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相关概念视频

Temperature Measurement Sites01:14

Temperature Measurement Sites

3.3K
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...
3.3K
Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

1.8K
Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
1.8K
Effects of Temperature on Free Energy02:11

Effects of Temperature on Free Energy

28.2K
The spontaneity of a process depends upon the temperature of the system. Phase transitions, for example, will proceed spontaneously in one direction or the other depending upon the temperature of the substance in question. Likewise, some chemical reactions can also exhibit temperature-dependent spontaneities. To illustrate this concept, the equation relating free energy change to the enthalpy and entropy changes for the process is considered:
28.2K
Body Temperature01:25

Body Temperature

4.2K
The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
4.2K
Body Temperature01:07

Body Temperature

1.4K
Body temperature reflects the equilibrium between heat production and heat loss within the body. Most heat is generated by metabolically active tissues, particularly the liver, heart, brain, kidneys, and endocrine organs. At rest, skeletal muscles contribute 20–30% of total heat production, but during vigorous exercise, this can increase up to 30–40 times.
The average body temperature is approximately 37°C (98.6°F) and typically ranges from 36.1–37.2°C...
1.4K
Temperature Dependence on Reaction Rate02:55

Temperature Dependence on Reaction Rate

88.9K
The Collision Theory
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
88.9K

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相关实验视频

Updated: Jan 29, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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一个圆柱形耐高温光纤复合传感器用于温度和压力测量.

Siwei Zhang1, Quan Liu1, Jiaqi Liu2

  • 1School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China.

Sensors (Basel, Switzerland)
|January 28, 2026
PubMed
概括

本研究介绍了一种新的光纤传感器,用于同时监测高温和压力. 混合扩展Fabry-Perot干扰仪-纤维支架格子 (EFPI-FBG) 传感器在高达600°C的恶劣环境中实现了精确的测量.

关键词:
圆柱式压力室是一个圆柱式的压力室.外在的FabryPérot干扰仪 干扰仪纤维布拉格格子格子布拉格格子格子在高温的高温环境下运行.压力 压力 压力 压力 压力

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Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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科学领域:

  • * 材料科学与工程 * 材料科学与工程
  • * 光学传感技术的应用
  • * 仪器仪表和测量 * 仪表仪表和测量 *

背景情况:

  • * 在极端条件下 (高温,高压) 需要强大的传感器.
  • * 现有传感器在恶劣的工业和研究环境中的局限性.
  • *需要同时测量温度和压力.

研究的目的:

  • * 开发和验证一种新的光纤复合材料传感器,用于同时传感温度和压力.
  • * 应对高温和高压监测的挑战.
  • * 创建一个高性能传感器,适用于恶劣的环境.

主要方法:

  • * 设计一个圆柱形传感器,集成扩展织物-佩罗特干扰仪 (EFPI) 和纤维布拉格格 (FBG).
  • *使用圆柱形压力室将压力转换为轴形变,调节EFPI腔长度.
  • *采用FBG进行温度补偿,其中一端浮动以隔离压力影响.

主要成果:

  • * EFPI腔长度和压力之间的线性关系已经证明 (灵敏度:0.171μm/MPa,R2:0.9986).
  • * 在高达600°C的温度和高达20MPa的压力下实现稳定的传感器运行.
  • *成功实现了解矩阵,用于准确的同时双参数传感.

结论:

  • * EFPI-FBG混合传感器为在恶劣环境中同时测量温度和压力提供了可行的解决方案.
  • * 传感器设计有效补偿温度干扰,确保准确的压力读数.
  • * 演示的性能验证了传感器在高性能监控应用中的潜力.