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field layer
相关语句
  现场层
    Fieldbus is the dominant technology in the field layer of the current industrial control networks.
    现场总线技术在当前工业控制网络的现场层占据着主导地位。
短句来源
    Industrial Ethernet and Some Pondering when Ethernet to Extend to Field Layer
    工业以太网及以太网向现场层延伸的若干问题的思考
短句来源
    This monitoring system has two layers: supervisal layer and field layer.
    这里将本监控系统分为两层:监控层、现场层
短句来源
    The system has three layers: management layer, monitored control layer and field layer.
    将此监控系统分为三层:现场层、监控层、管理层。
短句来源
    The field layer which includes valves and meters is to accomplish field control and data collection.
    现场层完成工业现场的控制和数据采集功能,通过现场控制阀门和仪表来实现。
短句来源
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  “field layer”译为未确定词的双语例句
    PERFORMANCE ANALYSIS OF FIELD LAYER COMMUNICATING NETWORKBASED ON POLLING PROTOCOL IN SUBSTATION AUTOMATION SYSTEM
    基于polling方式的变电站现场级通信网络性能
短句来源
    In the third chapter, according the systemic general plan, the hardware circuit and the software program of node of field layer is designed.
    第三章设计了现场监控层节点的硬件电路和相关软件程序。
短句来源
    On the ground of analysis of several kinds of field bus, CAN bus, which has high demand of reliability, good real-time performance and anti-interference, is adopted as the field layer network.
    采用winsock实现了网关与上位机之间的通讯; 在对各种现场总线进行分析的基础上,采用具有高可靠性、实时性好、抗干扰能力强等优点的CAN总线设计了下位机通讯网络。
短句来源
    Produces a whole design scheme of distributed remote measure-control system about NC machine tool,discusses importantly the middleware technology of combination of CORBA and Web Service,and this system is divided into three layers—field layer,middle layer and user layer.
    提出一种数控机床的分布式远程监测设计方案,在总体设计时把系统分成底、中、顶三层,重点讨论CORBA和W eb Service相结合的中间件技术。
短句来源
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  field layer
At strong magnetic fields, ρ becomes an oscillating function of magnetic field (layer thickness).
      
Addition of nitrogen (N) to the field layer of boreal forests has been shown to increase the occurrence of the parasitic fungus Valdensia heterodoxa on Vaccinium myrtillus plants.
      
Interactions betweenSphagnum mosses and field layer vascular plants in the development of peat-forming systems
      
Long-term changes in the field layer of oak and oak-hornbeam forests under the impact of deer and mouflon
      
Comparing experimental results with field data, we conclude that H- and Al-toxicity and unfavourable N-nutrition (as solely NH4) to a similar extent may explain the acidifuge behaviour of field layer plants.
      
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This article firstly presents the basic analysis of the data generated from field measuring and controlling units(FMCU), using the simple method of probability theory and considering the particularity. of middle or small integratedsubstation automation systems. Then detailed discussions on each segment of the program running in the FMCU are given.The limitation on CPU resources of FMCUs is studied, which is closely related with polling cycle. After each part of thepolling cycle is determined, the expressions...

This article firstly presents the basic analysis of the data generated from field measuring and controlling units(FMCU), using the simple method of probability theory and considering the particularity. of middle or small integratedsubstation automation systems. Then detailed discussions on each segment of the program running in the FMCU are given.The limitation on CPU resources of FMCUs is studied, which is closely related with polling cycle. After each part of thepolling cycle is determined, the expressions about the steady performances of field layer communicating network such aschannel efficiency or average delay are given, on which the optimum number of FMCUs in such network is obtained.

针对中小型变电站自动化系统中通信网络的特点 ,首先采用概率统计的基本方法分析了现场测控单元 (简称为 FMCU)数据产生的规律 ,然后对 FMCU内部的各个程序段进行了较为详细的讨论 ,确定了 FMCU的 CPU资源对轮询 (polling)周期的约束条件。在逐一分析了轮询周期的组成部分之后 ,给出了在上述约束条件下的现场级通信网络稳态性能指标 ,即信道利用率、数据平均发送延时与轮询周期及 FMCU数目之间相互关系的表达式。在此基础上提出了确定通信网络最佳FMCU配置数目的方法。

In this paper some most adaptive communication mechanics for distributed multi-nodes communication system is discussed mainly from attributes of various signals which are transmitted in industrial process. Further development situation and possible development trends of industrial Ethernet are described, and some problems to must be solved are discussed when Ethernet extend to field layer. At last, it is pointed to that the reasonable and feasible development of industrial Ethernet would be combination...

In this paper some most adaptive communication mechanics for distributed multi-nodes communication system is discussed mainly from attributes of various signals which are transmitted in industrial process. Further development situation and possible development trends of industrial Ethernet are described, and some problems to must be solved are discussed when Ethernet extend to field layer. At last, it is pointed to that the reasonable and feasible development of industrial Ethernet would be combination with fieldbuses.

文章主要从工业过程对所传递的各种信号的属性出发,讨论对于分布式多节点通信系统最适宜的通信机制。并以此为基础,进一步阐述工业以太网的发展状况和可能的发展动向,还讨论了以太网向现场层延伸必须解决的一些问题。最后指出,目前工业以太网合理而可行的发展是与现场总线相结合的路线。

The whole procedure of development and design of fieldbus control system of steel ball pulverizers in fossil-fired power plant is described in detail from both theoretical and practical aspects. This includes determining control strategy based on characteristic of the object; investigating feasibility of implementation of control strategy in fieldbus control system; implementing the host monitoring layer and field layer, etc. From...

The whole procedure of development and design of fieldbus control system of steel ball pulverizers in fossil-fired power plant is described in detail from both theoretical and practical aspects. This includes determining control strategy based on characteristic of the object; investigating feasibility of implementation of control strategy in fieldbus control system; implementing the host monitoring layer and field layer, etc. From results of real time simulation and field operation,it is proven that the FCS control system designed offers excellent applicable effectiveness.

从理论和实践两个角度详细阐述了火电厂球磨机现场总线控制系统设计开发的完整过程 ,包括根据受控对象特性确定控制方案、控制方案在现场总线控制系统中实现的可行性论证以及上位监控级和现场级的实现方法和过程等部分。从实时仿真和现场运行的结果看 ,所设计的FCS取得了较好的应用实效。

 
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