概括
这项研究引入了一种全纤维的长距离应变传感系统. 它实现了高灵敏度的测量应变变化,使得应用程序,如声学记录在扩展光纤网络.
科学领域:
- 光纤传感传感器是指光纤传感器.
- 光子学 是一个光子学.
- 激光系统 激光系统
背景情况:
- 传统的应变传感方法在范围和灵敏度方面存在局限性.
- 分布式光纤传感为远距离测量提供了潜力.
- 声噪声会降低光纤传感器的性能.
研究的目的:
- 开发一个被动的,全纤维的延伸范围的应变传感系统.
- 为了实现高灵敏度和广泛的频率响应,用于应变测量.
- 为了证明使用光纤应变传感器进行远距离声学记录的可行性.
主要方法:
- 使用锁定在 π 转移格子上的二极管激光来稳定频率.
- 从激光的反信号中提取应变测量,以最大限度地减少声噪声.
- 测量应变变化使用强化回归光的强度,用于更高的频率.
主要成果:
- 在75公里的光纤电缆上演示了应变传感.
- 在10 Hz时达到23 nɛ的最小可检测应变,灵敏度为5.27 mV/μɛ.
- 测量了从直流到100kHz的应变变化,使声学记录成为可能.
结论:
- 开发的系统为被动,远程光纤应变传感提供了一种新的方法.
- 该系统的灵敏度和频率范围支持超越传统菌株监测的应用.
- 这项技术可以通过光纤在非常远的距离上进行高保真声学和音乐录音.
相关概念视频
01:27Measurements of Strain
2.1K
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...
2.1K
01:15Design Example: Strain Gauge Bridge or Wheatstone Bridge
526
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...
526