bluuebunny/crossref_metadata_2025 huggingface dataset:
Mechanical Analysis and Experimental Research of Working in the Earth Helical Blade
Authors: Yan Bing Bing , Ren Wen Bo , Yin Bao Lin , Zhang Lian Jun , Wang Jun Fa
Published: March 2015

Based on the Rankine earth mechanics theory, the mechanics model that the helical blade working in earth is simplified in this paper, and an experimental platform for discovery the relationship that between helical blade structure parameters and the driving torque is designed when the helical blade working in the earth. Through a series of experiments, comparative analysis the effect of the helical blade width, pitch on the driving torque, the experimental results verified the feasibility of the helical blade operation way of working in the earth, which laid the theoretical foundation for the subsequent development of the spiral in the earth device.
Model of a Constructive Fuctional Optimization of the Cardan Cross
Authors: Avrigean Eugen
Published: March 2015

This paper aims to establish an optimization model using the Ansys program, and taking into account the specific constraints depending on the functional role of the specific area. We present certain calculation parameters applied to the cardanic transmission of the Dacia, this cardanic transmission being considered an optimization model. The entire cardanic transmission was analyzed, resulting that the cardan crosses are parts which are strained the most, and that is why it will be here that the optimization will be focused, in terms of minimizing the Von Mises stress.
Six-Axis Folding Frame Structure Design and Research
Authors: Meng Fan Bo , Liu Hong Bin
Published: March 2015

For the shortcomings of existing multi-axis aircraft rack design a new folding mechanism of the machine arm, and then design a six-axis folding rack. By calculating the structural strength of the machine arm and apply engineering analysis software for the six-axis folding rack mechanics simulation analysis to verify its structural design is reasonable. Use 3D software to build a three-dimensional model of the six-axis folding rack, and use rapid prototyping technology, access to the kind of physical prototype six-axis folding rack, after the actual test, consistent with mission requirements.
The Crankshaft Strength Checking Simulation Based on ANSYS
Authors: Cheng Qi Qiang , Li Jiang Jiang
Published: March 2015

The crankshaft quality directly affect the engine performance and longevity. Using of ANSYS software to analysis the reason of crankshaft fatigue failure form and vibration. It is clear that the material and strength selection of crankshaft is very import in design of it .
Design of Intelligent Garbage Can
Authors: Zhang Yin Jun , Lu Zheng Jie , Nie Jian Bo , Wang Hao Ran
Published: March 2015

Due to the current existing outdoor trash put, cannot effectively separate collection, easy to produce odor and other issues, In this paper we designed a solar intelligent trash. The trash can has a better appearance, can effectively separate collection, automatic flip, the use of solar power to achieve lighting, voice prompts, deodorant and other functions. Smart trash concise design, environmental protection, and harmony.
A Study of Reverse Engineering Based on 3DSS Data Acquisition
Authors: Li Xiang , Huang Jun Min
Published: March 2015

This work introduces the workings of reverse engineering, its characteristics and application methods and proposes a data acquisition system applicable to industrial design, namely, three dimensional sensing system (3DSS). This work also gives a detailed account of 3DSS data acquisition methods and issues that deserve special attention in operation. A car model reconstruction case is provided as an example to study the performance of 3DSS in reverse engineering. Results have confirmed the significant role of this data acquisition method in reverse engineering.
Adaptive Denoising Algorithm for Scanning Beam Points Based on Angle Thresholds
Authors: Dong Ting Jian , Ding Hua Peng , Wang Tao , Wang Hao , Chen Jin
Published: March 2015

A local adaptive neighborhood model is proposed in this paper in order to deal with the mistake judgment in the existing scanning beam point cloud denoising algorithms. Such a model regards larger curvatures as the potential noises, can select angle thresholds of noise points and the median values of filtering windows adaptively, so as address the issues of mistake judgment and missing judgment of the point clouds denoising algorithms with different curvatures. The adaption theory in the angle threshold denoising algorithm classifies the noise points and data points. Therefore, it can ensure the smoothness in low frequency, and as well keep the high frequency characteristics. The new method improves the accuracy of median filtering, prevents the diffusion of noise, remove noises effectively while preserving sharp features, and avoid fuzzy data margin.
Design and Simulation of Injection Mold for the Digital Camera Shell Based on Moldflow
Authors: Jiang Ning , Wang Chuan Yang
Published: March 2015

The camera shell is analyzed by using Finit Element Method (FEM) to judge reliability of the structure. Static structural and explicit dynamics analysis are conducted. The results provide valuable reference for the structural optimization design. Three schemes for injection mold are developed. Injection moulding process of the shell is simulated by applying Moldflow. The volumetric shrinkage, shrink mark index, total deformation, fill time and clamping force are analyzed. The results show that combining Moldflow with FEM method can not only shorten the construction period, but also ensure the molding quality.
The Design of Curler for Irregular Metal Lid Based on Pro/E
Authors: Zhu Cong Rong , Yang Peng
Published: March 2015

Canned foods with no preservatives are the safe alternatives to fresh and frozen foods which help to meet dietary needs. With the prevalence of canned foods, the sales grow rapidly which provides a bright prospect for metal packaging machinery. The appearance of the metal can is one of the important factors that will affect the sale. Therefore, canning companies pay special attention to the personalized metal packaging and attach great importance to the development and application of special-shaped cans, thus, square or oval cans are widely used. In view of the ubiquitous problems existing in present curler for irregular food metal lid, such as high costs, high rejection rate and low efficiency, etc., we have designed a new type of curler for irregular lids, the model of curler is designed based on Pro/E software. The curler can blank and feed automatically. Applications show that in contrast with the existing curler, the new curler has the characteristics of more compact structure, more stable performance, lower costs and higher efficiency etc.
Simulation Analysis of a Kind of Sewing Machine Needle and Pick Line Mechanism Based on ADAMS
Authors: Wang Peng Cheng , Wang Li Hua , Yang Zhu , Shi Hai Song
Published: March 2015

In this paper, A method of co-simulation is used to analysis the kinematics and dynamics property of the sewing machine mechanism, using Pro/E established the needles and pick line simplified model, and then the model is simulated in Adams, obtained the kinematics and the dynamics property,such as needle movement track and velocity and acceleration curve, and selects the line of bearing end under different drawing reaction force, torque changes curve. Taking great advantage of Pro/ E and ADAMS, the mechanism motion curves and value obtained through this method to verified the feasibility and reliability of the design.
Design of Seven-Speed AT Scheme Based on the Romaxdesigner
Authors: Li Jing Hua , Li Jiang Jiang
Published: March 2015

Using of the simulation tool Romaxdesigner to designe new seven-speed Automatic Transmission and get the reasonable spatial arrangement .Meanwhile ,the simulation results prove the reasonable of leverage method applied in designing the Automatic Transmission .
A High-Sensitivity Micromechanical Silicon Resonant Accelerometer without Mechanical Coupling
Authors: Zhang Qi , Zhou Si Yu , Ju Zi Yan , Huang Li Bin
Published: March 2015

Micromechanical silicon resonant accelerometer can easily realize high-accuracy measurement by taking the digital signal as the output. Thus, this accelerometer has become popular in the field of micromechanical accelerometer. One-mass accelerometer with differential structure has blind area in measuring, and to overcome this deficiency, a new structure without mechanical coupling is designed. This new structure can cut off coupling channels by isolating the mass, and vibration decoupling between two resonators can be achieved structurally. Furthermore, the scale factor of the designed accelerometer is as high as 295 Hz/g. This finding indicates that this accelerometer has high mechanical sensitivity, which reduces the difficulty of follow-up testing.
Identification of Transformer Inrush Current Based on Wavelet Packet Energy Spectrum
Authors: Gong Mao Fa , Li Mei Rong , Gong Zheng , Yin Fan Jiao , Wang Zhong Gang , Wang An Yang
Published: March 2015

In this paper, a new method using wavelet packet energy spectrum to identify transformer inrush and internal fault current was proposed. Wavelet packet transform respectively decomposed inrush and fault current, then calculated the energy of each frequency band of decomposed signal. Finally, the conclusion showed that the energy of internal fault in high frequency band is much less than that of inrush. The difference was quantified and it could be observed intuitively. Through extensive simulations, this paper proves that the method in terms of identifying transformer inrush is accurate and effective.
Cooperative Artificial Fish Swarm Optimization
Authors: Zhao Hong Wei , Tian Li Wei
Published: March 2015

Basic Artificial Fish Swarm(AFS) Algorithm is a new type of heuristic swarm intelligence algorithm but optimization is difficult to get a very high precision due to the randomness of the artificial fish behavior.This paper presents an extended AFS algorithm, namely the Cooperative Artificial Fish Swarm (CAFS),which significantly improves the original AFS in solving complex optimization problems. In this work,firstly,CAFS algorithm is used for optimizing six widely-used benchmark functions and the comparative results produced by CAFS, Particle Swarm Optimization (PSO) are studied.Secondly,K-medoids and CAFS algorithm is used for data clustering on several benchmark data sets.The simulation results show that the proposed CAFS outperforms the other two algorithms in terms of accuracy,robustness and convergence speed.
Particle Filtering Algorithm Based on Dynamic Multi-Feature Fusion
Authors: Tao Wu , Xu Yong Sheng , Wang Xiao Yan
Published: March 2015

The target tracking technology in image sequence is of great meanings in the military and civilian areas, by using Monte Carlo method to complete the Bayesian recursive, particle filter is widely used in the systems of non-linear and non - Gaussian and good results are gained. However, particle filter there are also disadvantages in terms of sample impoverishment, the choosing of proper proposal distribution, real time and so on. In this paper, the particle filter is utilized to in the feature fusion of the moving target, and the experimental results show that the proposed algorithm has certain effect both on the remission of the sample impoverishment and the enhancement of the tracking robustness.
Non-Linear Bearing Force of the Bearing and its Influence on Vibration of Spindle-Bearing System
Authors: Ma Wei , Si Zhan Feng , Yu Yong Jian
Published: March 2015

In order to study the influence of the non-linear bearing force on the vibration of spindle bearing system, non-linear bearing force is deduced in the working state of the rolling bearing. Non-linear dynamic equations of a system are established and the numerical method is used to solve the equations. The system axis path chart, the bifurcation diagram and the Poincare figure are drawn in Matlab and used to analyze the characteristics of the system vibration with the different parameters. The results show that the change of the non-linear bearing force will cause the vibration of the system and bifurcation phenomena will appear in the system. Speed and damping are important parameters that influence the vibration form. By choosing reasonable working parameters the vibration of system can be reduced and the stability of the system can be improved.
The Research of Noise Characteristics on Shenzhen Metro Platform
Authors: Tian Jian Hui , Li Bing , Jian Lian
Published: March 2015

The noise SPL and spectrum characteristics were tested and analyzed for the Shenzhen metro platform when the metro is inbound and outbound by using the noise and vibration measurement and analysis system. Time-domain SPL distribution diagrams shows, causing the largest noise level inside platform is mainly from the station radio, when no station radio, metro wheel-rail noise and air-conditioning fan noise have become a major SPL source in platform. The noise level at the platform is between 73dB-76dB. Frequency domain noise spectrum diagram shows, the noise SPL peak appeared in both low frequency and mid frequency ranges. Low frequency noise peak appears at 125Hz and 250Hz frequency band, mainly from the site of passengers talking and footsteps. Mid frequency noise peak is located in the 500Hz-1000Hz range, mainly from station radio, metro wheel-rail noise and air-conditioning fan and so on. This study provides a reference for noise reduction design of the metro platform.
Infinite Cylinder Lumped Parameter Analysis Method of Unsteady-State Conduction
Authors: Gu Xiang Hong , Shang Yong Mao , Bi Hai Yang
Published: March 2015

The paper extends the traditional lumped parameter analysis method of unsteady-state. Under the convection boundary 0<Bi<∞, a mean temperature lumped parameter analysis method is studied and the mean temperature response formula has been established. Taking an infinite cylinder as an example, the paper presents the regular pattern of the transient mean temperature value and discusses the numerical analysis. The method for solving the unsteady-state conduction in the paper is more convenient and practical than the M.P. Heisler charts that had been used in textbooks of native and foreign countries.
On Adaptable Design for SCARA Manipulator with Quick-Replaceable Arms
Authors: Zeng Ling Sheng , Zhang Zi Qiang , Li Run Dian , Zhao Yong Jie , Kang Qing Ge , Chen Zhang Lin
Published: March 2015

By surveying SCARA manipulator in the market, the question that the overall length of arms is fixed, which leads its operating range to be relatively fixed, and the manipulator has badly adaptive can be found. Aiming at the problem, a SCARA manipulator whose arms can be replaced quickly had been designed according to the concept of adaptable design, and the principle of replacement arms had been put forward basing on the analysis to the minimum operating radius of manipulator in this paper. Moreover, an adaptable interface for replacing quickly different grippers during the process of production had been designed in the paper.
Accuracy Investigation of Active Flow Control Using Synthetic Jets
Authors: Gao Na , Pu Chen , Chen Bao
Published: March 2015

2nd order implicit format is implemented in the Navier-Stokes code to deal with instantaneous item unsteady flows. Three simulations are made to testify the method on flow control. First, the external flow fields of synthetic jets are simulated, the mean velocity on the center line, the jet width and velocity distribution are compared well with experimental results. Secondly, the flow fields of synthetic jet in a crossflow are simulated, orifice slot, the mean velocity on the center line and velocity distribution are compared well with experimental results. Finally, the flow control experiments on separation of airfoil are simulated, control methods include steady suction and synthetic jets. Both methods show their ability to favorably effect the flow separation, shortening the length of separation bubble and improving the pressure levels in separation areas in different degrees.
An Investigation of the Vortex in a Submersible Axial Flow Pump Impeller
Authors: Zhang Hong Ming , Zhang Li Xiang
Published: March 2015

The paper presents numerical simulation of the vortex in a submersible axial flow pump impeller using OpenFoam code. A mixture assumption and a finite rate mass transfer model were introduced to analyze vortex. The finite volume method is used to solve the governing equations of the mixture model and the pressure-velocity coupling is handled via a Pressure Implicit with Splitting of Operators (PISO) procedure. Simulation results have shown that the cavitation may occur on the lower portion of impeller suction side. And the blade channel vortex will be formed in the impeller. It can induce the pressure pulsation in the impeller and can result in reduced efficiency of the submersible axial flow pump.
Design of Hydraulic Loading System for the Little Loading Bearing Testing Machine
Authors: Xu Li Ping , Li Lan  Jie
Published: March 2015

Utilizing hydraulic loading to achieve a little loading, is one of the hydraulic loading technical problems. For the purpose of bearing testing machines’ little loading, a hydraulic loading method was presented based on damps and electro-hydraulic proportional technique. Damps decreased the pressure and shunted. Damps calculation and the loading principle were researched, and the system was simulated with AMESim software. The result shows that this system meets the little loading requirement.
Influence of the Distribution of Dual Cascades on Double Vanes Based on the Solid-Liquid Two-Phase Flow
Authors: Liu Fu Chun , Zhang Jian Rong , Wang Dong
Published: March 2015

The relative positional relationship between the stay vanes and guide vanes is researched to analyze the impact on the hydraulic performance of the Turbine based on N-S equations and RNG k-ε turbulence model under the conditions of sandy water with the numerical simulation method. There are main five kinds of the relative positional relationship between the dual cascades is used to analyse the trends of the distribution about the pressure and velocity. The relative circumferential positions between the dual cascades have obviously effect on the flow verified. And the velocity vector and the pressure distribution on the surface of the guide vanes are studied further. The results show that energy performance is best if little circumferential position differences between the dual cascades in two typical conditions. However, the distribution about the pressure and velocity is uneven on the active surface of guide vanes, exacerbating the local abrasion of the vanes.
Loss Calculation and Software Design Based on the Combination of Electric Circuit and Electromagnetic Field Solution in High Speed Permanent Magnet Machine
Authors: Kong Xiao Guang , Fan Li Ping , Fu Yan Qiu
Published: March 2015

Mathematics model of loss for high speed machine is discussed. Calculation method of core loss and high-frequency additional copper loss of winding based on finite element analysis is introduced. Experiment results of losses are presented. In order to realize calculation and analysis, a method of PM machine by calling ANSYS and MATLAB based on VB of the combination of electric circuit and electromagnetic field solution is presented in this paper. The design and feature analysis of high speed PM machine takes an example to validate the accuracy and advantage.
Study on Mathematical Model in Working Process of Automotive Air Conditioning Scroll Compressor
Authors: Zhang Yu Fan , Ji Zhi Hao , Liu Jin Yan , Xiong Shu Sheng , Huang Xiao Bo , Mao Bin Tao , Guo Bao Sheng , Ying Zhi Chao , Sun Ya Bo
Published: March 2015

In order to study the working features of automotive air conditioning scroll compressor, this paper uses mathematical model of working process to analyze it. After studying working process, a equation of suction volume is given. The thermodynamic model of compression chamber and back pressure chamber includes mass conservation and energy conservation. Based on Hydromechanics, leakage models of radial leakage and tangential leakage are discussed. The model lays a foundation of automotive air conditioning scroll compressor performance simulation.
Study on Pepper Decorticating Technology and Equipment
Authors: Li Ming Fu , Zhang Yuan , Luo Wen Yang , Ge Chang , Li Yu Lin , Tan Guang Yu
Published: March 2015

This paper introduces the common ways for pepper decorticating and the current status of their applications and effects. According to the actual needs of market development and our analysis on peppers’ physical structures, three kinds of decorticating principles are put forward which include spiral, frictional and centrifugal decorticators and their mechanisms and advantages are analyzed in detail respectively, which will be highly instructive to the research of pepper decorticating equipment.
Arc-Fencing Plane-Iron's Safety Protection Device in MQ44 Multipurpose Woodworking Machine Tool
Authors: Wang Shao Ni
Published: March 2015

According to the wounding phenomenon of MQ44 multipurpose woodworking machine tool often appeared in production, We have carried on the thorough analysis and research, developed arc-fencing plane-iron’s safety protection device. After technical modification by installing the device, there are no hurting people production safety accident occurs. So we introduce the plane-iron’s safety protection device detailed in order to promote and apply the excellent results about machine reformation.
Kinematics Simulation of Shaper Quick-Return Mechanism
Authors: Zhou Li Bin , Chen Huan Guo
Published: March 2015

Mechanical model and simulation model of shaper quick-return mechanism are introduced based on ADAMS. The number of rigid bodies is reduced by using composite joints constraint . It doesn’t need any other softwares and data interfaces in the simulation.The results prove the correctness of the simplified model.It improves the design efficiency and speed of simulation and provides a theoretical basis for the design and analysis of other six-bar mechanism.
Preliminary Research on Connecting Strategy between Back-Up Structure and Alidade for 110-m QitTai Radio Telescope
Authors: Xu Qian , Li Lin , Cheng An Yu
Published: March 2015

The QTT (QiTai 110m radio telescope) antenna, with large aperture and high main-reflector surface precision, whose connecting strategy between back-up structure and alidade was investigated. In order to make the reflector surface deformation coordinated, the connecting strategies of “umbrella supporting”, “space truss” and “double gear” structure were constructed and analyzed based on FEM (finite element method). The results show that “double gear supporting” is superior to “space truss structure”, and the latter is better than “umbrella supporting”, while in the “umbrella supporting structure”, the smaller cone angle is good for reflector deformation coordination. These structures are easy to achieve antenna structure “homology” design.
A Circular Phase Shifting Transformer for Multi-Pulse Rectifier
Authors: Yang Lv , Zhang Jun Hong , Wang Tie Jun
Published: March 2015

This paper designed a 3/12 phase circular phase shifting transformer applied to multi-pulse rectifier. The transformer is built by using rotating magnetic field principle, and the ferromagnetic structure is similar to an induction motor. Compared with the general column iron core phase shifting transformer, the circular phase shifting transformer has the advantages of compact structure, more symmetric magnetic circuit, and the design of primary and secondary winding is more simple. This paper established the mathematical model of the circular shifting transformer, the voltage equations are derived. Then analysis the inhibitory effect of harmonic wave in 24 pulse rectifier. Verify the feasibility of the circular phase shifting transformer through the experiment, when the circular phase shifting transformer is applied to multi-pulse rectifier, it is effective to suppress the harmonic wave of the Power grid.
Application of AC Chopping Voltage Controller in Coiling Coater
Authors: Wang Xiao Yan , Zhou Zhi Wen , Wu Tao
Published: March 2015

In this paper a series of research is done on an AC chopping voltage controller which is based on DSP. And the control principle is analyzed and the control circuit based on TMS320F2812 is designed. And then the details of the power supply is presented, such as the topology structure, the working principles of the main loop and the design of the hardware control system . The power supply herein has the merits of wide range regulation of voltage, high power-factor, the ease of harmonic filtering and so on. The effectiveness and validity of the design is certified by the experimental results.
Battery Fast Charging Technology Based on Fuzzy Control
Authors: Zhao Shu Guo
Published: March 2015

With the wide application of electric vehicles, the battery fast charging has become a subject of research. In this paper, how to quickly charge the battery and prolong the life of the battery are described. By analyzing all kinds of storage battery charging method, I have summarized a fast charging technology based on fuzzy control, this method can quickly charge the batteries, and can prolong the life of the battery.
Inverse Kinematics Analysis of a 2-Dof Spherical Parallel Shift Manipulator
Authors: Chen Lu Xi , Li Zhan Xian , Wang Zhi Jun
Published: March 2015

Shift manipulator requires the transmission shift lever end Chinese characters ‘Wang’ motion, this paper proposes a kind of 2-Dof asymmetric spherical parallel mechanism to realize the movement. The structure characteristic and the trajectory of the manipulator are described. The position inverse solution of the 2-Dof spherical parallel mechanism is obtained by inverse kinematics analysis. Inverse kinematics simulation of the parallel mechanism is proposed finally.
The Research of Coconut Shell Crusher
Authors: Fu Yu Peng , Zhang Yan
Published: March 2015

Hainan Island has a good reputation for "Coconut Island". The production of coconut is more than 80 percent in China. However, the development of coconut industry in Hainan lags behind when compared to other industries, because the comprehensive use ratio of coconut is still less. One reason of barring the coconut industry development owes to lacking of a good method to smash the coconut shell. Contraposing the current single method of smashed coconut shell, the low productivity and other problems, I design an achievable and automated coconut shell crusher based on the PLC control program to resolve the problem of artificial broken coconut shell, to save labor forces, to shorten labor time, to improve the production efficiency, to improve the utilization rate of coconut, to expand the economic benefits, and to promote the development of coconut industry.
Design and Implementation of Underground Locomotive Collision Avoidance System
Authors: Du Jian Xia
Published: March 2015

combined with the characteristics of the current market a variety of vehicle anti-collision device, design a kind of mine intelligent motor vehicle collision avoidance system. The device has the microcomputer real-time control and data processing functions, combined with ultrasonic ranging technology, sensor technology, distance and motor car speed front obstacle detection of motor vehicle operation object and the motor vehicle, display the distance through the digital display device, and is composed of a sound circuit according to the distance warning sound. So as to achieve the active prevention of downhole safety accident and reduce downhole accidents in essence.
Control System for Automatic Surface CNC Machining
Authors: Zhang Er Hong , Zhang Hua Long
Published: March 2015

CNC technology is mechanical movement with digital information and work process control technology, data processing is the reverse engineering of important technical aspects, which determines whether the subsequent model reconstruction process easy and accurate manner. In this paper, CNC machining complex surfaces feature full potential of existing CNC equipment, automatic control system designed to make CNC machining equipment to achieve higher processing speed, high precision machining, and CNC equipment in order to achieve high efficiency machining.
Study on Thermal Error Measurement Model of Small Precision Machine Tools
Authors: Xu Yang , Mao Jian , Chen De Jia
Published: March 2015

Taking the effect of geometric errors on machining accuracy into consideration in the design of small precision machine tools, the thermal errors become the main factor affecting the machining accuracy of machine tools. Currently, how to quickly and effectively evaluate the impact of thermal error on machining precision, in order to make effective thermal error prediction and compensation method, is needed to solve for small precision machining. Based on stepwise regression algorithm theory, combined with the DBB measured and analyzed on MATLAB in this paper, a better thermal error fitting regression formula is obtained. Meanwhile, this mathematical model approach is also applicable in a variety of other areas, such as machine tool thermal error analysis, compensation and testing etc.
Research Based on Reverse Engineering Technology of Complex Structure Product
Authors: Lin Ai Qin , He Yong Xi
Published: March 2015

Introduced reverse engineering technology and working principle. Researched reverse design process of the complex curved surface "spider". The data were collected by means of multiple scanning measuring with laser scanner. Used Geomagic Studio software for date point cloud processed of complex curved surface. Used UG software for surface reconstruction designed. Product reduction and improvement of the design were finished rapidly and high quality. Model of spider was printed with rapid prototyping technology. Compared with physical, the model’s reliability and accuracy were verified by reverse engineering design.Keywords: complex surface; reverse engineering technology; UG; Geomagic Studio software
Using the Trends of Evolution (TEs) from the Theory of Inventive Problem Solving (TRIZ) to Generate New Product Ideas for Optical Fiber Distribution Boxes
Authors: Ishi Rafael Yuji , de Carvalho Marco Aurélio
Published: March 2015

In this article, the Trends of Evolution (TEs) originated in the Theory of Inventive Problem Solving (TRIZ) are used for the generation of ideas for new products for the telecommunications infrastructure. Initially, the usage of TEs for ideation of new products is described. Then, a case study applying the TEs to an optical fiber distribution box, aiming to improve its usability, is presented. A number of promising new product ideas was generated in a structured way by professionals with no previous experience in using the TEs.
The Failure Analysis and the Innovative Design of Hammer Head on Hammer Crusher Based on TRIZ Theory
Authors: Wang Xin Qin
Published: March 2015

This article analyzes the failure modes associated with the issues of easy-wearing and short service-life of hammer head on hammer crusher under load condition. The key factor of wearing is identified. In applying the invention principle in TRIZ theory while considering the actual working conditions, technological solutions of modular hammer head and rotary hammer head are proposed. In these two solutions, the worn hammer bodies can be replaced quickly by the hammer heads while the hammer handles can be used repeatedly, achieving the goals of extending service-life, increasing the material utilization rate and reducing the repair cost.
The Simulation and Optimization on the Certain Type Fuel Pump Assembly Line Balance Based on Flexsim
Authors: Jia Hui Min , Yu Kai Chao , Zhang Jin Chang
Published: March 2015

This paper uses heuristic algorithm to makes balance about assembly line by analyzing the flow diagram of a certain type fuel pump assembly process and dividing assembly process into operation unit. Then, the result of production line balance is analyzed by using modeling and simulation of Flexsim software . Based on the above, this paper suggests the optimum control strategy which can provide the reference for enterprises to improve work efficiency.
Multi-Objective Optimization Algorithm for Job Shop Scheduling Problem in Discrete Manufacturing Enterprise
Authors: Liu Li Lan , Liu Xue Wei , Wang Sen , Zhou Wei , Zhao Gai Ping
Published: March 2015

Job Shop scheduling should satisfy the constraints of time, order and resource. To solve this NP-Hard problem, multi-optimization for job shop scheduling problem (JSSP) in discrete manufacturing plant is researched. Objective of JSSP in discrete manufacturing enterprise was analyzed, and production scheduling optimization model was constructed with the optimization goal of minimizing the bottleneck machines’ make-span and the total products’ tardiness; Then, Particle Swarm Optimization (PSO) algorithm was used to solve this model by the process-based encoding mode; To solve the premature convergence problem of PSO, advantages of Simulated Annealing (SA) algorithm, such as better global optimization performance, was integrated into PSO algorithm and a Hybrid PSO-SA Algorithm (HPSA) was proposed and the flowchart was presented; Then, this hybrid algorithm was applied in actual production scheduling of a discrete manufacturing enterprise. Finally, comparative analysis of HPSA/SA/PSO optimal methods and actual scheduling plan was carried out, which verify the result that the HPSA is effective and superiority.
Calculation and Analysis on Drag Torque of the Wet Clutch
Authors: Miao Li Ying , Cheng Xiu Sheng , Li Xue Song , Yang Li Chen
Published: March 2015

In order to study the drag torque characteristics of wet clutch, the drag torque with no groove friction plates and with radial groove friction plates were analysed separately, and the influence factors of the drag torque such as the lubricating oil temperature, the depth of the groove, the average gap between the friction plates were also discussed. Simulation was carried out in Matlab/Simulink,. Simulation results were compared with experiment results. This study may provide a reference for theoretical study and structural design of wet clutch.
An Ultrasonic Rayleigh Wave Transducer and its Application to Nondestructive Pressure Measurement
Authors: Ling Zhang Wei , Cai Wei Yong , Li Chao , Guo Wei Can
Published: March 2015

An ultrasonic Rayleigh wave transducer was designed for nondestructive pressure measurement in vessels. Using polyimide resin as the wedge material, the Rayleigh wave transducer had two piezoelectric elements which were placed in the same wedge with a certain distance. Variations in pressure and temperature of vessels can affect the velocity of ultrasonic waves, which will affect variations in time delay in receiving of the same Rayleigh wave with the two piezoelectric elements of the designed transducer. Based on the acoustoelasticity principle and considered the effect of temperature, a practical correlation model between the time delay and both the pressure and temperature of vessels was developed. Using an air vessel as a specimen, Rayleigh wave transducers were arranged in the axial direction of the vessel. The results of temperature experiments show that effect of changes in temperature on time delay agree with the theoretical results. With the calculation temperature compensation in pressure experiment, the relationship between the variations in the time delay caused by changes of pressure and the pressure is established. The pressure measurement results show that the measurement model is effective and the maximum absolute error is 0.09 MPa, which could be acceptable in engineering application.
Ultrasound Imaging Using Spatial Domain Phase Information
Authors: Yang Liu , Xu Chun Guang , Li Xin Liang , Huang Ye
Published: March 2015

The aim of this paper is to determine the efficacy of the ring-shaped array used for imaging the objects inside the array. Hyperbola algorithm and ellipse algorithm which are conventionally used in the field of guided wave for locating the defects are developed and combined here to extract the image. Meanwhile, much more phase information is added in this process. Fan-shaped ultrasound radiation is generated separately by the 45 rectangular ultrasonic transducers which are circular embedded in the wall of a container. The time of flight data and the attenuation data are obtained and stored in the A-scan wave of each receiving transducer, subsequently, they are applied for reconstructing the image of all tested objects. The validity of the combined measuring method with phase information is demonstrated by imaging the distributed polyurethane objects.
Review on Non-Destructive Testing Technique of Eddy Current Pulsed Thermography
Authors: Zhou Jian Min , Yang Jun , Wan Qi
Published: March 2015

This paper introduces the theory of eddy current pulsed thermography and expounds the research status of eddy current pulsed thermography in application and information extraction. Thermographic signal reconstruction, pulsed phase thermography, principal component analysis were introuduced in this paper and listed some fusion multiple methods to acquire information from infrared image. At last, it summarizes research progress, existing problem and deelopment of eddy current pulsed thermography.
Simulation of Depth Resolution for MFP Passive Detection
Authors: Luo Xin Yu , Han Qing Bang , Zhou De Fu , Li Jian , Yin Cheng , Fan Hong Hui , Zhu Chang Ping
Published: March 2015

In order to distinguish underwater targets, the method of target depth resolution urgently need to be developed. Matched field processing (MFP) is a passive detection method and it can be used to distinguish two targets at different depth. In this paper single vertical array MFP simulation has been done for targets depth resolution while they have same distance and azimuth in ocean acoustic field and the results show that the resolution is basically correspond to theoretical value.
Introduce the Quantitative Identification Method of Rolling Bearing in the Application of Fault Detection
Authors: Huo Li
Published: March 2015

Rolling bearing is an important part of rotating machinery. Its failure will directly affect the normal operation of the whole machinery. This study proposed an intelligent diagnosis model based on Fuzzy support vector description for the quantitative identification of bearing fault. The proposed model constructs the spherically shaped decision boundary by training the features of normal bearing data, and then calculates the fuzzy monitoring coefficient to identify the bearing damage.
Mixed Measurement Form System Base on State Estimation on SCADA/PMU
Authors: Xie Yi Bing , Ge Yu Jie , Sun Ting Ting
Published: March 2015

The state estimation based on the synchronous phasor measuring unit (PMU) is the wide-area measurement system (WAMS) of important technical support, It is great to real-time monitoring of large area power grid control direction and provides advanced information technology platform. it provides advanced information technology platform for real-time monitoring of large area power grid and control direction, but the current wide-area measurement system less point, difficult to direct the system state estimation. This paper proposes a method based on PMU and SCADA mixed measurement state estimation. The simulation results show that this method has a higher convergence speed, And from the topology of the network structure of the restrictions.
Monitoring System of Status of Traction Plate and Pulley in Stringing Construction
Authors: He Yuan , Zheng Si Guo , Liu Gang
Published: March 2015

In the air-lines construction, the major project problems performance: the inclination angle of cable traction plate can’t remain stable; cable often jump or drop off pulley groove in stringing process. As the position of traction plate and pulley is beyond the view of workers, workers are unable to monitor their operational status in real time, which influences the efficiency of construction seriously. This paper presents a set of intelligent video surveillance system based on wireless network. The system can capture video and angle data, then these data is transferred to ground through the wireless network. Receiving terminal is designed based on C # and Java language respectively. Video and angle data can be displayed on PC and mobile phone. Practice has proven that this system is: high real-time, clear pictures, far transmission distance and easy to carry. It improves the efficiency of construction greatly.
Design of Wireless Temperature Measurement System for Chicken Hatch Field Based on LabVIEW
Authors: Mo Jiao , Liu Ming Zhe , Yang Jian Bo , Wang Xu
Published: March 2015

Aiming at the influence of temperature on the rate of chicken’s hatchability in hatch field, this paper uses a flexible wireless VISA communication technology based on LabVIEW to measure and control the temperature in process of chicken hatching. The hardware part was composed of microcontroller C8051F530, digital temperature sensor DS18B20, wireless data transmission module nRF and display module HB240128 for real-time acquisition and processing of temperature data. The software part was written by graphical programming software LabVIEW, and used it to design system interface for functions of real-time processing of temperature data, waveform display, threshold alarm etc. The system can be implemented by hardware circuit itself and computer system interface for the temperature control, which enhanced flexibility of the system and was conducive to troubleshoot interference problems. The test results show that the temperature measurement system was characterized by simple operation, easy maintenance, steady performance and high accuracy.
Goaf Temperature Monitoring System Based on ZigBee Revised Routing Algorithm
Authors: Huang Meng Tao , Lei Xiao Fei
Published: March 2015

In the process of coal-mine production, the self-ignition of left coal in goaf area has always been major disasters, and spawns amount of economic loss. As a consequence, it is necessary and essential to monitor the self-ignition of left coal in goaf. In consideration of the complex and poor environment of the goaf area, this thesis adopts ZigBee wireless sensor network instead of traditional fixed cable sensor network to monitor the self-ignition of coal goaf area. It has the advantages of wild covering, convenient layout and easy adapting to environment. In addition, counting on the revised routing algorithm, the whole wireless sensor network has obvious advantages of its network performance and low consumption, which makes the whole system monitor the self-ignition of left coal steadily and permanently.
Modal Analysis of Gantry in Axle Multi-Parameter Measurement System
Authors: Duan Jie , Liu Yu Tong , Cao Wei Guo
Published: March 2015

As the key part of EMU axle measurement system , the gantry, which carrying on high-precision sensors,its vibration frequency generated by the external excitation has an important influence on measurement accuracy, so the analysis about gantry’s natural frequency and model shapes. This paper describes the finite element modal analysis theory briefly , establishes analysis model structure of gantry by ABAQUS, obtains each vibration mode shapes and its corresponding natural frequency through the analysis for model. Finally, we figure out the frequency range that the external excitation should avoid. Meanwhile, a method that decreases external influence by using an independent foundation and air mounts is proposed. This work lays a solid foundation of large-size and high-precision EMU axle measurement.
Error Analysis and Algorithm Validation of Geomagnetic Sensor
Authors: Wang Yong , Zhang Jian Yun , Zhang David Wei
Published: March 2015

Based on the fundamental principle of magnetic compass, the effect of interference and sensor errors on the magnetic azimuth measurement accuracy are analyzed. In order to eliminate the influence of geomagnetic sensor system error interference sources effectively, the paper puts forward a method of obtaining accurate heading angle and azimuth of magnetic compass, which is realized by converting magnetic components in the space coordinates to horizontal coordinate as well as adding an algorithm of eliminating carrier interference and software filter. The test of application system shows that data errors are greatly reduced after adding the anti-interference algorithm. The system testing errors is almost equal with Xiaomi phone at the same condition. It proves that this system is applicable to general navigation field.
The Power Cable Online Monitor and Protect in Application System
Authors: Lai Wen Qin , Yang Zhi Hua , Liu Chun Yu
Published: March 2015

】 The solution of power optical cable online monitoring and cable protection equipment roasted the perfect combination of applications,which can be solved for fiber optic cable line protection, fault location and reduce equipment loss, improve security. Through optical protection equipment improvement, it can increase light protected internal OTDR monitoring channel to achieve the protection of optical communication services and the safeguard of the route line monitoring standby position, and the loss from the original equipment involved 7dB down 3dB, which effectively improve safety and quality of electric power communication optical fiber communication network, and improve management of power optical fiber communication network.
Research of Infrared Electro Optical System’s Operating Range on Hypersonic Vehicle
Authors: Zhou Jin Wei , Shi Zhi Guang , Li Ji Cheng , Lu Xin Ping , Lu Xiao Wei
Published: March 2015

The operating range of ground-based detector on hypersonic vehicle in rarefied atmosphere space is researched. Both the imaging dispersion and the difference of radiation intensity between object and background are considered, and a new model of operating range is proposed. By experiments, the dispersion coefficient changes with the distance between object and detector and has great effect on operating range; meanwhile, the higher the velocity of vehicle is, the further the operating range is. And the detector working at medium wave infrared has larger operating range. Compared with existing method, the proposed algorithm achieves better result in the field experiment.
Soft Measurement of the Cell Concentration Based on SVM
Authors: Meng Hua , Gao Hui , Zhao Bo Yang
Published: March 2015

The process of Pichia pastoris fermentation has a long period and less offline data . The cell concentration and some other important variables can not be measured on line.The soft sensor modeling at present is mainly the artificial neural network (ANN).This paper introduces the Support Vector Machine (SVM). Select fewer off line data and establish soft sensor modeling about cell concentration.Compared with the BP neural network prediction model, Simulation experiment proves that the support vector machine has better prediction effect and generalization ability. template.
An Integrated Method for XRII Image Distortion Correction
Authors: Li Yuan Jin , Shu Hua Zhong , Wang Tao , Wang Yang , Kong You Yong
Published: March 2015

The distorted X-Ray Image Intensifier (XRII) image can introduce negative effect on following work for C-arm CT imaging system. In this paper, we propose an integrated approach based on least squares and Biharmonic spline interpolation to correct geometric distortions of XRII images. The method first uses morphology operation to extract the coordinate values of control points. Then the least square method fits the extracted coordinate values in every row and computes the more coordinate values by fixing the length in every row. Finally, The Biharmonic spline interpolation is used to interpolate the all coordinate values and correct the distortional XRII image. The experiment shows that the integrated method can effectively correct the distorted XRII image.