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A Shadow-Based Nano Scale Precision Force Sensor

机译：基于阴影的纳米级精密力传感器

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摘要

The meniscus surrounding a hydrophobic circular plate floating on a transparent liquid surface could refract light to form a shadow with a bright edge at the bottom of the vessel. This paper demonstrated the feasibility of a simple method to visually measure the force applied on the top surface of this circular plate by using its shadow image. The shadow area represented the floating force according to the updated Archimedes' principle. The viscous damping of liquid could reduce the high-frequency noises from the environmental vibration, which improved the stability and sensitivity of the measuring system. The water depth, initial weight of the plate, and the size of the circular plate effects on the shadows and the edge quality have been evaluated. With an ordinary camera to monitor the shadow, a simple circular plate device could realize a force resolution of up to 10 nN. The force measuring range and sensitivity can be easily extended by changing the radius of the circular plate. The shadow method could be developed into a novel nano scale precision force measurement apparatus.
机译：漂浮在透明液体表面上的疏水性圆形板周围的弯液面可能会折射光，从而在容器底部形成阴影，并在边缘带有明亮的边缘。本文展示了一种简单方法的可行性，该方法可以通过使用其阴影图像直观地测量施加在此圆形板顶面上的力。阴影区域表示根据更新的阿基米德原理的浮动力。液体的粘性阻尼可以减少环境振动产生的高频噪声，从而提高了测量系统的稳定性和灵敏度。已经评估了水深，板的初始重量以及圆形板的尺寸对阴影和边缘质量的影响。使用普通的摄像机监控阴影，简单的圆盘装置可以实现高达10 nN的力分辨率。通过改变圆板的半径，可以轻松扩展测力范围和灵敏度。阴影法可以发展成为一种新型的纳米级精密力测量装置。

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  • 来源
    《IEEE sensors journal》 |2019年第6期|2072-2078|共7页
  • 作者

    Lu Hongyu; Zheng Yelong; Jiang Jile; Yin Wei; Meng Yonggang; Tian Yu;

  • 作者单位

    Tsinghua Univ, Dept Mech Engn, State Key Lab Tribol, Beijing 100084, Peoples R China;

    Tianjin Univ, State Key Lab Precis Measuring Techol & Instrumen, Tianjin 300072, Peoples R China;

    Natl Inst Metrol, Div Mech & Acoust, Beijing 100029, Peoples R China;

    Tsinghua Univ, Tianjin Res Inst Adv Equipment, Lubricat & Frict Testing Ctr, Tianjin 300300, Peoples R China;

    Tsinghua Univ, Dept Mech Engn, State Key Lab Tribol, Beijing 100084, Peoples R China;

    Tsinghua Univ, Dept Mech Engn, State Key Lab Tribol, Beijing 100084, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biomimetic; hydrophobic; force sensitive; shadow method;

    机译：仿生;疏水;力敏感;阴影法;

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