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March 30,2009
Volume 2,Issue 6
Pages 551-655
Subject Area:Industrial Robot Technology,Grinding Tool

Title: Smart chemical spray system design

Authors: WANG Jinsong, CHE Xiaohe, ZHANG Yan
PP: 650～655
Abstract: For the backwardness of agriculture chemical spray technology and large dosage and unevenness of spraying, this paper proposed a new smart chemical spray system. Through the real-time detection of working parameters during spraying to adjust the spraying dosage automatically, the system could reduce the phenomenon of uneven spraying. Meanwhile, the main parameters in the course of operation could be displayed in real time, which achieved a visual operation. Firstly, according to the factors influencing spraying, it determined a specific implementation plan, and expounded how to adjust the spraying dosage automatically to bring it into correspondence with set value by detecting the operating speed, spray pressure and spray flow of spraying machine in real-time. Then it picked the controller, sensors and electrical control valve, keyboard, D/A converter, A/D converter, LED display and other hardware devices, compiled the control procedures, and achieved the function of automatic spraying.
Keywords: special-use machinery engineering; intelligent control; chemical spray; single chip microcontroller; sensor

Title: Computer simulation on DNA flow around microcolumn in microchannel

Authors: ZUO Chuncheng, ZHAO Yongwu, CAO Qianqian, JI Feng
PP: 644～649
Abstract: This paper studies the flow properties of DNA in microchannel. The multiscale dynamics simulation of DNA flow around microcolumn in microchannel is realized by FEM calculation of flow field and Brownian dynamics simulation of DNA. The simulation results show that there are curl and turn in conformation changes of DNA chain when passing the microcolumn in microchannel, and both interactions of flow velocity and random fluctuation make the DNA chain stretch or contract.
Keywords: fluid power transmission and control; DNA; flow; bio-manufacturing; multiscale simulation

Title: Optical circuit analysis on high-speed camera system using laser as background light

Authors: LI Huan, YANG Zhansheng, LIU Peng, SUN Bo
PP: 640～643
Abstract: The wave and high-speed camera analysis are main experimental methods used to investigate metal transfer in MIG/MAG welding. The high-speed camera analysis has been widely applied because of its directness and availability. Laser is a single wavelength parallel light which is also used as background light in high-speed camera system. This high-speed camera system is an effective test technology to research arc physical phenomena. A linear high-speed camera device with laser as background light has been investigated. It is an important link to adjust laser circuit. Optical knowledge was used to analyze the circuit and improve it so as to get better images of arc shape and metal transfer. The conclusions provide with high reference value on the technique of high-speed camera recording for metal transfer process of arc welding with consumable electrode. This device is applicable to studying welding arc physics and other similar process.
Keywords: welding technology and equipment; laser; high-speed camera system; arc shape; metal transfer

Title: Research on subaperture stitching interferometer method for measuring optical plane

Authors: TIAN Yi, LI Hongyu, WANG Yuezhu
PP: 633～639
Abstract: In order to obtain the whole lens’ surface shape information, measurement of larger diameter optical plane was implemented by using smaller caliber interferometer. Subaperture stitching mathematical model was established. The influence to the stitching result was discussed. One main reason was the tilt and piston in the measuring process and the stitching process. The removing tilt and piston mathematical model was established, and then the model was verified experimentally. Fully utilizing the Matlab software’s matrix operation ability and the MetroPro software data processing technology which matched with the Zygo interferometer, a lens of 150 mm in outer diameter, 100 mm in inside diameter was used in five sub-apertures stitching experiment. Compared with full caliber interference measurement results, the relative error value of PV is 1.05%, and the relative error value of rms is 2.10%. Experimental results indicate that this method is stable, reliable, and may provide the theory support for the large caliber mirror surface’s process and measurement.
Keywords: instrument technology; surface shape measurement; subaperture stitching method; Zygo interferometer

Title: The reserch on method and system for the accuracy test of dynamic rolling-angle detection

Authors: DING Libo, CHENG Xiang, ZHANG He
PP: 625～632
Abstract: The rolling-angle is a key factor for a projectile to control the action time of the attitude control actuator. In order to test the rolling-angle detection accuracy of the attitude sensor mounted in a projectile, the test method of comparing rolling-angle with the reference angle educed from the photoelectric encoder was studied, as well as the synchronization way of different sensor interface. Then, a test system with various types of sensor interface was built, which had the ability of displaying rolling-angle and drawing the error curve dynamically. The result of experiment shows that the test system can achieve the accuracy of ±0.036° when the attitude sensor is rolling at 0～50 r/s, and can be used as a powerful accessory instrument in the study and performance test of various types of attitude sensors.
Keywords: mechanical and electronic engineering; attitude sensor； rolling-angle； photoelectric encoder； test system

Title: Transient characteristic of anode flow field pressure drop in micro direct methanol fuel cell

Authors: LI Miaomiao, LIU Chong, LIANG Junsheng, ZHAO Yinting, SUN Huanli, LV Zhiping
PP: 619～624
Abstract: To tackle with the CO2 removing from the flow field channel, this paper designs a series of anode flow field structures with different dimensions and shapes in micro direct methanol fuel cell (μDMFC). Some μDMFCs running on aqueous methanol solution with a certain flux in anode and air-breathing mechanism in cathode are designed and fabricated. With the pressure drop measure and two-phase flow observation platform, the paper studies the relationship with pressure drop and current density, as well as the relationship with flux and channel width. The results show that pressure drop increases with the increase of current density at lower current, but it decreases with the increase of current density when it reaches a peak value. Pressure drop increases with the flux increasing in channel inlet, but too high or too low flux will decrease full cell performance; it also reveals that the pressure drop variation rate in non-equipotent serpentine channel with 500 μm width is a smallest one, and is beneficial for the CO2 removing.
Keywords: other disciplines of mechanical engineering; anode flow field; pressure drop; micro direct methanol fuel cell

Title: The design of embedded numerical control system based on ARM and MCX314As

Authors: REN Qiang, JIANG Tingbiao YANG Ping
PP: 616～618
Abstract: This paper introduces a new design for four axes embedded numerical control system based on ARM and MCX314As. The master-slave architecture is adopted in this design, ARM is main CPU, and the motion control chip MCX314As is subordinative CPU. The controlling method of MCX314As is very simple. It simplifies the design of the applications and can achieve the linear and circular interpolation of three linkages in four axes. The real-time Linux operation system is employed in the software platform, which can be good at dealing with multitask and ensure the real time performance of motion controlling.
Keywords: mechanical manufacture and automation; numerical control system; ARM; MCX314As; Linux

Title: Developing engineering drawing system by ObjectARX

Authors: CHAO Caixia, WEI Yongle
PP: 611～615
Abstract: This paper introduces the methods of transforming 3D solid modal to 2D drawing in AutoCAD and the steps of creating the three-view drawing of the solid modal by the command of MView. In order to make up for the defects of these methods, using the secondary development tool of ObjcetARX, the engineering drawing system is developed based on the existing function of creating three-view drawing, which realizes quick transformation of the methods. The system has friendly user interface, it can be operated easily and conveniently, and also can reduce many repeated operations, improve the design efficiency. Furthermore, the drawing generates the model space directly, which makes the user’s operation more convenient. The realization of the engineering drawing system proves that developing the application program by ObjcetARX is an effective method of strengthening the system function of AutoCAD, enhancing the design efficiency and lowering labor intensity of the user.
Keywords: mechanical manfacture and automation; computer aided design; engineering drawing; AutoCAD; ObjectARX

Title: U3 smart driver software development base on DAPI

Authors: ZHAO Zhiming, YANG Fuxing
PP: 607～610
Abstract: As the development of the mobile storage, it has came from simple data storage into the stage of storage application. The 3G mobile storage can realize not only data storage, but also all the functions of storing personal working environment. The flash disk becomes a comprehensive storage platform integrates pc configurations, personal applications and some security information. This paper gives an introduction to the structure of U3 platform, discusses the characteristics of application program and how to develop U3 smart driver software with DAPI based on U3 platform. The application based on U3 platform has good mobility and safety. It can meet the requirements of mobile work environment.
Keywords: mechanical manufacture and automation; 3G mobile storage; U3; DAPI; software development

Title: Development of tractor electronic hydraulic hitch system controller based on virtual terminal

Authors: LIN Lin， MAO Enrong， XIE Bin
PP: 602～606
Abstract: Based on the modified TN645 model tractor, this paper developed an electronic hydraulic hitch system controller which was based on virtual terminal. This controller was designed according to the machinery for agriculture and forestry serial control and communications data network (ISO 11783) part 6: virtual terminal. The upward and downward movement of the farming tools can be realized by the switch mode of electromagnetic valve, which is controlled by corresponding output signal calculated by control algorithms of the hitch control system, according to the incoming control message and the value difference of the signal detected by the feedback sensor including ploughing depth and traction force. A 32 bit embedded micro controller (ARM7 LPC2292) which contained 256 KB high speed Flash was used as the core control unit. The hardware included signal input, valve driving, LCD display, operator input control, power module, reset module, clock module and so on. The software included creating and transfer of the object pool, message display, operator input control and so forth.
Keywords: mechanical manufacture and automation; tractor; hitch system; virtual terminal; ARM7

Title: Experiment on bending of Al2O3 ceramic slice with CO2 CW-laser

Authors: WU Dongjiang, ZHANG Qiang, GUO Dongming
PP: 596～601
Abstract: This paper carries out experiments on bending of Al2O3 ceramic slice with CO2 CW-laser at various laser processing parameters, including laser power, scanning velocity and so on. Laser linear energy density is introduced to discuss the best processing parameters, and bending characteristics are briefly analyzed according to the high temperature properties of Al2O3 ceramic. Experimental results show that the Al2O3 ceramic slice can be bent by CO2 CW-laser, and the bending angle can reach up to 2°. Laser bending processing of Al2O3 ceramic slice is strongly sensitive to temperature, and there exists a critical temperature, above which, the bending angle increases greatly. The best range of laser linear energy density for bending Al2O3 ceramic is 17～24 J/mm.
Keywords: mechanical manufacture and automation; non-traditional machining; laser bending; Al2O3 ceramic; temperature sensitivity; plastic deformation

Title: Development of computer numerical control system based on CORBA component model

Authors: ZHANG Fengli, ZHANG Chengrui, ZHOU Peng
PP: 589～595
Abstract: Based on detailed analysis of the research actualities, taking advantages the experience of OCEAN, OSACA projects and combining with principles of CORBA component model development, this paper analyzes the functions of one common computer numerical control (CNC) system, then proposes one components model for the system. This paper accurately defines each component’s functions and definitely points out the intercommunication among components. Finally, the overall development process is introduced including the implementation, package, assembly and deployment of involved components.
Keywords: mechanical manufacture and automation; component; CORBA; interface definition language; component implementation definition language

Title: Study on balance precision of high speed grinding wheel system

Authors: XIU Shichao, LIU Jian
PP: 585～588
Abstract: There is a heavy effect of the unbalanced centrifugal force on the safety and processing quality of high speed grinding wheel system. The alternating radial force can not only push the spindle and bearings failure, but also generate the grinder vibration, decrease the machining precision and wheel life, even cause safety accidents. This paper analyzed the balance precision and grade of high speed grinding wheel and its effect on grinding performance analyzed. The unbalance causes of high and super high speed grinding wheel were discussed too. The evaluation and selection for the balance precision of high and super high speed grinding wheel were studied. Furthermore, the paper analyzed the principle and significance of dynamic balancing technology of high and super high grinding wheel.
Keywords: mechanical manufacture and automation; grinding wheel; balance precision; high and super high speed grinding

Title: Study on implementation method of Weibull distribution parameter estimation in Excel

Authors: SHI Jingzhao, HUA Hengming, LI Xiangfu
PP: 579～584
Abstract: The parameter estimation of 3-parameter Weibull distribution is very complicated, and most estimation methods need programming calculation. This paper derives the formula of solving the location parameter of 3-parameter Weibull distribution by relative coefficient optimization method and uses the powerful programming solver of Ms Excel to solve the formula, thus it realizes the non-programming solution of location parameter estimation. Meanwhile, it achieves the non-programming solution of shape parameter and scale parameter by using the chart features. Examples prove that the method is easily accessible and efficient, and can meet the estimation precision.
Keywords: mechanical design; reliability; Weibull distribution; parameter estimation; Excel

Title: Research on the moving characteristics of the continuously variable transmission

Authors: ZHAO Junpeng, NONG Kejian, WEI Wenjun
PP: 574～578
Abstract: Based on the circle vector function, this paper sets up the mathematical model of the continuously variable transmission (CVT), and shows the regularity equation of the angular displacement and angular velocity of the transmission’s export. Using the Matlab, the curves of the regularity are obtained. And then with the analysis to the regularity and the factors impacting the export, the ones (link 2 and link 3) which affect the quotiety of the velocity pulsation most have been put forward. And it is the condition of the zero export that point O3 and point C are in the same position.
Keywords: mechanical design; circle vector function; the continuously variable transmission; the quotiety of the velocity pulsation; zero export

Title: Dependent failure reliability model of pipeline system based on statistics average algorithm

Authors: HAO Guangbo, XIE Liyang, HE Xiuyun
PP: 566～573
Abstract: This paper presents a method to evaluate the pipeline reliability of continuous system. The pipeline is considered as series system behind dividing the system into segments, two influence factors of material strength dispersion of pipeline are discussed, such as material inhomogeneity and material quality instability, and dependent failure reliability model of series system is analyzed based on minimal sequence statistics model. Next, the reliability model of pipeline is presented, which reflects the failure dependent of segments and influence factors of material strength dispersion based on statistical average idea, and is validated by Monte Carlo. Last, the dynamic reliability model of pipeline system is also proposed considering strength degradation with time, and the change law of system reliability is simulated.
Keywords: mechanical design; pipeline system; dependent failure; statistical average; strength dispersion; Monte Carlo

Title: Study on tribological behavior optimization of water-lubricated bearing material

Authors: WANG Jiaxu, XIAO Ke, HUA Xijin, LI Min
PP: 559～565
Abstract: Water-lubricated compound rubber bearings are generally widely used in many engineering fields such as shipping, machinery, petroleum industry, chemical industry, water conservancy, agriculture mining and so on. Taking tensile strength, tear strength, stretching stress and hardness as performance index, this paper studied the material modification of water-lubricated rubber bearing, including the influence of reinforcing agent, soft agent, vulcanized agent, fiberglass, carbon fiber and nanometer zinc oxide whisker. Result indicates that the carrying capacity and tribological properties can be well improved when chaging the materials of water-lubricated compound rubber bearings. The work offers theoretical argument for technological design and practical application of water-lubricated compound rubber bearing.
Keywords: mechanical design; water-lubricated bearing; optimization; material modification

Title: The thought and countermeasure of industry design promoting Chinese economy development

Authors: ZHENG Tingxing, HU Guotang
PP: 551～558
Abstract: This paper discusses the relationship between industry design and economy development, and analyzes the present condition and problems of industry design development and Chinese economy construction, It indicates that industry design is the accelerator for Chinese economy development, and lists the condition of Chinese industry design, the problems of the Chinese industry design development and the development of business design activity. It concludes that in 21st century, by developing industry design, promoting technology innovation, making business industry design better and localizing the design in market, developing the situation and function of industry design in globalization, the new situation of the whole society advocating industry design and enterprises valuing industry design can be constructed, which makes industry design promote Chinese economy development.
Keywords: mechanical design; industry design; Chinese economy; development

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