Advanced Materials Research Vols. 926-930

Abstract: Focusing on the problem that the modern anti-riot helmet has been revealed a number of deficiencies such as poor performance under impact, the material of helmet shell is analyzed based on numerical simulation in this paper. A finite element model of anti-riot helmet and simple finite element models of head, trunk and blunt object are established by CAD software and ABAQUS software. PP, PC and ABS are chosen as three different engineering plastics for anti-riot helmet shell material, and then carry a numerically simulation on the process of anti-riot helmet impact moment. Results show that the overall system kinetic energy curves present overall downward trends firstly, then present irregular waves with smaller ups and downs. PC is a more excellent helmet material while comparing to PP and ABS.

Abstract: This paper takes the light geodesic instrument as the research object, puts forward a design idea of the semi-physical simulation training system based on the virtual scene and realizes three-dimensional modeling, real-time scene drawing and real-time data driving display through Virtools and Visual C++. ARM7 and the general-purpose single-chip microcomputer are adopted to realize the function simulation of the equipment. This simulation training system has the characteristics of low cost, low power consumption and high simulation degree.

Abstract: Mechanical properties of MEMS materials is one of MEMS important basic theory research, including hardness, elastic modulus, yield strength, tensile strength, fatigue strength and other performance indicators. For the acquisition and processing of weak signal can meet the system, this paper designs a measurement and control system which has a common set of software and hardware of high speed, high accuracy, high reliability in one. This tester is mainly composed of four parts: precision positioning subsystem, specimen clamping subsystem, load/displacement measurement subsystem and measuring and controlling subsystem, which provides a solid foundation in higher positioning accuracy of measuring MEMS materials and benefits more for further research.

Abstract: MCGS could provide most drivers for any commonly used peripherals and it also need users to develop drive components based on their own demands because of the variety of its equipment.In order to meet the monitoring requirements of general users, this paper chooses the 51 series microcontroller general script driver which has widely used in system development. This paper designs the motor control and shaft temperature detection application system using MCGS and 51 single chip microcomputer, and this system get the satisfactory result of monitoring in the industry. Based on this, the script driver with validity and generality.

Abstract: Distortion produced by optical system makes the image of object in linear CCD deviate from the theoretical point and lead to the system measuring error. According to the digital image processing, a high-precision calibration method is proposed. The imaging measurement system is calibrated through two steps: firstly, use laser collimation to detect the principal point for a large visal field camera lens with short focal distance. Secondly, use a rectangular gidding target to get lens distortion coefficient.

Abstract: Kinect, as an individual feeling surrounding peripherals, not only changes the users' entertainment experience, also provides a new way between users and machine interaction. Using easily and improving the gesture recognition accuracy, the paper presents a method that a device sensors are used to get the more than 20 joint point information, and a specific position is distinguished by the Euclidean distance and Angle of each joint point. The result shows that the recognition rate is higher using the method to identify the position and extension action library is used to meet the needs of determining different positions at any time. On this basis, the paper has been implemented in various fields or carried on the beneficial exploration of possible application.

Abstract: Three-dimensional normal grain growth has been simulated in scale 300×300×300 using the generally accepted Potts model Monte Carlo method. The studies of the topology of grains indicate that the mean number of faces in the grain network =13.91 is similar to other simulation results, but higher than most of the experimental data which containing a wide range of values, i.e., =11.16~13.93. The three-dimensional AboavWeaire law and Liu-Yu law are observed to hold, but the fit coefficient is different from the theory models.

Abstract: According to the question that the situation of logistics goods warehousing and storage environment needs to be detected real-timely. puts forward overall design scheme of remote management system for logistics warehouse, the situation of logistics goods warehousing can be tracked by using electronic tags, storage environment parameters is collected by combining with the ZIGBEE wireless technology, if parameters is not appropriate, the system alarm timely. Remote data transmission using 3G way, without complex wiring, the paper analyses the hardware and software design of the system in detail, and introduces the RFID anti-collision algorithm.

Abstract: ZigBee wireless networks can be used for locating the objects monitored inside the building, in which the location method based on RSSI (Received Signal Strength Indicator) has a broad range of application. For the complex spatial environment of the building, a three-dimensional localization algorithm will be proposed in this paper which can achieve high accuracy of location, meanwhile mitigate the impact of the RSSI error on the location results efficiently. This method is applicable to the NLOS environment in condition of multi-barrier.

Abstract: According to the cooling performance curve of quenchants method, design a measurement device of cooling performance of quenchants based on microcontroller. The structure, hardware and software design and realization, data analyzing and processing and output were described. Through the thermocouple signal acquisition and conversion, acquire the temperature and display real-time, then process the data and calculate the biggest cold speed and other parameters, finally print out the accurate and reliable cooling performance curve through the serial port printer