Research on Electrical Automation Control Design Based on PLC Technology

As science and technology continue to progress forward,electrical automation engineering is also developing,of which programmable logic controller(PLC)technology is widely being used.Through the integration of PLC technology and traditional electrical automation technology,good development of modern science and technology is promoted while traditional automation is preserved.The development of electrical engineering can greatly improve the strength of science,technology,and economy in our country.Based on PLC technology,this paper analyzes the design of electrical automation control.

Programmable Logic Controller Block Monitoring System for Memory Attack Defense in Industrial Control Systems

Cyberattacks targeting industrial control systems(ICS)are becoming more sophisticated and advanced than in the past.A programmable logic controller(PLC),a core component of ICS,controls and monitors sensors and actuators in the field.However,PLC has memory attack threats such as program injection and manipulation,which has long been a major target for attackers,and it is important to detect these attacks for ICS security.To detect PLC memory attacks,a security system is required to acquire and monitor PLC memory directly.In addition,the performance impact of the security system on the PLC makes it difficult to apply to the ICS.To address these challenges,this paper proposes a system to detect PLC memory attacks by continuously acquiring and monitoring PLC memory.The proposed system detects PLC memory attacks by acquiring the program blocks and block information directly from the same layer as the PLC and then comparing them in bytes with previous data.Experiments with Siemens S7-300 and S7-400 PLC were conducted to evaluate the PLC memory detection performance and performance impact on PLC.The experimental results demonstrate that the proposed system detects all malicious organization block(OB)injection and data block(DB)manipulation,and the increment of PLC cycle time,the impact on PLC performance,was less than 1 ms.The proposed system detects PLC memory attacks with a simpler detection method than earlier studies.Furthermore,the proposed system can be applied to ICS with a small performance impact on PLC.

Application Strategy of PLC Technology in Energy-Saving Control of Tunnel Lighting

In this study,we investigated on the application of planar lightwave circuit(PLC)technology in energy-saving control of tunnel lighting.The application status of PLC in the field of energy saving followed by the necessity of energy saving in tunnel lighting was analyzed.Finally,the application of PLC in tunnel lighting energy-saving control around the three dimensions of system overall architecture design,control scheme,and program control process was investigated.The results showed that the system meets the requirements of control effect,robustness,and visual effect after trial operation,and is suitable for practical applications.

基于PLC反渗透海水淡化控制系统的设计与开发

针对反渗透海水淡化系统工艺复杂、运维繁琐、对操作人员专业技能要求高的特点,研发了一套反渗透海水淡化控制系统。详细研究整个工艺系统中预处理、反渗透等关键工艺环节的原理及自动控制过程。从系统的硬件设计和软件开发两个方面进行详细阐述。硬件设计方面,根据装置规模和控制需求完成控制系统设备选型。软件开发方面,完成控制器及人机交互界面多套软件的开发。该系统成功应用于高校反渗透海水淡化教学实践课。应用结果表明:该系统设计合理、操作界面简洁方便,在稳定安全运行的同时可实现教学培训、故障处理等目的。该系统在提高海水淡化操作人员专业技能的同时,也对高校创新其他专业的实操培训课程提供了借鉴和技术支撑。

基于5G多接入边缘计算的云化PLC系统架构设计与应用

随着工业控制系统对柔性化、扁平化的要求不断提升,以PLC为构建基础的传统工业控制网络在大规模接入、算力提升和部署灵活性方面均受到限制.针对这些问题,融合5G网络和边缘计算技术,设计了基于5G多接入边缘计算的云化PLC系统架构,阐述了该架构的运行机制和所涉及的关键技术;在此基础上,进行PLC系统的云化部署和调试,实现了工业现场、企业数据中心、5G网络和边缘网络的集成;最后,通过在某汽车制造公司产线改造过程中的应用,验证了所提架构的有效性.

PLC技术的造纸机械设备自动控制系统设计与研究

新型造纸公司依托于高科技实现了生产流程的机械化和自动化,造纸行业的生产效率和效益都得到了提升。PLC技术在工业自动化生产中应用广泛,在造纸机械设备的应用有利于提高造纸设备的自动化运转,同时有助于提高产品的质量,节约产品的人力成本和时间成本等。对PLC技术进行了简要介绍,并讨论了其在造纸机械设备的应用的形式以及自动化设计系统的设计等,为造纸行业的进一步发展提供更多的技术支撑。

基于PLC的气动搬运机械手自动控制系统设计

为提高气动搬运机械手在复杂工厂流水线中的运行效率,该文设计了一套基于PLC的气动搬运机械手自动控制系统。在分析通用气动机械手将物品在不同位点之间搬运的运动流程的基础上,设计了自动控制系统的硬件架构。其中包含了可编程逻辑控制器(PLC)、伺服电机、传感器和交互屏等器件,并根据气动搬运机械手的运动流程,设计了相应的软件控制程序及界面。仿真实验结果证明,所提出的气动搬运机械手自动控制系统可以稳定地完成实验预设的功能需求,自动化程度较高。

机械自动化控制系统中PLC控制技术的实践

工业技术的快速发展极大地提升了企业生产效率,机械自动化控制已经成为工业生产的发展趋势。在机械自动化控制系统中,PLC控制技术不仅具有广泛适用范围,还具有较强的灵活性,有利于提升企业生产效率,促进生产力发展。基于此,阐述了PLC控制技术的特点和类型,分析了PLC控制技术在机械自动化控制系统中的应用优势,并深入分析PLC控制技术在机械自动化控制系统中的具体应用,以期为相关人员提供参考。

基于PLC的滤站自动控制系统设计

针对滤站的污水处理流程,设计基于可编程逻辑控制器(Programmable Logic Controller,PLC)的滤站自动控制系统,并详细阐述该系统的硬件设计、软件设计。通过应用自动控制系统,滤站能够自动完成污水处理流程,缩短人工时间,提高工作效率。

PLC技术在电气设备自动化控制中的应用

阐述PLC技术在电气设备自动化控制中的应用特点,包括可编程、灵活性、可靠性、实时性和可视化界面。探讨PLC技术在开关量控制、闭环控制、顺序控制中的控制应用。

基于案例驱动的“机床电气控制与PLC”教学探索与实践

“机床电气控制与PLC”是机械工程专业课程,随着工业机器人的发展,PLC技术在工业控制系统中发挥着越来越重要的作用,现阶段已经发展成为自动化行业的主流技术之一。本文结合我校应用型大学的办学理念,侧重于学生的实践能力培养,教学过程中以实际工程案例为驱动,将理论应用于实践中,在知识传授的同时,将德育元素融入教学内容,通过课程知识与工程实践联系,推进全员、全过程、全方位育人。

基于PLC的自动测流机器人系统设计

针对当前河道测流存在的效率和自动化程度较低、测量模式单一等问题,提出了一套基于可编程逻辑控制器(PLC)的河道自动测流机器人系统设计与实现方案。该机器人系统由运动系统、采集系统、人机交互以及远程通信四大模块组成。首先,设计了自动测流机器人系统的硬件结构,实现了自动测流机器人在河流轨道上运动、铅鱼收放等功能。然后,开发了基于PLC的测控系统,设计了PLC梯形图和硬件连接方案,实现了自动测流机器人运动控制。最后,自动测流机器人系统通过RS-485通信协议将多传感器采集的数据传输到操控屏,结合4G远程技术,实现了采集数据和操作指令的远程传输。通过现场模拟的采集测试,该机器人系统可实现自动测流、远程操控、故障自检等功能,并提供多种测量模式,满足河道测流的使用需求。该系统的设计为开展智能化河流数据采集的研究奠定了基础。

Real Time Control System for Metro Railways Using PLC & SCADA

This paper proposes to adopt SCADA and PLC technology for the improvement of the performance of real time signaling&train control systems in metro railways.The main concern of this paper is to minimize the failure in automated metro railways system operator and integrate the information coming from Operational Control Centre(OCC),traction SCADA system,traction power control,and power supply system.This work presents a simulated prototype of an automated metro train system operator that uses PLC and SCADA for the real time monitoring and control of the metro railway systems.Here,SCADA is used for the visualization of an automated process operation and then the whole opera-tion is regulated with the help of PLC.The PLC used in this process is OMRON(NX1P2-9024DT1)and OMRON’s Sysmac studio programming software is used for developing the ladder logic of PLC.The metro railways system has deployed infrastructure based on SCADA from the power supply system,and each station’s traction power control is connected to the OCC remotely which commands all of the stations and has the highest command priority.An alarm is triggered in the event of an emergency or system congestion.This proposed system overcomes the drawbacks of the current centralized automatic train control(CATC)system.This system provides prominent benefits like augmenting services which may enhance a network’s full load capacity and networkflexibility,which help in easy modification in the existing program at any time.

基于PLC的豆粕固态发酵温度控制系统设计与试验

为了在豆粕固态发酵过程中给微生物提供适宜的生长繁殖条件,达到良好的发酵效果,对温度变化复杂的发酵环境进行实时的温度监测和控制。采用PLC对发酵罐的温度进行PID闭环控制,设计以37℃为目标值的试验。结果表明,发酵的豆粕中多肽含量、ACE抑制活性在终点时分别达到4.45 g/kg,53.2%,分别比自然发酵状态下提高5.7%和9.92%,温度控制系统有效提高了豆粕发酵产物的质量。研究为面向生产的豆粕固态发酵提供理论基础。

基于PLC控制器的医院网络通信故障自适应监控系统

传统的医院网络通信故障监控系统未对故障警报信息进行分类,通信故障点定位不准确。为此,提出基于PLC控制器的医院网络通信故障自适应监控系统。采用BP网络对医院网络通信故障警报信息分类处理,通过人工神经网络对医院网络通信故障数据进行训练,依据BP神经网络计算动量项、速率以及抽象处理等不同的数据训练结果,对故障点定位分析。构建以UPnP技术为核心设计系统网络构架,为系统提供有力的实时数据支持,实现大数据量的远程实时在线监测。结果表明,所设计系统监控故障监控时延较短,能够实现故障精准定位,能够快速发现故障并及时报警。

Synthesis of Nonlinear Control of Switching Topologies of Buck-Boost Converter Using Fuzzy Logic on Field Programmable Gate Array (FPGA)

An intelligent fuzzy logic inference pipeline for the control of a dc-dc buck-boost converter was designed and built using a semi-custom VLSI chip. The fuzzy linguistics describing the switching topologies of the converter was mapped into a look-up table that was synthesized into a set of Boolean equations. A VLSI chip–a field programmable gate array (FPGA) was used to implement the Boolean equations. Features include the size of RAM chip independent of number of rules in the knowledge base, on-chip fuzzification and defuzzification, faster response with speeds over giga fuzzy logic inferences per sec (FLIPS), and an inexpensive VLSI chip. The key application areas are: 1) on-chip integrated controllers;and 2) on-chip co-integration for entire system of sensors, circuits, controllers, and detectors for building complete instrument systems.

基于PLC的仓库灯光指引系统

基于可编程逻辑控制器(Programmable Logic Controller,PLC)的仓库灯光指引系统,即利用灯光指引位置进行定位。该系统适用性广泛,不仅在仓储行业内使用,还可以应用在其他行业,为提高效率发挥重要作用。设计灯光指引系统可以实现客户端数据采集,客户端和下位机间的数据传输,以及下位机对LED灯进行驱动等功能。最后,系统利用不同灯号的不同颜色,表示不同功能的状态。

PLC技术在机械电气控制装置中的应用

在机械电气控制装置中,可编程逻辑控制器(PLC)技术扮演着关键角色,其应用类型包括集散型控制系统(DCS)和现场总线控制系统(FCS)。PLC技术在机械电气控制中的作用体现在实现机电一体化、提升抗干扰能力、控制功能的实现、自我检测、简化操作过程以及故障的诊断与处理等方面。具体应用策略包括在设备安全检测中的应用、空气压缩器控制、机械控制、捻线机控制等。