摘要
为适应一种船舶双广播系统多节点随机通信的需求,设计了RS485的通信网络,介绍了双系统的网络结构,RS485组网的通信硬件电路、保护电路和多节点主动通信的协议。通过总线监测、冲突避让算法,该协议实现了半双工模式下各节点的主动通信。测试结果表明该协议能提高通信效率和可靠性。
RS485 communication network is designed to adapt to needs of random multi node communication of a dual marine public addressor system. Network structure of the dual system, RS485 network communication hardware circuit, protection circuit and protocol of multi node active communication mode were introduced. By means of bus monitoring and conflict avoidance algorithm,this protocol realizes multi node active communication under the half duplex mode. The test results show that it can improve the efficiency and reliability of the communication.
出处
《江苏工程职业技术学院学报》
2015年第3期16-20,共5页
Journal of Jiangsu College of Engineering and Technology
关键词
广播机
RS485保护
冲突避让
主动通信
public addressor
RS485 protection
conflict avoidance algorithm
active communication
