共查询到20条相似文献,搜索用时 62 毫秒
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针对目前自动引导小车(AGV)导航精度低、轨迹柔性差等问题,提出一种基于视觉和RFID的AGV复合导航方法。利用RFID读取AGV所处站点的射频卡信息,采用视觉技术检测地标相对于AGV的位置并纠偏,实现AGV导航定位;在视觉定位中引入卡尔曼滤波,提高AGV的导航精度和稳定性;在地图构建中,采用地标图案中嵌入射频卡的方式建立网格型地图,保证轨迹的柔性。结果表明:所提出的复合导航方法具有较高的定位精度,平均轨迹误差为5.85 mm,平均角度误差为0.65°,可以满足实际应用需求。 相似文献
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基于计算机视觉的自动浇注系统 总被引:4,自引:0,他引:4
提出一种基于计算机视觉的自动浇注系统。长期以来,由于没有有效的方法测量浇口杯内的铁水液位,浇注一般都是用人工控制。自动浇注系统是采用摄像机拍摄浇注过程,经过图像采集和处理,计算出浇口杯内铁水液位高度,通过实时控制铁水的浇注流量,使浇口杯内液位按工艺维持在一定高度,从而实现了自动浇注。实验证明此系统控制性能良好。 相似文献
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针对磁导航自动导引车(Automated Guided Vehicle,AGV)的路径跟踪问题,以前轮舵机转向、后轮电机差速驱动型AGV为研究对象,首先对AGV进行运动分析,建立了前轮转角与后轮转速之间的关系,提出了一种改进的模糊PID控制算法分别设计了转向模糊控制器与转速模糊控制器,实时根据路况合理调整舵机转角和电机... 相似文献
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为了解决手机无线充线圈人工贴中转膜过程中存在效率低、易出错等问题,设计一款基于视觉的无线充线圈自动贴膜机。根据工艺要求,设计自动贴膜机硬件系统,包括中转膜出料机构、空间四轴运动机构、视觉系统部件、线圈工位运行装置等;视觉系统采用上、下相机,分别对线圈及中转膜进行图像采集,以海康威视VisionMaster为视觉算法平台进行图像处理与编程。从无线充线圈自动贴膜机实际使用情况看出,设备运行良好,生产效率提高了6倍,产品合格率达到99.9%,达到了预期的目标,经济效益大大提高。 相似文献
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风力发电机组等大型装备零部件螺栓的紧固及上扭是制造过程中的关键工序之一.针对风电设备轮毂系统螺栓紧固现有技术存在的问题进行分析,提出了基于视觉技术的自动扫描三维模型重构、螺栓孔位自动定位及装配路径自动规划的全新工艺方案;在此基础上,设计了将螺栓自动紧固、上扭分开的基于机器人的整体布局方案,并对自动专用紧固工具、变位机等... 相似文献
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基于计算机视觉反馈的AGV定位停车研究 总被引:1,自引:0,他引:1
为了实现AGV的准确定位停车,采用视觉反馈法。首先经过图像处理,当发现定位停车标志符后,小车记录此时标志中心点到车辆中心的距离,并根据直线运动公式对距离进行判断,当距离为零时,小车停止。在标志符识别及配准过程中,采用了统计特征区域黑点数与模板图中的黑点数对比来筛选模板的方法以减少模板匹配的计算量,并利用SSDA算法进行图像配准。结果表明:在标识符形状差别较大、黑点数距离比较远的情况下,点的匹配率达到98%,识别准确率较高。 相似文献
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3D reconstruction of environment and weld workpiece can provide geometrical model for telerobotic welding and improve its intelligence.A novel framework of spacetime stereo is employed to overcome the lack of texture of the weld workpiece and obtain subpixel disparity map of the scene.Anisotropic diffusion is adopted to smooth the original subpixel disparity map in order to reduce the noise while preserving the depth discontinuity.A simple algorithm of generation triangle mesh surface from the disparity map of the spacetime stereo is presented.The experimental results of real weld scenes are shown. 相似文献
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在遥控焊接中采用立体视觉传感建立焊接工件的三维模型时,视差图的分割是重要步骤之一.文中对经典USF平面距离图分割算法进行改进,通过增加区域合并步骤,使之能够分割含有圆柱面的立体视差图.区域合并步骤分为边界探测和合并曲面两步.在边界探测步骤记录平面分割所得区域的边界像素;合并曲面步骤通过比较相邻区域的边界像素间的法向量夹角和距离,判断相邻区域是否属于同一曲面,并将属于同一曲面的区域赋予相同的标签.文中给出了马鞍形工件的立体视差图分割结果,证明了算法的可行性.Abstract: In remote welding, the segmentation of disparity map is an important step to create 3D model of weld workpiece by stereo vision sensor. In this paper, the USF plane range image segmentation algorithm was introduced into disparity map segmentation, and by a region combination step, the revised algorithm can deal with the disparity map containing cylinder surface. The combination step could be divided into boundary detecting and curve region relabeling. During boundary detection, the pixel at the boundary of the segmented region after plane segmentation was recorded. In curve region relabehng, the adjacent regions in the same curved surface were assigned with the same label by comparing the boundary pixels' normal direction and distance between them. A segmented result of disparity map of saddle workpiece is shown to prove the feasibility of the algorithm. 相似文献
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针对逆向工程中直接从线激光扫描的数据云图中提取物体边界不仅繁琐而且精度也不好保证,为此提出建立线激光—机器视觉测量系统,先利用三日视觉获得物体初始边界,然后利用曲线延拓的方法并考虑影响延拓误差的因素,从而在满足一定精度要求的前提下实现不同传感器信息的融合。 相似文献
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The dynamic deformation behavior of Al 2024 composites reinforced with 1 and 8 μm SiCp (15 vol.%) has been investigated in
the temperature range of 370 to 500°C and strain rate range of 0.1 to 3.0/sec by torsion testing. Processing maps showing
the variation of the efficiency of power dissipation expressed by [2m/(m+l)], where m is the strain rate sensitivity, with
temperature and strain rate have been described for the composites. Also, the domain of dynamic recrystallization (DRX) and
peak efficiency of the composites were analyzed to suggest an optimum hot working condition for DRX. The SiCp/A12024 composite
with 8 (μm SiCp showed 40% efficiency at the DRX domain (370~460°C, 0.1~0.5/sec). The optimum temperature and strain rate
condition for the DRX of the composites is 430~450°C and 0.5/sec. The characteristics of these results were discussed with
the help of microstructural observation during hot deformation.
This article based on a presentation made in the symposium “The 1st Korea—Japan Structural Dynamic Symposium”, held at Sunchon National University, Sunchon, Korea, August 5–8, 1999 under the
auspices of The Korean Insitute of Metals and Materials and Research and Development Center for Automobile Parts and Materials. 相似文献
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Ching-Chih Tai Ming-Chih Huang 《International Journal of Machine Tools and Manufacture》2000,40(13):1913-1927
The purpose of this paper is to describe an approach to process the data points, measured from existing objects, for feature-curve fitting in reverse engineering. In the field of reverse engineering, the major problem is that the original measured points with irregular format, and unequal distribution, and lack of appropriate segmentation are difficult to fit into a curve in CAD systems. Therefore, the technology of restoring and segmenting data points is greatly needed to construct the model of an existing object. The proposed approach has been developed to process the measured points with designer interaction to segment and regenerate the data points with the format, in which the points meet the requirements fitting into a B-spline curve with good shape and high quality. This approach consists of five steps: (1) sampling data points; (2) regressing the sampled points into an explicit non-parametric equation; (3) filtering the unwanted points with pre-determined tolerance; (4) regressing the residual points; and (5) regenerating data points from the second-time regressed equation. The proposed approach has been implemented by using an example for practical application, and the result proves the viability of the proposed approach integrating with the current commercial CAD systems. 相似文献
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提出应用一种神经—模糊推理系统对发动机有关设计计算中的数据进行映射辩识,以提高数据的结构化程度、加快计算速度,以利于编程处理,消除知识的“组合爆炸”现象。建立了一个神经网络系统与之进行应用比较,通过对具体数据的实际操作表明,应用这种方法能够很好地表达原图表数据关系。同时相对于单纯应用人工神经网络方法,它的数据识别精度更高,速度更快,能够满足设计计算要求。 相似文献
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