Underwater optical guiding and communication solution for the AUV and seafloor node

Area of Science:

• Robotics and Control Systems
• Optical Engineering
• Oceanography

Background:

• Autonomous Underwater Vehicles (AUVs) require robust navigation and communication systems for deep-sea operations.
• Existing systems often face limitations in view angle and miniaturization for small AUVs.
• Seabed observation networks offer potential for enhanced underwater connectivity.

Purpose of the Study:

• To design and develop an integrated optical system for laser positioning, guidance, and communication for AUVs.
• To overcome the view angle limitations of cylindrical underwater devices.
• To enable AUV navigation and visual contact with seabed network nodes.

Main Methods:

• Development of a node integrating laser positioning guidance and communication functions.
• Design of an optical system with a photodiode array to widen the receiver's view angle.
• Implementation of a positioning algorithm based on the optical lens and photodiode array.

Main Results:

• Experimental verification of the laser docking system's guiding and communication capabilities for AUVs.
• Demonstration of a 1 Mbit/s data rate at a 4 m distance in a pool experiment.
• Preliminary confirmation of positioning algorithms with discussion of error analysis.

Conclusions:

• The developed optical system effectively enhances the view angle for cylindrical underwater receivers.
• The integrated laser docking system supports AUV navigation and communication with seabed networks.
• The system shows promise for improving the operational capabilities of small AUVs in underwater environments.