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相关概念视频

Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

520
The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
520

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相关实验视频

Updated: May 10, 2025

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
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长距离和无死区的双测距,用于移动目标的干涉测距跟踪.

Sandro L Camenzind1, Lukas Lang1, Benjamin Willenberg1

  • 1Department of Physics, Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland.

ACS photonics
|April 21, 2025
PubMed
概括

双测距提供无死区,高精度的距离测量,最高可达40米. 这种方法使用GPU加速算法和专用激光进行实时跟踪,精度达到纳米级.

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科学领域:

  • 光学计量学是指光学计量学.
  • 激光物理学的激光物理学
  • 精确度测量测量的精确度

背景情况:

  • 双测距是精确,远距离测量的关键技术.
  • 现有的方法在速度,准确性和死亡区域方面面临限制.

研究的目的:

  • 为了展示一个无死区的双测距方法,用于远距离计量.
  • 为了实现高精度的移动目标的实时跟踪.

主要方法:

  • 使用了一个自由空间收发器单元与一个自由运行的双激光器 (λc ≈ 1055 nm,1 GHz PRR).
  • 实现了图形处理单元 (GPU) 加速算法,用于实时信号处理.
  • 采用可互换的轮用于同时进行远距离测量.

主要成果:

  • 在40米以上的距离上,单次射击飞行时间精度达到了0.1μm.
  • 使用相位信息进行干扰度测量,提高了单次射击精度至<20nm.
  • 与参考干扰仪相比,在40米的目标运动中,与残留量<3μm的测距精度得到证明.

结论:

  • 开发的双测距方法可以实现准确的,无死区的远距离测量.
  • 该系统支持以纳米级精度实时跟踪移动目标.
  • 这项技术对先进的计量学应用具有重大潜力.