In hardware system design , we adopted the microcontroller of at89c51 as the main controller of inferior processor , it is used to connect the modem with the data acquisition module . mcs - 51 assemble language is used to program the software of the device to realize the data transmission between modem and inferior processor . when the electric power in the run is beyond the specified value , the inferior processor can dial the phone number of central computer automatically to send the alarm message through the communication line . using a single - chip microcomputer to control a modem to transmit remote datas are introduced in detail 随后详细地介绍了系统的总体设计思想和具体的实现过程。在硬件系统设计中,采用了at89c51单片机作为下位机主控制器,用于连接modem和数据采集模块。通过使用mcs51汇编语言编写程序,实现了下位机与modem之间的数据传输,同时实现了自动检测负荷,进行拨号报警的功能,其中重点介绍了单片机控制modem进行远程数据传输的方法。
Then , we analyze the actual status of network , according to the environment of the room where those computer equipments were placed , the reliability of network structure , the reliability of network applications , and the monitoring and management of network system and the actual status of network security , according to the safety of the remote transmission , the access control of servers group , the interface of internet , the defense of network viruses , the audit of network security , and the management of network security 然后,对重庆气矿的计算机网络、以及网络安全的现状进行调查研究。其次,针对重庆气矿的网络现状,从网络的机房物理环境、网络结构的可靠性、网络应用系统的可靠性、以及网络系统的监控管理、网络远程数据传输的安全、服务器集群访问的安全、 internet的安全接入、计算机网络病毒的防护、网络安全的审计、以及网络安全管理方面进行了详细的需求分析。
According to the actual conditions and functions of purchase , sale and store business of each branch company of petroleum china , this text discusses the design and realization of a management system based on distributed mode , minimum for goal with the cost , the feasibility of several kinds of schemes , especially the designing mentality of the management system under the dispersed business demand , and gives the method to realize remote data transmission 摘要根据中国石油公司各销售分公司购销存业务的实际情况与功能要求,论述了基于分布式模式的购、销、存管理系统的设计与实现过程;以成本最低为目标,讨论了几种方案的可行性,重点讨论了分散业务需求下管理系统的设计思路,以及实现远程数据传输的方法。
The paper gives the process of how to design the whole application system , describes how the client terminal and the server terminal works in detail , gives the final result of the application program , analysises the problem happened in the system and gives the way to resolve them . the design includes two parts : ( l ) hardware : the hardware system is mainly structured by distributed single chip micyoco data processing system based on rs - 485 bus ; ( 2 ) software : this part designs the scm program by c language , we use visual basic to design the client and the server application program , the whole software includes com port communication program and remote data transmission , we also use sql server 2000 to build the remote database system 本系统设计完成的主要工作有: ( 1 )系统硬件设计:主要是由基于rs - 485总线和单片机组成的分布式多路数据采集系统; ( 2 )系统软件设计:使用单片机c语言设计了单片机工作程序,使用visualbasic语言完成了系统中客户端、服务器端应用程序设计,其中包括数据采集部分中的串行口通信程序设计和client server模式下的远程数据传输程序设计,使用sqlserver2000完成了远程数据库的构建工作。
This paper researches a practical engineering project - a technical reform on an dispatching & supervising system of tangshan limited corporation , which involves the technology of computer control . communication and net . the system realizes the real - time supervision in the center of dispatching , the data collection of the signal equipments of the railway station , and the data transmission from live to the center of dispatching , at the same time , supplies the interface for distance user to visit the lan of the center of dispatching and for the lan to connect the internet 本硕士论文选题源于一个实际的工程项目?唐山钢铁股份有限责任公司调度监督系统的技术改造,该项目综合了计算机控制技术,通信技术和现代网络技术。本系统在调度所实现了对现场车站信号设备的实时监视,在现场车站实现了对信号设备状态的数据采集,并实现了从现场到调度所的远程数据传输,同时为远程用户访问调度所的局域网和局域网连接到internet提供了接口。
远程: long-range; long-distance; r ...数据传输: data transmission远程数据传输接口模块: rdtim remote data transmission interface module远程数据传送器: long distance data transfer远距离[远程数据]传输: remote data transmission远程数据: lrd long range data; remote data terminal; teledata远程数据机: teledata远程数据库: rdb remote database; remote data base; remote database远程数据源: remote data source远程数据站: remote data station远程数据处理: remote computing; remote data processing; remote-data processing; tdtele data processing远程数据对象: rdo remote data objects; remote data objects远程数据访问: rda remote data access远程数据服务: rds remote data service; remote data service远程数据集中: remote data concentration远程数据控制: rdc remote data control远程数据链路: remote data link远程数据收集: rdc remote data collection; remote data capture; remote data collection远程数据输入: remote data entry远程数据终端: remote data terminal光数据传输: optical data transmission流数据传输: stream data transmission数据传输: data transmission◇数据传输发送机 data transmitter; 数据传输率 data transmission rate; data-signalling rate; 数据传输系统 data transmission system; 数据传输装置 data transmission device数据传输机: data set; data-set数据传输率: data rate; data tra mi ion rate; data-signal rate; data-signaling rate; data-signalling rate; dtr data transmission rate; transfer rate