Advanced Materials Research Vols. 230-232

Abstract: The working mode of constant-pressure radial piston pump includes the mode of constant flow and constant pressure. The dynamic model of stator vibration was established and the analysis was made on the stator vibrating velocity in frequency domain to the two modes. Measurement mechanism was designed to test the vibration of stator of JB32H-type radial piston pump. It is concluded from the analysis and test results that the velocity of stator vibrates periodically on the two modes. Stator velocity vibrates in the range of higher frequency on the mode of constant flow than on the mode of constant pressure. The conclusions are helpful to the noise control of piston pump.

Abstract: By simulation experiments, the relation between the starting friction torque of a blade bearing and the overturning moment is explored in order to disclose the nonlinear evolution characteristics of the sample mean and variation coefficient of the starting friction torque. Via the variation analysis of the test data, the result indicates that with the rise of the overturning moment, the sample mean is nonlinearly increased and the sample variation coefficient is nonlinearly decreased in view of the overall situation, at which there is a sensitive spot where the sample variation coefficient makes larger abnormally. This is a new discovery. Perhaps it can lay the foundation for analyzing the starting friction torque measurement system and for designing the blade bearing system.

Abstract: Deformation of the flange in the deep drawing of box-shaped parts was studied. The forming of box-shaped parts was simulated through numerical simulation software DYNAFORM, and hardness of box-shaped parts was measured with a hardness tester. The results shows that, the sheet thickness near the midpoint of straight edge is more lager than near the corner, and flow stress is small, indicating that plastic deformation is not sufficient. Sheet thickness of box-shaped parts of large aspect ratio is relatively large, and sheet flow is difficult, which is not conducive to forming. In the experiment, the hardness of rounded corner part is significantly greater than two adjacent straight edges at the same height, which shows that material flow of the rounded corner part is good and hardening phenomenon is obvious, and the maximum hardness is near the entrance to the die corner. The flange deformation of box-shaped parts of the experimental and numerical simulation is the same.

Abstract: The application of GIS (geographic information system) and webservice in travel information field is an inevitable trend. WebGIS is a type of GIS, integration of these two technologies. This paper provides an overview and information useful for approaching WebGIS. And, the system was described for travel information based on WebGIS. According to the requirements of visitors, a model is created to meet their needs, so the information which displayed on the web can be update. Then, the use of the method was discussed, and some technique were used to analyze data which collect form users. Java Script Object Notation (JSON) was used to transfer the data between server and client. Finally, Custom Personalized Travel System was displayed.

Abstract: TiN coating was deposited on 3Cr2W8V alloy by PVD and then processed with electron beam surface alloying process. The microstructure, microhardness, friction coefficient, amount of wear and corrosion resistance of electron beam treated specimens were investigated. It is shown that the electron beam treated specimens can improve the properties of material. The coating has an average microhardness of approximately HV800, the friction coefficient of electron beam irradiation treated specimens is considerably lower than that of TiN coating. When the electron beam irradiate times is appropriate, the roughness of surface will much lower, and it will achieve polishing effects. The corrosion behavior of the composite coating in 3.5% Nacl solution at room temperature was also determined using a potentiont state system. In comparion with the corrosion potential for 3Cr2W8V alloy, the corrosion potentials of TiN coating and electron beam treated specimen are increased respectively. The electron beam treated specimen has the lowest corrosion current density as well as the highest corrosion potential showing an improved corrosion resistance compared with 3Cr2W8V alloy.

Abstract: Using a variety of halogenated treatments (fluoridation, bromide treatment, iodide treatment and others) on the surface of nitrile rubber, explore the reaction mechanism and its effect on the friction properties of nitrile rubber. The results showed that halogenated treatments on the surface of nitrile rubber can significantly improve the friction properties: the roughness of treated rubber surface becomes better and the density of surface increases, friction coefficient and wear significantly decrease. Among them, the fluoride treatment is the best, followed by mixture treatment, bromide treatment is relatively little worse.

Abstract: For existing cable structures, vibration frequency method (VFM) seems to be the common way to determine the tensile force of the cables. However, the applicability of this method is limited by the specific conditions of cables. Only well tensioned slender cables with simple boundary conditions can be measured through VFM directly without causing much error. In this paper, the vibration mode of the cable is measured and then cable tension is calculated via energy conservation principle.

Abstract: This paper proposes integrated video techniques, cloud computing, and multisensor data fusion for remote services over Internet. The proposed remote service approach includes three levels of different remote diagnoses: Level (1): Video and audio interaction between customer and remote service sites; Level (2): Signal and data collection from customer to remote service sites; and Level (3): Multisensor data fusion at cloud computing server. The proposed remote services have been successfully tested and evaluated for its performance: (1) 85% of technical manpower saving, (2) 90% of service response time saving, (3) 60% of maximum time to recovery (MTTR) saving, and (4) 95% of service cost saving. In the near future, we intend to implement automated diagnosis and repairing suggestion mechanism to further improve the efficiency of technical manpower of the proposed remote diagnosis and maintenance cloud platform.

Abstract: The experiment discusses the issue of high-energy implant to the resist thickness and how the resist etched away during implantation process. The resist that is use as a mask or material to block the dopant ion such as Phosphorous, Boron or Arsenic introduces into silicon substrate. It is a common practice by all semiconductor industrial players to use photoresist as their protection on desired area in which purposely set as non-implanted area. The research benefits the engineer on determine the sufficient photoresist thickness for specific implant energy.

Abstract: In order to simplify previous camera calibration method, this paper put forward an easy camera calibration method based on plane grid points on the foundation of Heikkila plane model calibration method. Intrinsic and extrinsic parameters of the camera are calibrated with MATLAB, then the rotation matrix and the translation vector are calculated. The experiment results show this method is not only simple in practice, but also can meet the needs of computer vision systems.