基于多线程的智能仪器Petri网  

The Petri Nets of the Intelligent Instruments with Multi-threads

作　　者：詹惠琴[1] 袁亮[1] 古天祥[1] 

机构地区：[1]电子科技大学自动化学院,成都610054

出　　处：《仪器仪表学报》2005年第9期909-912,933,共5页Chinese Journal of Scientific Instrument

摘　　要：在基于单片机的智能仪器的软件设计中采用了多线程技术,使多个任务并行执行。建立的多线程的智能仪器扩展时间Petri网模型,直观、形象、准确地表示了智能仪器的运行过程,和进程、线程互相之间的并行、顺序、优先级等关系,同时也表示出了硬件和软件之间的并发、限制、驱动等关系。根据Petri网模型还推导出各子任务完成时间的计算公式。In the software design of intelligent instruments based on single-chip micro-processor, multi-threads are introduced and some measures are proposed, so parallel multitasks can run. A model of extended timed Petri nets for it is established. The model is indicated exactly and clearly to the whole running course of intelligent instruments, it is illustrated to parallel, sequence and priority among these processes and threads, and intercurrent, restriction and driving between hardware and software. The arithmetic of finished time for subtasks is educed based on the model.

关 键 词：智能仪器 任务调度 多线程 时间PETRI网 

分 类 号：TM93[电气工程—电力电子与电力传动]