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针对目前大规模应急照明监控系统485通信调度过程中存在的耗时长、效率低问题,对此提出基于优先级的通信调度策略。该策略通过设置不同优先级,引入排序算法来提高系统485的通信效率。排序算法可根据不同的波特率和数据位数对消息排序以减少系统通信配置次数进而缩短通信时间。基于提出的优先级调度策略使用Qt/Embedded和Sqlite数据库等工具开发了一套触摸屏应急照明监控系统。该系统能够正常运行并提高了应急照明监控系统通信速度。经过仿真验证,基于优先级排序算法调度策略提高通信速度是可行的。实际应用中,阜阳应急照明监控系统的正常运行也证实了此方法可行有效。
In view of the long time consuming and low efficiency problems in the current large-scale emergency lighting monitoring system 485 communication scheduling process, a priority-based communication scheduling strategy is proposed. This strategy introduces a sorting algorithm to improve the communication efficiency of the system 485 by setting different priorities. The sorting algorithm can sort messages according to different baud rates and data bits to reduce the number of system communication configurations and thus shorten the communication time. Based on the proposed priority scheduling strategy using Qt / Embedded and Sqlite database tools to develop a touch screen emergency lighting monitoring system. The system can operate normally and improve the communication speed of emergency lighting monitoring system. After simulation, it is feasible to improve communication speed based on scheduling algorithm of priority ranking algorithm. Practical application, the normal operation of Fuyang emergency lighting monitoring system also confirmed that this method is feasible and effective.