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探测光纤应变传感的终极极限
G Gagliardi1, M Salza, S Avino
1Consiglio Nazionale delle Ricerche-Istituto Nazionale di Ottica (INO) and European Laboratory for Non-Linear Spectroscopy (LENS), Comprensorio A. Olivetti, Via Campi Flegrei 34, I-80078 Pozzuoli (Naples), Italy. gianluca.gagliardi@ino.it
Science (New York, N.Y.)
|October 30, 2010
概括
研究人员使用纤维布拉格格振器实现了前所未有的应变测量灵敏度为10~13ε~-1/2Hz. 这一突破使光纤传感器用于基本的物理量测量.
科学领域:
- 物理 物理学 物理
- 工程 工程师 工程师 工程师
- 材料科学 材料科学 材料科学
背景情况:
- 对相对位移和变形的精确测量在各种科学和工程领域至关重要.
- 光纤传感器是应变测量的已知工具,通常达到10~9~10~6Hz~1/2Hz之间的灵敏度.
研究的目的:
- 开发一种新的光纤传感器系统,用于超敏感的应变测量.
- 为了超越当前光纤应变传感器的灵敏度极限.
主要方法:
- 使用了一种纤维布拉格格式共振器系统.
- 采用了一种二极管激光源,该激光源与石英有规律的光学频率结器相稳定.
- 取得了接近光纤热力学相位波动极限的应变测量.
主要成果:
- 证明了在10~13ε~-1/2Hz级别的应变测量.
- 这代表了应变感应灵敏度的显著进步.
结论:
- 开发的光纤传感器方案为新一代高度敏感的应变测量工具提供了一条途径.
- 潜在的应用包括先进的陀螺仪,加速度计和用于基本物理量测量的重力实验.
相关概念视频
01:27Measurements of Strain
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain gauge...
01:15Design Example: Strain Gauge Bridge or Wheatstone Bridge
The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...