Article(id=1157001744938000608, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1157001740768858346, articleNumber=null, orderNo=null, doi=10.19562/j.chinasae.qcgc.2024.07.012, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1695484800000, receivedDateStr=2023-09-24, revisedDate=1703001600000, revisedDateStr=2023-12-20, acceptedDate=null, acceptedDateStr=null, onlineDate=1753780312046, onlineDateStr=2025-07-29, pubDate=1721836800000, pubDateStr=2024-07-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753780312046, onlineIssueDateStr=2025-07-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753780312046, creator=13701087609, updateTime=1753780312046, updator=13701087609, issue=Issue{id=1157001740768858346, tenantId=1146029695717560320, journalId=1146120084050784272, year='2024', volume='46', issue='7', pageStart='1137', pageEnd='1334', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=0, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1753780311052, creator=13701087609, updateTime=1756792480363, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1169635694612853253, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1157001740768858346, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1169635694612853254, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1157001740768858346, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1249, endPage=1258, ext={EN=ArticleExt(id=1157001746468921577, articleId=1157001744938000608, tenantId=1146029695717560320, journalId=1146120084050784272, language=EN, title=A Mapping and Planning Method Based on Simplified Visibility Graph, columnId=null, journalTitle=Automotive Engineering, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Most of the current vehicle route planning is based on the grid map planning method, which will greatly increase the amount of calculation when the search area is large. In contrast, the method based on visibility graph can reduce the amount of calculation during path search, but is greatly affected by the complexity of obstacles. For this problem, combining the SLAM and visibility graph methods, a simplified visibility graph construction and planning method is proposed in this paper. Firstly, the improved SLAM algorithm is used to generate point cloud maps, and dynamic obstacles are removed. Then a visibility graph is generated, and the complex edges of polygons in the visibility graph are simplified based on the size of the obstacle and the size of the concave angle at the vertex to eliminate redundant vertices. Finally, through simulation experiments and real vehicle experiments, it is proved that compared with the original algorithm, this method can reduce the number of polygon vertices in the visibility graph by 20%-30% while ensuring the accuracy of mapping. The map update time and the running time of the overall algorithm are also reduced by more than 30%. It shows that the method in this paper can effectively reduce the amount of calculation and the running time of the algorithm in the mapping and planning process.
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当前车辆路径规划大部分是基于栅格地图的规划方法,这种方法在搜索面积较大时计算量也会大幅增加。相比之下,基于可视图的方法能够在路径搜索时减小计算量,但是受到障碍物复杂程度的影响较大。针对这一问题,本文结合SLAM和可视图的方法,提出了一种简化可视图的建图和规划方法。首先使用改进的SLAM算法生成点云地图,并进行动态障碍物的剔除。接着生成可视图,并基于障碍物的大小和顶点处内凹角的大小对可视图中多边形的复杂边缘进行简化,剔除冗余的顶点。最后通过仿真和实车实验证明,该方法相对原有的算法,在保证建图精度的情况下,可视图中多边形的顶点数量减少20%~30%,地图更新时间和整体算法的运行时间减少30%以上。这表明本文方法能够有效减小建图和规划过程的计算量和算法的运行时间。
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| 算法1 |
| 输入:点云地图 输出:多边形 1 通过点云地图 获取二值化地图I 2 使用均值滤波器,获取灰度图 3 基于注释中的方法,提取一组多边形 4 for 每个 do : 5 使用RDP方法减少顶点数量 6 检查每个顶点的内角,剔除小于阈值的顶点 7 生成局部地图中的多边形 8 end for |
), ArticleFig(id=1157001991642767880, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1157001744938000608, language=CN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 算法1 |
| 输入:点云地图 输出:多边形 1 通过点云地图 获取二值化地图I 2 使用均值滤波器,获取灰度图 3 基于注释中的方法,提取一组多边形 4 for 每个 do : 5 使用RDP方法减少顶点数量 6 检查每个顶点的内角,剔除小于阈值的顶点 7 生成局部地图中的多边形 8 end for |
), ArticleFig(id=1157001991714071050, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1157001744938000608, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 算法2 |
| 输入:多边形 输出:简化后的多边形 1 for 每个 do: 2 if 多边形的顶点数量 > 3 for 多边形的每个顶点 do 4 5 6 7 8 9 = 10 end for 11 for 多边形的每个顶点 do 12 13 14 if < and < 15 break 16 end if 17 if < 0 18 if > 19 break 20 end if 21 end if 22 将该点放入新多边形 的点集中(该点不满足任 一剔除条件) 23 end for 24 end if 25 end for |
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| 算法2 |
| 输入:多边形 输出:简化后的多边形 1 for 每个 do: 2 if 多边形的顶点数量 > 3 for 多边形的每个顶点 do 4 5 6 7 8 9 = 10 end for 11 for 多边形的每个顶点 do 12 13 14 if < and < 15 break 16 end if 17 if < 0 18 if > 19 break 20 end if 21 end if 22 将该点放入新多边形 的点集中(该点不满足任 一剔除条件) 23 end for 24 end if 25 end for |
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| 算法3 |
| 输入:可视图、起点、终点 输出:最短路径 1 创建一个空队列Q 2 将起始节点加入队列Q 3 标记起始节点为已访问 4 while Q 非空且终点未被访问时 do : 5 当前节点从队列Q中移出 6 处理当前节点 7 if 当前节点等于终点 do 8 结束算法 9 for 当前节点的每个邻居节点 do 10 if 邻居节点未被访问 do 11 将邻居节点加入队列Q 12 标记邻居节点为已访问 13 end for |
), ArticleFig(id=1157001991915397648, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1157001744938000608, language=CN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 算法3 |
| 输入:可视图、起点、终点 输出:最短路径 1 创建一个空队列Q 2 将起始节点加入队列Q 3 标记起始节点为已访问 4 while Q 非空且终点未被访问时 do : 5 当前节点从队列Q中移出 6 处理当前节点 7 if 当前节点等于终点 do 8 结束算法 9 for 当前节点的每个邻居节点 do 10 if 邻居节点未被访问 do 11 将邻居节点加入队列Q 12 标记邻居节点为已访问 13 end for |
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| 项目 | 原始程序 | 本文方法 | 优化效果 |
| 全局地图顶点数量 | 934 | 719 | 23% |
| 平均算法运行时间/ms | 10.68 | 7.02 | 34% |
), ArticleFig(id=1157001992024449556, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1157001744938000608, language=CN, label=表1, caption=
实车实验数据对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 原始程序 | 本文方法 | 优化效果 |
| 全局地图顶点数量 | 934 | 719 | 23% |
| 平均算法运行时间/ms | 10.68 | 7.02 | 34% |
), ArticleFig(id=1157001992087364118, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1157001744938000608, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 原始程序 | 本文方法 | 优化效果 |
| 平均局部地图顶点数量 | 84.28 | 51.42 | 39.9% |
| 全局地图顶点数量 | 957 | 675 | 29.5% |
| 平均地图更新时间/ms | 12.04 | 8.18 | 32.0% |
), ArticleFig(id=1157001992141890071, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1157001744938000608, language=CN, label=表2, caption=
实车实验数据对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 原始程序 | 本文方法 | 优化效果 |
| 平均局部地图顶点数量 | 84.28 | 51.42 | 39.9% |
| 全局地图顶点数量 | 957 | 675 | 29.5% |
| 平均地图更新时间/ms | 12.04 | 8.18 | 32.0% |
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