基于实时多任务操作系统的蒸汽流量仪的设计  

A STEAM FLOW METER DESIGN BASED ON REAL TIME MULTI-TASK OPERATING SYSTEM

作　　者：毕东明[1] 陈章龙[1] 涂时亮[1] 

机构地区：[1]复旦大学计算机科学与工程系,上海200433

出　　处：《计算机应用与软件》2009年第7期251-253,259,共4页Computer Applications and Software

摘　　要：介绍了一种基于嵌入式实时多任务操作系统的高精度蒸汽流量仪的设计。仪表硬件平台选用Freescale M68HC908AZ60单片机,运行自主研发的FDCX08操作系统,支持现场总线通信。通过引入多任务调度和模块化的软件设计,解决了传统仪表单任务顺序执行和实时性差的缺点,增强了系统的可靠性和可移植性;蒸汽计算模型使用IAPW S-IF97公式,精度高。In this thesis it introduces a design of steam flow meter with high precision,which is based on embedded real-time multi-operating system. The meter selects Freescale MC68HC908AZ60 microcontroller, runs under the autonomous-developed FDCX08 RTOS, and supports field bus communication. By introducing multi-task scheduling and modularized design, it overcomes the shortcomings of single task sequence executing and poor real-time performance in traditional meters, improves the reliability and portability of the system. The steam calculation model adopts IAPWS-IF97 formula,which has a high precision.

关 键 词：实时操作系统 MCU 蒸汽流量 CAN总线 IAPWS-IF97 

分 类 号：TP311.11[自动化与计算机技术—计算机软件与理论] TP311.1[自动化与计算机技术—计算机科学与技术]