引用本文:李会军,瞿孝昌,叶宾.基于未知物体三维点云特征的机器人六自由度抓取[J].控制理论与应用,2022,39(6):1103~1111.[点击复制]
LI Hui-jun,QU Xiao-chang,YE Bin.Six-degree-of-freedom robot grasping based on three-dimensional point cloud features of unknown objects[J].Control Theory and Technology,2022,39(6):1103~1111.[点击复制]
基于未知物体三维点云特征的机器人六自由度抓取
Six-degree-of-freedom robot grasping based on three-dimensional point cloud features of unknown objects
摘要点击 2689  全文点击 726  投稿时间：2021-05-15  修订日期：2022-03-17
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DOI编号  10.7641/CTA.2021.10403
  2022,39(6):1103-1111
中文关键词  机器人抓取  点云特征  卷积神经网络  力平衡  非结构化环境
英文关键词  robotic grasping  point cloud feature  convolutional neural network  force balance  unstructured environment
基金项目  国家重点研发计划项目(2020YFB1314102), 徐州市科技重点研发计划项目(KC20020)资助.
作者单位邮编
李会军 中国矿业大学 221116
瞿孝昌* 中国矿业大学 221116
叶宾 中国矿业大学 
中文摘要
      针对非结构化环境中任意位姿的未知物体, 提出了一种基于点云特征的机器人六自由度抓取位姿检测方 法, 以解决直接从点云中获取目标抓取位姿的难题. 首先, 根据点云的基本几何信息生成抓取候选, 并通过力平衡等 方法优化这些候选; 然后, 利用可直接处理点云的卷积神经网络ConvPoint评估样本, 得分最高的抓取将被执行, 其 中抓取位姿采样和评估网络都是以原始点云作为输入; 最后, 利用仿真和实际抓取实验进行测试. 结果表明, 该方法 在常用对象上实现了88.33%的抓取成功率, 并可以有效地拓展到抓取其他形状的未知物体.
英文摘要
      In this paper, a six-degree-of-freedom robot grasp detection method based on point cloud features is proposed to address the challenging problem of directly obtaining the grasp pose of unknown objects in unstructured environments from the point cloud. Firstly, several grasp candidates will be sampled with essential geometry information of the point cloud, and optimized through methods such as force balance. Secondly, each grasp candidate is evaluated through Conv- Point, a convolutional neural network which can directly process point cloud of object, then the grasp candidate with the highest score will be executed. Both grasp sampler and grasp evaluation network take 3D point clouds observed by a depth camera as input. Finally, the performance of the proposed method is measured with simulation experiments and practical test. The results show that our approach achieves 88.33% success rate on various commonly used objects, and generalizes well to other objects of unknown shape in unstructured environments.