通过网络分析进行分布式温度传感 频域反射计
Rizwan Zahoor1, Raffaele Vallifuoco1, Luigi Zeni1
1Department of Engineering, Università della Campania Luigi Vanvitelli, Via Roma 29, 81031 Aversa, Italy.
Sensors (Basel, Switzerland)
|April 13, 2024
概括
我们开发了一种网络分析光频域反射仪 (NA-OFDR),用于精确的分布式温度传感. 这种新方法可以实现高空间和温度分辨率,而不需要可调节激光.
科学领域:
- 光学工程是指光学工程.
- 传感技术 传感技术
- 计量学 计量学 计量学
背景情况:
- 分布式温度传感 (DTS) 对于监控基础设施和环境至关重要.
- 传统的光频域反射计 (OFDR) 由于可调节激光器的要求而面临限制,这影响了连贯性和扫描线性.
- 高分辨率的温度测量在各种科学和工业应用中至关重要.
研究的目的:
- 提出和演示一种新的网络分析光频域反射仪 (NA-OFDR),用于增强分布式温度测量.
- 为了实现高空间分辨率 (低至≈3厘米) 和高温度分辨率 (≈50mK).
- 通过消除对可调节激光器的需求,克服传统OFDR的局限性.
主要方法:
- 使用一个频率分级,连续波 (cw) 激光.
- 使用矢量网络分析器对雷利反散射信号的光调制和解调制.
- 雷利反射光与局部振荡器的一致混合.
- 分析两个配置:双侧带和单侧带调制探头光.
主要成果:
- 证明了具有高空间分辨率 (≈3厘米) 的分布式温度测量.
- 由于连贯雷利散射的灵敏度,获得了高温分辨率 (≈50mK).
- 通过数值模拟和实验测试验证了NA-OFDR方法.
- 证实了系统对激光连贯性和扫描非线性问题的稳定性.
结论:
- 拟议的网络分析光频域反射仪 (NA-OFDR) 为高分辨率分布式温度传感提供了一个有前途的替代方案.
- 该系统的设计克服了传统OFDR的关键局限性,提高了可靠性和性能.
- 在苛刻的环境中,NA-OFDR提供了一个通用的平台,用于精确的温度监测.
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