bluuebunny/crossref_metadata_2025 huggingface dataset:
Based on Monocular Vision of the Robot Coordinate for Grinding Surface within the Establishment
Authors: Wang Hua , Gao Jin Gang , Zhang Shuang , Wang Wen Zhong , Yu Lei
Published: September 2011

Using industrial robot system for grinding surface is a higher surface processing quality effective means. In order to obtain the three-dimensional coordinates on the machined surface, this paper firstly use a monocular camera and a word to construct a set of line lasers to obtain the visual acquisition system for processing surface grinding robots the sequence laser line picture. Then according to the characteristics of laser line, using the least squares method of parabolic fitting for each picture of the center of laser lines extracted. Continuous laser line of existence, this paper puts forward the cubic b-spline curve of each picture of the algorithm generated between it and break a smooth and continuous curve. Finally, stitch the intensity information of the laser line in every picture together. It builds a complete robot coordinate for processing surface within the 3-d information pictures, by it we can make the robot trajectory and speed planned. This article applied a large number of experimental proofs, and used robot grinding surface technique above to robot grinding test, satisfy the precision requirement of experiment, the introduction of the method is practicable and effective.
A Project-Driven E-Design System for Product Development Process Modeling
Authors: Fu Lei Jie , Jiang Ping Yu
Published: September 2011

Product development process modeling (PDPM) is one of the key techniques for product development (PD). The main aim of PDPM is to provide a product design chain (PDC) for PD. To increase the efficiency of PDPM, a project-driven e-design system is proposed in this paper. There are two modules in the system: task decomposition and product design chain construction. Additionally, key techniques for enabling the system are discussed. Finally, an example of steering oil pump design project is studied to demonstrate the system.
Classification Decision of Mechanical Drive Types Using LVQ Neural Classifier in Conceptual Design
Authors: Bo Rui Feng
Published: September 2011

In conceptual design of mechanical system, selecting an appropriate mechanical drive type that meets design requirements is a critical problem. To tackle it, a novel classification decision approach to drive type selection is presented, which employs LVQ neural network as classifier to recognize a satisfactory drive from a range of drive types. This recognition process includes five stages: (1) capturing linguistic expression values of character factor for typical drives; (2) digitizing linguistic expression values and extracting features of drives; (3) constructing the structure of a LVQ neural network; (4) training this network with the feature data of character factor set; (5) identifying an appropriate drive type according to the input data using the trained neural network. This proposed approach capitalizes on the benefits of LVQ neural network to acquire domain knowledge and implement classification and decision. Hence at some extent the process of conceptual design can be simplified and the rationality of the decision can be greatly improved.
Water Lubricated Bearing Lubrication Model Based on Multilayer Gridding
Authors: Peng Jin Min , Yu Jiang Bo
Published: September 2011

The principle of the multilayer gridding algorithm, as well as its applications to the numerical calculation of water lubricated plastic alloy bearing elastohydrodynamic lubrication (EHL), was described. The computation of water lubricated plastic alloy bearing EHL was carried out by the numerical model based on the linear contact theory. A cuneiform water film on the frictional surface between bearing and spindle is formed because the plastic alloy has a high elasticity and low elastic modulus, which lead the water lubricated bearing easy to be distorted.
Research on Optimization and Decision Making Methodology in Technology Design of Coal Mine Refuge Chamber
Authors: Huang Xing Ling , Huang Xiang Bing , Dong Yun Fei
Published: September 2011

In this paper, an effective optimization and decision making method was proposed to deal with the multiple attribute decision making problems in technology design of coal mine refuge chamber. It is more reasonable that both attributes’ subject weights assessed by experts (DMs) and intrinsic weights inside the alternatives are taken into account. The main factors, which affected DMs’ decision making, were analyzed and subdivided to 14 elements, and then a MADM model for chamber design was introduced subsequently. A case was studied to demonstrate the application of the model, and the results show that the chamber’s capability of withstanding overpressure, temperature control, flexibility and investment cost are crucial elements which are connected with the product’s superiority and should be paid more attention in technology design.
Nondestructive Testing and Evaluation of a Diseased Highway Bridge
Authors: Zhao Shun Bo , Pei Song Wei , Chen Ji Hao , Liang Xi Jian
Published: September 2011

This paper introduces the detection and evaluation results of a diseased highway bridge using nondestructive testing method according to Chinese specification. The bridge was firstly inspected to judge the apparent diseases of deck pavement and upper stuructures. The end-span prestressed concrete hollow slabs were detected by nondestructive testing for rebound strength and carbonation depth of concrete, corrosion and concrete cover of prestressed bars and cracks at bottom surface of the slabs. The synthetic judgement is given out based on the inspecting and testing results. Some measures are proposed for strengthening the bridge such as bonding steel plates and carbon fiber reinforced polymer laminates on the bottom surface of diseased slabs, recasting concrete of slab joints and renewing asphalt concrete of deck pavement.
Research on the Correspondence of Product Symbol and User Image
Authors: Chen Li Na , Guo Min Ying
Published: September 2011

Based on existing study on image and symbol, two new concepts are proposed, user image and product symbol for design field. The process of establishing images of users and the influence factors on them were described. How to use the product symbolic form, content, sort to design were also illustrated. On the basis of the above theories, the research laid emphasis on how to make designers construct effectively the corresponding relationship of product symbol and user image and to apply the correspondence to design. It is demonstrated with an example, how to use the process of the new user images which is based on oriented product symbols to design.
Dynamic Analysis of a New Coaxial Indexing Cam Mechanism
Authors: Chen Guang Jie , Yang Yu Hu , Shen Zhao Guang
Published: September 2011

Double crank indexing cam mechanism is a coaxial layout of the new sub-degree institutions. In comparison with the conventional indexing cam mechanism, the double crank indexing cam mechanism has a more compact structure due to the coaxial input/output arrangement, and enables more stops to be produced at the same input speed. This paper introduces a dynamic model of the cam system by taking this mechanism as research object, and makes systematic analysis about the constrained forces of the new mechanism. On that basis, the effectiveness of the approach is validated by the examples. The results of the study provide important theoretical foundation for the working of this new mechanism.
Kinematic and Singularity Analysis of a Novel 4-DOF Parallel Manipulator
Authors: Guan Meng , Song Yi Min , Sun Tao , Dong Gang
Published: September 2011

This paper presents a novel 4-DOF (Degree of Freedom) parallel manipulator called 2-PSS&(2-PRR)R manipulator. Firstly, the architecture of this manipulator is described and the mobility is analyzed via screw theory. Secondly, the inverse kinematic analysis including position analysis and velocity analysis is performed. Finally, the Jacobian matrix is obtained through velocity analysis, and then three kinds of singularity configurations are observed in virtue of the Jacobian matrix. This paper lays the foundation for further research of this manipulator.
Research on an Integrated Plastics Product Design Method
Authors: Hsiung Wei , Young Song , Xie Zhi Bin
Published: September 2011

With continuous development of macromolecule technology and great invention of advanced materials with high quality, plastic parts are widely applied in the areas like aerospace, mechanism and medical instruments. However, the design methods of plastics are still restricted in many aspects. This paper proposes an integrated method for plastic product design, which has been demonstrated by a case study as feasible and effective.
Design Analysis in Frictional Fan Clutch Driven by SMA Spring
Authors: Ma Jian Zuo , Liu Peng Wei
Published: September 2011

This paper presents a fan clutch driven by SMA spring actuator. Based on shape memory effect of SMA, the operational principle of the fan clutch driven by SMA is introduced. The equation of the output displacement of SMA actuator in free stroke is derived. The normal pressure between driving and driven discs of the clutch generated by SMA actuators is analyzed to compute the torque transmission ability in the disc-type fan clutch. The characteristic of transmission torque is studied in detail. The results indicate that the change of temperatures has a tremendous influence on the normal pressure between driving and driven discs of the fan clutch, and the transmission torque of the fan clutch changes rapidly according to the temperatures of airflow from radiator.
Development of Test Rig for High-Speed Railway Rolling Bearings
Authors: Huang Zhao Dong , Fan Bo Qian , Ouyang Xiao Ping , Xu Ling Ling , Wang Zhi Gang
Published: September 2011

The rolling bearing test rig for heavy vehicles often works under heavy load and high speed, thus it requires high performance for the main shaft and mechanical structure. In this paper a design of test rig for high-speed railway rolling bearings is presented, in which a new structure is adopted to reduce the load on the support bearings. The basic idea is to position the load in a way that they can be balanced by each other.
Research of Molecular Distillation Based on Intelligent Logic Control
Authors: Li Hui , Shi Nan , Li Ying
Published: September 2011

In accordance with the feature of non-linear and time varying for parameters that in the process of molecular distillation extract fructus schisandrae, intelligent logic control algorithm for temperature control in molecular distillation was proposed. The temperature deviation of molecular distillation and its deviation variety rates was applied as a feedback signal, the intelligent logic control rule was established. The test results show that the control of temperature for wiped film type molecular distiller with the method of this paper is simple, practical, and the control accuracy is improved, can very well solve the temperature control in molecular distillation.
On-Line Monitoring of Yogurt Fermentation Using Acoustic Impedance Method
Authors: Meng Rui Feng , Zhou Jian Wei , Ye Xing Qian , Liu Dong Hong
Published: September 2011

A non-contact ultrasonic system to monitor the yogurt fermentation process through a stainless steel reactor wall is described. During the process, the acoustic impedance was determined by using multiple reflections of ultrasound within the stainless steel wall. Thus, the wall was part of the measurement system. By basing on measurement multiple reflections, the instrument sensitivity is increased by the power of the reflection coefficient. Experimental results show that the acoustic impedance changes continuously while pH declines. It is very useful, especially on production scale for yogurt that the acoustic impedance measurement does not demand a liquid transparent to ultrasound. Also, this noncontact sensing method can reduce the risk of food contamination from measuring instrument, and contribute to hygienization for food manufacture industries.
Research on the SM-Pool Framework for Part Information Sharing
Authors: Song Li Wei , Ji Yang Jian , Qi Guo Ning , Zhang Yong
Published: September 2011

In today’s information age, the information sharing issues are widespread concerned by academia and manufacturing industry. For improving part information sharing, many researches on Part Library (Plib) have been carried out in machinery manufacturing industry. The international standard organization (ISO) has drawn the related standard for part library and recommended the so-called SM dictionary for describing parts’ properties. In this paper, a SM-Pool framework is proposed for providing the SM class information used by SML technology. The core mechanisms and service interfaces of information sharing technology are discussed, and a prototype software system has been developed for verifying the proposed framework.
Analysis of Centralized Aircraft Deicing Process
Authors: Wu Meng Li , Chen Bin , Xing Zhi Wei
Published: September 2011

This paper established a mathematical model for the centralized aircraft ground deicing processes which includes preparation, deicing operations and release after the deicing. To ensure the safety of aircraft, the proposed model has taken into account the constraint that the total time of deicing processes shall be less than the retention time of the deicing fluid so as to avoid secondary icing hazards. The proposed model has been verified through numerical simulations, where a first-come-first-service scheduling scheme is assumed. Simulation results show that the proposed model matches the current status of airport deicing very well.
Application of Radial Basis Function Networks Combined with Genetic Algorithm in Predicting the Geometric Parameters of Drawbead
Authors: Chen Jie Lai , Jiang Da Zhi , Huang Ya Yan
Published: September 2011

The drawbead plays a very important role in automobile covering part forming processes. Traditional drawbead design mainly depends on designers’ experience. In order to obtain proper restraining force during die try-out, it is often necessary to adjust the drawbead through a very complicated procedure. It is thus meaningful to study the relationship between the parameters used to reflect metal forming effects and the geometric parameters of drawbead and then create a prediction model for them. This paper employs the radial basis function neural network technology to predict the geometric parameters of drawbead used in forming processes, where the genetic algorithm is used to optimize the neural network structure. Simulation results show that the proposed approach outperforms the curve fitting method.
Rapid Tuning Method of PID Parameters for AC Servo Control System Based on PMAC
Authors: Wang Gui Ying , Cao Jun , Liu Yong Chun
Published: September 2011

This paper introduces the structure and working principle of AC servo control system based on programmable multi-axis controller (PMAC). The configurations and parameter tuning method for PMAC PID filters are discussed. It has been shown that, by combining feed-forward control and feed-back control together, the robustness and stability of the servo control system can be improved and the servo tracking error can be minimized if the controller parameters are tuned properly.
Decision Method of Equipment Reliability Assurance Based on Multi-Level Management
Authors: Hou Zhi
Published: September 2011

This paper classifies reliability assurance management strategies into four modes, i.e., reactive mode, preventive mode, predictive mode and proactive mode, advanced a decision method of equipment reliability assurance based on multilevel management. The risks of equipment failures are also categorized into four levels according to their degrees of severity and occurring rates. In order to improve pertinence and reduce cost of reliability assurance, it is proposed to adopt a multi-level management strategy in handling the risks. For this purpose, a model for relationship between risk levels and reliability assurance modes, a model for equipment reliability assurance cost and a model for equipment risk increments after reliability assurance have been established. The applied risk management mode for each concrete risk is determined by minimizing the total reliability assurance cost with risk increment serving as a constraint condition. The proposed approach has been demonstrated by using an example.
Condition Feature Extraction of Machine Tools Based on Wavelet Packet Energy Spectrum Analysis and Bispectrum Analysis of Current Signal
Authors: Fang Teng Fei , Li Guo Fu
Published: September 2011

Based on the study of the characteristics of load current signal, this article develops a method to extract features that can be use to distinguish the different working status of machine tools in real-time manner. The features are extracted from wavelet packet energy spectrum and bispectrum of the load current signal, and thus can take advantages of both wavelet packet transforms and bispectrum in signal analysis. Experimental results show that, compared with the features extracted from wavelet packet energy spectrum or bispectrum alone, the features extracted by applying the proposed method can provide better performance in term of identifying the machine working status.
Research on the Production Load Rate of Suppliers in Order Allocation
Authors: Liu Fu Lei , Ye Fei Fan , Li Guo Fu , Liu Lan Lan
Published: September 2011

As for the information need of the supplier production status in order allocation, parameter of production load rate was introduced to represent the status within the order delivery time. Analysis on the characteristics of the production load rate was made at first after its definition was given. Then after a key resource collection was built based on the key process of production, together with introduction of the algorithm of the load as far as the key resource collection and different scheduling modes are concerned, the calculation model of the supplier production load rate was built. Furthermore, the practicability of the algorithm was illustrated by the example.
Study on Design of Welding-Joint and Structure of Welding Based on Ultrasonic Welding Technology
Authors: Huang Yi Jun
Published: September 2011

Ultrasonic welding is the application of high-technology for welding thermoplastic products. Various thermoplastic parts can be treated by ultrasonic welding without adding any solvent, adhesive or other auxiliaries, which can increase productivity many times, reduce cost and improve the quality of products. Ultrasonic welding technology is being used widely. This article focuses on the application of ultrasonic welding technology, and has a detailed statement of the design of welding spot by using ultrasonic welding technology, the welding structure, the design requirement for ultrasonic welding, and the ultrasonic welding process.
FEM Simulation and Optimization of Process Parameters for Tube Hydroforming
Authors: Chen Cheng Zhan , Gan Yi , Du Ji Tao , Huang Can , Chen Qi Jun
Published: September 2011

The finite element software DYNAFORM was applied to simulate the whole tube hydroforming process. Two main failure types in the process of hydroforming are wrinkling and bursting. The strain distribution and thickness distribution at different process parameters were presented. Not only friction coefficient but also the effect of different matching of internal pressure and axial force was simulated and analyzed. In addition, the velocity of punch was considered too. The result has reference value for the variable cross-section tube hydroforming process research.
Preparation and Characterization of Magnetic Functional Hybrid Particles
Authors: Wen Hui Ying , Fang Hai Feng , Xiao Shen Ling
Published: September 2011

Hybrid microspheres with a polystyrene core coated with magnetite nanoparticles were prepared by two techniques. Firstly, monodispersed functional polystyrene latex particles were prepared by emulsion polymerization. In a general way chemical groups may be introduced through polymerizable surfactant or functional monomer. Magnetite acidic or alkaline sol was added in, then magnetite nanoparticles were absorbed onto latex particles by electrostatic attraction and core-shell composite particles were formed. Secondly, core-shell composite particles were prepared by miniemulsion polymerization. To modify the tendency of conglomeration of magnetite and increase the amount of magnetic particles onto the composite particles, silane coupling agent MPS was used as surface modification agent for magnetite. A series of different size and coating morphology magnetic hybrid particles were prepared through the adjustment of some experiment parameters. The obtained functional core-shell particles were characterized by FTIR, TEM, etc.
Influence of Multiple Piezoelectric Effects on Piezoelectric Coefficient of Piezoelectric Ceramics
Authors: Zhang Zhong Hua , Cheng Guang Ming , Kan Jun Wu , Zeng Ping , Wen Jian Ming
Published: September 2011

In this paper, theoretical analysis is performed on the influence of multiple piezoelectric effects on piezoelectric coefficients. And a kind of classical piezoelectric ceramics was adopted to conduct the experimental validation. The experimental results of short-circuit boundary condition are obtained by the methods that a capacitor whose capacitance is much larger than that of the stack is parallel with PZT-5. Influence results are obtained through comparing them with open-circuit piezoelectric coefficient. Experimental result shows that multiple piezoelectric effects make piezoelectric coefficient of PZT-5 be altered by 18%.
Determination of Optimal Temperature for Defect-Free Casting of Aluminium in the LP-LFC Process
Authors: Li Ji Qiang , Zhao Zhong , Fan Zi Tian , Jia Zhi Xin , Liu Wen , Liu Li Jun
Published: September 2011

Fluidity of ZL101 aluminium alloys in the low-pressure lost foam casting (LP-LFC) process has been investigated by altering various temperature variables. The experimental results indicate that the LP-LFC process had fine fluidity, and the pouring temperature was lower than conventional lost foam casting. The effect of the metal temperature on the fluidity is marginal in the LP-LFC process. Excessive pouring temperature not only aggrandizes energy consumption but also deteriorates porosity defect. The success of casting cooling fin demonstrates the advantages of LP-EPC process in producing high-complicated castings.
Edge Design for Regrinding Cutting Tool
Authors: Tian Xin Li , Wang Hao , Tang Xiu Jian , Li Zhao , Yu Ai Bing
Published: September 2011

Regrinding of wasted cutting tools can recycle resources and decrease manufacturing costs. Influence of relative tool sharpness and tool cutting edge angle on tool edge radius were analyzed. Cutting force and cutting temperature were simulated with FEM on different edge radius. Edge preparation experiments were carried out though an abrasive nylon brushing method. The results show that RTS and cutting edge angle have influence on edge radius. Small edge radius might result in small cutting forces and lower average temperatures, could maintain the cutting state between tool and workpiece. The cutting edge defects can be eliminated through edge preparation, and a smooth cutting edge can be obtained. Cutting tool life will be improved through proper edge design and edge preparation.
Relationship between the Grit Cut Depth and Process Parameters in Electroplated Diamond Wire Sawing KDP Crystal
Authors: Gao Yu Fei , Ge Pei Qi
Published: September 2011

A wire-saw cut KDP crystal geometrical model was founded and a mathematical model was established to calculate the grit average cut depth, based on indentation fracture mechanics theory(IFMT). The relationship between the grit cut depth and wire saw process parameter was analyzed theoretically. The research results indicate that there exists an approximate monotone increasing non-linear correlation between grit average cut depth and the ratio i value of crystal feed speed and wire speed. By increasing the wire speed and crystal feed speed accordantly, the value of i can be maintained invariable, however, this way can simultaneously bring higher machined surface quality and machining efficiency.
Analysis of the Factors that Influenced on Team Creativity in Product Conception Design Stage
Authors: Yang Song , Zhong Ying
Published: September 2011

Now, the application of team is wider and wider, the studies about team are more and more. If a team can always maintain high design creativity, its advantage in the industry can last forever. In the industrial design activity, product design preliminary stage is the major part of creating process. Management of team makes it carry out the design effectively. Especially, the management of team creativity is crucial to team members, it makes team members keep efficient creativity and improve the team's kernel competitive power. This study discussed the industrial design team creativity in this particular field, summarized team’s responsibilities and factors that influenced on team creativity in product conception design stage. Team managers need to optimize and ameliorate these factors, and then they can further improve the design team creativity.
Heat Cutting for Remanufacture Hardness Deposited Materials
Authors: Wu Zhi Yuan , Shi Xiao Jun , Tian Xin Li , Tang Xiu Jian , Zhang Shu
Published: September 2011

Three cutting tools, YG610, Si3N4 ceramic tool and CBN were adopted for heat cutting deposited materials. The test results show that though the impacts to the tools reducing, the CBN still break seriously. The condition by Si3N4 ceramic tool is better than CBN, whose types of tool failure change from breakage to wear. The YG610 is best material for heat cutting, whose minimum VB value is only 0.3mm. In the experiment, the wear increase with the increasing of heating temperature, cutting speed, cutting depth. But it decreased with feed rate. The analysis results show that the red-hardness is most importance factor for wears of YG610.
Study of the Influence of Polymer Properties on Injected Parts and the Controlling Means
Authors: Li Hong Lin , Jia Zhi Xin
Published: September 2011

At present, the trends for injection molding are higher precision, ultra-thin and light weight, and there are many harsh requirements on injected parts. For the parts manufactured by injection molding, crystallization and orientation of polymer affect the properties of the parts greatly. Crystallization and orientation affect the physical and chemical properties of the injected part, such as strength, stiffness, impact resistance, erosion resistance and so on. According to their formation mechanism, this paper presents the layout and dimensions of the coolant lines, the position, shape and dimensions of the gate, and the injection pressure etc., which play an important role for controlling the degree of crystallization and the direction and degree of orientation.
Temperature Compensation of Long Period Fiber Grating with Negative Strain Coefficient
Authors: Wang Wei , Zhang Bao Ju , Yin Xiao Hui
Published: September 2011

A passive temperature-compensating package of Long Period Fiber Grating (LPFG) was designed based on its negative strain coefficient. LPFG was pasted on the substrate material, such as copper and Plexiglas, under tension. The strain induced by the thermal expansion of substrate material was used for temperature compensating .The experimental results showed that the mounted grating on copper exhibited lower temperature sensitivity (about 78pm/°C), compared with uncompensated grating(about 118pm/°C). But the transmission spectrum waveform of the mounted grating on Plexiglas changed. It was demonstrated that this package could improve the wavelength stability of LPFG when appropriated substrate material was chosen.
Testing and Analysis of High-Speed Camera for Pulse MIG/MAG Welding Droplet Transition
Authors: Wen Yuan Mei , Huang Shi Sheng , Liu Gui Xiong
Published: September 2011

The droplet transition of electrical arc welding is a complicated process that combines heat, mass and momentum transfer. A high-speed camera system with laser in the background is established to observe the fast changing process of droplet transition. A group of high-speed camera pictures which indicate that the size and shape of droplet have strong uncertainty are taken and analyzed. The results show that the randomness of droplet size and shape are decided by its internal and external random factors, such as: the changing of the length of welding wire stretched out, the fluctuation of the feed speed of welding wire etc.
Measurement for Naked-Eye-Stereoscopic Display Vision Character
Authors: Liang Fa Yun , Wang Jing , Liang Fa Zhou , Niu Jin Xia , Chen Jie , Zhang Hua , Chen Hai Chu , Zhang Rui Hua , Xiong Gen Liang
Published: September 2011

Naked-eye-stereoscopic display is a human-machine complex system based on human being’s stereo vision, it shows parallax images on sub-screens and forms individual view zones to realize 3D vision. According to the optic mechanism , we use “Stereo Degree” to measure 3D optic parameter, then stereoscopic display vision character is described.
New Target 3D Pose Determination Method Based on Straight Line Character
Authors: Xie Yu Chan , Li Zhi Gang , Lin Yu Chi
Published: September 2011

A new pose determination method is presented, in which the ground bound is needed together with target body’s accurate geometric characters. Compared with traditional location method, the proposed way utilizes target’s straight line character to match with its model’s on the ground, by which to represent the variation of object attitude. Location result can be seen on the image. The method makes the location process independent on the attitude estimation with high intelligent and simple system.Experimental results show that the proposed algorithm can locate the target accurately and achieve pose visualization.
A Method Based on Two Constraints for Camera Calibration Interior Parameters
Authors: Du Ye Fei , Dong Ming Li , Wang Jun , Sun Peng
Published: September 2011

In the digital photogrammetry system, camera calibration is an essential part and its accuracy directly affects system accuracy. Because non-metric digital camera interior parameters are the stationary in the measurement process, the camera interior parameters should be accurately calibrated in the laboratory. Considering the lack of general DLT algorithm, we adopt nonlinear model of the camera based on distortion. And two additional constraints are used to accurately calibrate the parameters of the camera. The experimental results are analyzed and compared with the V-STARS system. The results of interior parameters calibration are less than 1 pixel. Test results meet the requirements of industrial digital photogrammetry.
The Numerical Simulation and Experiment Research for Measurement of Error Vector Magnitude (EVM)
Authors: Fang Hong , Bian Xin , Zhou Xin , Liu Ke
Published: September 2011

Wireless communications is one of the main industrial areas that require metrological support. However, Error Vector Magnitude (EVM), which is one of most important parameters used to define the performance of wireless communications equipment qualitatively, is facing some difficulties in making traceable measurement. In order to research the effect of all factors on the measurement of EVM, accurately characterize the EVM of a number of different signal generators thereby breaking the link between generator and receiver EVM, and aim at establishing a low uncertainty, traceable EVM measurement capability, we need to built many kinds of analysis platform, and let their results compare with each other for verifying their correctness and accuracy. In this paper, we presented theory method, numerical simulation, and experiment platform to calculate or measure EVM and comparing the results with each other. Using these analysis platforms, we mainly analyzed the effect of IQ impairments of modulator on the EVM.
Application of the Mine Multi-Wave Seismograph in the Measurement of Coal Seam Washout Zone
Authors: Hu Yun Bing , Wu Yan Qing , Kang Hou Qing , Fu Guo Hong
Published: September 2011

In order to avoid the useless tunneling and the low mining rate, the mine seismograph measurement new technology is applied to measure the coal seam washout zone with long distance and high resolution. Based on the analyzing geophysics characteristic of the coal seam washout zone, this paper investigates the characteristics of time-distance curve of the measurement technology, and studies the application example of detecting the development and boundary scope of the old river-seam coal seam washout zone long-distance ahead of tunnel. The result shows that the measurement of the development and the boundary scope of the coal seam washout zone by using the mine multi-wave seismograph meet the practical requirement with small error and being consistent with the actual conditions during the process of mining.
Spiral Flow Capability Research in the Rotary Cylinder
Authors: Li Song Bai , Liu Yi Lun
Published: September 2011

In order to obtain the lubricating capabilityof screw rotary cylinder, its structural design and operation principle were introduced. Seven screw pairs with different radial clearance were designed. The models were built by Pro/E. Structure mesh was generated by using Gambit. Based on laminar flow model and SIMPLE algorithm, the interior flow field in different radial clearances and the same radial clearance at different inlet pressure were numerically simulated and analyzed with Fluent. The relationship of loading force, stiffness, maximum temperature, flow rate and radial clearance were obtained. Simulation results show that the performance of oil lubricated screw pair is the best at the radial clearance of 0.10 mm. At the same radial clearance, when back pressure is constant, with inlet pressure increasing, loading force, stiffness, flow rate and maximum temperature increase completely.
The Corresponding Numerical Analysis of Dike Typical Diseases and Electrolog Data
Authors: Zhang Qing Ming , Xu Shuai , Leng Yuan Bao
Published: September 2011

Dike is an important component of Yellow River flood control system, but its security situation is not optimistic. High-density electrical method is an effective mean of dike typical diseases detection, we use steady-state current transfer analysis of software ANSYS to establish the numerical simulation model to analyze the detection resolution effects of dike typical diseases depth and scale changes on different detection devices of high-density electrical method, establish the correspondence of dike typical disease and electrolog data.
CFD Study on the Flow Characteristics in Filleted Microchannels
Authors: Yan Hong Jie , Zhou Ping , Xu Ze Lin , Chen Zhuo , Mo Jing Wen
Published: September 2011

The flow characteristics of water in filleted microchannels were simulated based on CFD method. The flow pressure drop at different aspect ratioandRenumber were rearranged on the simulating results with laminar flow model. The results indicated that the pressure drop enlarges with the increase of in the case of the constant width of the microchannel. Within the range ofRenumber of interest, Poiseuille number of the flow is constant for differentRe, but decreases with increasing aspect ratio. An equation was fitted to describe the relationship betweenPonumber and aspect ratio, i.e. .
An Evaluation Method of Roundness Error Based on Artificial Bee Colony Algorithm
Authors: Wu Xin Jie , Hao Duo , Fu Rong Rong , Xu Chao
Published: September 2011

The roundness error is an important index of mechanical part and its interchangeability, it is the key to quality of product. A new method for calculating the roundness error based on artificial bee colony algorithm has been proposed in this paper. Artificial bee colony algorithm is an evolutionary computation. It has the character of simple technique, easy digital realization and few controlling parameters. Firstly, the basic principle of artificial bee colony algorithm is concisely introduced in this paper. The detailed steps for calculating the roundness error based on artificial bee colony algorithm have been described. Finally experiment results are given. These results have shown that the proposed method can correctly and effectively evaluate roundness error. The proposed method can overcome the local convergence in evaluation of roundness error based on least square method (LSM).
Ontology Construction on ISO 286 Fit
Authors: Meng Hao , Zhong Yan Ru , Ji Liu Jing , Xia Xue
Published: September 2011

It directly affects the functions and economic benefits of products to choose a fit of geometric product components. In order to meet these functions, save the costs and share the information passing during the entire life cycle of products, this paper constructs a priority fit ontology which refers to ISO 286 and the new generation of GPS. Concepts are extracted from the influencing fit factors, such as tolerance grades selection, fit types selection and fit systems selection. Classes are constructed with above concepts in Protégé. A few necessary properties are added to restrict classes of the ontology. Some individuals are created to facilitate the reasoning and query of the best fit. A fit case is shown to achieve the recommendation of the best fit with given information by the priority fit ontology. Because of the similarity between priority fit and other kinds of fits, the technical reference are provided to construct the ontology of common fit, general fit and any fit.
Problems about the Evaluating System of the Pixel Luminance Uniformity of LED Display Using a Digital Camera
Authors: Zou Feng , Chen Shan
Published: September 2011

Digital Camera is widely used in the evaluating system of the pixel luminance uniformity of LED display. The evaluating system of the pixel luminance uniformity of LED display using a Digital Camera (DC) has many benefits, but the measuring accuracy is unsatisfied. In the paper the contributing factors are entered into details.
Analysis of the Measurability Requirement for Weaponry
Authors: Jiang Wei
Published: September 2011

Now, a great deal of high tech weaponry are equipped for army, to ensure combat effectiveness of equipment in the Entire Life Cycle (ELC) and improve battle effectiveness, the measurability of equipment should be paid more and more attention to.This paper analyzes the measurability requirement for Weaponry in ELC, the detailed aims and signification of measurability in ELC are presented.Some suggestions about strengthen measurability of equipment on the basis of above analysis are put forward.
Mathematics Modelling of Hobbing Gear with Arbitrary Tooth Profile and Investigation
Authors: Hu Hua Rong , Luo Shan Ming , Chen Lei
Published: September 2011

Based on space meshing theory, the coordinate relation between the hob and the gear is established using the general tool which is used to product a standard involute gear. The space conversion matrix of hobbing movement is deduced. The movement controlling model of CNC gear-hobbing machine of the gear with arbitrary tooth profile is built. By taking cosine gear as an example, the modelling is studied. It provides a theoretical foundation for machining the arbitrary profile gear and the complex surface.
Studies on the Influence of the Frame Structure’s Deformation of the Automatic Hydraulic Tile Press on Energy Consumption
Authors: Huang Zhi Cheng , Li Ze Lun
Published: September 2011

The influence of the frame structure’s deformation of the automatic hydraulic tile press on energy consumption has long been neglected. In this paper, a case study in two common beam-column types hydraulic automatic tile press, get the deformations of the columns produced by the tensile by using the finite element method, and then calculate their energy consumption due to deformations. Through analysis and comparison, provide a reference for future design and selection of the hydraulic automatic tile press.
A Radius Correction Method Called 4 Points Co-Sphere and its Application in Screw Rotor Detecting
Authors: Hu Peng Hao , Zhou Zheng Qing , Zhao Qian Cheng
Published: September 2011

In this paper a radius correction method called 4 points co-sphere and simulation for rotor measurement are discussed. The error of rotor end profile after compensation is evaluated by approaching the minimum zone condition successively. Normal vector bound method determines the theoretical curve segment, searching theoretical corresponding point with dichotomy. The evaluation results have shown that the radius correction method of 4 points co-sphere can be used in rotor measurement, and have more applied value in project.
Design of the Resonator for Microwave Moisture Instrument
Authors: Li Ze Lun , Si Jian Gang , Huang Zhi Cheng
Published: September 2011

A microwave resonator for the moisture instrument has been designed. The principles of the microwave resonator were analyzed theoretically and the structure of the resonator was designed. The sizes of the resonator, the resonant modes and the resonant frequency are all calculated and designed in the paper. It can be concluded from the parameters of the resonator developed in the laboratory that the resonator can be used in the moisture instrument with microwave method.
Kinematic Characteristics Research of the Superfine Particles in the Superfine Vibration Mill
Authors: Tang Guo Ning , Peng Meng , Liu Wei , Ren Dan
Published: September 2011

Based on the understanding of discrete grinding-medium group dynamics model, this paper describes discrete body kinematics characters in the roller room of super-fine vibration mill. First, determines the relationship between the vibration mill frequency and filling rate; second, discusses and explores the stress distribution and Moore stress round of discrete body working in the roller; third, determines the working area in the roller’s working room theoretically. Through the analysis of the SPH simulation, the result is consistent with the actual work of vibration mill basically.
Development and Industry Outlook of Crushing Technology
Authors: Mu Fu Sheng , Liu Yi Lun
Published: September 2011

Crushing is the necessary process of solid mineral resources development and utilization, and the technology level of grinding equipment is closely related with the development and utilization of mineral resource. In this paper, the main grinding equipments such as jaw crusher, cone crusher and ball grinding mill, are comprehensively summarized, especially on the technology’s development, the existing problems and development’s direction. In addition, the prospect and direction of the grinding technology are put forward in the view of industry.
Preparation of Mo (Si, Al) 2 by Microwave Assisted Combustion Synthesis
Authors: Tang Si Wen , Yan Jian Hui , Peng Cheng Zhang
Published: September 2011

Al substituted MoSi2composites were prepared by using microwave assisted synthesis method, which is a self-propagation synthesis ignited by microwave energy. The composition and microstructure of as combusted powder had been detected by XRD and SEM analysis. Result shows that the pre-heating temperature and phase composition of microwave assisted combustion synthesis is largely influenced by the content of aluminum. The phase structure of Mo(Si, Al)2alter from a mixture of MoSi2and Mo5Si3to nearly pure Mo (Si, Al)2with the increasing of Al substitution. The main mechanism is dissolution separation..
Development of Position Detector with Large Sensing Area Using Frosted Glass
Authors: Kitazono Yuhki , Miyata Kohei , Nakashima Shota , Zhang Li Feng , Seiichi Serikawa
Published: September 2011

This paper proposes a new position detector using frosted glass and four photo detectors. Four photo detectors are arranged under the four corners of the rough surface of frosted glass. When this sensor is irradiated by laser pointer, the light repeats reflection in the frosted glass and arrives at the photo detectors. The light intensity decreases by the increasing of distance between the photo detector and the irradiating point. Therefore, the distance between a photo detector and the irradiation point can be worked out from the output of the photo detectors. Thus, the light irradiation point can be derived from the distances with the four photo detectors. This sensor is low cost and has a large sensing area. In addition, this sensor also can be used as a pointing device because the movement of the light on the frosted glass can be judged.
Building Facades Extraction from on-Vehicle Camera Images in a Graph-Cut-Based Optimization Framework
Authors: Kawano Hideaki , Orii Hideaki , Fukuda Yoshiya , Maeda Hiroshi
Published: September 2011

In this paper, a method to extract building wall textures from an on-vehicle camera imagesis proposed as an aid to construct the 3D maps. The building wall textures are required to attach to 3Dpolygons which are obtained through 3D measurements in urban space.We assume that the on-vehiclecamera is under linear uniform motion and building walls are planar regions perpendicular to the opti-cal axis. Under the assumption, the same building wall region has the same depth, or disparities, overthe region among successive images. Since disparities derived from foreground objects are differentfrom the disparities derived from the building wall, we can use the disparity differences as a clue toeffectively distinguish the building walls from the foreground objects. We formulate the extractionof building wall textures incorporating these consideration as an optimization problem which can besolved by graph-cut algorithm. To show the effectiveness of the proposed method, it is applied to somesequential scenes.
Decorated Character Recognition Employing Modified SOM Matching
Authors: Masuhara Tsukasa , Kawano Hideaki , Orii Hideaki , Maeda Hiroshi
Published: September 2011

Character recognition is a classical issue which has been devoted by a lot of researchers.Making character recognition system more widely available in natural scene images might open upinteresting possibility to use as an input interface of characters and an annotation method for images.Nevertheless, it is still difficult to recognize all sorts of fonts including decorated characters such ascharacters depicted on signboards. The decorated characters are constructed by using some specialtechniques for attracting viewers' attentions. Therefore, it is hard to obtain good recognition results bythe existingOCRs. In this paper,we propose a newcharacter recognition systemusing SOM. The SOMis employed to extract an essential structure concerning the topology from a character. The extractedtopological structure from each character is used to matching and the recognition is performed on thebasis of the topological matching. Experimental results show the effectiveness of the proposed methodin most forms of characters.
Detection of Multiple Moving Points with a Position Sensitive Device Using Modulated Light Targets
Authors: Yang Shi Yuan , Matsura Kiyotada , Seiichi Serikawa
Published: September 2011

Remote sensing of position detection and motion detection plays an important part in the welfare filed of human social life. Privacy is a serious problem when detecting human position and motion. A position sensitive device (PSD) only detects the position of a light target without detailed image of human. For detecting multiple light targets, there are various problems such as synchronized light source and noise in daily life space. In this study, we suggest a method using modulated light targets to separate different light targets and eliminate the noise in daily life space for motion detection of a PSD. The target light intensity is modulated with different high frequency source for different targets, so that the noise in daily life space can be eliminated and the positions of different targets can be separated by using band-pass filters. Experimental results showed this method is effective.