船舶电站仿真智能终端显示通讯模块的设计与研制
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摘要
目前,轮机员取代电机员来管理船舶电力系统已经是一个必然的趋势,如何使轮机员熟练地掌握船舶电站的操作过程是一个不容忽视的问题,是轮机员“补电”的重要内容之一。方法主要是在理论学习的基础上,进行实际操作训练。但对于进行非正常操作以及故障模式下的训练,在实际系统中是不允许的,而在与原型电力系统相似的模拟系统上进行仿真培训,是可行而非常必要的。
     基于这样的背景下,我们着手设计开发了一套船舶电站仿真管理系统,主要仿真对柴油机和发电机进行保护和控制。本电站仿真管理系统模拟了当前船舶电站管理系统中广泛采用的所谓网络型分散式控制模式。
     在本电站仿真管理系统里,上位PC机和下位机组成一个主从式系统。下位机是一个以单片微控器80C196KB为核心的控制部分,它可以接收上位机发来的仿真数据,由一个图形液晶显示器显示设备运转情况。为了模拟实际的系统,本仿真管理系统还能够通过下位机自带的键盘,进行系统参数的设置或修改。一旦模拟电机的运行超出安全范围,系统将发出报警信息,这些信息通过液晶屏或者指示灯的状态来显示。培训人员通过报警信息,应能够及时进行故障排除处理,使系统持续正常运转。
     上位机为普通的PC机,在其软件模块中采用了图形化用户界面技术,它可以模拟生成系统的运行参数,以图形化的方式显示系统的模拟运行状态。而且它可以通过RS-485总线和下位机进行数据交换,下发模拟的系统运行参数,同时可以记录下位机的操作,教练站可以了解受训者面对系统异常时所做的操作,以此达到仿真培训的目的。
     课题的研究工作主要包括电站仿真管理系统下位机模块的硬件设计、上下位机的软件设计和系统联调。系统研制开发过程主要分以下几个步骤:
     1.应用Protel99SE软件设计下位机的原理图和设计PCB图。
     2.对板卡进行硬件调试,线路排错,芯片测试。
     3.编写下位机的汇编语言程序,在WAVE2000L仿真器上调试。
     4.利用仿真器连接板卡,进行在线仿真和RS485通讯测试。
     5.将程序固化在EPROM中,进行EPROM仿真调试。
     6.编写上位机的管理软件和人机界面。
     本文主要介绍了电站仿真管理系统的工作原理、硬件组成和软件的设计思想,最后提出了系统存在的不足和硬件升级思路。
In the management of the marine power system ?there is a trend to replace the special operators with the normal operators. It's a big problem we can't neglect how to make the normal operators familier with the operations about marine's power system. The best solution may be based on the theories' studing and do exercises on the real system except those operations which would cause serious results. So it's nessary to do exersices on the simulation systems.
    A simulation system about the power system has been developed under this background, it simulates protecting and controling the diesels. In this simulation system, a distributed control mode based on network is applied, so the operators can do exercises on finding the faults when the emergency occurs.
    A master-slave structure is used in this simulation system. Every slave device is cored of by 80c 196kb single chip microcomputer. They can receive the simulated model data which are sent by the master and display the system's state and the system's log on a graphic liquid display module. In this simulation system, operators can modify the system's parameter by keyboard. Once the emulational parameters run out of range, warning messages will be generated and displayed on the liquid display. The operators must think how to check the system's health situation and make the system run continually when they see these warning messages.
    We use a normal PC as the master part in this system, the graphics UI technology has been used in its software modules. The master can generate data to simulate the real marine power system, and these data be sent to the slaves device by the RS-485 bus. The master also can record the operations of the operator, so we can monitor what things have been done by the operator when the emergency occurs.
    The entire tasks are divided into hardware designing and software programming of power management system. The main process of the development on power management system is as follows:
    
    
    
    1. Firstly, apply Protel99SE software to design the SCH chart of the slave computer, design PCB charts and send them to the factory.
    2. To debug on the hardware, eliminate circuitry errors, and test on every chip.
    3. To program with assemble language, and debug on the wave 2000L simulator.
    4. To utilize the wave 2000L simulator to link slave computer and test on the RS-485 communication
    5. To Embed the slave computer program debugged successfully into EPROM, and debug the system on EPROM;
    6. To make the program of master computer and visual-machine interface. The paper introduces work principal of the simulation system, its hardware
    structure and software design, points out the fault of monitoring system and makes the hardware updating thinking.
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