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相关概念视频

IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

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IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
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Temperature Measurement Sites01:14

Temperature Measurement Sites

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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
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相关实验视频

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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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基于FMCW干涉度和DSP算法的多点温度的灵敏检测

Chengyu Mo1, Yuqiang Yang1,2, Xiaoguang Mu1,2

  • 1Research Center of Guangdong Smart Oceans Sensor Networks and Equipment Engineering, Guangdong Ocean University, Zhanjiang 524088, China.

Nanomaterials (Basel, Switzerland)
|October 28, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的海水温度检测系统,使用虚拟的维尼尔效应与多重的法布里-佩罗腔和光学FMCW干扰度. 这种方法提高了灵敏度和空间分辨率,用于精确的海洋监测.

关键词:
频率调制连续波的频率调制.干扰测量的干扰测量.调制功能的调制功能光纤传感技术是一种光纤传感技术.虚拟的弗尼耶效应

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相关实验视频

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科学领域:

  • 光电学是指光电子产品.
  • 光纤传感传感器是指光纤传感器.
  • 海洋技术 海洋技术

背景情况:

  • 准确的海水温度监测对于海洋学研究和气候研究至关重要.
  • 传统的光纤传感系统在复杂化,空间定位和灵敏度放大方面面临着挑战.
  • 现有的增强传感器灵敏度的方法往往需要复杂的物理配置.

研究的目的:

  • 开发一种高灵敏度的多点海水温度检测系统.
  • 为了克服光学频率调制连续波 (FMCW) 系统中非线性频率扫描的局限性.
  • 为加强海洋环境监测提供准分布式光学传感.

主要方法:

  • 使用光学FMCW干扰度的多重Fabry-Perot (FP) 腔.
  • 实施了一个软件补偿方法来解决非线性频率扫描.
  • 采用数字信号处理 (DSP) 和光谱解调来计算实现虚拟的维尼尔效应.

主要成果:

  • 实现了82.3米的光纤连接,空间分辨率为23.9微米.
  • 证明了放大温度的灵敏度,范围从 -269.78 pm/°C到 -280.67 pm/°C.
  • 与单个传感器相比,获得了3.32,4.93和6.13的灵敏度放大因子.

结论:

  • 通过计算实现的虚拟维尼尔效应消除了对物理参考数组的需求.
  • 该系统有效地实现了多重复合,空间定位和从多个光纤传感器发出的弱信号的放大.
  • 这项技术在海洋环境中提供了高精度,准分布式光学传感的巨大潜力.