共查询到20条相似文献,搜索用时 31 毫秒
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油液在线监测系统中磨粒识别技术研究 总被引:1,自引:0,他引:1
针对磨损状态监测要求,构建了基于显微图像分析的油液在线监测系统。根据系统光路特点,对磨粒图像进行了基于彩色特征的转换,并通过与背景图像的差值处理来快速提取磨粒目标。基于最小二乘支持向量机设计了磨粒两类分类器,并利用粒子群优化算法对最小二乘支持向量机模型中的参数进行了优化选取;根据磨粒识别体系,设计了基于最小二乘支持向量机的磨粒综合分类器。最后,利用铁谱分析技术对系统性能和识别效果进行了检验,结果表明本系统具有较高的检测精度和识别效果。 相似文献
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油液监测分析应用系统数据库的研究 总被引:1,自引:0,他引:1
针对油液测试和分析的过程中,所产生的大量原始数据及一系列中间结果数据,为油燃监测技术的实施带来困难这一问题。本文建立了完整的油液监测数据库构架,并在数据库维护实践中,着重介绍了铁谱磨粒图像的采集、存储及提取磨粒图谱特征的方法。 相似文献
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铁谱分析技术是润滑油液分析技术的主导技术,是机械设备工况监测和故障诊断的主要技术手段之一。铁谱片上磨损颗粒间的区分是磨损颗粒识别和诊断的基础。针对铁谱图像中磨损颗粒形状和颜色分布的复杂性,利用数字图像处理技术,采用K-均值聚类法,对铁谱彩色图像进行了分割处理研究。试验结果表明,K-均值聚类法可以有效地分割彩色铁谱图像,将磨损颗粒提取出来,为铁谱图像的后续处理工作奠定了基础。 相似文献
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An on-line visual ferrograph (OLVF) characterized by direct reading and on-line analysis was developed based on magnetic deposition and image analysis. A digital sensor was integrated with a CMOS image sensor to obtain images of deposited wear debris under illumination conditions. An electromagnetic instrument was designed to deposit the wear debris flowing through an oil flow channel. The oil flow channel, fixed on the electromagnet, was arranged parallel to the magnetic flux in the air gap between two electromagnet poles. The deposition effect on wear debris was analyzed theoretically. The result shows that the wear debris in different sizes can be deposited in the same zone by controlling the oil flow rate and magnet field intensity. Corresponding application software for image sampling and processing was developed. An index of relative wear debris concentration, IPCA (Index of Particle Coverage Area), is given as an output in addition to wear debris images. Finally, two kinds of experiments were specified to assess the effect and validity of the OLVF. The results show that the OLVF has effective deposition and identification for both relatively large and small wear debris with rational control parameters. The validity examinations with the commercial particle quantifier (PQ) and direct reading ferrograph (DR) show that the OLVF has an approaching trend to the reference instruments in both heavily and lightly contaminated oil. 相似文献
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铁谱分析技术是一种常用的磨损监测技术。受限于高倍物镜下的景深限制,一张铁谱大磨粒图像往往只有局部聚焦清晰的特征。为了能够解决在高倍物镜下铁谱大磨粒图像的自动化清晰采集以及高质量图像融合问题,设计并构建一套自动化扫描显微系统,该系统可进行多焦点铁谱图像的自动扫描采集;同时,提出一种基于相位一致性的铁谱磨粒图像多焦点融合算法,对自动扫描的多焦点图像进行融合,得到清晰的磨粒图像。实验结果表明,设计的自动化扫描显微系统能快速完成多焦点铁谱图像的自动化采集流程,提出的图像融合算法相较于传统的小波图像融合算法具有更高的图像评价质量,并能获得更加清晰的图像边缘信息。 相似文献
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油液在线监测是设备润滑磨损状态监测技术发展的重要方向,而通信技术在油液在线监测控制系统中有着举足轻重的作用.针对设备润滑磨损监控开发的油液在线监测系统由上位机和下位机组成,采用以太网技术实现上、下位机的通信.上位机实现对被监测润滑油参数的实时显示、趋势分析、数据存储、数据导出、故障报警及诊断等;下位机集磨损、黏度等多种传感器采用PC104实现被监测润滑油数据的采集与处理,并利用嵌入式处理器中的异步通信接口(串口技术)与PC104进行数据交换,从而实现该技术在设备油液在线监测系统中的应用. 相似文献
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Automated classification of wear particles based on their surface texture and shape features 总被引:3,自引:0,他引:3
In this study, the automated classification system, developed previously by the authors, was used to classify wear particles. Three kinds of wear particles, fatigue, abrasive and adhesive, were classified. The fatigue wear particles were generated using an FZG back-to-back gear test rig. A pin-on-disk tribometer was used to generate the abrasive and adhesive wear particles. Scanning electron microscope (SEM) images of wear particles were acquired, forming a database for further analysis. The particle images were divided into three groups or classes, each class representing a different wear mechanism. Each particle class was first examined visually. Next, area, perimeter, convexity and elongation parameters were determined for each class using image analysis software and the parameters were statistically analysed. Each particle class was then assessed using the automated classification system, based on particle surface texture. The results of the automated particle classification were compared to both the visual assessment of particle morphology and the numerical parameter values. The results showed that the texture-based classification system was a more efficient and accurate way of distinguishing between various wear particles than classification based on size and shape of wear particles. It seems that the texture-based classification method developed has great potential to become a very useful tool in the machine condition monitoring industry. 相似文献