The main function characteristics of the new control system and some special function modules were also introduced , including master control module , communication protocol conversion module , data analysis and information display module , function expansion module , and user work platform terminal module 介绍了系统中所使用的交通流预测模型及其核心实现模块,包括主控制模块、通信协议转换模块、数据分析及显示模块、功能扩展模块和系统中心软件模块。
The dissertation started from the construction of an industrial ethernet that has two different layer . the characteristics of 485 bus and ethernet were particularly introduced in the dissertation , the content of communication protocol was introduced too . the dissertation emphasized analyzing the realization of the protocol , the protocol conversion from 485 bus to ethernet and the protocol conversion from ethernet to 485 bus 本文从构建一个分层化的工业以太网体系出发,详细介绍了构成分层网络的485总线和以太网的特点、通信协议内容,并重点分析了协议的实现、 485总线到以太网的协议转换和以太网到485总线的协议转换。
Experiment indicates that the converter realizes the data transfers function between the rs232 serial communicating port and the ethernet rj - 45 connector . it means that the converter realizes the protocol conversion . the software of the protocol converter is developed by the client / server mode 实验表明本论文设计实现的协议转换器系统板实现了rs232串行通讯口与以太网rj - 45接口的数据双向传输功能,也就是说可以完成rs232串行通讯口协议与tcp ip协议的协议转换功能。
In the design of hardware , frequency sweep signal is based on dds + pll . by the control the singlechip c8051f060 , ad9852 , the dds chip , can achieve stepped frequency signal . with amplifying and detector circuits , the instrument can achieve the measurement and receiving of amplitude frequency characteristic result . by means of pdiusbd12 finish the usb1 . 1 protocol conversion , communicate with usb interface of pc , the instrument give the measurement resul of amplitude - frequency characteristic in lcd of pc 硬件方面,扫频信号源基于dds + pll的技术,由c8051f060单片机控制dds芯片ad9852实现频率步进。再加上外围放大、检波等电路,测量和接收幅频特性。并借助于pdiusbd12完成测量数据usb1 . 1协议转换,实现与pc机的usb接口通信,将幅频特性测量结果在pc机的液晶显示屏上表达出来。
Now the problem is how to connect can control net with ethernet . this article analysis the characteristic of ethernet 、 can2 . 0 protocol 、 tcp / ip protocol in detail and their implement method , introduced a plan that solves interconnect between the two different network : design a “ can - ethernet ” embedded gateway , then we investigate the key technique about how to interconnect this two different network . including the network architecture 、 the ideal of protocol conversion and network model of “ can - ethernet ” plan 本文从can总线构成的现场测控网络与以太网构成的信息网络的发展现状出发,详细分析了以太网、 can2 . 0b协议、 tcp / ip协议的特点及实现原理,提出了解决can总线和以太网互联的方案:设计并实现嵌入式can总线-以太网网关。
It is a communication network of different - constitution style . therefore , a set of corresponding telecommunication network management system should be built so that it can transmit all kinds of important business for the power system under the state of stability 、 reliability 、 high - quality and high - speed . my literature regards tmn as the basic system , discusses the scheme of the integration power system communication network management system , brings up the layer network management architecture based on web . this thesis develops the protocol conversion software of the different network elements in power system communication network . the software make a sound foundation for the further research of the network management . at last , the development experience of telecomm management system is used for reference , prospects the development of telecommunication network management system 要保证这个庞大的通信网络稳定、可靠、优质、高速传输电力系统中各种重要通信业务,必须建立一套与之相适应的网管系统,最终实现运行、维护、经营、管理的科学化和现代化。本文以电信管理网( tmn )作为基础体系,探讨了电力通信综合网管系统的设计方案,提出了与电力通信网相适应的基于web的层次化网管系统体系结构。同时开发了电力通信网中各网元的标准协议转换接口模块,利用它实现对电力通信网不同监控设备的有效管理,为网络管理的进一步研究打下基础。
The thesis includes the design of hard circuit , pcb ( printed circuit board ) , driver and application soft involving a / d board and d / a board . the detailed functional modules consist of multiplex signals select module 、 analog digital conversion module 、 digital analog conversion module 、 pci protocol conversion module 、 driver and magnifying module 、 control logic 、 clock circuit and configuration circuit . the importance of the thesis is a / d board 本课题包括硬件电路、印刷电路板( pcb ) 、驱动程序和应用软件的设计,涉及a / d板和d / a板两大块部分,具体的功能模块包括多路信号选择模块、模数转换模块、数模转换模块、 pci协议转换模块、驱动放大模块、控制逻辑、时钟电路和配置电路,其中重点是a / d板部分。