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相关概念视频

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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Electronic Distance Measuring Instruments01:30

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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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相关实验视频

Updated: Jan 8, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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70公里远程的拉曼分布式光纤传感通过增强的反扭曲编码和波形重建来进行光纤传感.

Fan Zhang1,2, Jian Li3,4,5, Lulei Li1,2

  • 1College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, China.

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|December 15, 2025
PubMed
概括

这项研究增强了拉曼分布式光纤传感,用于远程应用. 通过结合先进的信号处理技术,它实现了高精度的70公里传感范围,克服了以前的限制.

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Last Updated: Jan 8, 2026

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 传感技术 传感技术
  • 信号处理 信号处理

背景情况:

  • 拉曼分布式光纤传感在30公里以上的距离上受到低信号噪声比 (SNR) 的限制.
  • 这种限制阻碍了长距离基础设施和环境监测的实际实施.

研究的目的:

  • 为了克服拉曼分布式光纤传感的距离限制.
  • 通过先进的信号处理技术来提高传感性能.

主要方法:

  • 一个新的预处理框架,结合了增强的反扭曲编码,拉曼散射波形重建和Haar波形无声化.
  • 优化互补序列的相关性,以减轻短暂的影响.
  • 波形重建的协同应用,编码增益和波形消音.

主要成果:

  • 实现了70.0公里的传感距离,空间分辨率为1.58米.
  • 保持了0.91°C的测量精度和5.39°C的温度分辨率.
  • 成功地打破了SNR和传感距离之间的理论权衡.

结论:

  • 拟议的三方协同机制显著提高了拉曼分布式光纤传感能力.
  • 这种方法为远程基础设施监控和环境传感应用提供了可行的解决方案.
  • 该方法通过改善SNR和减轻信号扭曲,超越了物理限制.