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基于数字孪生的矿山散料堆场堆取料机智能监测系统

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金属矿山 2024年第1期 132-138页

作者：刘燕燕赵峰付博宣杨晓明齐跃峰燕山大学信息科学与工程学院河北秦皇岛066000 河北省特种光纤和光纤传感器重点实验室河北秦皇岛066000

在许多涉及散料装卸作业的大型储料场中,斗轮堆取料机被视为当前最为理想的大型可连续作业机械,为了延长其使用寿命,降低维修成本并解决人工巡检不便的问题,提出了一种基于五维数字孪生的智能健康监测系统。通过机身外部布设光纤光栅传... 详细信息

在许多涉及散料装卸作业的大型储料场中,斗轮堆取料机被视为当前最为理想的大型可连续作业机械,为了延长其使用寿命,降低维修成本并解决人工巡检不便的问题,提出了一种基于五维数字孪生的智能健康监测系统。通过机身外部布设光纤光栅传感器以及内置电机实时运转数据获取堆取料机的当前工作状态,并将数据传入内部信息交互通信网络进行数据的分离存储与融合处理,在消除双光栅由于机械疲劳所带来的温度补偿误差后,构建了多数据融合的、立体化的堆取料机数字健康模型,实现了堆取料机健康状态的智能化预测与立体化监测。通过在秦皇岛港散料矿物储料场的QL6000.55型斗轮堆取料机进行全系统的安装运行,极大促进了料场数字化进程,改变了管理模式,提高了生产效率,直接增加了经济效益。研究表明:该系统能够可靠地提供斗轮取料机的实时工作状态,对基本的故障类型有着一定的预警效果,降低了堆取料机维护的人力与物力投入,为矿区大型机械健康监测提供了有益参考。

关键词：数字孪生堆取料机矿山散料堆场智能制造故障监测

基于光纤传感的港口取料机建模分析与健康监测系统

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矿山机械 2024年第5期52卷 11-18页

作者：熊鲲郭星辰赵峰齐跃峰秦皇岛港股份有限公司第九港务分公司河北秦皇岛066004 燕山大学信息科学与工程学院河北秦皇岛066004 河北省特种光纤与光纤传感器重点实验室河北秦皇岛066004

港口取料机工作条件恶劣,激励源多且激励特性复杂。为了实现取料机的精细化视情维护,提高其结构的可靠性并降低运维费用;同时,为了解决基于电阻应变计等电磁类传感器无法避免的电磁干扰、寿命短等问题,设计了基于光纤传感的港口取料机... 详细信息

港口取料机工作条件恶劣,激励源多且激励特性复杂。为了实现取料机的精细化视情维护,提高其结构的可靠性并降低运维费用;同时,为了解决基于电阻应变计等电磁类传感器无法避免的电磁干扰、寿命短等问题,设计了基于光纤传感的港口取料机在线健康监测系统。以QL6000.55型斗轮取料机作为研究对象,对其进行有限元建模及分析,获得其模态及应力分布云图,确定应变、振动监测点位。通过现场安装试运行,验证了健康监测系统的可信性。试验结果表明,基于光纤传感的港口取料机在线健康监测系统在复杂作业条件下工作6个月,各项性能指标达到设计要求,各项功能满足生产需要。

关键词：取料机光纤传感健康监测应变振动模态

Wavelength and sensitivity tunable long period gratings fabricated in fluid-cladding microfibers

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Chinese Physics B 2022年第1期31卷 299-304页

作者： Wa Jin Linke Zhang Xiang Zhang Ming Xu Weihong Bi yuefeng qi Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province Qin Huangdao 066004China School of Information Science and Engineering Yanshan UniversityQin Huangdao 066004China

We report the fabrication of long period gratings in fluid-cladding microfibers by directly focusing a femtosecond laser beam on the microfibers surface to induce periodical modification a long one side of the microfibers.A long period grating is fabricated in a water-cladding microfiber with a diameter of~5μm,which demonstrates a resonant attenuation of 28.53 dB at wavelength of 1588.1 nm with 10 *** water cladding is changed to be refractive index oil of n=1.33 and alcohol solution with concentration of 5%,the resonance wavelength shifts to 1575.1 nm with resonant attenuation of 24.91 dB and 1594.1 nm with resonant attenuation of 35.9 dB,*** long period grating demonstrates different temperature sensitivities of-0.524 nm/℃,-0.767 nm/℃and-1.316 nm/℃for water,alcohol solution and refractive index oil cladding microfibers,respectively,which means the alterable liquid cladding allows the availability of tunable wavelength and *** fluid-cladding protects the microfibers from external disturbance and contamination and allows more flexibility in controlling the transmission property and sensing characteristics of long period gratings,which can be used as fiber devices and sensors for chemical,biological,and environmental applications.

关键词： fluid-cladding microfiber long-period grating temperature

Long dynamic range spread spectrum optical domain reflectometer

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Optoelectronics Letters 2021年第11期17卷 651-655页

作者： ZHANG Fang ZHANG Hongling qi yuefeng LI Wei School of Information Science and Engineering Yanshan UniversityQinhuangdao 066004China Department of Information Engineering Hebei University of Environmental EngineeringQinhuangdao 066102China School of Electric Engineering Hebei University of ArchitectureZhangjiakou 075000China China Electronics Engineering Design Institute Co. Ltd.Beijing 100142China

The performance of an optical time domain reflectometer(OTDR) is significantly improved using spread spectrum technology. The concept of spread spectrum OTDR(SSOTDR) is proposed, the theoretical basis and simulation results of the new method are given, and the problem of direct application of bipolar spread spectrum codes to OTDR and despreading in the optical domain are solved. The simulation results show the feasibility of the SSOTDR, which exhibits better dynamic range reported to date for a practical long-haul OTDR system without using conventional average technique.

关键词： simulation domain Long dynamic range spread spectrum optical domain reflectometer

Research on Michelson interference refractive index sensing technique based on double-core microfiber

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Optoelectronics Letters 2021年第9期17卷 513-517页

作者： ZHANG Hongling ZHANG Fang CONG Bitong qi yuefeng School of Information Science and Engineering Yanshan UniversityQinhuangdao 066004China Zhangjiakou Key Laboratory for Intelligent Architecture Hebei University of ArchitectureZhangjiakou 075000China Department of Information Engineering Hebei University of Environmental EngineeringQinhuangdao 066004China

We propose a novel refractive index sensor based on Michelson interferometer by using double-core *** the reflection of the end and taper of double-core fiber(DCF),the Michelson interference spectrum is *** to the structure characteristic of double-core microfiber,this interferometer can achieve the measurement of refractive index(RI)and *** experimental results show that the refractive index sensitivity of the interferometer is 2377.80 nm/RIU at the diameter of the taper waist of 8.76μ*** the temperature ranges from 30°C to 60°C,the temperature sensitivity is 0.07048 nm/°*** sensor has the advantage of high refractive index sensitivity.

关键词： interferometer Michelson temperature

Microstructure and mechanical properties of AlSiCu10-10 filler meter brazing 6063 aluminum alloy

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China Welding 2018年第4期27卷 52-56页

作者： Chen Yilan qi yuefeng Liu Xu Beijing Non-ferrous Metals and Rare Earth Research Institute Beijing 100012 China

AlSiCu_(10-10) flame brazing 6063 aluminum alloy was rearched,and microstructure and mechanical properties of brazed joints were tested in the experiments. The interfacial microstructures and brazing phases of brazed joints were analyzed by scanning electron microscopy( SEM) and X-ray energy dispersive spectroscopy( EDS). The strength of brazed joints was aquired by tensile test. The results show that the AlCu_2 and Mg_2 Si phases were formed in the brazing seam,the former is the brittle phase,the Mg_2 Si phases is considered to be the strengthening phase of the aluminum alloy,which can reduce the brittleness caused by AlCu_2. The average tensile strength of brazed butt joint was 115 MPa,and the average shear strength of brazed joint was 26 MPa. Finally,the fracture form and fracture morphology of the brazed joint were analyzed.

关键词： aluminum silicon copper brazing microstructure mechanical properties

Machine learning and neural network supported state of health simulation and forecasting model for lithium-ion battery

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Frontiers in Energy 2024年第2期18卷 223-240页

作者： Nan qi Kang YAN Yajuan YU Rui LI Rong HUANG Lai CHEN yuefeng SU Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China Department of Energy and Environmental Materials School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Electric Vehicle Co. Ltd.Beijing 100176China

As the intersection of disciplines deepens,the field of battery modeling is increasingly employing various artificial intelligence(AI)approaches to improve the efficiency of battery management and enhance the stability and reliability of battery *** paper reviews the value of AI methods in lithium-ion battery health management and in particular analyses the application of machine learning(ML),one of the many branches of AI,to lithium-ion battery state of health(SOH),focusing on the advantages and strengths of neural network(NN)methods in ML for lithium-ion battery SOH simulation and *** is one of the important branches of ML,in which the application of NNs such as backpropagation NN,convolutional NN,and long short-term memory NN in SOH estimation of lithium-ion batteries has received wide *** so far have shown that the utilization of NN to model the SOH of lithium-ion batteries has the advantages of high efficiency,low energy consumption,high robustness,and scalable *** the future,NN can make a greater contribution to lithium-ion battery management by,first,utilizing more field data to play a more practical role in health feature screening and model building,and second,by enhancing the intelligent screening and combination of battery parameters to characterize the actual lithium-ion battery SOH to a greater *** in-depth application of NN in lithium-ion battery SOH will certainly further enhance the science,reliability,stability,and robustness of lithium-ion battery management.

关键词： machine learning lithium-ion battery state of health neural network artificial intelligence

Joining of activated graphite to 6063 aluminum alloy with Al-Cu-Si-Ni-Mg filler metal

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China Welding 2020年第4期29卷 60-64页

作者： Yuan Linlin Huang Xiaomeng Chen Xiaoyu qi yuefeng Beijing Non-ferrous Metals and Rare Earth Research Institute Beijing 100012China Beijing Engineering Research Center of New Brazing Materials for Electronic Information Beijing 100012China

In this work, 6063 aluminum alloy-graphite joint intended for thermal conductive application were realized by applying Al-CuSi-Ni-Mg brazing filler metal and Ag-Cu-Ti pasted on high density graphite substrate to ensure wetting during the brazing process. The interface reactions during brazing and mechanical properties were studied using scanning electron microscopy(SEM) and shear test *** was formed at the graphite/active Ag-Cu-Ti paste interface due to the reaction between Ti and C, and thus the wettability on the graphite was *** is shown that joint with a good quality can be produced at a brazing temperature of 550 ℃ for 10 *** average tensile strength of the joint is 21 MPa. thus the wettability on the graphite was *** is shown that joint with a good quality can be produced at a brazing temperature of 550 ℃ for 10 min.

关键词： graphite aluminum alloy metallization reactive brazing

Novel Fiber Optic Current Transformer With New Phase Modulation Method

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Photonic Sensors 2020年第3期10卷 275-282页

作者： yuefeng qi Mingjun WANG Fengxian JIANG Xin ZHANG Bitong CONG Yanyan LIU School of Information Science and Engineering Yanshan UniversityQinhuangdao 066004China The Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province Qinhuangdao 066004China Li Ren College of Yanshan University Qinhuangdao 066004China

Based on the transverse electro-optic effect of lithium niobate crystal,combined with polarizers and Faraday rotator,this paper presents a collinear closed-loop fiber optic current transformer with spatial non-reciprocity modulation method,and the feasibility of the scheme is verified by both the theoretical and experimental *** detection scheme avoids the limitation of the transition time of the sensing fiber coil on the phase modulation frequency,improves the sensitivity and stability of the system,and reduces the volume and cost of fiber optic current *** sawtooth wave modulation scheme is adopted to realize phase bias modulation and feedback modulation through phase shift of sawtooth wave to achieve closed-loop detection effect,which enhances the signal to noise ratio and simplifies demodulation *** experimental results show that the current ratio errors measured at room temperature range from 1%to 120%of rated current meet the requirements of national standard GB/T 20840.8-2007 and reach the accuracy level of *** temperature stability of the current transformer is also tested,and the ratio error measured at the rated current does not exceed±0.2%in the range of-30℃to 50℃.

关键词： Fiber optic current transformer spatial phase modulation closed-loop detection current ratio error temperature stability