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相关概念视频

Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

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...
Measurements of Strain01:27

Measurements of Strain

Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain gauge...

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Updated: Jun 17, 2026

Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets
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一个完全可打印的应变传感器,可实现高度灵敏的无线近场审讯.

Hassan A Mahmoud1,2, Hussein Nesser1,2, Tarek M Mostafa3

  • 1Mechanical Engineering Program, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Kingdom of Saudi Arabia.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|January 21, 2025
PubMed
概括

本研究介绍了一种使用射频 (RF) 技术的新型,可打印的无线应变传感器. 这种廉价的设备为复合材料的结构健康监测提供了高灵敏度.

关键词:
没有NFC,没有NFC.这就是SHM SHM.电容应变传感器 电容应变传感器嵌入式传感器的传感器.无源射频传感器是一种被动的射频传感器.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 电气工程 电气工程
  • 机械工程 机械工程

背景情况:

  • 无线,被动和灵活的应变传感器对于先进的结构健康监测至关重要.
  • 目前的局限性包括需要有线连接和主动电源.
  • 操作简单性和适应性是无线传感器技术的关键优势.

研究的目的:

  • 开发一种全新的,完全可打印的,廉价的,并准备好使用的无线拉伸传感器.
  • 为了利用无线电频率 (RF) 技术进行被动的,无线的应变测量.
  • 为了证明传感器在监测复合结构中的有效性.

主要方法:

  • 使用射频技术和丝网印刷制造一个无线传感器.
  • 压电阻电极与电容传感器的集成,以提高灵敏度.
  • 使用近场通信 (NFC) 标签与电感器-电容器 (LC) 共振电路.
  • 测试传感器在玻璃纤维增强聚合物 (GFRP) 样本上测量应变时的性能.

主要成果:

  • 传感器在电容模式下,在5%以下的压力下,在20 MHz达到≈16的高度因子 (GF).
  • 无线应变监测显示了显著的共振频率转移 (GF ≈2.2).
  • 在GFRP曲测试期间无线监测应变时观察到出色的性能.

结论:

  • 开发的传感器是结构健康监测的成本效益高,适应性强的解决方案.
  • 该技术显示了嵌入式传感在各种复合结构中的巨大潜力.
  • 这项工作为关键基础设施的先进,非侵入性监测铺平了道路.