基于计算机视觉的船舶主机气缸润滑管理  

Computer vision-based lubrication management of ship main engine cylinders

作　　者：张桂臣[1] #高荣华 张春昌 李毅凡 ZHANG Guichen;GAO Ronghua;ZHANG Chunchang;LI Yifan(Merchant Marine College,Shanghai Maritime University,Shanghai 201306,China)

机构地区：[1]上海海事大学商船学院,上海201306

出　　处：《中国航海》2024年第2期40-47,共8页Navigation of China

基　　金：国家自然科学基金项目(51779136)。

摘　　要：气缸注油率调节不及时以及气缸润滑状况不可直接测量等问题,一直是轮机管理的难点。分析气缸油碱值和注油率对气缸润滑的影响,针对扫气道残油碱值和含铁量检测存在的不足,提出基于计算机视觉的气缸润滑图像处理方法。将活塞和缸套的图像进行归一化、聚类、分割和形态特征提取等操作,基于Hu不变矩和卷积神经网络迁移学习的以图搜图技术开发气缸润滑质量分析软件,有效解决了气缸注油率人工调节的不确定性及失误概率大的难题,并将其应用于某超大型油船主机气缸润滑最优管理。应用结果表明:借助气缸润滑图像的计算机视觉深度学习可优化气缸注油率,实现了扫气道残油含铁量不高于25 mg/kg,残油碱值不低于30 mgKOH/g,缸套磨损率不高于0.1 mm/kh的气缸润滑最优控制,降低了缸套过度磨损的风险。该方法具有较好的推广应用价值和经济效益。Problems in cylinder lubrication process,such as untimely adjustment,unavailability of direct measurement and inaccuracy in measurement,are always dfficult points in marine engineering management.This paper analyzes the influence of cylinder oil alkali value and oil injection rate on cylinder lubrication,and proposes the image processing method of cylinder lubrication based on computer vision in view of the deficiencies in the detection of residual oil alkali value and iron content in the swept airway.The images of piston and cylinder liner are subjected to normalization,clustering,segmentation and morphological feature extraction,and the cylinder lubrication quality analysis software is developed based on Hu invariant moments and the map searching technology of convolutional neural network migration learning,which effectively solves the difficult problem of the uncertainty of the manual adjustment of the cylinder lubrication rate and the high probability of error,and applies to the optimal management of cylinder lubrication for the main engine of very large crude carriers.Application results show that:with the cylinder lubrication image,the computer vision deep learning can optimize the cylinder oiling rate,realizing the optimal control of the cylinder lubrication:iron content of the residual oil in the airway is not higher than 25 mg/kg,residual oil alkali value is not less than 30 mgKOH/g,the cylinder liner wear rate is not higher than O.1 mm/kh,reducing the risk of excessive wear of the cylinder liner.The method has good popularization value and economic benefits.

关 键 词：船舶柴油机 气缸润滑 计算机视觉 气缸注油器 

分 类 号：U664.121.1[交通运输工程—船舶及航道工程]