A Seabed Real-Time Sensing System for In-Situ Long-Term Multi-Parameter Observation Applications

Area of Science:

• Marine Science
• Ocean Engineering
• Sensor Technology

Background:

• Real-time in-situ observation is crucial for marine science and ocean engineering.
• Existing systems face limitations in long-term, multi-parameter data acquisition and reliable communication.

Purpose of the Study:

• To develop a robust seabed real-time sensing system (SRSS/ILMO) for in-situ, long-term, multi-parameter ocean observations.
• To integrate underwater acoustic and satellite communication for reliable data transmission.
• To ensure system reliability and user-configurability for diverse marine applications.

Main Methods:

• The SRSS/ILMO comprises a seabed observation system, a sea surface relay buoy, and a remote monitoring system.
• An "ARM + FPGA" architecture was employed for the seabed observation system, prioritizing low power consumption and versatility.
• System reliability was enhanced through a two-stage anti-crash mechanism, fault isolation, dual-medium data storage, and an improved Modbus protocol.

Main Results:

• The system successfully integrates underwater acoustic and satellite communication links.
• The "ARM + FPGA" architecture meets design requirements for low power consumption, scalability, and versatility.
• The developed system demonstrated effectiveness in a preliminary seabed engineering geology observation using resistivity and pore pressure sensors in a harbor environment.

Conclusions:

• The SRSS/ILMO provides an effective solution for real-time, in-situ, long-term multi-parameter marine observations.
• The system's design ensures high reliability and adaptability for various marine sensing tasks.
• Preliminary tests confirm the system's viability for applications in marine engineering geology and beyond.