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相关概念视频

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

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Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
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相关实验视频

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基于光学频域反射计的分布式温度传感,使用雷利反射扩散增强纤维.

Ziyi Lu1,2, Ting Feng1,2, Fang Li1,2

  • 1Photonics Information Innovation Center, College of Physics Science & Technology, Hebei University, Baoding 071002, China.

Sensors (Basel, Switzerland)
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概括

一种新的光学频域反射计 (OFDR) 方法使用增强的光纤来精确传感温度. 这种技术通过分析纤维沿线高回散点的变化来准确测量温度变化.

关键词:
雷利反向散射增强纤维增强纤维分布式光纤传感器是分布式光纤传感器.光学频域反射计是指光学频域反射计.温度测量温度测量的测量

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科学领域:

  • 光子学和光学传感器
  • 材料科学 材料科学 材料科学
  • 计量学 计量学 计量学

背景情况:

  • 分布式温度传感 (DTS) 对于监控基础设施和工业流程至关重要.
  • 传统的DTS方法在空间分辨率和精度方面存在局限性.
  • 光学频域反射计 (OFDR) 提供高分辨率,但需要专门的传感元件.

研究的目的:

  • 开发一种基于OFDR的创新分布式温度传感方法.
  • 使用一种新的雷利反射增强纤维 (RBEF) 作为传感介质.
  • 为了实现准确和高分辨率的温度调节.

主要方法:

  • 采用雷利反射增强纤维 (RBEF),具有明显的高反射点.
  • 使用滑动交叉相关性方法来分析反向散射点位置的变化.
  • 校准反向散射点位置变化和温度变化之间的关系,以实现调节.

主要成果:

  • 证明了温度变化与高回散点的移位之间的线性关系.
  • 达到7.814微米/m·°C的温度感应灵敏系数.
  • 报告平均相对温度误差为-1.12%,定位误差低至0.02米.

结论:

  • 拟议的OFDR方法与RBEF可实现准确的分布式温度传感.
  • 空间分辨率取决于高回散点的分布.
  • 高温传感分辨率 (0.418°C/m) 可以通过12.5μm的OFDR系统分辨率实现.