Path planning of a laser-scanner with the control of overlap for 3d part inspection

Abstract This paper proposes a new approach to scan path planning for automated inspection of manufactured parts with an industrial robot based on the control of the overlap between 2 successive scanning paths. The novelty lies in the use of the least-squares conformal map, which stretches a 3D surface on a 2D plane. Equidistant paths calculated in the 2D space are transformed into equidistant paths in the 3D space. Controlling the overlap can maximize the coverage region on the scanned part. On the other hand, digitizing quality is ensured by managing the sensor configuration relatively to the part with respect to quality criteria. The approach is implemented with success for a laser-plane scanner mounted on an industrial robot.

[1]  Charyar Mehdi-Souzani,et al.  A knowledge database of qualified digitizing systems for the selection of the best system according to the application , 2016 .

[2]  F Xi,et al.  CAD-based path planning for 3-D line laser scanning , 1999, Comput. Aided Des..

[3]  Guillermo Sapiro,et al.  Conformal Surface Parameterization for Texture Mapping , 1999 .

[4]  Sören Larsson,et al.  Path planning for laser scanning with an industrial robot , 2008, Robotics Auton. Syst..

[5]  Ahmet Can,et al.  A novel iso-scallop tool-path generation for efficient five-axis machining of free-form surfaces , 2010 .

[6]  Youlun Xiong,et al.  Tool path generation for triangular meshes using least-squares conformal map , 2011 .

[7]  Bruno Lévy,et al.  Mesh parameterization: theory and practice , 2007, SIGGRAPH Courses.

[8]  Qiang Zou,et al.  Tool path planning based on conformal parameterization for meshes , 2015 .

[9]  Bruno Lévy,et al.  Least squares conformal maps for automatic texture atlas generation , 2002, ACM Trans. Graph..

[10]  Shital S. Chiddarwar,et al.  Novel integrated offline trajectory generation approach for robot assisted spray painting operation , 2015 .

[11]  William Derigent,et al.  A new approach of the visibility calculation of an object , 2004, Int. J. Manuf. Technol. Manag..

[12]  Michaël Roy,et al.  3D part inspection path planning of a laser scanner with control on the uncertainty , 2011, Comput. Aided Des..

[13]  Michel Véron,et al.  Visibility Theory Applied to Automatic Control of 3D Complex Parts Using Plane Laser Sensors , 2000 .

[14]  De Xu,et al.  Path planning for surface inspection on a robot-based scanning system , 2015, 2015 IEEE International Conference on Mechatronics and Automation (ICMA).

[15]  Charyar Mehdi-Souzani,et al.  Voxel-based Path Planning for 3D Scanning of Mechanical Parts , 2014 .

[16]  Tomáš Koutecký,et al.  Sensor planning system for fringe projection scanning of sheet metal parts , 2016 .

[17]  Christophe Tournier,et al.  A Surface Based Approach for Constant Scallop HeightTool-Path Generation , 2002 .