Optimal scanning strategy for on-machine inspection with laser-plane sensor

Abstract

The purpose of this paper is to propose a scan path planning method for on-machine measurement (OMM) in a 5-axis machine-tool. Sensor accessibility can be enhanced using the 5 degrees of freedom and the spindle rotation. The laser-plane sensor replacing the cutting tool in the spindle enables to reduce the measurement time and thus allows for rapid decision-making concerning the geometrical conformity of manufactured parts and potential machining corrections. The scan path planning is based on the control of the overlap between two consecutive passes by managing the orientations and the coverage rate of laser beam. Therefore, both scanning quality and scanning time can be controlled by optimizing the overlap zones. In this paper, we adapt the method previously developed for 6-axis robots to a 5-axis machine-tool.

Improved Calibration of Eye-in-Hand Robotic Vision System Based on Binocular Sensor

“…As shown in Figure 1a, the measured point M (X, Y, Z) is captured by the binocular sensor. The projection from two-dimensional (2D) coordinates (u l(r) , v l(r) ) in the left or right image coordinate system (ICS) to three-dimensional coordinates (X, Y, Z) in the world coordinate system (WCS) is subjected to (1),…”

“…Both the support and application of robotic vision systems are intrinsically tied to the growth of the manufacturing industry. Applications of these systems include inspection [1], robotic welding [2], robotic grinding [3], etc. These systems, combined with a binocular sensor [4][5][6][7] and a six-degree-of-freedom (6-DOF) industrial robot, are widely applied in the industrial field and possess the properties of high efficiency, high flexibility and good economy.…”

Ultrafast Laser Surface Functionalization and Route to Industrial Applications: Computer-Vision-Based Path Planning

“…However, upscaling local laser texturing on large and freeform surfaces remains a challenge for the deployment of the technology at an industrial level. In this concern, path planning [1,2] appears as a crucial preliminary step to succeed in an accurate and fast process. In the present work, we develop a methodology delivering an optimal scan path from a 3D point cloud on the surface to be laser treated.…”

Simultaneous Hand–Eye and Intrinsic Calibration of a Laser Profilometer Mounted on a Robot Arm

“…However, the angles were limited to minimize the influence of the robot positioning inaccuracy. This is vital in applications where the robot orientation must be changed during the scanning to be perpendicular to the measured surface, such as the case of 3D seam tracking [ 4 ] or geometry inspection of parts with complex shapes [ 30 ].…”