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Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

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Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
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Updated: May 6, 2026

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
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在中空触觉中使用多面体反射器进行远程小点呈现.

Kentaro Ariga1, Atsushi Matsubayashi2, Yasutoshi Makino2

  • 1Graduate School of Information Science and Technology, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, Japan.

The Journal of the Acoustical Society of America
|May 30, 2024
PubMed
概括

这项研究探讨了使用平面表面来接近空中触觉的形反射器. 这项研究建立了一个融合条件,以创建一个单一的焦点与超声波相位阵列.

科学领域:

  • 声学 声学 在声学方面
  • 触觉学是指触觉学是指触觉学.
  • 波浪物理学的波浪物理.

背景情况:

  • 超声波分相阵列为空中触觉提供了高度的时空控制.
  • 形反射器可以扩展相位数组的焦距范围.
  • 理想的形表面会给制造和整合带来挑战.

研究的目的:

  • 为了数值地研究一个近似的形反射器的多平面表面的收.
  • 通过使用具有相位阵列的近似反射器来推导实现单个焦点的条件.
  • 通过模拟和实验验证得出的趋同标准.

主要方法:

  • 通过多个平面段作为反射器进行近似的表面的数值检查.
  • 根据反射器精度和相位阵列大小推导单点收条件.
  • 通过数值模拟进行验证,并使用多面体反射器进行实验验证.

主要成果:

  • 导出了一个单点收条件,将反射器精度和相位阵列尺寸联系起来.
  • 接近的反射器可以形成一个单一的焦点,如果符合收条件.
  • 数字模拟证实了收方程,显示了对分段大小偏差的5%容忍度.
  • 实验结果表明,使用多面反射器和相位移控制,形成了一个小的焦点.

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结论:

  • 接近理想的形反射器与多个平面段是可行的中空触觉.
  • 由此衍生出的收条件准确地预测了形成单一焦点的能力.
  • 这种方法为增强超声相阵列在触觉应用中的焦点能力提供了一种实用方法.