基于多峰高斯拟合的分布式拉曼测温系统设计与应用

张均; 杜超; 于昌智; 张丽; 邓霄

doi:10.5768/JAO202344.0103003

基于多峰高斯拟合的分布式拉曼测温系统设计与应用

doi: 10.5768/JAO202344.0103003

张均^1,,
杜超¹,
于昌智¹,
张丽¹,
邓霄^{1, 2, ,}

1.
太原理工大学物理与光电工程学院，太原 030024
2.
太原理工大学新型传感器与智能控制教育部与山西省重点实验室，太原 030024

基金项目: 国家自然科学基金（52009088）；山西省重点研发计划资助项目（201903D321001）；山西省应用基础研究计划（201901D211073）

详细信息

作者简介:
张均（1996—），女，硕士研究生，主要从事分布式光纤传感技术方面的研究。E-mail：1782941520@qq.com

通讯作者:
邓霄（1980—），男，博士，教授，主要从事冰情检测与光电智能仪器方面的研究。E-mail：dengxiao@tyut.edu.cn

中图分类号: TN206
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出版历程
- 收稿日期: 2022-03-16
- 修回日期: 2022-08-26
- 网络出版日期: 2022-09-08
- 刊出日期: 2023-01-17

Design and application of distributed Raman thermometry system based on multi-modal Gaussian fitting

ZHANG Jun^1
,,
DU Chao¹,
YU Changzhi¹,
ZHANG Li¹,
DENG Xiao^{1, 2
, ,}

1.
College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China
2.
Key Laboratory of Advanced Transducers and Intelligent Control System (Ministry of Education), Taiyuan University of Technology, Taiyuan 030024, China

摘要

摘要: 针对温感区域长度小于空间分辨率导致温度测量不准确的问题，提出一种多点温度校正方案，并介绍了一种可应用于中小尺度剖面温度分布测量的装置和方法。采用基于多峰高斯拟合的方案，实现了多个测量不准确温度点的同时校正，提高了系统的温度准确度，设计了分布式拉曼测温系统样机，通过将光纤部分缠绕在PPR管上实现了中小尺度剖面温度分布测量。实验装置使2 m和1.5 m温感区域的测量准确度提高到1 ℃；测得冬季黄河万家寨水库冰盖厚度约为42.33 cm，与人工测量结果相差约为1.67 cm；测得36 m深河水剖面的温度约在0.32 ℃～0.90 ℃范围内波动。实验结果表明，采用该分布式拉曼测温系统能够在野外大范围监测河道流水剖面的温度分布。
- 分布式拉曼 /
- 多点温度校正方案 /
- 冰盖剖面温度 /
- 河水剖面温度
Abstract: Aiming at the problem that the length of the temperature sensing area is smaller than the spatial resolution, which leads to inaccurate temperature measurement, a multi-point temperature correction scheme was proposed, and a device and method that could be applied to the measurement of temperature distribution in medium and small scale sections were introduced. Using the scheme based on multi-modal Gaussian fitting, the simultaneous correction of multiple inaccurate temperature points was realized, and the temperature accuracy of the system was improved. A prototype of the distributed Raman thermometry system was designed, and the measurement of temperature distribution in medium and small scale sections was realized by wrapping the fiber around the PPR tube. The experimental device improved the measurement accuracy of 2 m and 1.5 m temperature sensing areas to 1 °C, the thickness of the ice sheet of the Wanjiazhai Reservoir on the Yellow River in winter was measured to be 42.33 cm, which was 1.67 cm different from the artificial measurement results, and the measured temperature of 36 m deep river water profile fluctuated in the range of 0.32 ℃ ~ 0.90 ℃. The experimental results show that the distributed Raman thermometry system can monitor the temperature distribution of the river flow profile on a large scale in the field.
- distributed Raman /
- multi-point temperature correction scheme /
- ice sheet profile temperature /
- river profile temperature

HTML全文

图 1 分布式拉曼测温系统总体设计

Fig. 1 Overall design of distributed Raman thermometry system

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图 2 标准温度与光纤测量温度之间的线性关系

Fig. 2 Linear relationship between standard temperature and fiber-measured temperature

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图 3 高斯拟合处理前后的温度分布

Fig. 3 Temperature distribution before and after Gaussian fitting

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图 4 校正前后的温度分布

Fig. 4 Temperature distribution before and after correction

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图 5 冰盖剖面温度传感器

Fig. 5 Temperature sensor of ice sheet profile

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图 6 传感器的布设与数据采集

Fig. 6 Sensor layout and data collection

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图 7 正在冻结和冻结完成的温度数据

Fig. 7 Freezing and frozen temperature data

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图 8 冰盖垂直方向上的温度分布

Fig. 8 Temperature distribution in vertical direction of ice sheet

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图 9 人工测量的新冰盖厚度

Fig. 9 New ice sheet thickness by manual measurement

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图 10 河水垂直方向上的温度分布

Fig. 10 Temperature distribution in vertical direction of river water

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