油罐车在途状态监测系统及其任务调度策略

为了实时监测油罐车在行驶途中的温湿度、车体姿势、支撑座压力、进出油口是否漏油等安全信息,以超低功耗的ATmega1281微控制器和AT86RF230射频模块为核心,设计了感知油罐车安全信息的无线传感器网络节点,构建了多参数在途监测系统。针对无线传感器网络操作系统TinyOS的FCFS调度策略对实时性强的任务响应慢及吞吐量低等缺点,提出了一种基于多队列任务调度策略。研究结果表明:采用实时任务和优先级任务分级调度,可以设置动态优先级和任务超时中断,满足了系统对高实时性和高优先级任务的响应,并保证低优先级的任务也能在适当时间内执行;仿真及实际测试表明,设计的油罐车在途状态监测系统在平均能耗增加不大于3%的情况下保证了监测系统的实时性。

Design of tanker sensor node based on WSN and improvement of TinyOS tasks scheduling

For real-time monitoring of temperature,humidity,car body posture,carriage pressure,inlet and outlet mouths oil leaks and other security information while driving oil tank truck,the wireless network node of monitoring tanker security information was designed with ultra-low power of ATmega1281 microcontrollers and AT86RF230 RF modules.To resolve the problem of TinyOS FCFS scheduling strategy which not able to give strong real-time tasks timely response and low message treatment,a multi-task queue scheduling ...