Design of a Bio-Inspired Miniature Submarine for Low-Cost Water Quality Monitoring

• URL: http://arxiv.org/abs/2603.14244v1
• Date: Sun, 15 Mar 2026 06:37:45 GMT
• Title: Design of a Bio-Inspired Miniature Submarine for Low-Cost Water Quality Monitoring
• Abstract summary: This paper presents the design and experimental validation of a bio-inspired miniature submarine for low-cost water quality monitoring.<n>Inspired by the jet propulsion mechanism of squids, the proposed system employs pump-driven water jets for propulsion and steering.<n>The complete system can be constructed at a hardware cost of approximately $122.5, making it suitable for educational and environmental monitoring applications.
• Score: 2.0686678425459424
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Water quality monitoring is essential for protecting aquatic ecosystems and detecting environmental pollution. This paper presents the design and experimental validation of a bio-inspired miniature submarine for low-cost water quality monitoring. Inspired by the jet propulsion mechanism of squids, the proposed system employs pump-driven water jets for propulsion and steering, combined with a pump-based buoyancy control mechanism that enables both depth regulation and water sampling. The vehicle integrates low-cost, commercially available components including an ESP32 microcontroller, IMU, pressure sensor, GPS receiver, and LoRa communication module. The complete system can be constructed at a hardware cost of approximately $122.5, making it suitable for educational and environmental monitoring applications. Experimental validation was conducted through pool tests and field trials in a lake. During a 360 degrees rotation test, roll and pitch deviations remained within +/-2 degrees and +/-1.5 degrees, respectively, demonstrating stable attitude control. Steering experiments showed a heading step response with approximately 2 s rise time and 5 s settling time. Depth control experiments achieved a target depth of 2.5 m with steady-state error within +/-0.1 m. Field experiments further demonstrated reliable navigation and successful water sampling operations. The results confirm that the proposed platform provides a compact, stable, and cost-effective solution for small-scale aquatic environmental monitoring.

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