ) 技术提供了独特的磁阻性能.
  • 传统的电流和功率传感方法在精度和隔离方面存在局限性.
  • 惠特斯通桥梁拓是用于敏感测量的常见配置.

研究的目的:

  • 评估道效应磁阻 (TMR) 技术用于电流和功率传感的可行性.
  • 为了描述基于TMR的Wheatstone桥梁传感器的电气和热性能.
  • 开发和验证使用TMR传感技术的电子瓦米表.

主要方法:

  • 使用多层磁道连接元件堆叠的TMR传感器的制造.
  • 在使用气候室和专用仪器的情况下,在直流和交流电流条件下对传感器性能进行表征.
  • 开发一种电子瓦特计电路,将TMR桥与模拟处理器进行接口.

主要成果:

  • TMR传感器的电流灵敏度为0.324 mV/A,具有特定的热漂移系数.
  • 传感器展示了准确的交流电流测量高达10 Arms.
  • 开发的电子瓦特表在1.5千瓦负载下实现了功率和电流测量的不到1%的偏差.

结论:

  • TMR技术为电流和功率处理器提供了一种可行且具有竞争力的传感方法.
  • 具有特色的TMR Wheatstone桥梁传感器在不同温度下提供稳定的性能.
  • 集成的电子瓦米表展示了TMR传感器的实际应用,用于准确的功率监测与高压隔离.