共查询到19条相似文献,搜索用时 484 毫秒
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工业无线作为新兴的工业技术,为解决工业现场的布线、监控、生产线的扩展提供了一种新的解决途径。ISA100.11a是现行主流工业无线协议之一,具有良好的稳定性和抗干扰性。基于ISA100.11a协议开发的无线通信模块针对不同于其他工业现场的冶金环境而研制,通过在冶金工业现场的实验测试,验证具有和国外设备相接近的性能,但具有更低廉的价格,为推广应用奠定基础。 相似文献
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本文以WirelessHART、ISA 100.11a、WIA-PA标准为例介绍工业无线技术及其各种标准。某油气田采用智能无线适配器THUM+AMS,进行无线、数字化改造,以其工艺单元的自控系统方案为例说明工业无线技术的应用。 相似文献
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工业无线通信是革命性技术,近年来发展迅猛,工业衡器厂商应尽快推出无线化的产品,满足用户的需求。本文首先介绍了三个工业无线通信标准:WirelessHART、ISA100.11a和WIA-PA,然后简述了工业无线通信系统架构,最后详细介绍了工业衡器产品无线化的三个途径:自行开发全套无线产品,通过通用接口与无线模块集成,产品集成。 相似文献
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系统管理器作为ISA100.11a网络的中枢,其合理的设计是整个网络高效运行的保证。针对系统管理器的基本任务以及对数据处理的高效性和可靠性等要求,提出了一种系统管理器结构设计方案,并对系统管理器中的各模块功能以及设备入网管理和冗余管理进行了详细的描述和分析,并用代码实现。通过测试,文章描述的系统管理器设计方案能够高效可靠的处理其他节点发送过来的消息。 相似文献
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针对现有的远程监测终端直接与Internet相连存在IP资源浪费和运行成本较高的问题,提出基于ISA Server防火墙的分布式信息远程传输方案.基于ISA Server防火墙的Browser/Server(B/S)通信架构和Windows集成身份验证原理,解析出嵌入式设备通过ISA Server防火墙实现远程通信的流程;在ARM7处理器上实现简化的超文本传输协议和3DES加密算法,研制出支持Windows集成身份验证的分布式监测终端.实际应用表明,该终端支持ISA Server防火墙进行跨局域网通信,满足大规模、远程化监测的要求. 相似文献
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针对柔性自动化物流仓库作业中自动运载机器人K iv a的充电调度问题,构造了以最小化总加权充电完成时间为优化目标的调度模型,该模型可最大化K iv a在仓库作业过程中的使用率.由于此类调度问题的计算复杂性较高,提出了一种新的问题求解近似算法.通过将原复杂充电调度问题分解为若干独立的子问题,应用半定规划求解子问题的半定松弛,并设计了基于子问题松弛解的局部搜索算法,得到了子问题的可行解并组合成原充电调度问题的近优解.通过分析一系列数值算例计算结果可以发现,该近似调度算法相比其他现有算法可获得更佳的K iv a充电调度方案. 相似文献
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陕西省三门峡库区洪水预警预报系统共设中心站两处,遥测站49处.系统设计为自报式和查询~应答相结合的工作体制.本系统拟采用超短波通信和GSM短信息通信的星型网结构的组网方式.本文介绍了陕西三门峡洪水预报系统的站网布设、系统总体结构、通信组网方式和洪水预报调度方案. 相似文献
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This paper presents the interior search algorithm (ISA) as a novel method for solving optimization tasks. The proposed ISA is inspired by interior design and decoration. The algorithm is different from other metaheuristic algorithms and provides new insight for global optimization. The proposed method is verified using some benchmark mathematical and engineering problems commonly used in the area of optimization. ISA results are further compared with well-known optimization algorithms. The results show that the ISA is efficiently capable of solving optimization problems. The proposed algorithm can outperform the other well-known algorithms. Further, the proposed algorithm is very simple and it only has one parameter to tune. 相似文献
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本文介绍了一种包括数据采集硬件及数据处理软件的高速数据采集系统。硬件部分为高速单片机DSC875 2 0控制的高速数据采集卡 ,通过ISA总线与工控机连结 ,主要采用了ISA总线技术、I/O接口技术和中断技术。用DELPHI语言编写的软件系统对数据进行分析和处理。本系统的特点在于该系统在单片机的控制下实现高速数据采集 ,采样频率可达 1~ 2MHz。该系统可靠性高 ,抗干扰能力强 ,造价低廉 相似文献
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传统光栅测量设备采用ISA总线,而ISA总线传输速度低,不能满足高精度和高实时性的测量需求.设计并实现了一种基于FPGA和单片机的高性能PCI数据采集卡,使用Verilog HDL语言对FPGA进行编程,使FPGA实现对光栅信号的细分、辩向和计数功能;通过单片机读取FPGA可逆计数器内的数据并进行缓存和传输;设计了上位机和该数据采集卡的通信接口,PC机通过该通信接口对测量数据进行读取和处理. 相似文献
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In this paper, a new meta-heuristic optimization technique, called interior search algorithm (ISA) with Lèvy flight is proposed and applied to determine the optimal parameters of an unknown infinite impulse response (IIR) system for the system identification problem. ISA is based on aesthetics, which is commonly used in interior design and decoration processes. In ISA, composition phase and mirror phase are applied for addressing the nonlinear and multimodal system identification problems. System identification using modified-ISA (M-ISA) based method involves faster convergence, single parameter tuning and does not require derivative information because it uses a stochastic random search using the concepts of Lèvy flight. A proper tuning of control parameter has been performed in order to achieve a balance between intensification and diversification phases. In order to evaluate the performance of the proposed method, mean square error (MSE), computation time and percentage improvement are considered as the performance measure. To validate the performance of M-ISA based method, simulations has been carried out for three benchmarked IIR systems using same order and reduced order system. Genetic algorithm (GA), particle swarm optimization (PSO), cat swarm optimization (CSO), cuckoo search algorithm (CSA), differential evolution using wavelet mutation (DEWM), firefly algorithm (FFA), craziness based particle swarm optimization (CRPSO), harmony search (HS) algorithm, opposition based harmony search (OHS) algorithm, hybrid particle swarm optimization-gravitational search algorithm (HPSO-GSA) and ISA are also used to model the same examples and simulation results are compared. Obtained results confirm the efficiency of the proposed method. 相似文献
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ISA S88.01 [1] [ISA (ANSI/S88.01.1995), Standard batch control; part 1: models and terminology, Instrument Society of America, 1995] is a standard that provides a methodology for the dissemination of a batch into standard models and provides the terminology for defining the control requirements of batch plants. The nature of S88 is such that it is not only applicable to the development of computer control systems for a batch plant, but also could be utilised within batch management software, i.e. scheduling. This paper presents a method of interpreting multi-purpose/product batch plant into S88 constructs to provide an object oriented framework for the research and development of a batch scheduling Matlab tool-box. Such a framework provides a thorough and efficient method of articulating the model to effectively apply automatic scheduling/optimisation methods. 相似文献