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相关概念视频

Measurements of Strain01:27

Measurements of Strain

704
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...
704
Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

393
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...
393

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相关实验视频

Updated: Jun 24, 2025

Production of a Strain-Measuring Device with an Improved 3D Printer
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超敏感的光机械应变传感器

Qiang Zhang, Simin Du, Shiwei Yang

    Optics express
    |June 11, 2024
    PubMed
    概括
    此摘要是机器生成的。

    我们开发了一种超敏感的光机械应变传感器,使用化 (SiN) 膜和Fabry-Perot腔. 这种传感器可以实现高分辨率的静态和动态应变测量,无需复杂的设备.

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    相关实验视频

    Last Updated: Jun 24, 2025

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    Published on: January 30, 2020

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    Fabrication and Testing of Microfluidic Optomechanical Oscillators
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    科学领域:

    • 视觉机械学 视觉机械学
    • 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:

    • 应变传感器对于各种应用至关重要,但达到高灵敏度往往需要复杂而昂贵的设置.
    • 现有的超敏感应变传感器通常依赖于窄线宽激光器和高精度腔与频率锁定设备,限制其实际使用.

    研究的目的:

    • 为了展示一种超敏感的光机械应变传感器,具有高静态和动态应变分辨率.
    • 克服现有传感器的局限性,避免需要窄线宽激光器和具有频率锁定设备的高精度腔.

    主要方法:

    • 使用化 (SiN) 膜,具有高质量的机械共振因子.
    • 采用双光束法布里-佩罗洞穴来探测SiN膜的运动.
    • 监测反射光的波动,使用单频激光来测量应变.

    主要成果:

    • 通过测量机械共振频率转移,获得了4.00 nɛ的静态应变分辨率.
    • 获得的动态应变分辨率为4.47pHz-1/2.
    • 已证明的性能与使用高精度腔和光学频率的传感器相当,但要求更简单.

    结论:

    • 开发的基于SiN膜的光机械传感器提供了一个有前途的新一代超敏感应变测量.
    • 这项技术克服了当前超敏感应变传感器的关键局限性,为更广泛的应用铺平了道路.
    • 传感器使用单频激光器高分辨率测量静态和动态应变的能力是一个重大进步.