小波变换在减速器故障诊断中的应用

小波变换是一种时频域的信号分析方法,具有傅立叶变换无可比拟的优点,适应于对非平稳信号的处理,因而更适合于故障诊断领域。以实际测量的减速器信号为例,讨论了小波分析在信号消噪和设备故障状态的判断2个方面的应用。     

通风机故障监测和诊断研究

对矿井主通风机运行状况进行了分析，剖析了主通风机的故障机理和特点，研究了用现代科学技术对矿井主通风机故障进行预测与诊断的技术方法，探讨了各种最新技术方法的可行性与适用性，并指出了今后的发展方向。     

损伤自诊断机敏混凝土材料研究

具有机敏特性的水泥基复合材料日渐成为研究热点。本文研究了掺有碳纤维的混凝土材料在单轴受压和三点弯曲负荷下的电阻相对变化与材料内部损伤间关系，为开发具有自诊断功能的混凝土材料提供了材料基础。     

在役桥梁结构病害检测若干问题剖析

正值交通基础设施突飞猛进的发展时机,在役和新建的桥梁健康安全状况自然成为学术界和工程界的心腹问题。根据我国钢筋混凝土桥梁现役情况,从桥梁的桥面、上部结构、下部结构等方面剖析了桥梁结构病害,针对桥梁结构常规检测方法及部分新型的检测技术,结合武汉天兴洲长江大桥主桥通车试验与检测手段进行分析,就桥梁的安全运营与健康维护提出几点建议,以期为今后推广桥梁检测新技术,做好监测工作,延长现役桥梁承载力提供可靠方法。     

某办公楼改造工程电气设计及总结

既有建筑改造是电气设计中的一项重要内容,与新建工程的电气设计相比有其特殊性。本文以某办公楼改造电气设计为例,通过对该工程设计的总结和分析,提出了既有建筑改造工程的电气设计要点及绿色节能设计方法。     

矿井提升机减速器润滑磨损故障监测及诊断技术研究

为提高工作可靠性,构建本质安全生产环境,促进实现安全高效,研究了矿井提升机减速器润滑磨损故障监测及诊断技术,考察了监测采样的技术理论基础;采用油液分析与铁谱技术方法,分析了圆柱直齿轮、人字圆弧齿轮、滚动轴承及滑动轴承的摩擦学特性;建立了合理选油、适时换油、适时维护及预知检修等试验分析与判断决策模型,并举例说明如何应用。     

异步电动机故障诊断粒子群优化神经网络模型研究

为了提高异步电动机故障诊断的准确性,采用了一种自适应权重粒子群优化神经网络的方法,用于BP网络的初始权值优化,并用优化好的BP网络进行故障诊断。仿真结果表明,该算法克服了BP网络收敛速度慢、易陷入局部极小的问题,取得了较好的诊断效果。     

利用γ射线扫描技术检测反应器催化剂床层损坏故障

γ射线扫描检测是一项新型检维修辅助技术,能在不停工不影响生产的条件下快速、准确识辨反应器等炼化设备运行过程中存在的故障.对该技术的基本原理及在某醚化反应器过程故障扫描诊断中的应用情况进行了介绍,通过现场检测,认为采用该技术检测诊断炼化设备过程故障是可行的,在石化行业具有较好的应用前景.     

振动测试技术在木工机床轴承部件诊断中的应用

本文介绍现代振动测试技术方法,对木工机床轴承座部件的现状进行诊断工作,为确保企事业单位木工机床的安全运行,实现设备的预测维修,提高设备管理水平提供参考。     

Research and implementation practice of integrated process control technology at Baosteel

To improve the quality of outstanding products like automobile steel sheet etc.,Baosteel has spared no efforts to the studying and application of Baosteel integrated process control(BPC ) and diagnosis technology.In the light of the running mode of integrated process control,analysis and diagnosis,Baosteel has realized the full process including steel making,hot-rolling,cold-rolling data traceability.The research and implementation practice of the BPC systems,which specialized on iron and steel manufacturing process,mainly based on the key input variables(KIV) and keyoutput variables(KOV),has been constructed on the plant level and corporate level.Based on the BPC system,Baosteel has established a data processing platform to monitor and analysis the process data,puts forward a efficient data gathering technology,which directly gather the data from the cross-platform of different kinds of systems,such as the plant level process computer,PLC, DCS,PCS etc.In the mean time,a unique mass data processing technology has also been developed.The system can be used to reveal the latent rules between KIV and KOV during the melting and rolling of steel products.This artcal takes the cold products for example to explain the model establishing,applying and optimizing the design between the KIV and the KOV,aims to advance the products capability.During recent years,the BPC technology has been gradually developed from the point to the line,from the line to covered the plane,it has integrated the information technology,the statistical process control technology,the quality diagnosis technology into the steel products integrated management.The BPC system has been developed as a product quality management technology fulfilled with characteristic elements and efficiency,a unique path to continuously enhance the steel products performance.