Applied Mechanics and Materials Vols. 602-605

Abstract: With the popularity and mature of CDMA technology, in addition to inherit the CDMA covering a wide range, small influence by the environment, security, real-time characteristics, SMS has the advantages of low cost、convenience which make the utilization rate more and more high. SMS has great potential application in the field of industrial automation. Experimental study on the S3C2410A embedded control system to send and receive message in English or Chinese by Siemens company TC35i module in CDMA, using the embedded technology and CDMA low cost and mobility , unattended advantage , show broad prospects in the field of environment of mobile operation and distributed remote data acquisition, monitoring system.

Abstract: With the emergence and development of 3D video technology, audiences have higher expectations to the sound effect while watching the 3D video. So we studied the dynamic sound effect under the existing audio standard of the multichannel. In this paper, the audio file of the sea wave was disposed by the Gaussian function through MATLAB and divided into several parts to be saved as different audio files. Then each audio file was sent to a channel to simulate a stereo sound field. Test result showed that the effect will provide a perfect experience for the audiences.

Abstract: A nonlinear model for the marine high-voltage transformer is established which based on the J-A theory , considered the eddy current loss. This model accurately reflects the nonlinear characteristics of the transformer, and does well in describing the dynamic process, it is propitious to design the ship transformer and the study of relay protection. A fourth-order Runge-Kutta algorithm is used to solve the nonlinear differential equations to ensure the model has a high accuracy, and the pre-magnetizing model is also established. At last, through the transformer no-load closing simulation results verified the correctness of the model.

Abstract: A system of feed-water treatment monitoring and controlling based on the integration of PLC and computer is described in this paper. Its composition, functions, and communication are illustrated emphatically. This kind of water treatment system shows many good performances, such as high precision, reliability, easiness in operation and so on. Its study and application is essential for thermal power plant safe and economic operation.

Abstract: We focused on the stabilization of switched linear systems with time-delay and input saturation. First, the saturation part of each subsystem was dealt with by a new method and the system was transformed into a general switched system. Secondly, we proposed a sufficient condition for system stability based on Multi - Lyapunov Function. The sufficient condition is expressed into LMI and can be solved with MatLab. Further, we designed the system controller.

Abstract: According to the problem that the traditional clock recovery method based on FPGA can not recover the clock of higher frequency NRZ (Non-return to zero) serial data. This paper proposed a clock recovery design that adjusts the output clock earlier or later constantly according to the phase relationship between the input data and the feedback clock. The proposed design can be implemented on the FPGA without the higher operating frequency requirement meets the demand of middle and low version FPGA clients. The circuits implemented on FPGA has been downloaded to the Xilinx Virtex5 XC5VSX50T FPGA after behavioral simulation and post-route simulation, the debugging results verified that the proposed design is effective and realizable for clock recovery of higher frequency NRZ data and realizable for FPGA.

Abstract: This paper provides a complete solution for bus security protection of cipher SoC chip from the technology of bus security protection. The structure has a scrambling transformation on the data bus of whole cipher chip with the word oriented stream cipher algorithm, and has a scrambling transformation on the address bus of memory cells especially the EFlash with more efficient Benes permutation network. Relative to the cipher SoC chip, the scrambling transformation is transparent and can ensure the security of information transferred on the bus, improve the efficiency of bus scrambling, reduce the area overhead at the same time.

Abstract: In this paper, an analog digitalized AD method of small size was proposed, which based on low-power ARM, high-resolution, high accuracy, no delay in data output. Based on SOC technology, high-side detection technology and the processing theory of error data measurement, the AD technology replaced the way to conventional monitoring current signal by mutual inductor.

Abstract: Given the disadvantages of large volume and high power consumption of the traditional positioning device, the method of MPU with GPS chip combination to build a micro positioning device is put forward. We design the hardware circuit and program the corresponding application in this paper. The device selects the way of ultra low power working, which can improve working efficiency. The experiment results show that the accuracy in static and dynamic environment is better and it could meet the needs of the project in terms of performance.

Abstract: Electro-thermal acupuncture treatment instrument heats the needle by heat transfer effect, instead of the traditional Chinese thermal needle for acupuncture. It achieves better healing effect on acupuncture points of the human body through the intelligent control of MCU and temperature control device on the needle temperature, vibration frequency, and thermal efficiency and so on. This paper introduces software design of the electro-thermal acupuncture treatment instrument, which is mainly composed of the main program module, temperature acquisition module, timer module, display module, keyboard module and calculation control module. Temperature and vibration frequency of needle body, thermal efficiency, and time of acupuncture are intelligently regulated by MCU, so that treatment effect using electro-thermal acupuncture is better than using traditional Chinese thermal needle.