Advanced Materials Research Vols. 718-720

Abstract: When porcelain insulator operates in a harsh environment for a long time, it will cause leakage current increase, and lead to heating phenomenon. As a result, the temperature of porcelain insulator can be changed, which probably due to crack, breakdown or other factors. In order to reflect the working state of the porcelain insulator, to monitor the temperature of porcelain insulator, optical fiber Bragg grating temperature sensors are installed respectively on the steel cap and the porcelain of porcelain insulator. In the interaction of industrial frequency voltage test of 15kV, thus the temperature of porcelain insulator can be distributed. The temperature of the porcelain insulator affects the center wavelength of optical fiber Bragg grating temperature sensors, which are installed on porcelain insulator. The tests show that in the pure condition, the temperature of porcelain insulator's steel cap and porcelain respectively rise 1.4°C and 1.5°C, in the polluted condition, the temperature of porcelain insulator's steel cap and porcelain respectively rise 5.8°C and 6.3°C, in the pollution level II condition, the temperature of Porcelain insulator's steel cap and porcelain respectively rise 6.8°C and 7.2°C. Therefore, by using optical fiber Bragg grating temperature sensors to monitor the change of porcelain insulator's temperature, combined with the researches of temperature characteristics, can directly reflect the porcelain insulator's working situation and real-time online monitoring.

Abstract: Vehicle collision sensor system and reporting accident to police is an electronic device installed in a vehicle to inform police man in case of accident to track the vehicles location. This system works using pressure sensor, GPS and GSM technology. These technology embedded together to sense the vehicle collision and indicate the position of the vehicle or locate the place of accident in order to solve the problem immediately (as soon as possible).For doing so AT89S52 microcontroller is interfaced serially to a GSM modem, GPS receiver, and pressure sensor. A GSM modem is used to send the position (Latitude and Longitude) of the vehicle, the plate of the vehicle and the SMS text from the accident place. The GPS modem will continuously give the data (longitude and latitude) and Load sensor senses the collision of the vehicle against obstacles and input to microcontroller. As load sensor senses the collision, the GSM start to send the plate of the vehicle, text message and the position of the vehicle in terms of latitude and longitude in real time.

Abstract: This paper analyzed the high-density circular laminar jets fluidity in the Normalizing Furnace Accelerating Cooling (NAC) system of TISCO. The FLUENT analytic software for fluid is used to do the numerical simulation. Comparing the simulation result with the theoretical analysis and headers actual water situation, verify the correctness of the simulation result, study water convexity of different boundary condition, and analyze the water uniformity in different parts of the header.

Abstract: The dynamic mechanical characteristics of LIGA nickel material are investigated by using a small split Hopkinson tensile bar apparatus (SSHTB). The strain rate related stress-strain curves of LIGA nickel are obtained and with which the dynamic mechanical characteristic parameters of LIGA nickel material under different strain rate are acquired. Meanwhile, the paper draws the conclusion that the dynamic mechanical characteristic parameters of LIGA nickel material increase with the increasing of strain rate by the experiment, which provides a theoretical basis for better application of LIGA nickel material under dynamic load conditions in Micro-electromechanical Systems (MEMS).

Abstract: This research presents the design and development of a FriendlyARM-based color to frequency representation for media packaging color detection used in small media packaging industrial. The design was based on FriendlyARM Mini 2440 SBC (Single-Board Computer) with 400 MHz Samsung S3C2440 ARM9 processor and the color sensor used in this research was a programmable color light to frequency converter model TCS230 made by Texas Advanced Optoelectronic Solutions (TAOS) company. The frequency information gathered was used to create color to frequency representation. This research study in 4 filter modes: red, blue, green and non filter. Calibrate each CMYK color with standard color checker chart in difference mode. The results of study, the non filter mode can give the results better than red, blue and green mode. The output frequency span between color are 7.432 kHz, 3.5 kHz and 21.31 kHz for Black-Cyan, Cyan-Magenta and Magenta-Yellow frequency spans respectively compared to other filter modes. The advantage of this research are reduce the use of memory for storing the CMYK color data and can speed up the time of restoring and inspecting colors used in media packaging processes.

Abstract: Red blood cells suspension was infused into the microchannel in micron-sized made of PDMS and this leaded to the collision between the red blood cells and the wall of the microchannel. The microflow video was observed and recorded with optical microscope and high-speed camera used. The visualizing of the movement and collision of red blood cells was achieved. The flow images were optimized and the values of the geometric parameters of the red blood cells at different positions were obtained. Combined with the experimental data, the fitted curves of the geometric parameters on the axis of the microchannel were achieved. Besides, the comparison among the flow characteristics for different flow rates was also completed. It turned out that the width of erythrocytes in the microchannel increased and the length decreased continuously along the flow direction, so did the elongation. Erythrocytes gradually developed into tabular shape from initial slender shape along the flow direction. Whats more, the trends of the geometric parameters at different flow rates showed obvious similarity.

Abstract: The fully-leaky waveguide technique has been used to explore the director of inverse twisted nematic liquid crystal cell. The reflection data, including all the polarization-conserving signals Rpp and Rss as well as the polarization-conversion signals Rsp and Rps, are recorded under various voltages applied to the cell of 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, and 7.0V (rms), at a frequency of 1kHz. We found that this technique was sensitive to the director changes, especially for the polarization-conversion signals. Then by fitting angle-dependent reflectivity data to modeling theory, the arrangement of the director and some importance parameters of liquid crystal cell are obtained. It is proved that the reflectivity of fully-leaky waveguide mode can give the imperceptibility change in the cell.

Abstract: Grating lobe effect often exists in the measurement and simulating of phased array antenna's directional pattern. The emergency of grating lobe effect often leads to angle multi valuedness, which will result in the receiver error tracking the grating lobe. The traditional papers mainly focus on the grating lobe effect of linear phased array antenna, whereas pay little attention to the planar phased array antenna. Thus, in this paper, the cause, location and avoidance of grating lobe effect of planar phased array antenna are investigated in theory and the correctness of conclusion was verified by using simulation experiment. The result shows that the method proposed in this article will play a guiding role in engineering practice of restraining the grating lobe effect.

Abstract: The progression of application software and high-speed Internet access has, in general, the ability to commonly engage synesthetic experience. However, current synesthesia systems do not meet their full potential, as they are restricted by the simple display of non-intelligent two-dimensional form. This paper is going to present a system for enhancing visual and auditory attributes connection by augmenting the traditional sound visualization system with natural perceptual properties beyond two-dimensional space. A method of expanding the analysis capabilities of the system over changes in the frequencies and sound pressure levels of the live environmental sound stream was explored. With this method, a semantically rich four-dimensional form of sound containing information regarding audio properties and location could be generated. Some specific scenarios are discussed in order to explore visual form of natural perception of environmental sounds, multimedia voice and musical performance.

Abstract: This paper established the Ultra-High Voltage DC Insulators Long Term Running Research Platform in the National Engineering Laboratory for UHV Engineering Technology (Kunming). The research platform included the following parts: the long-term live examination field for UHV DC equipments, the UHV DC insulators, the leakage current on-line monitoring equipments, the wireless automatic weather station, the infrared monitoring and the ultraviolet monitoring system. The data were real-time processed by the software of the UHV DC insulator information synthetic evaluation system.