Applied Mechanics and Materials Vols. 427-429

Abstract: Radio frequency identification (RFID) can effectively get the accurate location information for indoor tracking system. The readers cant be placed at any position in the practical system. the reader would be more intensive at some places, where will obtain measurements from several readers, while the reader will be placed less at others place, where less or no measurements may be get when the target gets in this area. Therefore the target trajectory should be estimated by fusion filtering methods with variable sensors. The experiments show that the fusion UKF with variable sensors can overcome RFID nonlinear is smooth without abrupt change, even when the number of sensors has undergone great changes.

Abstract: At present, there are some shortcomings in tower crane protect device. In order to reduce the difficulty of the operation, and ensure the safety of the crane, we design this monitoring system. For the purpose of improve tower crane self-control ability and self-diagnosis ability .we propose a design of tower crane monitoring system , a combination of sensor technology and wireless technology. We choose the stm32 as the master chip, and choose uC/OS-II as the operating system. All kinds of tasks could coordinate with each other, and orderly operation. UCGUI is used to realize human-machine interface. It can display real-time operating parameters of the tower crane. The central monitoring room can monitor multiple tower cranes through wireless communication technology.

Abstract: Multiple input multiple output (MIMO) wireless communication system can increase system capacity enormously. Maximum likelihood (ML) detection algorithm can obtain the optimal detection performance with exponential computational complexity that results it difficulty to use in practice. Classical ordered successive interference cancellation (SIC) algorithm suffers from error propagation and high complexity, so an improved parallel SIC algorithm based on Maximum likelihood (ML) detection is proposed, in which signal detection is performed at two stages. ML detections for one layer is carried out firstly, and redundancy of candidate sequences are selected to perform parallel detection for improving detection performance for next step. Sorted QR decomposition based SIC algorithm are performed in second step in order to reduce calculating complexity. By adjusting the number of candidate sequences, tradeoff between detection performance and calculating complexity can be obtained properly.

Abstract: This paper introduces a design of a STC89C52 microcontroller as the main controller, the motor speed is measured by the Hall sensor. This design uses integrated Hall sensor, which has a frequency response, high precision and anti-interference ability. This article describes the working principle of the method and method of use of the Hall sensor measurement speed

Abstract: Optimization of network scheduling is a significant way to improve the performance of the radio frequency identification (RFID) networks. This paper proposes an improved particle swarm optimization algorithm (PSO). It uses an animal foraging strategy to maintain a high diversity of swarms, which can protect them from premature convergence. The proposed algorithm is used to optimize the network performance by determining the optimal work status of readers. It has been tested in two different RFID network topologies to evaluate the effectivenesss. The simulation results reveal that the proposed algorithm outperforms the other algorithms in terms of optimization precision.

Abstract: This paper describes a physical training device based on SST89C51 MCU and used to solve the current problems in the physical training. It also presents details on how to select materials about the device and how to design the software and hardware. The results show that this system has many advantages, such as high speed, high precision, low cost and stability So it will have good market prospects.

Abstract: Thanks to the sensors Wireless Sensor Networks (WSNs) nodes are provided with, and to their offer capabilities and ubiquity, these networks become extremely suitable for many applications that conventional wireless or cabled networks are unable to handle. One of these still underdeveloped applications is monitoring hydrologic stations. This is an especially interesting application regarding their water level or rainfall, for any detected hazardous parameter can be notified not only to the hydrologic station as a warning, but also to any third party that may be helpful under critical circumstances, such as related hydrologic stations or water conservancy department. We build and deploy a system to monitor the water level data from gauge stations in the Taihu Lake. Along with our middleware developed, sensors have been deployed by uses of several nodes conducting as the nodes of a WSN. The hydrologic data extracted from the environment, combined with the information get from the hydrologic station, will constitute the basis of the services that can be achieved.

Abstract: This paper introduces a design of the High Precision Electronic Scale Design Based on MCU, Hardware circuit reaches data processing by the control unit which based on MCU, and The MCU gathers data by weighting sensor, then the LM331 makes V/F transform, and the transformed data then transferred to MCU for display processing. At last, the LCD would show it out steadily without twinkling. The paper mainly puts forward the scheme and software design idea, hardware design.

Abstract: Harmonic rejection ability and reflection coefficient are the most important factors in the design of impedance matching network. However, stability of impedance matching should be taken into account in applications existing load impedance variation and component deviation due to tolerance and process variation. This paper investigates variability of T network impedance matching analytically. The formulas for calculating the resulting reflection coefficient caused by parameter variations are derived from quality factor-based design method. The analysis results can provide reference for design process and an opportunity for a better understanding of the dynamic behavior of the narrowband impedance-matching networks.

Abstract: In order to achieve fast and efficient data acquisition and digital-to-analog conversion, based on ARM9 Micro-controller S3C2410 and embedded real-time operating system μC/OS-II of multi-tasking A / D acquisition system. Not only able to finish with high precision, reliable, stable, real-time multi-channel analog signals and on-off signal data acquisition, and displays it on the LCD in real time. Completed in ADS1.2 compiled environment, system software using C language and assembly language mix programming, which makes full use of the advantages of different languages. This paper constructs the system's overall design, hardware circuit design method is given in detail, at the same time describes key transplant μC/OS-II embedded operating systems and software design.