轮胎外观质量自动检测装置的设计与分析

发布时间：2018-01-19 03:17

本文关键词： 轮胎外观质量自动检测装置结构设计有限元分析　出处：《青岛科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：轮胎外观质量是最直观评价轮胎品质的指标,对其评估是轮胎质量检测中的重要环节。当前国内外的轮胎外观质量在线检测仍多依靠人力完成,存在检测效率低、人为因素影响大、劳动强度高等缺点。近几十年机器视觉检测技术在多个领域的缺陷检测方面得到推广和应用,为轮胎缺陷检测装置研发提供了技术基础。对此,本文主要针对轮胎外观质量自动检测装置设计与分析方面开展了如下研究:(1)总结了轮胎存在的外观质量缺陷,分析了其特征及分布规律,提出了按照缺陷产生区域及类型的划分方法。(2)结合轮胎外观质量人工检测工艺,规划了基于机器视觉技术的轮胎外观质量自动检测系统的总体设计方案,确定了系统主要由机械单元、控制单元、图像采集和图像处理单元构成,选定了多相机同时自动检测和轮胎自动旋转的检测方法采集轮胎内外表面图像信息。(3)从轮胎外观检测需要的胎圈夹持、子口扩张和轮胎旋转等动作入手,分析了各动作机构间的逻辑关系、结构形式及驱动方式等,并对轮胎外观检测装置进行了结构设计。(4)建立了转臂的转动角度和胎圈夹持机构可夹持轮胎内径及转臂的转动角度和接触处(轴套和旋转套与轮胎胎圈)受力的数学模型。通过MATLAB绘图分析得出:在轮胎胎圈夹持机构的几何关系及轮胎重量确定的情况下,接触处的临界法向力nF及圆周力tF的大小不随转臂的转动角度改变而变化。(5)借助有限元分析软件ANSYS Workbench的Mechanical模块对轮胎外观检测装置的驱动轴系进行了静力学分析,同时对机架进行了模态分析,结果表明了设计结构的合理性。(6)提出了轮胎内外表面图像采集元件选择方案,规划了检测元件布置及调整方法,依照待测轮胎的相关技术参数和区域划分方法,选定了相机和二维激光传感器。
[Abstract]:Tire appearance quality is the most intuitive evaluation of tire quality, and evaluation is an important part of tire quality testing. At present, domestic and foreign tire appearance quality online inspection still rely on manpower to complete. In recent decades, machine vision detection technology has been popularized and applied in many fields, such as low detection efficiency, great influence of human factors, high labor intensity and so on. It provides a technical basis for the research and development of tire defect detection device. This paper mainly focused on the design and analysis of tire appearance quality automatic testing device as follows: 1) summed up the tire appearance quality defects, analyzed its characteristics and distribution law. The overall design scheme of tire appearance quality automatic inspection system based on machine vision technology is proposed according to the partition method of defect producing area and type. The system is mainly composed of mechanical unit, control unit, image acquisition and image processing unit. The automatic detection method of multi-camera and tire automatic rotation is selected to collect the image information of tire inner and outer surface. (3) starting with the actions of tire appearance inspection, such as bead clamping, sub-mouth expansion and tire rotation, etc. The logical relationship, structure and driving mode of each action mechanism are analyzed. The rotation angle of the rotating arm and the inner diameter of the tire and the rotation angle and contact point of the rotating arm (axle sleeve and rotary sleeve and tire bead) are established. The mathematical model of force. Through the MATLAB drawing analysis: in the case of tire bead clamping mechanism geometric relationship and tire weight determination. The magnitude of the critical normal force nF and the circumferential force tf at the contact point does not change with the rotation angle of the rotating arm. With the help of the Mechanical module of the finite element analysis software ANSYS Workbench, the static analysis of the driving shafting of the tire appearance detection device is carried out. At the same time, the modal analysis of the frame is carried out, and the results show the rationality of the design structure. (6) the selection scheme of the image acquisition elements on the inner and outer surface of the tire is proposed, and the layout and adjustment method of the detection elements are planned. According to the relevant technical parameters and area division method of the tire to be tested, the camera and the two-dimensional laser sensor are selected.
【学位授予单位】：青岛科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U463.341;TP391.41

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