Development of an artificial sensor for hydrodynamic detection inspired by a seal's whisker array

Area of Science:

• Biomimetics
• Fluid Dynamics
• Sensor Technology

Background:

• Biological sensory systems excel at detecting underwater stimuli.
• Artificial systems lag in underwater detection and monitoring capabilities.
• Seal vibrissae are highly effective for sensing hydrodynamic trails.

Purpose of the Study:

• To design a biomimetic fluid motion sensor array inspired by seal whiskers.
• To develop an artificial system for underwater wake detection and tracking.
• To create a foundation for biomimetic fluid sensor technology.

Main Methods:

• Designed the Wake Information Detection and Tracking System (WIDTS) with whisker-like elements.
• Trained a harbor seal to track a submarine while wearing the WIDTS.
• Collected sensor data on whisker element deflection angles in hydrodynamic trails.

Main Results:

• WIDTS sensors detected hydrodynamic disturbances corresponding to the submarine's wake.
• Sensor data correlated with the seal's ability to track the target.
• Proof-of-concept demonstration validated the WIDTS against the biological system.

Conclusions:

• The WIDTS prototype successfully mimicked seal whisker function for wake detection.
• This technology offers potential for military, commercial, and scientific underwater applications.
• The study provides a foundation for advancing biomimetic underwater sensor development.