实时操作系统QNX在电能质量网络监测系统中应用

简述了电能质量监测的意义及发展概况,分析了实时操作系统QNX的特点,详细介绍了实时操作系统QNX在一种电能质量网络监测系统的应用方案。该方案将数据采集和数据处理功能进行了分离,硬件部分主要实现数据采集功能,功能专一,实时性好;而数据处理主要用软件实现,易于功能扩展和数据统计。给出了基于QNX实时操作系统的网络监测系统的组成结构,其数据采集电路中,AD芯片采用ADS7864,单片机采用网络单片机DS80C400,网络接口芯片采用RTL8201,另外,还利用一块现场可编程门阵列(FPGA)芯片XC2S200对AD采样进行控制。分析了数据采集处理系统中网络连接的建立以及人机交互界面软件开发过程中的关键技术,最后给出了试验结果。

Application of real-time operating system QNX in power quality monitoring system

The significance and the latest development of power quality monitoring system are in-troduced.Characteristics of real-time operating systems QNX are analyzed and its application in the network power quality monitoring system is illustrated.It separates data acquisition and data processing functions,while the former is implemented with hardware,which has special function and good real-time performance,and the later is implemented with software,which is superior in function expansion and data statistic.The system structure,network link and human-machine interface development are explained in detail.In the data acquisition circuit,the analog-to-digital conversion uses the ADS7864 chip,the singlechip uses the network singlechip DS80C400,and the network interface chip uses the RTL8201.In addition,a FPGA(Field Programmable Gate Array) chip XC2S200 is applied for sampling control.Test results are offered.