Advanced Materials Research Vols. 301-303

Abstract: Little attention has been paid to the nano-TiO₂ as corrosion inhibitor before. In this paper, Myristic acid-modified nano-TiO₂ (MA-TiO₂) were synthesized by Myristic acid and tetrabutyl titanate via the sol-gel method, and it was characterized by IR and TEM. MA-TiO₂ was dispersed in oil, and used as a corrosion inhibitor. From the Tafel plots and EIS spectra, we can know that the values of the current densities decreased by the addition of MA-TiO₂. Because of the MA-TiO₂ formed a deposition layer in the surface of 45^# carbon steel panels, the current density of the the base oil with MA-TiO₂ is much smaller than the base oil. The inhibition efficiency was over 90% with added 5 wt % TiO₂.

Abstract: The paper reports the setting up of a model of fluid dynamic for GaN HVPE system and the simulation. The deposition of GaN with the variation of the gas flow inlet velocities is investigated. The influence of diffusion coefficient on the deposition of GaN is also discussed. It is found that the influence of the gas flow inlet velocities on the deposition is large and the influence of diffusion coefficient on the deposition of GaN is small in vertical HVPE.

Abstract: High power LED is a kind of ideal green lighting source, which owns longer life, higher efficiency and lower electricity power consumption than incandescent lamps and fluorescent bulbs. Constant current driver is the most key factor for high power LED’s premium properties. Based on the specific chip LM3478, a novel Boost DC/DC converting circuit to drive LED was proposed. The whole circuit structure was simple, and owned high reliability with over current protection. The circuit operates continuous current mode (CCM), with normal supply voltage 12V. The constant output current is 700mA, which can drive two-row LED series, 5 LEDs at least each series. The test results show that the electricity efficiency is up to 93.20% and that the output current deviation is 7.71%. The operating temperature range is -40~+125°C.

Abstract: In connection with the model of the turbine blade to be maintained, the path planning technology for the welding robot is researched. By using Solidworks, the model of the turbine blade is layered and dispersed. According to the analysis of the main function of welding robot’s offline programming system, path planning and torch pose planning are designed for blades maintenance. According to the characteristics of simulation data, the result shows this program is valuable for turbine blades maintenance based on welding robot.

Abstract: This paper conducts research on expendable current profiler measurement. According to the principle of expendable current profiler measurement, this paper builds a mathematical model and discusses the composition of the system as well as the design of the sensor electrode on this basis. At the same time, against its complex work environment, it provides the neural network modification algorithm with the generalization ability, constructs the network model and carries out data modification test using this algorithm, finally it discusses part of the experimental data of the system. Through the analysis of the experimental results, it elaborates the advantages of the system and indicates the future research direction.

Abstract: According to characteristic of wind turbine vibration signal, base on the length fractal dimension principle, carry out quantitative description of length fractal characteristics to nonlinear signals on the fault generated by the wind turbine blades. The test and calculation results show that when the different wind turbine blades failures occur, the length fractal dimension value appear clear rules. Therefore, we can use the length fractal dimension effectively extract the fault character parameters of wind turbine blade.

Abstract: An intelligent recognition algorithm of the combination of image edge detection and image area segmentation is designed in this paper. The image edge detection adopts the edge detection method of color feature space. The color multi-threshold region segmentation method is used the image area segmentation. The algorithm is mainly used for the detection and location of city road traffic signs. Some traffic scene images are processed by this algorithm. The simulation results show that the combination algorithm has better segmentation ability. It is helpful to realize the intelligent recognition of road traffic signs.

Abstract: The paper presents the measurement system of the air plane fuel mass consisting of cylinder shell resonating density meter and double cylinders capacitance level meter. The finite element analysis method of ANSYS10.0 is used to analyze the performance of cylinder shell resonator density meter and double cylinders capacitance fuel level sensor. On the base of simulation, the cylinder shell is 45mm in length, 9mm in radius, and 0.08mm in thickness, the material is 3J53; the double cylinders capacitance is 8mm in inside diameter, 23.6mm in outside diameter, and 550 mm in length. The experiments show the uncertainty of cylinder shell resonating density meter is only 0.12%, the uncertainty of double cylinders capacitance level meter is only 0.2%, and the uncertainty of the fuel mass measurement system is 0.4%.

Abstract: This paper designs a measurement system of energy consumption for clothes model controlled by robot technology, the system uses DC motor regulated by PWM regulator to drive the worm wheel reducer and the sinusoidal mechanism, then to drive the robot legs to swing forward and backward in sinusoidal step. The sensors detect the rotation speed and torque of the sinusoidal mechanism, the power and energy consumption. The experiments show the system is high in accuracy, excellent in repetition, and suitable for the further research on the principle and evaluation system of the clothes energy consumption.

Abstract: This paper introduced an apple quality detection and specie identification system based on multi-spectral imaging. Under an international mixed light illumining, system can capture red, green and infrared images of apples at the same time. A software programmed based on Matlab 6.5.1 is used for image processing to complete the detection of quality and specie. According to processing results, the subtotals and classification are made into grading standards. These can be quickly and easily applied to the automation of agriculture fruit grading system. In the experiment, some most common apples including Fuji apple, Red delicious apples, Green apples, Gina Apple's were detected for quality and variety . Accuracy rate can be more than 90%.