Study of Remote Monitoring and Maintenance Guiding Technique Based on LabVIEW for Machining Centers

The virtual instruments （VIs）, as a new type of instrument based on computer, has many advanced attractive characteristics. This research is based on Vls, and brings condition monitoring and knowledge-based maintenance support together through an integrated （including hate.met, ASP. NET, XML tochnique, Vls） network environme~. Within the enviromnent, machining centers operators, engineers or managers can share real-time data through the browser-based interface and minimize machining centers downtime by providing status monitoring and remote maintenance guiding from service centers.

Remote Plasma Maintenance in Low-Pressure Discharges with an External Magnetic Field

The spatial structure of remote plasma regions in rf discharges is analyzed based on a 2D model of free-fall regime discharge maintenance. Since the study is directed towards description of the magnetic filter region in the tandem plasma sources of negative hydrogen ions, hydrogen discharges are considered, with a weak magnetic field located outside the region of the rf power deposition. With the formation of different regions in the discharge—the rf power deposition region, the region with electron magnetization, the transition between them and the region behind the filter—the results display superimposed effects of nonlocal discharge maintenance without and with a magnetic field. Slight decrease of the electron temperature accompanied with strong drop of the electron density is the “pure” effect of the plasma expansion in regions without external magnetic field. Strong drop of the electron temperature accompanied with formation of a maximum of the electron density in the filter region is the “pure” effect of the plasma expansion through a magnetic field. Based on the results for the spatial distribution of the electron density and temperature obtained with shifting the position of the magnetic filter, optimization of the source regarding high yield of volume-produced negative ions is discussed.

Effect of water-sediment regulation and its impact on coastline and suspended sediment concentration in Yellow River Estuary

Implementation of the water-sediment regulation(WSR) scheme, mainly focused on solving the sedimentation problems of reservoirs and the lower reaches of the Yellow River, has inevitably influenced the sediment distribution and coastal morphology of the Yellow River Estuary.Using coastline delineation and suspended sediment concentration(SSC) retrieval methods, this study investigated water and sediment changes,identified detailed inter-annual and intra-annual variations of the coastline and SSC in the normal period(NP: 1986-2001, before and after the flood season) and WSR period(WSRP: 2002-2013, before and after WSR). The results indicate that(1) the sedimentation in the low reaches of the Yellow River turned into erosion from 2002 onward;(2) the inter-annual coastline changes could be divided into an accretion stage(1986-1996), a slow erosion stage(1996-2002), and a slow accretion stage(2002-2013);(3) an intra-annual coastline extension occurred in the river mouth in most years of the WSRP; and(4) the mean intra-annual accretion area was 0.789 km^2 in the NP and 4.73 km2 in the WSRP,and the mean SSC increased from 238 mg/L to 293 mg/L in the NP and from 192 mg/L to 264 mg/L in the WSRP.

Impact Analysis of Coastal Engineering Projects on Mangrove Wetland Area Change with Remote Sensing

In the past decades, two large scale coastal engineering projects have been carried out in the Deep Bay surrounded by Shenzhen City and Hong Kong Special Administrative Region. One project is Shenzhen River channel regulation and the other is the sea reclamation along the seashore on the Shenzhen side. The two projects are very close to the two national nature reserves, specifically Futian in Shenzhen and Mai Po in Hong Kong, which are important wetland ecosystems worldwide. This paper aims to identify and monitor the mangrove wetland changes with time series of Landsat Thematic Mapper images pre and post to the two engineering projects being launched. Coupled analysis of the image interpretation results and tidal data acquired at the same time in the context of the two works reveals that the mangrove wetland area has increased from year 1989 to 1994, and has changed little from year 1994 to 2002. Binary coding is applied to reveal the distribution image of mangrove at each phase, and the coding image shows that the construction of the two coastal engineering projects has caused frequent changes in mangrove spatial distribution. The study also shows that the change is not significant regarding to the precision of the method and the natural evolution of mangrove wetland, and the projects do not cause apparently influences upon the two national mangrove conservation zones at least for the research time period.

Modeling and Assessing a New Warship Maintenance System

The authors developed a prototype of a warship maintenance system. The process started by defining the maintenance requirements of warship equipment. Next, a planning scheme was development for a maintenance network. An optimization target for the plan and indexes for assessment were established. Based on the above work, a simulation model was proposed with two layers: a base and a workshop. Dispatching rules were then formulated for the simulation. Experimental results proved the validity of the model and the dispatching algorithm. It was found that the model can solve the capacity evaluation problem for maintenance systems and provides a scientific basis for decision-maker to make decisions regarding equipment maintenance.

Research on Source Maintenance Key Technology of the Smart Substation

The source maintenance technology of the smart substation offers the base for the models, data and graphs sharing between the substation and the dispatch center. This paper researches on the conversion technology between SCD model in IEC 61850 Ed. 2 and the CIM model in IEC 61970. The substation provides SVG and SCD documents to the dispatch center, which includes primary equipment information and the network topology. The dispatch center’s automation system completes the conversion between the two models. This paper researches on the smart remote technology, which uses IEC 61850 as communication protocol. It can filter and restructure communication data based on the needs of different dispatch center. At the same time, it can provide quality control of communication link, to ensure that the important data be sent in real time.

Development and Application of a Heating Remote Monitoring System Based on KingSCADA

A remote monitoring system for a secondary heating pipe network is designed on the basis of the KingSCADA software.Remote data communication is implemented through the IP mapping technology.Remote data are sorted through IOServer,and the remote monitoring of the pipe network unit port return is implemented accordingly.Using data such as water temperature and pressure of the water supply and return pipes,valve opening can be remotely adjusted to optimize the performances of the network to meet user needs in real time.The research results show that this remote monitoring system displays a reasonable degree of stability and efficiency in remote communication.

Regulation of Brahmaputra-Jamuna River around Jamuna Bridge Site, Bangladesh: Geoenvironmental Impacts

This study is conducted to evaluate the ongoing geoenvironmental impacts of Brahmaputra-Jamuna (BJ) River around the Jamuna Bridge (JB) site which was modified prior to the construction of Jamuna Bridge in 1996. Remote sensing and GIS techniques are adopted to evaluate the temporal and spatial geohazards. This study shows that the intensity of channel shifting has been increased due to regulation of river width at Sira-jganj–Bhuiyapur section from 11 km to 4.8 km. Planform analysis shows that the major channel has been stressed to migrate (315 m/year) eastwards. The phenomena of channel changes are predicted to be the con-sequences of interaction of water flow, sedimentation and channel corridor. The erosion and deposition have complicated variations over time and space due to the abrupt changes of flow and sedimentation around the regulated section. Due to width reduction, the bridge site in the braided system acts as sluice gate which can not accommodate the entire flow to release downstream properly. The helical flow developed with the inter-action of guide bund creates local scours and helps to shift the river bank eastward.

Differential expression of genes involved in the epigenetic regulation of cell identity in normal human mammary cell commitment and differentiation

The establishment and maintenance of mammary epithelial cell identity depends on the activity of a group of proteins, collectively called maintenance proteins, that act as epigenetic regulators of gene transcription through DNA methylation, histone modification, and chromatin remodeling. Increasing evidence indicates that dysregulation of these crucial proteins may disrupt epithelial cell integrity and trigger breast tumor initiation. Therefore, we explored in silico the expression pattern of a panel of 369 genes known to be involved in the establishment and maintenance of epithelial cell identity and mammary gland remodeling in cell subpopulations isolated from normal human mammary tissue and selectively enriched in their content of bipotent progenitors, committed luminal progenitors, and differentiated myoepithelial or differentiated luminal cells. The results indicated that, compared to bipotent cells, differentiated myoepithelial and luminal subpopulations were both characterized by the differential expression of 4 genes involved in cell identity maintenance: CBX6 and PCGF2, encoding proteins belonging to the Polycomb group, and SMARCD3 and SMARCE1, encoding proteins belonging to the Trithorax group. In addition to these common genes, the myoepithelial phenotype was associated with the differential expression of HDAC1, which encodes histone deacetylase 1, whereas the luminal phenotype was associated with the differential expression of SMARCA4 and HAT1, which encode a Trithorax protein and histone acetylase 1, respectively. The luminal compartment was further characterized by the overexpression of ALDH1A3 and GATA3, and the down-regulation of NOTCH4 and CCNB1, with the latter suggesting a block in cell cycle progression at the G2 phase. In contrast, myoepithelial differentiation was associated with the overexpression of MYC and the down-regulation of CCNE1, with the latter suggesting a block in cell cycle progression at the G1 phase.

A Study on a Remote Monitoring and Diagnosis System and Its Application

Remote monitoring and diagnosis （RMD） is a new kind of monitoring and diagnosis technology that combines computer science, communication technology and fault diagnosis technology. Via the Internet a remote monitoring and diagnosis system can be established. In this paper, the model of an Internet based remote monitoring and diagnosis system is presented; the function of every part of the RMD system is discussed. Then, we introduce a practical example of a remote monitoring and diagnosis system that we established in a factory; its traits and functions are described.

Development of an E-maintenance System for a CNC System

Globalization and rapid growth of network technologies have changed the traditional patterns of device maintenance. E-maintenance has emerged and is widely used in many manufacturing systems. In this paper, a new architecture of an E-maintenance system is proposed, which consists of E-maintenance centre, embedded CNC gateway and CNC terminal. The E-maintenance centre provides the technical support and service for customers based on Internet and communication technologies. The embedded CNC gateway serves as an agent between the public and plant device network, and provides web-based access for the CNC system. A reconfigurable CNC terminal is highly desired in a signal measuring and analysing system, which is built on the top of component and software bus based models. Finally, the E-maintenance system for the CNC machine is implemented and the experiments show that the architecture of an E-maintenance system can effectively reduce the downtime of devices, the responding time of maintenance work, and increase both the quality and the productivity of enterprises.

煤矿掘进机机电设备故障诊断与维护

针对煤矿掘进机机电设备传统故障诊断方法效率较低、故障识别较为困难、潜在故障无法及时发现等问题,本文对煤矿掘进机机电设备故障诊断与维护技术进行研究。在分析了掘进机关键结构常见故障和监测方法的基础上,提出了煤矿掘进机故障监测与智能诊断系统,完成硬件系统选型和软件控制系统设计,实现了对掘进机机电设备运行状态实时监控和远程运维,转被动维护为主动维护,提高了设备运行可靠性,降低了设备维护成本,提高了机电设备故障诊断效率。经安装调试后表明:当掘进机关键部位出现异常现象时可准确识别,并且故障响应时间仅为1.28 s,故障发现率达97.8%,对潜在故障准确识别和判断,智能诊断系统极大提高了设备故障诊断效率,故障排除时间降低为97.3%。

带式输送机智能化发展现状研究

带式输送机作为煤矿运输的关键装备,通过与智能化技术深度融合,成为智慧矿山建设的重要组成部分。从安全生产、可靠运行、高效运输、无人化作业4个智能化应用场景目标出发,列举了视觉分析、全生命周期监测、智控调速、巡检集控平台等带式输送机智能化关键技术应用现状,结合现场反馈,明确在安全预警、专家库模型、输送带精准调控、无人巡检作业等方面尚存在问题。结合技术发展趋势,给出了以大数据技术与带式输送机远程运维控制中心为基础、以透明化感知应用与全矿井智能运输体系为依托、通过工业级信息交互与数据挖掘手段、实现带式输送机安全可靠高效无人化的目标,为推动智能矿山新质生产力提供支撑。

论单梁桥式起重机电路检修技巧

本文通过对型号为L010-13A5D单梁桥式起重机电气设备检修技术的钻研,重点论述起重机电气主电路和二次控制电路在工作中突发故障,地面控制失灵,起重机远离检修保养平台的情况下,采取有效的技术措施,利用智能无线遥控设备,对起重机的主电路和控制电路进行优化设计,使起重机还能通过智能无线遥控设备开回检修平台,避免了维修电工高空带电作业存在的风险,确保作业人员安全、高效地排除故障,保证起重机恢复正常的运行性能。

矿井提升系统常见故障类型分析与诊断技术研究

针对矿井提升系统故障形式复杂、故障类型多样、传统故障诊断结果不准确等问题,本文对矿井提升系统常见故障类型和特征进行分析,指出了矿井提升机常见电动机故障、齿轮箱故障和减速机故障的原因和故障主要特征,确定了不同故障异常特征检测点的位置。建立了矿井提升机多维数据融合故障智能诊断系统,以现场实际应用的立式缠绕式双滚筒提升系统进行案例分析,在对应的部位安装传感器采集异常特征,对异常进行可视化分析,不同的故障类型得到振动曲线不同,通过对异常振动曲线可以判断提升系统故障类型。现场试验表明采集到的异常分析过程仅用时1.43 s,异常识别准确率高达98.4%,取得了满意的试验结果.

煤矿井下水泵房巡检机器人系统设计与应用

针对煤矿井下水泵房传统工人巡检存在劳动强度大、巡检耗时较长、成本较高、检测结果不准确等问题,本文对煤矿井下水泵房智能巡检机器人系统进行研究,采用模块化和轻量化设计思想,在分析水泵房巡检内容和要求的基础上,提出了一种履带式水泵房智能巡检机器人系统,实时采集井下水泵房现场被参数信息,代替工人完成井下水泵房的巡检任务。完成了智能巡检机器人硬件系统设计,利用模块化思想编写了控制系统程序,并且编写了巡检轨迹程序,可根据设定的轨迹自主巡检。经在山西某煤矿进行现场调试和试运行表明,井下水泵房智能巡检机器人系统可代替4~6名工人实施巡检,降低了工人劳动强度,巡检周期从单日1次增加到单日3次,巡检效率大大提高,机器人本体移动定位误差≤5 cm,能准确获取设备运行异常特征并报警。

基于云计算和MQTT协议的自备电厂远程运维系统

基于云计算和MQTT协议的远程运维系统旨在提升自备电厂运维的安全、可靠、经济、环保性和智能化水平。对此,详述该系统的总体设计,包括远程监控系统需求分析、整体架构以及子系统设计。其中子系统设计涵盖厂站端监控系统、MQTT智慧网关、云计算主站系统、远程主站运维系统和客户端监控应用等;讨论MQTT协议的特点及在数据安全、完整性和远程管理方面的机制。最后得出该系统能满足自备电厂远程运维需求的结论,并指出下一步工作重点是数据标准化和智能故障诊断。

Interactions between remote ischemic conditioning and post-stroke sleep regulation

Sleep disturbances are common in patients with stroke,and sleep quality has a critical role in the onset and outcome of stroke.Poor sleep exacerbates neurological injury,impedes nerve regeneration,and elicits serious complications.Thus,exploring a therapy suitable for patients with stroke and sleep disturbances is imperative.As a multi-targeted nonpharmacological intervention,remote ischemic conditioning can reduce the ischemic size of the brain,improve the functional outcome of stroke,and increase sleep duration.Preclinical/clinical evidence showed that this method can inhibit the inflammatory response,mediate the signal transductions of adenosine,activate the efferents of the vagal nerve,and reset the circadian clocks,all of which are involved in sleep regulation.In particular,cytokines tumor necrosis factorα(TNFα)and adenosine are sleep factors,and electrical vagal nerve stimulation can improve insomnia.On the basis of the common mechanisms of remote ischemic conditioning and sleep regulation,a causal relationship was proposed between remote ischemic conditioning and post-stroke sleep quality.

继电保护远程运维系统报文合规检测及入侵阻断技术应用

继电保护远程运维中数据传输各环节存在网络入侵风险,现有安全措施未有效处理业务层风险,且存在风险阻断不及时等问题。为此,提出一种报文合规检测方法及入侵阻断技术,分析报文的对象、格式、业务逻辑和行为模式,建立报文合规规则库及不合规报文阻断策略,设计开发不合规报文阻断模块及“一键阻断”紧急控制模块。通过模拟仿真环境测试,结果表明,上述技术对不同类型异常报文进行的阻断效果与预期一致,可有效阻断非法入侵攻击,从而提高继电保护远程运维的安全性和稳定性。

ITMA ASIA+CITME2022上新一代信息技术应用浅析

探讨ITMA ASIA+CITME2022上众多新一代信息技术的应用情况。从车间物流数字孪生、原棉精细化管理、细纱机单锭监测、设备远程运维等不同角度,梳理了展会上新一代信息技术应用场景及解决方案。指出:纺机企业研发方向主要面向高效节能、高附加值纺织品的数字化、自动化和智能化生产与质量管控;新一代信息技术使得纺织产业数字化升级更加快速和高效,纺织生产整体智能化水平明显提升;基于工业互联网的纺织产业新生态正在加快形成。认为:新一代信息技术与纺织产业的融合应用,推动了产品研发、制造、服务等环节的协同创新,助力企业实现提质增效与高质量发展的战略目标。