bluuebunny/crossref_metadata_2025 huggingface dataset:
The Study of the Relationship between the Helix and the Individual Error in Gear Hob Measurements
Authors: Fan Xiao Lan , Deng Na
Published: October 2010

As a tool of complex shape, the manufacturing error of　hobs can be classed into three kinds: the datum level error, the tooth thickness error and the parameter error of helicoidal surface. The parameter error of helicoidal surface, which is composed of tooth error and helix error, is the most importance among them. For precision of hob and convenience of measurement, several individual errors are instead of the helix error. How to set reasonable individual errors to guarantee the helix error within tolerance, the relationship between them in gear hob measurements is analyzed, and the approach to decompose the helix error into individual error has been discussed in the paper. On the basis of above theory, a high precision mode can be easily established using the soft ware.
Visual Technique for Detecting Weld Position Based on Hough Transformation
Authors: Li Zhao Yu , Gao Xiang Dong , Zhu Xing Huan , Lin Jian Wen
Published: October 2010

Detecting the weld position is the precondition of seam tracking during an arc welding process, and is crucial to achieve high-quality welds. Visual sensing is one of the most attractive approaches to detect the weld position, which provides valuable information to control the arc following the expected path. The weld edge is main characteristics of the weld position image, here the visual technique for detecting the weld position based on Hough transformation is proposed. The weld position can be detected and recognized through Hough transformation, while the weld edge image is detected using the Canny operators. And Hough transformation is modified based on the actual weld situation. Therefore, the precision of the weld detection can be improved. From the analysis of experiments, it has been proved that the proposed method can detect the width and the center of the weld, and is suitable for the seam tracking system based on the computer vision.
Uncertainty Estimation in Straightness Mini-Zone Verification Based on Improved GPS Standard System
Authors: Du Hai Qing , Zhang Ya
Published: October 2010

Improved Geometrical Product Specifications (GPS) is an internationally accepted standards system. It is the foundation of the technology standards and metrology specifications. Uncertainty is one of the most important concepts in improved GPS. In the improved GPS standards system, uncertainty is used as an economic tool to enable optimum allocation of resources amongst specification, manufacturing and verification. Estimation of uncertainty in measurement according to improved GPS can improve the reliability of the measurement. A method to estimate the uncertainty in straightness measurement is proposed according to the requirements of improved GPS standard system. Based on the mini-zone method and the transparent box model, the calculation equation of uncertainty in straightness measurement is deduced. The experiment indicates that this method may assure the integrity of the verification result and improve the reliability of measurement.
Machine Vision System for Inspecting Surgical Blades
Authors: Wang Shu Yi , Tan Jie , Yin Xun Chao , Wang Hui Fang
Published: October 2010

In this paper, a surgical blade inspecting system is designed and researched, which can automatic test and determine eligibility according to tolerances. High precision and non-contact detection of surgical blades based on machine vision is realized by using camera with telecentric lens to obtain the image of surgical blades, by applying template matching technique to automatic match surgical blades. One-dimensional edge of sub-pixel accuracy is extracted by combining the edge filtering of the Deriche filter and parabolic fitting for the maximum range from edge. It can be used for precise measurement of different part of surgical blades with different sizes. Extensive experiments showed that measuring range is from 2mm ~ 50mm, measuring accuracy is 10μm and average detection time is 0.6s. Thus the inspection system is fast, accurate and robust to fulfill the industrial demands.
A Novel Method of Wire Detection Combined PCNN with HT
Authors: Han Guang , Zhang Miao , Zhong Ying Chun , Wei Li Xing
Published: October 2010

The traditional method of wire detection is implemented artificially, and that is heavy-worked, inefficient and low-accurate. This paper proposes a novel method to complete the job by using image technology to improve production efficiency and product qualification rate. In this paper, Pulse Coupled Neuron Network (PCNN) has been applied to the wire image preprocessing, and then Hough Transform (HT) is used to extract features of lines, and detect them according to these features from the processed image. After that, whether the wires were qualified was determined by the criterion of parallelism and isometry. Comparison between different wire images was given in the experimental study. Experimental results showed that the proposed method was feasible and this method could achieve higher detection accuracy and efficiency compared with the traditional method.
A Fast and Precise Measuring Method for Large Workpiece Based on Machine Vision
Authors: Zhou Hu , Yang Jian Guo
Published: October 2010

Image measurement based on machine vision is a promising method for the precise measurements of machine parts. As for a large sized workpiece that exceeds the FOV (field of view) of the camera, image mosaic must be performed to implement measurement. While traditional template matching algorithms will lead to long runtime consumption, a combination of algorithms with precise mechanical positioning function using motion control was proposed and applied in the machine vision system. The manufacturing and installing errors have been taken into account to improve the positioning accuracy. This method minimized the search space and thereby reduced the runtime substantially. In addition, a stop criterion of the computation for the algorithms was applied to save a considerable amount of time in the process. Experimental results show that the precision of the image mosaic meets the requirements while speeding up the process significantly.
Application of Machine Vision Technique in Plate Camber Control System
Authors: He Chun Yu , Jiao Zhi Jie , Wu Di
Published: October 2010

In plate rolling, the existence of some asymmetry rolling conditions, affects the distribution of transversal thickness of rolling pieces, leading to the occurrence of camber phenomenon, which in turn seriously affect the product's material yield. In this paper, based on the images of plates in the production line collected by camera, taking into account the requirements for on-line measurement, filtering noise from image information, use edge detection operator, Hough transform methods and sub pixel edge location method to identify the steel plates, have achieved in-line measurement of camber curvature of plate side. At the same time, combined with camber control model, we have developed camber curvature measurement and control system, realized the automatic correction control of camber curvature of rolling pieces in the production process. Field applications show that this method can reduce the human intervention, will limit the camber curvature of rolling pieces within a certain range, which has great significance for improving the product’s yield.
Measurement Method for the Symmetry Error of Double Keyway in a Wheel Hub Bore
Authors: Zhao Xiao Ming , Feng Yun
Published: October 2010

In this paper, a new measurement method is presented, This method is to use a three-coordinate measuring machine (CMM) to test the symmetry error of double keyway in a wheel hub bore. According to the minimum condition criterion of form and position error evaluation, and making use of the minimum tolerance zone of position error evaluation, two symmetry error formulas of double keyway in a wheel hub bore are deduced by geometric analysis. The problems may be encountered when using the formulas in the practical application are discussed. These formulas solve the measurement principle problem of double keyway in the engineering practice. In the end an example is put forward to verify this method and the formulas.
Research of Welding Deformation Measurement Based on Visual Method
Authors: Huang Jian Kang , Lu Li Hui , Wu Xiao Liang , Shi Yu , Fan Ding
Published: October 2010

Thermal deformation of welding structure is inevitable in welding process. The deformation will not only change the appearance, shape and geometry size of the welding structure, reduce assembly quality but also may reduce the bearing capacity. On this basis, a welding deformation measurement based on visual method was proposed for the problem of the thermal deformation measurement in welding process. Theoretical calculations were carried out and an image processing and measurement algorithm based on MATLAB was also put forward. Then welding deformation measurement experiment was carried out and the results show that the welding deformation obtained by actual measurement is consistent with the theoretical analysis, proving the feasibility of welding deformation measurement based on vision. The welding deformation measurement based on visual method lays a foundation for automatic measurement of welding deformation.
Design of Remote Calibration System Oriented to Multiple Objects and Complex Requirements
Authors: Wu Zhuo Kui , Liu Gui Xiong , Hong Xiao Bin
Published: October 2010

According to the demands that calibration organizations need to calibrate various instruments and calibration requirements are complex, a kind of remote calibration system oriented to multiple objects and complex requirements is developed. The system architecture is designed. It’s based on B/S mode, and has the advantage that calibration operation can be done anywhere having Internet access. Then the requirement of remote control is realized. The objects and functions of the system are analyzed in detail, and the object models are built by using object-oriented idea and these models are realized by relation model whose related theories are mature. Then the operation commands can be defined flexibly and the problem that calibration requirements are complex is solved. The theory and experiment shows that the system can be used to calibrate various instruments, its operation command definition is flexible and calibration operation can be done anywhere having Internet access by using the system.
Research for Transverse Tension Distribution on Steel Strip in Continuous-Annealing Furnace Based on ANSYS
Authors: Liu Jian Xiong , Li Hui Mian , Li Jun Hong , Wu Zheng Yu , Zhan Zhao Lin
Published: October 2010

The cold rolled strip undergoes great transforming of micro-organization and change in properties in continuous annealing furnace. At the same time, it is acted upon by all kinds of forces, such as tensile and compressive stresses, bending stress, thermal stress. and thus it would affect stability of the steel strip. The finite element model of steel strip and guide rollers are established, and the ANSYS software is used to study the effects on transverse stress distribution under different strip shapes that contains center buckle, double edge wave, compound buckle, quarter buckle and quality shape. Profile of guide rollers such as different crowns and straight lengths are also be researched which is intended to provide a reliable base in theory for getting reasonable profile of guide rollers and homogenizing the tensile stress to improve shape quality.
Comparative Research on Contact and Non-Contact Measuring Methods of 3D Twisted Blades in a Torque Converter
Authors: Yan Qing Dong , Liu Cheng , Wei Wei
Published: October 2010

The contact and non-contact measuring methods were adopted to measure the twisted blades of the turbine in a casting torque converter. The curves were reconstructed using the B-spline and Bezier curve. Then the blade parameters were extracted based on the conformal transformation. Compared with the original data of the designed blades, measuring results of both methods were effective, while errors existed during both measuring processes including data missing error, measurement error and fitting error. Compared with the contact measuring method, the non-contact measuring method needed improvement because of its larger errors, which is mainly caused by the shrink and distortion of silicone rubber. But non-contact measuring method will be a trend in measurement system because of its own advantages such as expeditiousness, automation and the ability of acquiring relatively comprehensive information.
A Novel Method of Sub-Pixel Linear Edge Detection Based on First Derivative Approach
Authors: Shi Xue Chao , Sun Zhen Zhong , Lu Sheng Lin
Published: October 2010

In this paper, a novel algorithm is proposed to detect linear edge. Image gradient is acquired by Sobel or Prewitt filters. Logical addition is applied to enhance image contrast. Statistical method is employed to cope with gradient data—gradient projection in the horizontal and vertical direction to compute the average gradient value. Multi-level B-Spline interpolation is employed to smooth gradient data. At last, edge coordinates can be computed precisely by the number and interval of extreme points. The experiment results are presented to show validity of the algorithm, which precision and accuracy can reach to sub-pixel. The proposed approach puts merits of zero crossing method and threshold method together, which is very robust, convenient and efficient to detect linear edge in industrial environment.
Application of Image Processing in Quality Detection of PS Plate
Authors: Li Ya Jing , Pu Jie Xin , Zhang Qing Hua
Published: October 2010

In offset printing system, presensitized plate (PS plate) is one of the key factors that influences the quality of printing products. In this paper, we suggest an application of image processing techniques to improve the accuracy of quality detection of PS plate. We use median filtering to get rid of noises and grayscale stretch to enhance image. An improved adaptive threshold selection method for defect segmentation is proposed based on the characteristic of grads-histogram of PS plate image, and a fast scanning algorithm is put forward to extract features of defects for classification and recognition. The experimental results show that the above methods can obtain the accuracy of 96.7% for defect detection of PS plate and the minimum detectable diameter of defects is 0.2mm, which has reached the enterprise standard for quality detection.
Research on Adaptive Denoising Method for Surface Roughness Measuring
Authors: Pan Xiao Bin , Zhou Xiao Jun , You Zu Sheng
Published: October 2010

This paper analyses the method of denoising surface roughness profile signal using self-adaptive filtering technique.The working principle of self-adaptive denoising has been introduced.Method of combining of self-adaptive filter and least square error(LMS) algorithm has been designed.Results obtained from sin-wave with noise are validated using the LMS algorithm to eliminate noise.Comparison of caculating surface roughness mean line between self-adaptive Gaussian filtering meanline and ordinary Gaussian filtering meanline has been presented.From the simulation of self-adaptive denoising it is observed that the designed method can be used as a denoising method in the surface roughness measuring.
The Research and Simulation of Trajectory Generation Method for Tractor-Trailer Mobile Robot
Authors: Zhang Qin , Li Yan , Kamiya Yoshitsugu
Published: October 2010

The tractor-trailer mobile robot (TTMR) is composed of a tractor and multiple trailers. It belongs to a typical nonholonomic, underactuated system. The general control theory can hardly be applied to this system. Because of the multi-body tractor-trailer mobile robot existence, the moving trajectory control is very complicated, especially backward path control becomes a difficult problem for this kind of robot control. This paper takes parking trajectory generation for example, makes tentativeness on tractor-trailer mobile robot to generate the trajectory based on Repeatedly Direct Kinematics (RDK) method. The feasible forward and backward trajectory generations algorithm for tractor-trailer mobile robot are proposed. The design complexity and existing singularity for tractor-trailer mobile robot system are solved. Simulations show the effectiveness of the proposed method.
Matlab-Based Embedded Controller Design for Robot
Authors: Ning Yi , Zhao Jun Feng
Published: October 2010

For highly complex embedded control systems, the use of traditional methods of design is very difficult to achieve satisfactory results. In a cooperative project of national 863 plans, the Matlab-based scheme in TDE (Total Development Environment) way was made to design the control system of free-flying space robot, an in-obit service satellite. It can overcome the shortcomings of traditional design to make greater system stability, improve the life of the equipment, speed up development and reduce development costs. In this paper, a development platform was built on Matlab for embedded control system of the manipulator onboard the free-flying space robot. The controller design and simulation was implemented on it. The entire development process is divided into algorithm design, system simulation, and automatic code generation. A test harness was created to test and verify the unit-under-test. The results of experiment show that Control accuracy of the simulation was satisfied with the practical requirements.
A New Blind Source Separation Algorithm in Application of Over-Determined Mode under Lower SNR
Authors: Wang Ping , Chen Jian , Lu Ji Xiang
Published: October 2010

The paper proposes a new BSS algorithm based on the second-order statistics. By jointly diagonalizing the time delay correlation matrix of the observed signals and using the improved new non-orthogonal joint diagonalization (NOJD) method, a better solution is achieved. The proposed algorithm can successfully separate communication signals under SNR as low as 10dB and the over-determined mode regardless of the signals’ modulation methods. Signal to Interference Noise Ratio (SINR) is used to prove the superiority of the proposed algorithm over the classical Second-Order Blind Identification (SOBI).
Integrated CAD Software with ERP Interface for Steel Portal Frames
Authors: Liu Shen Ru , Yang Hui Zhu , Chang Zhi Guo , Zhang Qi Lin
Published: October 2010

Steel portal frames have been widely designed and constructed in China since the end of the last century, and in recent years ERP management software systems have been used by more and more steel structure fabricators/constructors. This paper introduces the program principles and techniques of the development of integrated CAD software with ERP interface for the detailing design of steel portal frame structure, including the frame work, data structure, 3D modeling algorithm and automatic output of 2D drawings/ERP source data. In the system, steel members and connectors are modeled and visualized as 3D objects. All information, involving geometry, material, manufacturing, fabrication, installation, ERP data requirements and so on, are embedded in these 3D objects for the purpose of parametric modeling and subsequent data output. 3D solid model acts as the kernel of the system. Connectors of joints are classified and organized by way of logic hierarchy, 3D model of joint are assembled abide by the structural and geometric dependency relationship between connectors. The ERP data interface is embedded in the system. The raw data are directly extracted from the 3D model, then formatted and fed to certain ERP system.
Reflection and Refraction of Longitudinal Displacement Wave at Interface between Two Micropolar Elastic Solid
Authors: Xue Bing Bing , Xu Hong Yu , Fu Zhu Mu , Sun Qing Yong
Published: October 2010

Using the model of generalized micropolar magneto-thermo-elasticity, reflection and refraction of longitudinal displacement wave at interface of two welded micropolar elastic media are studied. The model can be applied to the coupled theory as well as to five generalizations, such as L-S theory, G-L theory, H-I theory, G-N theory of type (II) and C-T theory. And if some parameters in this model are taken as given values, we can easily deduce the known models of Kelvin-Voigt model and other generalized micropolar/magneto/thermo/viscoelastic theory model. Using continuous conditions at the interface, the amplitude ratios of reflected and refracted micropolar magneto-thermoelastic longitudinal displacement waves, longitudinal microrotational waves and the coupled transverse and microrotational waves are studied for incident longitudinal displacement wave. The numerical results show that the effect of magnetic field is very significant on the amplitude ratios.
Servomotor Parameter Estimation of a 2-DOF Translations and Full Rotation Parallel Mechanism
Authors: Ni Yan Bing , Zhong Xue Yong , Guo Lei , Luo Fa Yang
Published: October 2010

Considering the need of designing a parallel mechanism which can achieve a whole week of rotation and two translations, in this paper, the inverse dynamic model based on the virtual work principle was established. And because the maximum velocity and torque of servomotor are the key indices to choose the servomotor, the prediction models of the maximum velocity and torque of active joints employing the singular value decomposition technique were established as well; further, the prediction model of moment of inertia of servomotor was proposed, and then the computer simulation which can the indentify the effectiveness of this method was conducted. The estimating method has been successfully applied in the series of the parallel mechanisms.
Study of Dry Wire Electrical Discharge Grinding
Authors: Qian Ying Ping , Huang Ju Hua , Zhou Xi Zhi , Kunieda Masanori
Published: October 2010

In this paper, the attempt was made to study dry WEDG (Wire Electrical Discharge Grinding), the differences between dry WEDG and wet WEDG, especially the rods appearance and material removal speed and surface roughness were studied experimentally, the results are as follow: (1) The shape especially the symmetry of the rods fabricated with WEDG using kerosene as dielectric fluid is better than that of dry WEDG only using pure air as dielectric. (2) The material removal speed is obviously higher in wet WEDG than that in dry WEDG. (3) The surface roughness of the rods fabricated with wet WEDG is lower than that with dry WEDG;.(4) The wet WEDG can be used in the roughness machining to improve the speed, and the dry WEDG can be used in the finishing machining to advance the surface quality.
A Multi-Sensory Robot Used for Searching Toxic Gas Leak Source
Authors: Zhang Xiao Jun , Zhang Ming Lu , Zhang Jian Hua , Sun Ling Yu
Published: October 2010

For filling the application requirement of searching toxic gas leak source, a multi-sensory robot, which is used for searching toxic gas leak source, is developed. This robot consists of humanoid multiple degree of freedom head system and tracked walking mechanism, with the sense of smell, hearing and stereo vision and other functions. The robot’s bionic olfaction system can detect 5 kinds of toxic gas in the same time, and the hearing system consisted of four microphones can get all kinds of sound in the general environment. Meanwhile, its binocular stereo vision system can get the 3D information of the work environmental. Distributed controll system is constructed for the robot, and comprehensive utilization of the multi-sensory function can increase the efficiency and accuracy of searching leakage. This robot can give full play the advantage of multiple degrees of freedom to expand the searching scope of the robot, and enhance the flexibility of the searching behavior. This robot system has wide application prospects in the environment of toxic gas.
An Improved Spectral Subtraction Algorithm Study Based on Voice Human-Computer Interaction in Cockpit
Authors: Lu Ji Xiang , Wang Ping , Yi Long
Published: October 2010

The voice interaction in cockpit mainly includes speech recognition, enhancement and synthesis. This interaction transfers the speech information to the corresponding orders to make machines in cockpit work unmistaken, also feedback the execution results to users by speech output devices or some other ways. The speech enhancement technology is studied in this paper, aiming at the Voice Interactive. We propose an improved spectral subtraction (SS) algorithm based on auditory masking effect, by using two steps SS. The simulated results based on the segment SNR compared to the traditional SS show the effectiveness and superiority of the improved algorithm.
Overall Design of High Pressure Isolation Plug Train
Authors: Zhang Ce , Zhang Shi Min , Zhao Hong Lin , Xu Xue Yi , Geng Dai
Published: October 2010

High pressure isolation plug train is a remote control, tetherless, highly piggable and high pressure isolation tool. The advantage of using the pressure isolation tool is to minimize production down time. Domestic research has started recently because of the foreign blockade of its core technologies, there are no relative products coming out currently. The smartplug that have been mentioned consist of plugging module, pigging module, hydraulic power module and communication and control module. The paper describes design ideas of each module in detail respectively and according to the design methods the prototype with diameter of 12 inches has been produced so far. Sealing pressure achieves 10Mpa by experiment. Looking forward to the technology would be applied in pipeline valve replacements and repairs, riser replacements and repairs, pressure test of risers and pipelines, midline pipeline repairs and relative engineering areas.
A Robot Calibration Method Based on Virtual Closed Kinematic Chain
Authors: Wang Tian Qin , Liu Chang , Zhang Zhen Pu , Wang Da Cheng
Published: October 2010

This paper offers a robot calibration approach based on the virtual closed kinematic chain so that the absolute location accuracy of a robot can be improved. The calibration approach suggests that laser beam can be mounted on the robot’s end so as to form a virtual closed kinematic chain in the interest of enlarging the pose errors to proper extent, in this way straight line equations in space can be acquired when the robot positions are changed continuously, in the end the robots’ kinematic parameters can be figured out by genetic algorithm while measurement can be totally avoided in the calibration. Calibrating practices, simulating analysis and experiments on robots show that the approach can improve the absolute calibrating accuracy effectively.
A Four Degrees of Freedom Parallel Manipulator for Machining
Authors: Chen Wen Jia , He Yan Zhong , Zhang Jiang
Published: October 2010

In the past decades, a number of parallel manipulators have been extensively studied. However, most efforts are dedicated to six degrees of freedom (DOF) or three-DOF manipulators. There is a need for equipment providing more than three DOF's arranged in parallel and based on simpler arrangements than six-DOF arrangements in application. This paper presents a novel four-DOF parallel platform manipulator with base mounted prismatic actuators. The manipulator is driven by four linear actuators. The movable platform of the manipulator can translate along two directions and rotate around two axes respectively. The kinematics model is formulated, which describes the inverse and forward kinematics transformation. It is very easy to develop a five-axis NC machine-tool which is of large-workspace based on the four-DOF parallel mechanism presented in this paper.
Vibration Analysis of New Type Pipeline-Cleaning Robot
Authors: He Qing Zhong , Zhao Wen Chun , Wang Jia , Zhang Yan Ling , Wang Ming Chao
Published: October 2010

The new type of pipeline-cleaning robot discussed in this paper is developed to clean pipelines within the diameter range 200mm-250mm, which is propelled by using screw locomotion. With the help of CATIA, the modeling & simulation software, the simulation model of the robot and its vibration analysis has been obtained. From the analysis, dynamic characteristics of pipeline robot vary with the output parameters of control module and the structures of robot joints. Stimulated vibration has very little influences on the whole machine. The stability and reliability of the robot have been proven. According to the experimental study of principle prototype and dynamic simulation study of the virtual prototype, dynamic characteristics can be improved by optimizing the structures of robot and the related output parameters of control module, which contributes to the improvement of its motion stability. Therefore, it is believed that the robot has great value in practical use.
New Plane/Space Thermal Cutting Robot Workstation System
Authors: Kong Xiang Bing , Cui Yue , Yao Yao
Published: October 2010

The new plane/space thermal cutting robot work station system for metal plate for a variety of two-dimensional (such as plane) and three-dimensional (such as Groove) cutting jobs, fully applies to the user on any graphics sheet metal cutting and cutting groove. It is based on robot and plane thermal cutting area or space thermal cutting area mature technology applications in the system. This article focuses on the new system composition and configuration, works, pneumatic control systems, robotics and controller applications, space thermal cutting control programming methods, etc. The new system, the higher degree of automation is a metal sheet processing. Through practical, cutting performance stable and reliable, the workpiece bulk cutting heterogeneity, significantly reducing the labor and improving productivity.
Laser Brazing Diamond Grinding Wheel with Ni-Base Filler Alloy
Authors: Yang Zhi Bo , Liu Ai Ju , Xu Jiu Hua
Published: October 2010

Brazing diamond wheel was carried out via laser in an argon atmosphere. The interfacial microstructures among brazed diamond, the filler alloy and matrix were analyzed by scanning electron microscopy (SEM), energy dispersion spectrometer (EDS) and X- ray diffraction (XRD). The formation mechanism of carbide layers was also discussed. Finally, grinding examination of the grinding wheel was carried through. The results show that diamond can not fall off from the wheel even at heavy duty conditions.
Research on the System for Coal Mine Disasters Prevention Based on Modularization Heterogeneous Multi-Robot
Authors: Wang Hong , Jia Rui Qing , Zhu Hong Xiu
Published: October 2010

A novel system based on the technology of Modularization Heterogeneous Multi-robot System(MHMRS)is advanced to meet the needs of the coal mine disasters prevention. The multi-robot system consists of a lot of member robots which are made up of basic modules with known function by the means of modularization. The characteristics of the new system are that: simple configuration, small volume and various structures of modules. The rule to utilize the robots to monitor the equipment integrity and the on-site unsafely behaviors is put forward, and emergency temporary network is adopted to decrease the risk of the existing manual rescue and increase the ability of the rescue system.
The Trajectory Optimization of Spray Painting Robot for Conical Surface
Authors: Zeng Yong , Gong Jun
Published: October 2010

We attempt to resolve the spraying trajectory planning efficiency and the thickness uniformity problems for big curvature conical surface in complex curved surfaces. By experimental data, the coating growth rate model is obtained and we analyzed the applications of the model on conical surface. Based on the characteristics of conical surface is the regular surfaces, we planned the spray gun trajectory on this surface, and used the methods of adjust the spray radius and track section to discussed the calculation method of the coating thickness and optimization of correlation parameter. Taking car bumper for example, we studied the spray trajectory optimization on the juncture of conical surface and plane. Simulation results show that, our method can effectively increase the efficiency of spray trajectory planning under the premise of ensuring the thickness uniformity, the spray velocity show the non-linear variations with spacing distance and others show the linear variations, the uniformity of coating thickness meets the quality request on the juncture of conical surface and plane.
The Pig Tracking System Based on AVR Microcontroller and GPS/GSM
Authors: Wang Hong Juan , Zhang Shi Min , Zhang Peng , Shi Li Yun
Published: October 2010

Oil and gas pipelines must be cleaned regularly to ensure their normal operation. It is significant to track the pig when it’s working in the pipeline. With the GPS and GSM technology, this paper introduces a kind of intelligent pig tracking system, The system uses ultra-low frequency electromagnetic wave with strong penetrating to transmit data. It concludes two parts: transmitter part and receiving part. The transmitter part which connects with the pig is controlled by SCM, interval transmitting ultra-low frequency pulse signal. The receiving part uses AVR SCM as its core controller and is mainly composed of magnetic pulse signal receiving module, GSM module, GPS module and LCD module. When the pig is working, the transmitting part interval transmits ultra-low frequency pulse signal. After receiving the right signal, the receiving part will send the location information to the designated GSM handsets. This system makes pig remote monitoring come true.
Research on Machine Vision in Forestry Pluck System
Authors: Li Xin , Zhang Chun Liang , Li Li Jun , Hu Zhi
Published: October 2010

Forestry industry is an important part of nation's economy. In this paper, a machine vision system is presented as a key module of Camellia oleifera pluck robot. In order to cut fruit image up from complicate background, SOFM neural network and gray thresh is used in image segmentation. In SOFM method, take R-B,G-R,G-B and hue H tunnel as input feature vectors, use self-organization network to clustering can get the best effect. in gray threshold method can take various of method to get the best threshold, such as PSO and GA algorithm, and MATLAB includes the toolboxes. At last use noise ratio, area ratio, divided time, Fourier boundary descriptors and other indicators to assess the accuracy of segmentation. The methods have the significance to the current and subsequent research of forestry pluck device.
Ab Initio Study of the Structural and Mechanical Properties of Hf-Si-N
Authors: Tan Xin , Li Yu Qing , Liu Xue Jie , Liu De Gong
Published: October 2010

The structural and elastic properties of HfN and Hf-Si-N have been studied, using first principles calculations based on the density functional theory. These calculations provide the lattice parameter, cohesive energy and elastic constants of fcc (NaCl)-HfN, the N-deficient Hf-Si-N and the Hf-deficient Hf-Si-N solution phase. In order to study the relative stability, binding energy of all configurations has been calculated. The results showed that it was difficult to add a Si atom into the center of the HfN cell because the cohesive energy decreased. However, if an Hf atom or an N atom was missing in the HfN, a silicon atom was possible to occupy the vacant site and form the Hf-Si-N substitutional solid solution. Moreover, the bulk modulus, shear modulus and elastic modulus increased accordingly, the mechanical properties were improved.
Research on 2-Dof Parallel Robot and its Motion Characteristics
Authors: Shen Hui Ping , Ding Lei , Xue Chang Yu , Li Ju , Deng Jia Ming , Liu Shan Shu
Published: October 2010

A novel robot, derived from a planar parallel mechanism, is presented. With two sliders driving on the same side of parallel guide rails, this simple but practical mechanism is capable of realizing a large workspace. The direct and inverse kinematical solutions are given. The simulation demonstrates that all kinds of straight lines and circles can be realized by the end actuator of the robot; the corresponding motion disciplines and characteristics driven by the two sliders are analyzed; the results are verified on the prototype. By allowing the end actuator to move in Z-direction or to rotate around A or B-axis, three-, four-, five-axis manipulator would be composed and surface welding and space cutting would be realized. This paper lays the foundation for the real-time control and industrial application of this novel robot.
Research on Multi-Parameter Measure and Control Technology Based on Wireless Communication in Combined Environment Testing
Authors: Zhou Yuan Lai , He Wen , Shen Run Jie , Liu Min
Published: October 2010

Considering the requirement of the multi-parameter-combined environment testing device, a kind of multi-parameter measure and control system based on wireless communication technology was studied in this paper. First, the overall structure of the multi-parameter measure and control system based on wireless communication in combined environment device was put forward, which was made up of six control subsystems: a host computer, the centrifuge and dynamic balance system, the vibration and rectification system, the temperature system, the air pressure system and the sound pressure system. Then, the communication protocol and hardware structure of the multi-computer communication system based on wireless transmission were mainly studied. And software design technology of multi-parameter measure and control system was studied in succession. Finally, the five-parameter-combined environment testing was carried out. The experimental results show that the measure and control tasks of the combined environment testing can be well finished by the multi-parameter measure and control system.
Realization of WSN Location Monitoring Terminal System Operation Strategy
Authors: Liu Gui Xiong , Huang Yi Wei , Hong Xiao Bin
Published: October 2010

Aiming at mastering WNS monitoring status, controlling node devices in wireless sensor network, a WSN location monitoring terminal system is proposed. Using B/S website architecture, the real time response, the serial communication, the data storage realization mechanism and so on is studied on. A data server to storage WSN monitoring messages and an ASP.NET sever to run sever program correlated is established at the control center. According to the WSN location monitoring terminal system, the function of serial initialization, location monitoring messages displaying, node parameters configuring, user information and network information management can be realized. Experimental results show that the WSN location monitoring terminal system has a good real time, stability and accuracy performance, which can be extended to different WSN application fields.
Implementation of CANopen Distributed Control Network Based on ARM in Automatic Production Line
Authors: Zhang Jun , Chen Bing Bing , Zou Xiang Jun
Published: October 2010

An approach of implementing CANopen real-time distributed control network was proposed in this paper. To build the network, CanFestival open source CANopen stack was used. The CANopen slave nodes were established on ARM7 LPC2478 platform with µC/OS-II real-time operating system; the CANopen master node was built on an industrial PC with Windows operating system. Test codes were added to trace the execution of a slave node, and the control interface of the master node was developed to manipulate the behaviors of slave nodes. At last, key components of time delay were analyzed and experiments were carried out in order to measure the performance of the network. Experimental results showed that the processing time of a CANopen object is about 100 µs which fulfills the need of most automatic production line.
Organically Modified MCM-Type Material Preparation and Its Usage in Controlled Ibuprofen Delivery
Authors: Yang Hong Xiang , Cheng Bo Wen , Li Zhen Huan , Su Kun Mei , Guo Qiang , Han Pu
Published: October 2010

MCM-41 functionalized by 3-aminopropyltriethoxysilane (APTMS) and 3-chloropropyltriethoxysilane (CPTMS) was synthesized, which had been used to improve the physicochemical properties of mesoporous silica to controlled ibuprofen delivery. Samples were characterized by X-ray diffraction (XRD), N2 adsorption-desorption isotherms and Fourier transform infrared (FT-IR) spectroscopy. Characterized results demonstrated that organic groups were successfully grafted onto the samples, and the mesoporous structure of the synthesized material was maintained. The results of ibuprofen release exhibited that the introduction of CPTMS greatly retarded the ibuprofen release rate, and an accumulative release achieved approximately 13.2 wt% over PClMCM-41 after 32 h. However, the introduction of APTMS greatly promoted the ibuprofen release rate, and the release of ibuprofen could increase to 26.6 wt% over PNH2MCM-41 at 32 h. Those results suggested that ibuprofen release rate could be well modulated by changing the grafted organic group.
De-Synchronization of the Distributed Refrigeration System
Authors: Chen Liang , Wisniewski Rafael
Published: October 2010

The supermarket refrigeration system typically has a distributed control structure, which simple and flexible, however, neglects interactions between its subsystems. Practice shows that these interactions lead to a synchronous operation of the display cases. It causes excessive wear on the compressors and increased energy consumption. The paper focuses on the synchronization analysis and de-synchronization control. The supermarket refrigeration system is modeled as a piecewise-affine switched system. The system behavior is decomposed such that synchronization analysis can be completed by using the Poincare map. A new de-synchronization scheme is proposed, which includes two steps: the synchronization monitoring and the de-synchronization control. Thus, the early warning of the synchronization can be given and then the de-synchronization controller can be activated. The scheme achieves better control performance and can deal with the large scale refrigeration system with different system parameters in the display cases.
Study on Sample Rate and Performance of a Networked Control System by Simulation
Authors: Si Mei Ling , Li Hong Xin , Chen Xiao Fei , Wang Guang Hui
Published: October 2010

Fixing the sample rate is very significant for a networked control system (NCS), and there is no a directive way to make it. In the paper, a method is proposed which is simple and directive to obtain a sample rate in the networked control system (NCS).By analyzing the schedule of a NCS, the paper get a minimum sample rate of a closed-feedback control which meet the need of performance and schedule. In the paper, it also figures out how to get the maximum sample rate by analyzing the performance requirement. At last, the paper give a analysis the relationship among induce-delay, overshoot and sample rate which can prepare for further work like optimizing the sample rate, designing a predictor to forecast the delay, and studying the robustness of controller in order to design a good controller.
Design of a New Frequency Converting Electromagnetic Water Treatment Control System
Authors: Liu Xiao Kang , Rao Jian Hua , Zhou Dong Mei
Published: October 2010

In order to meet the needs of the wide range of frequency and changeable voltage, and the combination of multi-frequency and multi-power in water process, a new frequency converting electromagnetic water treatment control system is developed. The frequency ranged from 1Hz to 1MHz is produced with the DDS pulse chip controlled by MCU, which guarantees that the range of frequency converting is wider. By using the switch circuit and MOSFET, the amplifier circuit is designed. The circuit and CNC power enlarge the output electromagnetic pulse power adjustable range. The software developed with LabVIEW makes frequency work under three kinds of frequency converting modes. And it also can make voltage run under the mode of voltage selecting and user-defined voltage converting. The designs improve the applicability of frequency converting electromagnetic water treatment (FCEWT) system.
Design of Embedded Numerical Control Platform for Carton Samplemaker
Authors: Liu Jian Qun , Wu Ji Rong , Xu Dong
Published: October 2010

As most controllers of the carton samplemaker using Industrial Personal Computer (IPC) architecture, its price is relatively expensive. Aiming at the actual situation of the high cost, low openness and big demand of the carton samplemaker, through the analysis of the control characteristics of it, the embedded Numerical Control (NC) platform based on the Advanced RISC Machines (ARM) and Digital Signal Processor (DSP) hardware architecture for carton samplemaker is designed. The overall framework of the platform and steps of the design are given in this paper. Windows CE embedded real-time operating system is adopted in the software design, and on this basis, the carton samplemaker applications is developed, which is mainly in charge of the motion control of the equipment and tasks management. The platform not only achieves the goals on real-time control, good speed and accuracy, but also has friendly operability. Finally, the introduction of the new dual-core chips gives a revelation on the future development in carton samplemaker.
The Application of Embedding Operating System at the High-Precision Temperature Calibration Device
Authors: Li Jin Yao , Zhang Ming Ming , Huang Hao Dong
Published: October 2010

In order to meet the fast on-site calibration of temperature sensor and temperature measuring instruments, A kind of intellectualized high-precision temperature calibration device based on Embedding System is developed. This device based on ARM and a proportional-fuzzy self-tuning PID optimal control algorithm is characterized by high accuracy and fast response. Its performance parameter is given as following: measuring range, 35oC-600 oC, accuracy, ± 0.50 oC (at 600 oC), resolution ,0.01 oC, stability time 40 minutes(at 600 oC). To ensure the portability of μC/OS-II, a set of data types is defined by authors. As same as all the real time cores, it is necessary for μC/OS-II to reject the interrupt before accessing the critical section of codes, and the interrupt is to be allowed again after the access. In this paper, the design of system , especially the porting of μC/OS-II operating system, is introduced.
Design of Pure Electric Vehicles’ Drive Motor Controller Based on dsPIC
Authors: Li Cheng Qun , Sun Xing , Dong Xiao Lei
Published: October 2010

To meet the industry demands of the drive motor controller of the pure electric vehicles, this paper introduces a design of the high-power brushless DC motor controller at the core of dsPIC30F6010A. Through the establishment of permanent magnet brushless DC motor (PMBLDC) mathematical model and the analysis of the running principle of it, the control scheme of pure electric vehicles was presented and the drive circuits, protection circuits and software programming of PMBLDC controller were designed in this paper. The paralled IGBT module is adopted as the drive circuits to solve the heat dissipation issues under the high current, PID is chosen as the control algorithm and cascade control is designed as the speed regulation.The simulation by MATLAB/simulink shows that the control scheme is reasonable, the system has fast response and smooth running.
Method of Judging the Energy Measurement Device Error Wiring Based on Checking Tables
Authors: Zhang Xing Zhong
Published: October 2010

Focused on the complexity and Time-consuming of judging the error wiring of the energy measurement device, It extracts a series of electric parameter tables including phase angle table, such as the voltage sequence table, the line voltage location table, phase angle transform table, and phase angle table. And proposes a simple method of judging the error wiring of Three-phase three-wire error wiring of two components energy measurement device. The method based only on the four tables, inspectors only need to look-up the tables in accordance with the measured dates and get the error wiring instead of drawing vector plots. Because these tables root from vector plots. It greatly simplifies inspectors to judge wiring mistake, improves the working efficiency and makes the test results more accurate.