| 99 | 0 | 75 |
| 下载次数 | 被引频次 | 阅读次数 |
针对锅炉受热面管温度检测的技术难题，本文提出了一种基于光纤布拉格光栅(FBG)热光效应与热膨胀效应的分布式温度传感器。通过在同一通道上合理布置不同中心波长的光栅多波长FBG单通道复用技术实现空间测温，同时设计光纤铠装与管壁耦合装置以消除应力干扰的测温精度的影响；采用栅区镀金工艺提升传感器线性度，并通过涂抹高温硅脂增强FBG与管壁的瞬态热传导。实验结果表明，未镀金FBG的全量程灵敏度为14.6×10-12 m/℃，R2=0.978 4，而栅区镀金后传感器线性度提高，在300～720℃范围内灵敏度达15.6×10-12 m/℃，R2=0.999 7；通过四组升-降温实验验证了传感器输出重复性，结果显示其最大偏差仅为全量程的4%。在电厂锅炉现场实际应用中，与热电偶传感器对比测试，验证了该FBG传感器的可靠性，其测温性能与热电偶相当，同时兼具布线简单、成本低的优势。
Abstract：To address the challenge of temperature detection in boiler heating surface tubes,this article proposes a distributed temperature sensor based on the combined thermo-optic and thermal expansion effects of fiber Bragg gratings(FBGs).Spatial temperature measurement is achieved by implementing multi-wavelength FBG single-channel multiplexing within the same optical fiber channel,through rationally arranging FBGs with distinct central wavelengths.An armored fiber and tube-wall coupling device is designed to eliminate stress-induced interference.The linearity of the sensor is enhanced through gold plating of the FBG grating regions.At the same time,transient thermal conduction between the FBG and the tube wall is improved by applying high-temperature silicone grease.Experimental results demonstrate that the unplated FBG exhibited a full-range sensitivity of 14.6×10-12 m/℃ with R2=0.978 4.Following gold plating,the sensor′s linearity improved significantly,achieving a sensitivity of 15.6 × 10-12 m/℃ and R2=0.999 7 in the 300～720 ℃ range.Four sets of heating-cooling cycle experiments confirmed the sensor′s output repeatability,with a maximum deviation of 4% of the full scale.In practical field applications on a power plant boiler,comparative testing against thermocouple sensors validated the reliability of the FBG sensor.Its temperature measurement performance was found to be comparable to that of thermocouples,while also offering the advantages of simplified cabling and lower cost.
[1] JO J H,PARK D Y,KIM K W,et al.Real-time monitoring of concrete curing using fiber Bragg grating sensors:Strain and temperature measurement[J].Sensors and Actuators A:Physical,2023,362:114650.DOI:10.1016/j.sna.2023.114650.
[2] WANG Xingyu,SUN Xiaoyan,HU Youwang,et al.Multilayer metal-coated fiber Bragg grating for high-temperature sensing[J].Measurement,2024,226:114132.DOI:10.1016/j.measurement.2024.114132.
[3] NAUMANN C,CARLESI T,OTTO H,et al.Dynamic characterization of Fiber Bragg Grating temperature sensors[J].Experimental Thermal and Fluid Science,2024,156:111222.DOI:10.1016/j.expthermflusci.2024.111222.
[4]王雅莉，徒芸，涂善东，等．基于光纤光栅传感器温度补偿的低温应变测量方法研究[J]．仪表技术与传感器，2023(6):26-33.
[5]韩国庆，刘显明，雷小华，等．光纤传感技术在航空发动机温度测试中的应用[J]．仪器仪表学报，2022,43(1):145-164.
[6]赵勇，赵健，吕日清，等．基于无芯光纤与光栅级联的反射式大量程高分辨力海水温度传感器[J]．仪器仪表学报，2022,43(3):178-185.
[7]姚建南，刘志成，钟年丙，等．液位-液压-温度同时检测光纤隔膜传感器[J]．仪器仪表学报，2023,44(2):146-153.
[8]程嘉慧，傅海威，陈苗，等．基于弱反射光纤光栅的温度传感解调系统[J]．光通信研究，2025(3):78-83.
[9]王献，伊重瑾，杨勇．基于分布式光纤光栅碳纤维复合材料的飞机火警定位[J]．武汉理工大学学报（信息与管理工程版），2023,45(6):862-867.
[10]许童杰，刘振华，蒋秀丽，等．不锈钢管封装短周期光纤光栅温度传感器特性及仿真分析[J]．微纳电子技术，2023,60(9):1457-1463.
[11]李驰，鲁志琪，任杰，等．基于飞秒激光直写的高折射率光纤光栅传感器[J]．压电与声光，2023,45(3):445-449.
[12]LEAL-JUNIOR A,SILVEIRA M,MARQUES C.A comparison of temperature compensation methods in a diaphragmembedded FBG[J].Results in Optics,2024,14:100618.DOI:10.1016/j.rio.2024.100618.
[13]REN Yunhao,SONG Han,CAI Qihui,et al.Modeling analysis and experimental study on epoxy packaged FBG sensor for cryogenic temperature measurement[J].Optical Fiber Technology,2024,84:103710.DOI:10.1016/j.yofte.2024.103710.
[14]HUANG Shuwei,ZHANG Junjie,KE Yannan,et al.In-situ monitoring of carbon fiber/epoxy composite with FBG sensors under curing and thermal cycling conditions[J].Composites Communications,2024,47:101875.DOI:10.1016/j.coco.2024.101875.
[15]ZHU Siqi,LIU Mingyao,SONG Han,et al.An integrated Dual-Parameter sensor based on FBG for Temperature/Pressure monitoring of fluid pipeline[J].Optical Fiber Technology,2024,84:103694.DOI:10.1016/j.yofte.2024.103694.
[16]WANG Hongye,FAN Siyun,MENG Lingzhi,et al.Multi-parameter sensor based on cascaded multicore FBGs and an FPI for bending,temperature and pressure measurements[J].Optics&Laser Technology,2024,175:110782.DOI:10.1016/j.optlastec.2024.110782.
[17]LIANG Zhihong,MA Yunlong,LIU Debo,et al.An adaptive post-processing algorithm for strain reading abnormalities of FBG in cryogenic test[J].Measurement,2024,227:114248.DOI:10.1016/j.measurement.2024.114248.
[18]董西英，马刚领．磁控溅射淀积速率影响因素及最佳工艺参数研究[J]．无线互联科技，2010(4):36-38,43.
基本信息:
DOI：10.16191/j.cnki.hbkx.2025.05.001
中图分类号:TM621.2
引用信息:
[1]郑相锋,李长华,张硕,等.基于光纤光栅的燃煤电厂锅炉温度传感研究[J].河北省科学院学报,2025,42(05):7-12.DOI:10.16191/j.cnki.hbkx.2025.05.001.
基金信息:
国家重点研发计划项目（2023YFB4102902）; 电科院科研计划项目（GJ2023Y01）
