System and method for inspecting fault submarine cable through remote-control underwater robot with cable

Abstract

The invention discloses a system and method for inspecting a fault submarine cable through a remote-control underwater robot with a cable and relates to the field of submarine cable inspection. Existing underwater robots cannot give consideration to working reliability and the inspection effect at the same time. The underwater robot comprises an underwater robot body and a working ship, wherein the working ship is connected with the underwater robot body through the umbilical cable; the underwater robot body comprises an ROV body, a floating body, a thruster, an illuminating and photographingdevice, a mechanical arm, an underwater positioning device and bottom feet. According to the technical scheme, the ROV underwater robot is adopted, propellers and side thrusters of the ship continuously run all the time, and therefore the umbilical cable of the underwater robot is prevented from being twisted into the propellers; moreover, the ROV underwater robot is directly powered by the working ship, inspection information acquired by the underwater robot is transmitted back to the working ship through the umbilical cable, the work is reliable, and loss is prevented; meanwhile, the underwater robot can carry instruments such as the mechanical arm, the inspection quality is effectively improved, and the instruments can be used for determining uncertain conditions.

Description

technical field [0001] The invention relates to the field of inspection of submarine cables, in particular to a system and method for inspection of faulty submarine cables by a remote-controlled underwater robot with cables. Background technique [0002] The underwater situation in domestic coastal areas is complex. The underwater geological conditions of the Bohai Sea, the Yellow Sea, the East China Sea and the South China Sea are very different. The submarine cables that have been laid are based on the actual situation of the project. The underwater laying location and laying environment are different. Due to the limitation of underwater engineering equipment in the early years, the submarine cables laid in the early days were almost all laid on the seabed in the open way, without corresponding protection measures, and were extremely vulnerable to damage from the natural environment and human activities. [0003] Submarine power submarine cables need regular maintenance af...

AI Technical Summary

Problems solved by technology

The biggest difference between them is that the ROV is connected to the surface mother ship through the umbilical submarine cable to achieve energy supply and fast signal transmission, so the operator can see the real-time underwater images or other detection data taken by the ROV through the monitor of the surface mother ship, and control The underwater navigation of the robot is limited by the umbilical submarine cable. Usually, the operating range is limited and the navigation flexibility is poor. It is easily affected by the activities of marine vessels. The submarine cable may also be entangled and broken, resulting in damage or loss of the robot.

AUV can be separated from the support of the surface mother ship, and has the advantages of energy independence, flexible maneuverability, and strong concealment. However, it is connected to the host computer through wireless. Once the communication module is damaged or interfered, it may be lost and has poor reliability. In addition, The AUV is powered by a battery, the power supply is limited, the underwater time is limited, and it cannot carry heavy mechanical arms and other instruments, which affects the inspection effect of the submarine cable. The fault point detection of the above two underwater robots is not ideal; cannot Taking into account the reliability of the work and the inspection effect

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