Opportunity
The exploration and monitoring of aquatic environments are critical for understanding water quality, detecting contaminants, and studying marine life. However, traditional robotic devices face significant challenges in such environments. Large-scale robots are often too bulky to navigate narrow or confined spaces, limiting their utility in pipelines, underwater caves, or other restricted areas. Additionally, conventional aquatic robots rely on batteries for power, which impose limitations such as added weight, limited operational lifespan, and increased resistance during movement. These constraints hinder the miniaturization and efficiency of robotic devices, making it difficult to deploy them for prolonged or precise monitoring tasks. Furthermore, existing sensors for detecting water quality parameters (e.g., ion concentrations) or biological contaminants (e.g., viruses) are often not integrated into compact, mobile platforms, reducing their practicality for real-time, in-situ analysis.
Technology
The Fish-Like Shape Robotic Device addresses these challenges through a biomimetic design and innovative wireless technologies. The robotic device mimics the shape and movement of a fish, enabling efficient propulsion in aquatic environments. It eliminates the need for batteries by incorporating a wireless power receiving module that harnesses radio frequency (RF) energy from an external transmitter coil. This module powers a driving mechanism consisting of an actuation coil and a magnet element, which generates oscillating Lorentz forces to vibrate a flexible tail, propelling the robot forward. The device also integrates multifunctional sensors embedded in its head portion, capable of detecting environmental characteristics (e.g., temperature, ion concentrations like NH₄⁺ and Cl⁻) and biological structures (e.g., SARS-CoV-2 virus). These sensors communicate data wirelessly via a near-field communication (NFC) circuit to a smartphone interface, enabling real-time monitoring. The robotic device’s compact, battery-free design, combined with its ability to navigate confined spaces and perform multimodal sensing, represents a significant advancement over conventional aquatic robots.
Advantages
- Battery-Free Operation: Eliminates the need for bulky batteries, reducing weight and enabling miniaturization.
- Wireless Power and Data Transmission: Uses RF energy for propulsion and NFC for data transfer, enhancing mobility and usability.
- Biomimetic Design: Fish-like shape and tail vibration mechanism allow efficient movement in confined or complex aquatic environments.
- Multimodal Sensing: Integrates chemical and biosensors for comprehensive environmental monitoring, including water quality and pathogen detection.
- Real-Time Data Access: Sensor data is wirelessly transmitted to a smartphone, enabling immediate analysis and decision-making.
- Centroid-Mass Alignment: Optimized design ensures stable and smooth swimming motion.
Application
- Environmental Monitoring: Detection of water quality parameters (e.g., ion concentrations, temperature) in pipelines, lakes, or oceans.
- Pathogen Surveillance: Early detection of viruses (e.g., SARS-CoV-2) in water supplies to prevent disease outbreaks.
- Industrial Inspection: Navigating and inspecting narrow or hazardous pipelines in water treatment plants or oil rigs.
- Marine Biology: Studying aquatic ecosystems with minimal disturbance to marine life.
- Disaster Response: Deploying in flooded or contaminated areas for rapid assessment.
