摘要
带式输送机沿线温度快速精准测定在煤矿外因火灾预防中起核心作用。基于光时域反射(OTDR)的分布式光纤测温是目前主流的带式输送机沿线测温技术,但存在测温精度不足、定位误差较大等问题。针对该问题,提出了一种基于光频域反射(OFDR)的带式输送机全域智能精准测温系统,通过分析系统技术路线和架构,确定以拉曼散射为理论基础、快速傅里叶变换为信号处理算法,选择可调谐半导体激光器,设计了4层复合结构的OFDR光缆,直径为4 mm,较传统OTDR光缆减小50%,最大拉伸强度提高33%,最大抗压强度提升233%。在山西高和能源有限公司南翼一部带式输送机沿线开展工业性试验,结果表明,该系统在1 a内运行稳定,系统巡检周期为12.5 s,测温准确度为0.5℃,定位准确度为0.25 m,均满足NB/T 10183—2019《矿用分布式光纤测温装置》要求且优于目前行业较高水平,同时能够可靠实现温度超限、温升速率、温差报警功能。
Rapid and precise measurement of temperature along the belt conveyor plays a core role in preventing external fire hazards in coal mines.Distributed optical fiber temperature measurement based on Optical Time-Domain Reflectometry(OTDR)is currently the mainstream technology for temperature measurement along belt conveyors,but it suffers from low temperature measurement accuracy and large positioning errors.To address this issue,an Optical Frequency Domain Reflectometry(OFDR)-based full-area intelligent and precise temperature measurement system for belt conveyors was proposed.By analyzing the system's technical route and architecture,Raman scattering was determined as the theoretical basis,fast Fourier transform as the signal processing algorithm,and a tunable semiconductor laser was selected.A four-layer composite-structured OFDR optical cable with a diameter of 4 mm was designed,with the diameter reduced by 50%compared with traditional OTDR optical cables,the maximum tensile strength increased by 33%,and the maximum compressive strength improved by 233%.An industrial test was carried out along the No.1 South Wing belt conveyor of Shanxi Gaohe Energy Co.,Ltd.The results showed that the system operated stably for one year,with a system inspection cycle of 12.5 s,a temperature measurement accuracy of 0.5℃,and a positioning accuracy of 0.25 m,all meeting the requirements of NB/T 10183—2019 Distributed Optical Fiber Temperature Measuring Device for Mine and surpassing the current advanced industry level.At the same time,the system reliably provided alarm functions for temperature over-limit,temperature rise,and temperature difference.
作者
任保将
唐民
杜锋
富佳兴
高贵恒
崔明
王志浩
REN Baojiang;TANG Min;DU Feng;FU Jiaxing;GAO Guiheng;CUI Ming;WANG Zhihao(Shanxi Gaohe Energy Co.,Ltd.,Changzhi 470100,China;Shandong Liuos Electronic Technology Co.,Ltd.,Taian 101399,China;School of Energy and Mining Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;Chinese Institute of Coal Science,Beijing 100013,China;Tiandi Technology Co.,Ltd.,Beijing 100013,China;China Coal Technology and Engineering Group Co.,Ltd.,Beijing 100013,China)
出处
《工矿自动化》
北大核心
2025年第8期15-24,共10页
Journal of Mine Automation
基金
国家自然科学基金青年科学基金项目(52304170)
中国煤炭科工集团有限公司科技创新创业资金专项项目(2022-2-MS001)。
关键词
带式输送机
输送带沿线测温
光纤测温
光时域反射
光频域反射
OFDR
OTDR
belt conveyor
conveyor belt temperature measurement
optical fiber temperature measurement
Optical Time-Domain Reflectometry
Optical Frequency Domain Reflectometry
OFDR
OTDR
