3D Laser Scanner for Underwater Manipulation.

Area of Science:

• Robotics
• Oceanography
• Computer Vision

Background:

• Autonomous underwater manipulation research has advanced simple tasks like object retrieval and connector mating.
• Existing mobile robotics research demonstrates complex tasks such as obstacle avoidance and 3D model-based object recognition for grasping.
• The underwater robotics community lacks real-time, low-cost 3D sensing capabilities comparable to land-based systems like Kinect.

Purpose of the Study:

• Introduce a novel underwater 3D laser scanner designed for enhanced underwater manipulation.
• Present a calibration method for integrating the 3D laser scanner with robotic manipulators.
• Demonstrate advanced underwater manipulation capabilities beyond the current state-of-the-art.

Main Methods:

• Development and implementation of a new underwater 3D laser scanner.
• A calibration procedure to determine the relative pose between the manipulator and the 3D laser scanner.
• Experimental validation using two distinct underwater manipulation systems: a fixed-base manipulator and a free-floating Underwater Vehicle-Manipulator System (UVMS).

Main Results:

• The developed underwater 3D laser scanner provides rich 3D environmental information crucial for complex manipulation.
• Successful demonstration of arm motion within an environment with unknown obstacles using an eight Degrees of Freedom (DoF) manipulator.
• Autonomous grasping of an object from the seabed using an eight DoF free-floating UVMS.

Conclusions:

• The new underwater 3D laser scanner significantly enhances the capabilities of autonomous underwater manipulation systems.
• The demonstrated advanced manipulation tasks, including obstacle avoidance and autonomous grasping, represent a leap beyond current underwater robotics.
• This technology paves the way for more sophisticated and autonomous operations in underwater environments.