声学传感纤维与高度强磁带相结合,用于小规模磁场检测
Zach Dejneka1, Daniel Homa1,2, Logan Theis2
1Department of Materials Science and Engineering, Virginia Tech, Blacksburg, VA 24061, USA.
Sensors (Basel, Switzerland)
|February 13, 2025
概括
这项研究展示了一种用于磁场检测的新型光纤传感方法. 通过使用强磁性材料和纤维布拉格格 (FBG) 传感器,研究人员实现了纳米级传感度的分布式磁性表征.
科学领域:
- 材料科学 材料科学 材料科学
- 光学工程是指光学工程.
- 传感器技术 传感器技术
背景情况:
- 光纤传感为下洞和生物医学应用中磁场检测提供了潜在的潜力.
- 将强磁性材料与基于纤维的应变传感器集成,使新的磁性表征方法成为可能.
- 现有的方法可能缺乏某些应用所需的分布式和高灵敏度功能.
研究的目的:
- 为了研究磁强合金 (Metglas® 2605SC和Vitrovac® 7600 T70) 受到交流磁场的影响时的应变反应.
- 为了评估纤维布拉格格 (FBG) 声学传感器的性能,用于通过磁强应变检测磁场.
- 展示一种新的分布式光纤传感方法,用于高灵敏度磁场测量.
主要方法:
- 使用高度强磁合金 (Metglas® 2605SC和Vitrovac® 7600 T70) 作为传感元件.
- 采用纤维布拉格格 (FBG) 声学传感器来检测磁场诱导的应变.
- 采访分布式FBG传感器,使用Sentek仪器的picoDAS系统来分析传输到光纤的应变反应.
主要成果:
- 使用Vitrovac®带实现了60 nT的最小可检测磁场振幅.
- 通过Metglas®证明了卓越的灵敏度,测量场幅低至3nT.
- 确认FBG传感器不需要粘合到强磁材料以进行有效的磁场检测.
结论:
- 开发的光纤传感配置为磁性表征提供纳米级的灵敏度.
- 分布式FBG传感器在商业上可用,易于集成,并提供一种简单但有效的解决方案.
- 这种方法显示了分布式磁性测量在各种应用中的巨大潜力.
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