Search Results (2)

Relying on the research and development project of an auxiliary device for a submarine cable to cross a steel pipeline, with regard to a long-distance submarine cable crossing a pipeline, combined with a pipe-climbing robot and the laying of the submarine cable, this paper developed a detection robot that walks along the outer wall of the cable inside the submarine casing. The non-enclosed four-bar linkage mechanism is adopted, a stepper motor is used to drive a roller to walk on the submarine cable, the diameter change of the submarine cable is recorded in real-time, the damage of the submarine cable is detected when it is moved along the submarine cable, and the walking experiment is carried out. The submarine cable diameter measurement verification experiment showed that the outer wall detection robot of the submarine cable could stably travel on the submarine cable, and at the same time, could measure the real-time diameter of the submarine cable and record the actual condition of the submarine cable through video. Full article

In this paper, a hybrid system topology with one-way wireless charging function and the function of the bi-directional data communication is proposed for the problem of electric energy replenishment and data transmission faced by robot fish in the implementation of autonomous submarine cable inspection. Three working modes of the system and the time-sharing multiplexing method are studied. In the power transmission mode, high-efficiency wireless charging is realized by utilizing the transmission characteristics of a series–series (SS)-type resonant network which involves series resonant networks in both the primary side and the secondary side. In the alignment detection and handshake communication mode, the charging platform distance recognition and the handshake signal transmission are implemented through a series–parallel (SP)-type resonant network based on the ASK (amplitude shift keying) modulation method. In the high-speed data transmission mode, the reverse (secondary to primary) high-speed transmission of the inspection data is achieved through a SP-type resonant network based on the OFDM (orthogonal frequency division multiplexing) modulation method. The three modes share the same coupled coils via a reconfigurable resonant network. The working principle of the system is expounded, the system characteristics under each working mode are analyzed, and the time-division multiplexing control strategy is given. The rationality and effectiveness of the scheme are verified by experiments. Full article