At present, the Korean Institute of Marine Science and Technology has recently developed the world’s largest and deepest underwater walking robot-Crabster CR200, which is quite like a giant robot crab. Its weight At 635 kilograms, it can explore the seafloor like a real crustacean, using complex mechanics to hold it in place.
The crab robot is expected to be used in scientific survey projects, such as repairing undersea facilities such as oil and gas pipelines. In the concept video, the team envisions a crab robot grabbing objects and loading them into a compartment similar to a large mouth structure, which may not have these characteristics in practical applications. Based on its size and weight, this robot can replace scuba divers in operating under strong ocean currents. It can be fixed under strong ocean currents, lower its "head", raise its tail, and face the ocean current head-on. The crab robot is equipped with 11 cameras, including an acoustic camera that observes the blurry seawater by reflecting sound waves and captures real-time video. A color high-definition camera can zoom in on the survey target at close range, and the survey data is sent through a 500-meter-long tether so that the operator can control the crab robot.
The robot uses Doppler to measure the speed and direction of water flow, while acoustic pulses establish communication on the seafloor to determine its location. The robot can use sonar to create a 3D image of the water environment and move at a speed of 1.6 kilometers per hour underwater. It was built by engineers from the Korea Institute of Marine Science and Technology and conducted its first underwater test in the summer of 2013. Scientists plan to test the Crabster CR200 to a depth of 200 meters, and then deploy it in the Yellow Sea to conduct seabed surveys to help archaeologists explore shipwrecks in the 12th century.
