Intelligent Measurement System Design for Mechanical Properties of Sediments in All-sea-depth

Ocean research and development has entered the era of all-sea-depth technology. A sediment mechanical property survey system with all-sea depth capability is very important in seabed resource exploration and research. This study used the in-situ test system of sediment mechanical properties as the object of study and designed an intelligent measurement system for all-sea-depth static touch exploration test, cross-board shear test, full-flow penetration test, and in-situ sampling function, which combines the characteristics of difficult communication, multiple uncertainties, small range of changes in shear strength of deep-sea sediments, and the influence of sea pressure on mechanical properties, according to the specifications and conventions of deep-sea sediment soil mechanical tests. The implementation of the system relies on the ARM+FPGA structure on the hardware and the state machine design mode of the software and satisfies the requirements of the all-sea-depth test on responsiveness and fault tolerance. A series of sample soils and sea experiments have demonstrated that the system can work at all-sea depths and accurately test the mechanical properties of sediments.