测绘通报 ›› 2023, Vol. 0 ›› Issue (6): 129-133.doi: 10.13474/j.cnki.11-2246.2023.0180

• 技术交流 • 上一篇    下一篇

利用点云空间投影概率特征的隧道钢拱架检测与提取

孙森震1,2, 荆留杰1, 王力2   

  1. 1. 中铁高新工业股份有限公司, 北京 100071;
    2. 信息工程大学, 河南 郑州 450001
  • 收稿日期:2022-07-18 发布日期:2023-07-05
  • 作者简介:孙森震(1989-),男,博士,工程师,主要研究方向为精密工程测量。E-mail:sunsenzhen@126.com
  • 基金资助:
    国家自然科学基金(41501491);地理信息工程国家重点实验室开放基金(SKLGIE2020-Z-2-1);国家重点研发计划(2022YFB2602200)

Detection and extraction of tunnel steel arch using point cloud spatial projection features

SUN Senzhen1,2, JING Liujie1, WANG Li2   

  1. 1. China Railway Hi-Tech Co., Ltd., Beijing 100071, China;
    2. Information Engineering University, Zhengzhou 450001, china
  • Received:2022-07-18 Published:2023-07-05

摘要: 基于三维点云扫描的隧道钢拱架支护结构快速识别与提取是隧道专用设备智能化感知的关键环节,受隧道施工环境和成本限制,专用设备台车扫描的点云缺失了强度信息,增大了钢拱架点云提取分割的难度。针对这一问题,本文提出了一种利用点云空间投影概率特征的隧道钢拱架检测与提取方法。首先,根据隧道轴线和横断面对隧道点云进行空间投影,形成基于隧道横剖面的投影图像;然后,基于钢拱架点云投影分布的特征,并结合数字图像方法,检测钢拱架投影区域;最后,提取投影区域对应的钢拱架支护结构点云,分析钢拱架位置和状态。该方法通过设置投影参数保证基于单站点云扫描数据的拱架提取的准确性和灵活性,可应用于湿喷过程中钢拱架被混凝土覆盖情况下的拱架识别定位。

关键词: 隧道点云, 拱架识别, 空间投影, 图像检测, 拱架定位

Abstract: The rapid identification and extraction of tunnel steel arches supporting structures based on 3D point cloud scanning is the key link in the process of intelligent perception for tunnel special equipment. Due to the limitations of tunnel construction environment and cost, the point cloud scanned by special equipment trolleys lacks the strength information, which increases the difficulty of extracting and segmenting the point cloud of steel arches. Aiming at this problem, a method for detecting and extracting tunnel steel arches based on point cloud space projection features is proposed. Firstly, the tunnel point cloud is projected spatially according to the tunnel axis and transverse plane, forming a projected image based on the tunnel cross-section. Secondly, based on the characteristics of the point cloud projection distribution of steel arches, combined with the digital image method, the projection area of steel arches is detected. Finally, the point cloud of the steel arch supporting structure corresponding to the projection area is extracted to analyze the position and state of steel arch. This method ensures the accuracy and flexibility of arch extraction based on single-site cloud scanning data by setting projection parameters, and can be applied to the identification and positioning of steel arches when covered by shotcrete during wet spraying.

Key words: tunnel point cloud, arch identification, spatial projection, image detection, arch positioning

中图分类号: