Research on the Realization of Remote Controlling for Multi-output Power Supply of Communication Equipment Based on Ethernet

According to the requirements of communication power supply, such as high reliability, wide application and high availability, the authors raise a new remote control design for a multi-output power supply for communication equipment based on TCPIP protocol and embedded technology. Then the hardware design is given for the system is discussed based on Ethernet professional chip PRTL8019AS and related circuits. The firmware software design for the salve-computer based TCPIP technology, and the soft design of communieation and control for the master-computer are proposed based on Winsoek and MFC technology in detail A test machine is built to do the testing, the test results prove that the test machine works stably and well, satisfies the design rules and also provides a feasible method for the remote supervise in communication power supplier whose requirement includes remote supervise, no-people on duty and so on.     

Application of IEEE1394 Communication Technique in Car-engine Real-time Imitating

A design scheme using IEEE1394 serial interface to achieve communication between PC computer and DSP controller is introduced, which is used in real-time imitating for car-engine integrated controlling system. First, the rule of high speed IEEE1394 serial communication using TSB41BA3/TSB12LV01B interface is discussed. Further, the design scheme of software and hardware of communication sub-system is probed. The application effect is good in the car-engine integrated controlling system developed.     

Application of DMA in Realtime Image Processing

Direct memory access(DMA)is an important technology used for fast speed data transfer in data signal processor(DSP). DMA is able to move data block independent of CPU, and this capability meets real time image processing. TMS320C6201 DSP is taken as an example, and DMA controller characteristic is introduced. According to DMA application in realtime image processing, the specific control ways and realization steps are given out. The research result shows that the flexible control DMA can not only raise image data transfer efficiency but also improve DSP speed.     

File Intertransmission Based on WinSock Component

WinSock is a group of API,which is used to transmit data and exchange information on Internet,the Socket Application programme impoldered by users may communicate with other Socket Application programes by Internet. Delphi provides Socket components,which sustains the TCP/IP protocol and makes the Internet programming acquiring much more flexibility.This paper probes that how to realize transmission of files in any format under nonblocking mode between clients and servers by means of Socket components of Delphi.     

Rapid Prototype Control of Hydraulic Automatic Transmission System Based on dSPACE

dSPACE is a prototype development and real-time control testing platform which is based on MATLAB/Simulink software. By establishing mathematic model of hydraulic automatic transmission system, the shift rules are achieved. A testing platform for hydraulic automatic transmission system is developed whose control software is programmed by simulink and using the dSPACE as the centre controller. The experiment of electric throttle control and power performance matching control of hydraulic automatic transmission system is carried out. the result shows that well matching performance of hydraulic automatic transmission system can be realizedby using the control strategy proposed in this paper, it provides a fast and efficient approach for researching and developing the hydraulic automatic transmission system.     

Applying of the DSP Technology in the Virtual Instrument System

The hardware architecture and instruction set of the digital signal processor leads to its high speed and precision in processing data. Aiming at the virtual instrument's deficiency in speed and precision resulting from the limit of the computers' development, the author brings forward a method to promote the performance of the virtual instruments using the DSP technology. Implementing the complex algorithms in DSP and using the principal and subordinate DSP structure or DMA technology in the data acquisition card of the virtual instrument can promote the virtual instrument's real-time characteristic greatly. Several key technologies are introduced in realizing the data acquisition and processing card. The experiment shows that the digital signal processors have higher speed and precision than the computers when implementing complex algorithms, and that using the DSP to implement the algorithms is an effective method to promote the virtual instrument's performance.     

Study of IP over WDM System Structure

WDM technology is the basis of optical network implementation. Due to eliminating SONET/SDH and ATM elements, and allowing direct connection with IP routers, IP over WDM can reduce network cost and simplify network expansion . In this thesis, the structure and protocol layers of IP over WDM are firstly explained. Then the procedures of this network are described briefly. At last, the problems and future of IP over WDM are analyzed     

Application of DSP/BIOS to Video-tracking Process

This thesis mainly introduces a certain kind of real kernel based on TMS320 DSP- DSP/BIOS. There is an expatiation of the DSP/BIOS startup sequence and the design of a video - tracking system based on the characteristic of DSP/BIOS structure. The system is designed and analyzed by the UML technique. By means of scheduling and communicating between one task and another, managing and sending message and managing the muhithread by time-slicer in the process of video-tracking, the video-tracking system can be achieved reasonably. It is proved that the system work stably , the design and the resource are assigned aright and reasonably when the system satisfy the condition of real-time in practice.     

Research of Real-time Computer Network Protocol Based on UDP Protocol and Virtual Token

Aiming at the urge demand of a large amount of real-time data transmit in industry and academy fields, the authors analyze the advantages and disadvantages of many kinds of present protocols, take advantage of UDP protocol and standard 802.4 of Token Bus. The real-time network protocol is presented based on UDP protocol and virtual token. And this paper illuminates the principle of real-time quality and reliability about the protocol, giving the frame format of the protocol and the format of Virtual Token. It demonstrates the capability of the protocol with a point-to-point transmit example that constructed according to this protocol.     

An improved session initiation protocol signaling compression algorithm based on lempel ziv storer szymanski and Huffman

Session initiation protocol(SIP) has been chosen as the call/session control protocol in IP multimedia subsystem(IMS). However, large SIP messages create a bottleneck for SIP application in IP multimedia subsystem(IMS) in wireless applications. Based on the SigComp, and by comparing various compression algorithms, lempel ziv storer szymanski(LZSS) is selected as the basic algorithm to compress SIP in accordance with the characteristics of messages in SIP protocol. To further improve the compression ratio, a new algorithm is proposed based on LZSS and Huffman. The performance of the compression algorithm is analyzed via simulation.     

Methods of Software Optimization in Real-time Tracking System Based on DSP

The DSP(digital signal processor) of TMS320C6000 series,has a special structure VLIW(very long instruc-tion word),which makes the functions of hardware depend on the efficiency of software.Therefore,when DSPs of thisseries are used to design a real-time tracking system,the executing efficiency of software will directly affect the real-timespeciality of the system.Several methods of optimizing software based on C6000 DSPs are researched,including choo-sing compiler options,use of DS Pkey words and intrinsics,data packed and software pipelining.Optimizing software ofthe whole system by using these methods,primely can solve the problem of bad real-time in processing.Consequently,the stability of the whole system is improved.     

Study and Implementation of Traffic Generator in IP Network

According to the simulation results, the factors causing the forming of self-similarity in IP network is presented. Through analysis based on ON/OFF model, we show the influence of traffic source integration level on self-similarity degree. Using the above results, an IP network traffic generator is implemented. Tests in real environment show that the generator can better reflect the relationship of file sizes, protocol types, ON/OFF residence time, traffic source integration levels and self-similarity degrees.     

A Correspondent Node Binding of Method Based on Early Binding Updates Option

The mobile IPv6 protocol solves the mobile communication problems in the next generation Internet.The mobile IPv6 not only provides huge address space,but also strengthens handover ability of mobile user,and realizes route optimization.IPv6 will become the next generation Internet protocol;so the mobile IPv6 will be widely used in the next generation Internet.The moblile IPv6 will provide in the future network,a uniform transmission platform that transmits data,voice data and video data,or other services.People not only put forward more and more requirements for multimedia playing operation,but also bring forward higher request,which is interaction capabiliby communication,Because the long latency associated with mobile IPv6's return routability procedure of correspondent node binding,this paper presents a fast correspondent node binding of method based on early binding updates option.The method not only eliminates at least 50% of the additional delay that a standard correspondent node binding adds to the network stack's latency,but also reinforces the ability to support alternant real-time application.     

基于ZigBee的冷链温度监测系统的研究

为满足贮运食品对冷链温度实时监测的需要,研究设计了一种基于ZigBee的冷链温度监测系统。该系统利用SZ05模块构建ZigBee网络,实现冷链温度的实时采集与传输,协调器节点采用ATmega128作为控制器,路由节点采用ATmega16作为控制器,分别设计出两种节点的硬、软件。经12 h组网通信测试,结果表明,该系统的硬件结构简单、体积小、设备可靠性高,组成的无线传感网络能够实现对温度准确、稳定、可靠的实时监测,对监控冷链温度、保证冷链中易腐食品品质和食用的安全性可起到重要作用。     

Study of SOCKS Firewall Based on IPv4/IPv6

An extended function of SOCKS firewall that enables smooth heterogeneous communications between the IPv4 nodes and IPv6 nodes based on the SOCKSv5 protocol is introduced, the architecture of translating IPv4 and IPv6 by applying the SOCKSv5 protocol is presented, there are two models of translating IPv4/IPv6 techniques and its mechanism, principle are more illustrated in details, an example for a SOCKS client securely transparent accessing to remote destination computer with different IP addresses is discussed. As well as the techniques of Direct Address Translation and DNS Name Resolving Delegation are developed , which it keeps the old SOCKSv5 firewalls' advantages, and shows another new characteristics. Therefore, the new firewalls technology are presented much wider application fields.     

Study on Application of Protocol Analysis in Attack of ICMP

In this paper, the encapsulation of ICMP packets and the specifications of IP packet, ICMP packet and UDP packet are introduced. At the angle of the protocol analysis, a ICMP attack case is described the characters of attack are abtained and the corresponding countermeasures are presented.     

Design of a Motion Control System of Confocal Scanning Laser Microscope

A confocal scanning laser microscope is presented. Its motion control system is built with the DSP - based motion controller. The system worked on a double CPU structure that includes industrial control computer and motion controller, the system adopt friendly man - machine interface In the design of software. The systems tasks are divided into real - time tasks and no - real - time tasks. The lower computer deals with the real - time tasks such as position control and velocity control and the upper computer is used to deal with the non - real - time tasks. The system structure of con-focal scanning laser microscope and the constitute of motion control system as well as the software is introduced .     

牧草观测自动化技术研究与系统设计

针对内蒙古自治区生态观测需求,特别是草地生态系统观测需求,选取牧草观测为研究内容,提出基于嵌入式技术和并行计算技术的实时远程可控可视的牧草观测自动化技术思路。采用特征像素图像识别方法,实现牧草覆盖度的自动测量、牧草的发育期图像自动识别。利用摄影测量技术结合图像处理技术获得像高转物高变换算法,实现层高与株高的自动测量。结合现代电子技术以及DSP技术、图像处理技术设计了牧草自动观测智能传感器,传感器在观测前端完成图像采集、处理与模式识别后,再将处理后的结果通过网络传向服务器端,可通过智能手机或PC访问服务器远程查看观测数据,实现牧草覆盖度、层（株）高以及牧草生长期的自动观测。测试结果表明,图像处理与实测覆盖度数值显著相关检验R_0.05>0.90,与实测株高数值显著相关检验R_0.05>0.85。相对于在后端PC系统进行图像处理,不但可以提高观测系统的数据运算处理速度,而且鲁棒性好,同时能够大大减轻数据传输压力,适合对体积、功耗、工作环境及稳定性要求极高的场合。     

Design of the distributed wireless monitoring system

For the limitations of the traditional monitoring systems under the circumstances of dispersed monitoring points, wide distribution range and the harsh environment, a distributed wireless monitoring system based on radio frequency technique is designed. The system adopts the ultra low power consumption MCU MSP430 as the main control chip and extends several processing module in the periphery. In addition, the multi channel transceiver nRF905 is used for wireless data transmission. The software and hardware design scheme of the proposed system and the communication protocol for distributed data transmission are discussed. Frequency hopping mechanisms are employed to increase the reliability of data transmission. The results show that the proposed system has the characteristics such as flexible use and excellent mobility, while can monitor multipoint data in special environment in real time.     

Real-time Infrared Image Acquisitionand Processing System Based on PCI Bus

In the system of infrared imaging acquisition, it is necessary to improve data transfer to satisfy the characteristics of high speed and real time. So,this paper introduces PCI bus and PCI inerface to imaging acquisition. The protocol of data transfer of PCI local bus and the structure of PCI9050 are studied in detail, and the IRFPA data acquisition system are described based on the protocol of data transfer of PCI local bus. The system adopts frame buffer to make slow transmission between peripheral circuit and PCI bus.CPLD is also used as a master of logic time control?