ABSTRACT

Cracking is a common fault in asphalt and concrete pavements, which causes water damage and further defects if not repaired in timely fashion. Conventional pavement crack sealing methods based on machines and manual operations are generally subjective, labour-intensive, risky, and inefficient. A laboratory prototype of an automatic pavement crack sealing platform is proposed in this paper, which uses a modified three-dimensional (3D) printer and computer vision. A modified 3D printer based on fused deposition modelling (FDM) was combined with an image capturing platform, an image processing algorithm and a path planning method to form the automated pavement crack sealing platform, which can automatically detect pavement cracks and seal them with bitumen emulsion sealant. Specimens of concrete pavement slabs with cracks were produced in the laboratory to test the proposed method, and the cracks were then detected and sealed by the proposed platform. The results show that 3D printing is an effective method for automated pavement crack sealing, which is recommended in the field of automatic road maintenance and repair.

摘要

开裂是沥青和混凝土路面的常见故障，如果不及时修复，会导致水损坏和进一步的缺陷。传统的基于机器和人工操作的路面裂缝密封方法通常具有主观性、劳动强度大、风险大、效率低等特点。本文提出了一种自动路面裂缝密封平台的实验室原型，该平台使用改进的三维（3D）打印机和计算机视觉。基于熔融沉积建模（FDM）的改进型3D打印机结合图像采集平台、图像处理算法和路径规划方法形成路面裂缝自动封闭平台，可自动检测路面裂缝并用沥青乳液进行封闭密封剂。在实验室制作了带有裂缝的混凝土路面板试样来测试所提出的方法，然后通过所提出的平台检测和密封裂缝。结果表明，3D打印是一种行之有效的自动路面裂缝密封方法，在道路自动养护维修领域得到推荐。