Biomimetic Hydrodynamic Sensor with Whisker Array Architecture and Multidirectional Perception Ability

Area of Science:

• Biomimetics and Sensor Technology
• Oceanography and Robotics

Background:

• Advancements in underwater robotics necessitate sophisticated sensing for tasks like target tracking and communication.
• Existing methods face challenges in complex underwater environments, requiring improved hydrodynamic perception.

Purpose of the Study:

• To introduce a multidirectional hydrodynamic sensor inspired by seal whiskers.
• To leverage biomimetic design and magnetic self-decoupling for robust underwater sensing.

Main Methods:

• Developed a sensor array mimicking the undulated surface structure of seal whiskers.
• Utilized magnetic 3D self-decoupling theory for wireless connectivity and watertightness.
• Integrated biomimetic principles to enable perception of arbitrary water flow motions.

Main Results:

• The sensor accurately detects steady flow velocity (RMSE < 0.061 m s⁻¹) and direction.
• It measures dynamic vortex wake frequency with high precision (error < 0.05 Hz).
• The sensor determines vortex wake source orientation within a 7° error margin.

Conclusions:

• The biomimetic whisker sensor offers a novel solution for underwater hydrodynamic sensing.
• Its capabilities are crucial for advancing ocean exploration, underwater robotics, and deep-sea communication.
• The design simplifies device construction and enhances operational reliability in marine environments.