基于CAN总线的智能照明系统的设计和实现.doc

摘　　要 智能照明控制系统是自动化技术在照明控制领域的应用和推广，它不仅是实现照明艺术性和舒适性的有效手段，而且迎合绿色照明的发展方向，是节约能源、缓解未来能源危机的有效措施，其发展前景非常广阔。现场总线是连接现场设备和自动化系统的通信网络，具有全数字信号传输、控制功能分散、开放等特点。CANCAN总线的智能照明控制系统。该系统是一种分布式的控制系统，既能分散控制又能集中管理，在中央控制室，管理人员可以通过合理的设置创造舒适的环境，同时又达到节约能源的效果。智能控制器通过照度传感器测得周围环境的照度，与设定值比较从而调节光源的输出使光照度达到最合适的水平；控制器通过红外传感器探测是否有人，自动将无人区域的灯关闭。 本课题主要完成了以AT89C52为核心的CAN节点的硬件设计，包括数据采集模块的电路设计，执行器模块的电路设计以及网络通信部分电路设计。在软件设计中利用模块化编程思想首先讨论了控制器实现控制功能的程序设计及控制器与物理总线通信功能的程序设计,并给出设计流程图，最后对通信的实现部分包括对信息的发送和接收做了详细的说明。 实验测试结果表明，本文提出的基于CAN总线的智能照明控制系统的方案是可行的，且系统的各个部分电路运行稳定可靠，满足设计功能和要求。  Abstract The intelligent illumination control system is the application and popularity of automation technology. It is not only the effective realization methods of aesthetical and comfortable light but also accordance with the “Green Illumination”and its direction of development that is an approval of saving energy and alleviating energy crisis, so that it has a promising brilliant prospect. Field-bus, a communication network for connecting equipments in field and automation system, has lots of prominent features such as totally digital transmission, distributed control function, opening system CAN-bus, which is one of Field-buses, has advantages in high real ability and low cost so as to it has been used largely in many fields. This paper introduced an intelligent lighting system based on CAN bus. The intelligent lighting system is a distributed control system, which can realize decentralized control and centralized management. In the main control room, administrative staff can create a comfortable environment via proper configuration, meanwhile, energy saving can be achieved, too. The intelligent controller detects environment illumination level through optic electric transducer. Then it compares the value with set point. Finally, it adjusts output of light to expected level. Via infrared sensor, the controller will turn off light of void area automatically. This paper mainly introduced hardware design of CAN node based on AT89C52, i