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Temperature field simulation of laser homogenizing equipment

Juanjuan WANG, Yunshan WANG, Fudong ZHU

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 49-52 doi: 10.1007/s11465-009-0005-1

Abstract: The laser homogenizing equipment was devised using the ring scanning principle.A laser scanning ring facula is obtained when the laser beam goes through the equipment’s optical systemThe scanning ring facula’s mathematic model is established based on the temperature field’s superposingThe ring facula’s light intensity distribution and temperature distribution characteristics are achievedThe uniform hardness layer and better process quality can be attained using the ring facula optimized

Keywords： laser homogenizing technology     laser scanning ring facula     temperature field    

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Analysis and comparison of laser cutting performance of solar float glass with different scanning modes

Wenyuan LI, Yu HUANG, Youmin RONG, Long CHEN, Guojun ZHANG, Zhangrui GAO

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1,   Pages 97-110 doi: 10.1007/s11465-020-0600-8

Abstract: Cutting quality and efficiency have always been important indicators of glass laser cutting.Laser scanning modes have two kinds, namely, the spiral and concentric circle scanning modes.modes can achieve high-performance hole cutting of thick solar float glass using a 532-nm nanosecond laserThe mechanism of the glass laser cutting under these two different scanning modes has been described.Moreover, the best cutting efficiency scanning mode is 14.2% faster than that in the spiral scanning

Keywords： laser cutting     solar float glass     scanning mode     surface quality     cutting efficiency    

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New kind of subarea-parallel scanning mode for laser metal deposition shaping

BIAN Hongyou, LIU Weijun, ZHAO Jibin

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 417-422 doi: 10.1007/s11465-007-0071-1

Abstract: A scanning mode is the key technology in a laser metal deposition shaping (LMDS) fabrication process.On the basis of the analysis of existing scanning modes and their influences on the fabrication efficiencyA new kind of subarea-parallel scanning mode for LMDS based on a subdividing profiled outline into monotonousSecond, the parallel scanning paths of all monotonous polygon subareas are finished, which diminishesthe length of the scanning line.

Keywords： scanning     parallel scanning     practical application     fabrication efficiency     LMDS    

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Influence of Particle Size on Laser Absorption and Scanning Track Formation Mechanisms of Pure TungstenPowder during Selective Laser Melting Article

Jiayao Zhang, Dongdong Gu, Ying Yang, Hongmei Zhang, Hongyu Chen, Donghuai Dai, Kaijie Lin

Engineering 2019, Volume 5, Issue 4,   Pages 736-745 doi: 10.1016/j.eng.2019.07.003

Abstract:

A three-dimensional laser absorption model based on ray tracing was established to describe the coupledinteraction of a laser beam with particles in the powder layers of pure tungsten (W) material processedby selective laser melting (SLM).scanning tracks is presented here.With an increase in particle size, the powder layer absorbs less laser energy.

Keywords： Selective laser melting (SLM)     Tungsten     Ray-tracing model     Absorptivity     Laser scanning tracks    

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A Dual-Platform Laser Scanner for 3D Reconstruction of Dental Pieces Article

Shuming Yang, Xinyu Shi, Guofeng Zhang, Changshuo Lv

Engineering 2018, Volume 4, Issue 6,   Pages 796-805 doi: 10.1016/j.eng.2018.10.005

Abstract: paper presents a dual-platform scanner for dental reconstruction based on a three-dimensional (3D) laser-scanningThe scanner combines translation and rotation platforms to perform a holistic scanning.A hybrid calibration method for laser scanning is proposed to improve convenience and precision.

Keywords： Laser scanning     Hybrid calibration     Neural network     Dental pieces    

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Frequencies of circular plate with concentric ring and elastic edge support

Lokavarapu Bhaskara RAO,Chellapilla Kameswara RAO

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2,   Pages 168-176 doi: 10.1007/s11465-014-0299-5

Abstract: the flexural vibrations of circular plates having elastic edge conditions along with rigid concentric ringdifferent sets of values of elastic rotational and translation restraints and the radius of internal rigid ringThe effects of rotational and linear restraints and the radius of the rigid ring support on the vibrationparameter presented in this paper for varying values of restraint parameters and the radius of the rigid ring

Keywords： circular plate     frequency     elastic edge     rigid ring     mode switching    

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Fundamental buckling of circular plates with elastically restrained edges and resting on concentric rigid ring

Lokavarapu Bhaskara Rao, Chellapilla Kameswara Rao

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 3,   Pages 291-297 doi: 10.1007/s11465-013-0255-9

Abstract: work presents the existence of buckling mode switching with respect to the radius of concentric rigid ringIn general, the plate may buckle in an axisymmetric mode but when the radius of the ring support becomesThe optimum radius of the concentric rigid ring support for maximum buckling load is also determined.Introducing internal rigid ring support, when placed at an optimal position increases the elastic buckling

Keywords： buckling     circular plate     elastically restrained edge     rigid ring support     mode switching    

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Review of MEMS differential scanning calorimetry for biomolecular study

Shifeng YU, Shuyu WANG, Ming LU, Lei ZUO

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 4,   Pages 526-538 doi: 10.1007/s11465-017-0451-0

Abstract:

Differential scanning calorimetry (DSC) is one of the few techniques that allow direct determinationbovine serum albumin denaturation study, the relationship between the melting point of lysozyme and the scanning

Keywords： differential scanning calorimetry     biomolecule     MEMS     thermodynamic    

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A Portable Noncontact Profile Scanning System for Aircraft Assembly

Bing Liang, Wei Liu, Kun Liu, Mengde Zhou, Yang Zhang, Zhenyuan Jia

Engineering 2022, Volume 15, Issue 8,   Pages 207-214 doi: 10.1016/j.eng.2020.09.017

Abstract:

Three-dimensional (3D) profile scanning plays a crucial role in the inspection of assembled largeThen, a profile-driven 3D automated scanning method and strategy are designed to rapidly scan and reconstructThe automated scanning process is completed in a timeframe of 208 s with an average error of less than

Keywords： Aircraft testing     Three-dimensional measurement     Profile reconstruction     Automated scanning     Scanning strategy    

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A novel algorithm for frequency dependent modeling of ferrite ring and its optimum design to study VFTO

Mehrdad MAJIDI, Hamid JAVADI, Moein MANBACHI

Frontiers in Energy 2014, Volume 8, Issue 1,   Pages 90-100 doi: 10.1007/s11708-013-0286-2

Abstract: The main advantage of this paper is its new proposed algorithm according to the ferrite ring frequencyThis paper examines the effects of three compositions of the ferrite ring on VFTO suppression.Moreover, it estimates the dimension of the ferrite ring based on the SF6 gas insulation withstand andFurthermore, it gains VFTO attenuated percentages due to the installation of the ferrite ring in different

Keywords： comsol multiphysics     EMTP-RV     ferrite ring     gas insulated substations (GIS)     transient over-voltage     insulation    

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Study on Finite Element Method for Calculation of Stress on External Ring of One-way Clutch

Luo Yixin,Wu Bo

Strategic Study of CAE 2004, Volume 6, Issue 9,   Pages 56-59

Abstract:

At present there is no appropriate method for calculation of stress on external ring of a one-wayIn this paper, according to characteristics of the external ring, the method of finite element analyaisfactors which have influence on computational accuracy have been studied, and the stress on external ringanalyais is really an attractive method for the calculation of stress on parts similar to external ring

Keywords： clutch     external ring     stress     finite element    

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Development of Laser Cutting and Joining Processing

Chen Li, Gong Shuili, He Enguang

Strategic Study of CAE 2020, Volume 22, Issue 3,   Pages 78-84 doi: 10.15302/J-SSCAE-2020.03.012

Abstract:

Laser cutting and joining technology is indispensable as an advancedbe surely promoted by the integration of laser technology and digital manufacturing technology.joining and cutting technology, namely, laser welding, laser cutting, laser drilling, and laser markingThe problems faced by the development of the laser joining and cutting technology are discussed.unit, laser materials processing, and intelligent integration.

Keywords： laser material processing     laser welding     laser cutting     laser drilling     laser marking    

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Intelligent algorithm for optimal meter placement and bus voltage estimation in ring main distribution

L. RAMESH, N. CHAKRABORTY, S. P. CHOWDHURY

Frontiers in Energy 2012, Volume 6, Issue 1,   Pages 47-56 doi: 10.1007/s11708-011-0159-5

Abstract: The advancement in power distribution system poses a great challenge to power engineering researchers on how to best monitor and estimate the state of the distribution network. This paper is executed in two stage processes. The first stage is to identify the optimal location for installation of monitoring instrument with minimal investment cost. The second stage is to estimate the bus voltage magnitude, where real time measurement is conducted and measured through identified meter location which is more essential for decision making in distribution supervisory control and data acquisition system (DSCADA). The hybrid intelligent technique is applied to execute the above two algorithms. The algorithms are tested with institute of electrical and electronics engineers (IEEE) and Tamil Nadu electricity board (TNEB) benchmark systems. The simulated results proves that the swarm tuned artificial neural network (ANN) estimator is best suited for accurate estimation of voltage with different noise levels.

Keywords： artificial intelligence     power distribution control     state estimation    

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Strategic Research on China’s Laser Technology and Its Application by 2035

Research Group of Strategic Research on China’s Laser Technology and Its Application by 2035

Strategic Study of CAE 2020, Volume 22, Issue 3,   Pages 1-6 doi: 10.15302/J-SSCAE-2020.03.001

Abstract:

To promote the development of laser technology and its application, theAcademy of Engineering launched a major consulting project “Strategic Research on China’s LaserIt briefly analyzes laser technology and its instrumental, leading, and disruptive role in scientificinnovation ecology of laser industry.cultivation of the laser and optical disciplines.

Keywords： laser technology，laser manufacturing，laser communication，laser diagnosis and treatment    

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Generation of noise-like pulses and soliton rains in a graphene mode-locked erbium-doped fiber ring laser Research

Weiyong Yang, Wei Liu, Xingshen Wei, Zixin Guo, Kangle Yang, Hao Huang, Longyun Qi,yangkangle@sgepri.sgcc.com.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 3,   Pages 287-436 doi: 10.1631/FITEE.1900636

Abstract: Ubiquitous power (IoT) is a smart service system oriented to all aspects of the power system, and has the characteristics of universal interconnection, human-computer interaction, comprehensive state perception, efficient information processing, and other convenient and flexible applications. It has become a hot topic in the field of IoT. We summarize some existing research work on the IoT and framework. Because it is difficult to meet the requirements of ubiquitous power IoT for in terms of real time, security, reliability, and business function adaptation using the general framework software, we propose a trusted framework, named “EdgeKeeper,” adapting to the ubiquitous power IoT. Several key technologies such as security and trust, quality of service guarantee, application management, and cloud-edge collaboration are desired to meet the needs of the framework. Experiments comprehensively evaluate EdgeKeeper from the aspects of function, performance, and security. Comparison results show that EdgeKeeper is the most suitable framework for the electricity IoT. Finally, future directions for research are proposed.

Keywords： 物联网；泛在电力物联网；边缘计算；可信计算；网络安全    

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Title Author Date Type Operation

Temperature field simulation of laser homogenizing equipment

Juanjuan WANG, Yunshan WANG, Fudong ZHU

Journal Article

Analysis and comparison of laser cutting performance of solar float glass with different scanning modes

Wenyuan LI, Yu HUANG, Youmin RONG, Long CHEN, Guojun ZHANG, Zhangrui GAO

Journal Article

New kind of subarea-parallel scanning mode for laser metal deposition shaping

BIAN Hongyou, LIU Weijun, ZHAO Jibin

Journal Article

Influence of Particle Size on Laser Absorption and Scanning Track Formation Mechanisms of Pure TungstenPowder during Selective Laser Melting

Jiayao Zhang, Dongdong Gu, Ying Yang, Hongmei Zhang, Hongyu Chen, Donghuai Dai, Kaijie Lin

Journal Article

A Dual-Platform Laser Scanner for 3D Reconstruction of Dental Pieces

Shuming Yang, Xinyu Shi, Guofeng Zhang, Changshuo Lv

Journal Article

Frequencies of circular plate with concentric ring and elastic edge support

Lokavarapu Bhaskara RAO,Chellapilla Kameswara RAO

Journal Article

Fundamental buckling of circular plates with elastically restrained edges and resting on concentric rigid ring

Lokavarapu Bhaskara Rao, Chellapilla Kameswara Rao

Journal Article

Review of MEMS differential scanning calorimetry for biomolecular study

Shifeng YU, Shuyu WANG, Ming LU, Lei ZUO

Journal Article

A Portable Noncontact Profile Scanning System for Aircraft Assembly

Bing Liang, Wei Liu, Kun Liu, Mengde Zhou, Yang Zhang, Zhenyuan Jia

Journal Article

A novel algorithm for frequency dependent modeling of ferrite ring and its optimum design to study VFTO

Mehrdad MAJIDI, Hamid JAVADI, Moein MANBACHI

Journal Article

Study on Finite Element Method for Calculation of Stress on External Ring of One-way Clutch

Luo Yixin,Wu Bo

Journal Article

Development of Laser Cutting and Joining Processing

Chen Li, Gong Shuili, He Enguang

Journal Article

Intelligent algorithm for optimal meter placement and bus voltage estimation in ring main distribution

L. RAMESH, N. CHAKRABORTY, S. P. CHOWDHURY

Journal Article

Strategic Research on China’s Laser Technology and Its Application by 2035

Research Group of Strategic Research on China’s Laser Technology and Its Application by 2035

Journal Article

Generation of noise-like pulses and soliton rains in a graphene mode-locked erbium-doped fiber ring laser

Weiyong Yang, Wei Liu, Xingshen Wei, Zixin Guo, Kangle Yang, Hao Huang, Longyun Qi,yangkangle@sgepri.sgcc.com.cn

Journal Article