Advanced Materials Research Vols. 301-303

Abstract: The meteorological information for atmospheric environment's most basic information, contains the temperature, important items and so on, barometric pressure, wind direction, wind speed, stability, mix level altitude, the content is diverse, and the material quantity is huge. Because the meteorological condition to includes the nuclear radiation and the biochemistry pollution proliferation has the quite important influence, under the limited transmission space and the time condition, how to establish an optimization the meteorological information, take grasps the related meteorological essential factor as this research discussion key point. This research unifies the SCIPUFF nuclear pollution proliferation analogous system, the analysis different meteorological factor to of analogue result the pattern influence, grasps the meteorological essential factor. In the SCIPUFF nuclear pollution proliferation analogous system meteorology mold train application, compared to demonstrated analysis of by way of the meteorological factor to the result that the atmospheric environment meteorological factor besides the wind speed and the temperature, the atmospheric stability also for the essential factor which essential has, enables the pollution proliferation analogous system to have the best simulation effect. Simultaneously when has also confirmed the pollution proliferation, is by the low wind speed, the high stability atmospheric condition may create the best diffusion effect. In addition, the mix level altitude to pollutes the proliferation the influence function not, if the atmospheric stability is obvious, the primary cause is mixes the level altitude the performance also to conceal the atmospheric stability essential factor result.

Abstract: A method based on Hall sensor is presented in order to measure pulsed current. Measuring device, which is based on CS3500 series linear Hall-effect ICs, is designed and calibrated. 4.3/102μs pulses are applied to the measuring device. Test results show that this device can well reproduce the shape of the measured current, and the maximum peak amplitude of the pulsed current that the device can measured is 83.3kA.

Abstract: This paper presents a new approach to build prototypes of Wireless Sensor Network rapidly based on virtual instruments technology. There are two different methods introduced in this paper. One of the two methods uses WSN (short for Wireless Sensor Network) Node and WSN Gateway manufactured by NI (short for National Instruments). The other method adopts Compact RIO (short for Reconfigurable Input and Output) and GPRS (short for General Packet Radio Service) module. Though they are two different methods, they have the same structure. Both of the two methods adopt DAQ (short for data acquisition) card and sensors to acquire specified data. The DAQ card and sensors compose a node which can sense and process data. Different nodes form a local area WSN. Nodes within a local area WSN communicate with each other via ZigBee or other means of communication. The local area WSN can access the Internet via a WSN Gateway or GPRS module. Modular hardware and graphic programming language LabVIEW (short for Laboratory Virtual Instrumentation Engineering Workbench) are adopted in this proposed approach.

Abstract: Now the Mechanical Properties of fabrics is widely studied, but always involve in one kind of fabric or a certain property. In order to further understand the fabric tearing strength comprehensively, through a lot of experiments, this article mainly study the single or multiple influences of warp and weft fineness, warp and weft density, warp and weft yarn strength, break elongation of warp and weft yarn, fabric thickness of five fabrics on single stitch tearing strength and trapezoid tearing strength. Then we use SPSS statistical analysis tools to conduct multiple linear regression analysis. We can conclude that warp and weft tightness of fabrics, warp yarn strength, elongation at break of weft yarn have the influence on tearing strength; When trapezoid Angle is changed from 27 degrees to 45 degrees, the influence of warp and weft tightness on it will become bigger, but the influence of warp yarn strength, elongation at break of weft yarn on it will become smaller, and so on.

Abstract: To select appropriate diameter of end mill using in rough milling for complex pocket with islands and free form surfaces, an approach of automatic measuring minimum distance between profiles at cutting area is proposed. After obtaining disordered curves from some intersection plane, recognizing loop algorithm and differentiating inner and outer profiles algorithm are developed. Based on the recognized inner and outer profiles, the minimum distance between them can be measured automatically. Case study conducted feasibility and effectiveness of the proposed approach.

Abstract: To select appropriate diameter of ball mill using to remove all step profiles for complex pocket with islands and free form surfaces in semi-finish milling, an algorithm of obtaining the diameter of maximum ball mill is proposed. Based on the character of semi-finish milling, the select criterion is built. After testing the approximate depth per cut for each step profile, the minimum value is used as the threshold to select maximum diameter of ball mill. Case study demonstrated its feasibility and effectiveness of the proposed algorithm.

Abstract: By using of high-speed camera on the experimental platform of gasoline flame propagation, gasoline (93^#) flame shape and propagation characteristic have been studied under different propagation angles. Experimental results showed that, an orange main flame zone and a blue flashover flame zone were observed in gasoline flame propagation processes; as the angle between propagation direction and horizontal plane increased gradually, the fluctuation range of the main flame narrowed gradually in perpendicular to gasoline surface direction, the speed of the main flame forward propagation tended to be uniform and the average value of it increased gradually in parallel to gasoline surface direction.

Abstract: The vibrator wireless monitoring system is designed based on Zigbee and the theory of compressive sensing. This system consists of the sensor wireless acquisition device, the vibrator wireless automation recorder and the vibrator remote management computer. Different modules of the system communicate via the Zigbee wireless network. The data to transmit is compressed by applying compressive sensing technology. As result, the quantity of the data transmition decreases sharply with the reliability and real–time operation being ensured. The system is already in use and the effectiveness is proved.

Abstract: Comparison test method is used to study the effect of pulley diameter and lubricant grease on multi-layer winding wire rope’s fatigue endurance. The investigation indicates that the fatigue failure behavior is closely related to spatial location where the wire rope is in drum; the occurrence and development of broken wires follows regularly. The fatigue endurance of multi-layer winding wire rope is little influenced by lubricant grease, which is greatly affected by the diameter ratio of pulley to rope in multi-layer winding. The results have important reference value for the reliability design of multi-layer winding wire rope.

Abstract: The uniaxial rotary SINS has quickly become the new focus of inertial system research for its low price and high navigation accuracy. A higher precision requires an accurate calibration for the system. In this paper, the output models of uniaxial rotary SINS are derived, and the FOG and accelerometer are calibrated using discrete calibrating method.