【作者】 王志欣；

【导师】 孙以材；

【作者基本信息】 河北工业大学 ， 微电子学与固体电子学， 2002， 硕士

【摘要】 随着工业控制自动化程度的提高，对控制现场检测仪表的智能化程度的要求也越来越高。同时，随着工业生产规模的不断扩大，对生产过程的集中监控的要求也日趋迫切。为了顺应这种要求，我们设计完成了一款网络化智能压力仪表。它继承了传统智能仪表的优点，同时增加了网络化功能。多台仪表可以组成一个检测网络，并通过RS-485总线把监测数据上传给主机，主机也可以对每一台仪表发送控制指令，由此方便的实现了工业生产中的多点集中监控。为了适应某些特殊工业生产环境，该仪表还设有红外遥控组件，可以用通用的遥控器对仪表下达各种操作指令，保障了操作人员的安全。 本文详尽的论述了该仪表的整体方案、器件选型等，同时也介绍了红外遥控信号的组成、发射原理和软件解码过程，对红外遥控信号接收过程中的抗干扰问题也做了一定的探讨。在主机端详细介绍了如何在WINDOWS下用Delphi实现多线程串行通信的原理和方法。同时对单台PC与多台仪表组成的主从式网络通信中误码的产生原因以及波特率的设置技巧做了详尽解释。更多还原

【Abstract】 With improving of automatization of industrial control, the requirement to intelligent detection becomes urgent. At the same time, with the expanding of manufacturing scale, the requirement to the supervisory control of working process becomes urgent. To conform these requirements, we design a type of intelligent instrument with network communication. It not only has the advantages of traditional intelligent instrument, but also has the function of network communication. Many instruments can compose a detecting-net, each instrument can upload the monitoring data to host computer. The host computer also can send control instruction to each instrument. So we can realize the integral supervisory control to multi-position. Adapting to villainous situation of industry, this instrument equips with infrared remote controller. The instrument can receive all of the operating instruction by infrared remote controller. So it insures the safety of the operator.This paper disserts the whole scheme and device selection of the instrument in detail. At the same time, it introduces the constitution, principle of transmission of infrared remote control signal. It also explains how to decode the remote control signal by software, and discuss the anti-jamming problem of receiving. It illustrates the principle and method of multithread serial communication and exemplifies how to realize them by Delphi. This paper explains the reason of code-error in network communication, and defines the method of baud rate setting.更多还原