Monitoring the sea floor plays a major role in protecting marine systems by maintaining signs of tabs on species and habitats on the ocean bottom with different depths. This is done primarily by underwater robots that use optical imaging to collect high -quality data that can be fed in environmental models, and the data obtained through the sonar complements in extensive ocean notes.
Various underwater robots have been tried over the years, but many of them struggled to make notes close to the dimension because they disturb the local sea bottom by destroying coral and disrupting sediments. The Wang gang, from the Harbin Engineering University in China, and his research team recently developed a An underwater maneuvering vehicle This is more suitable for sea floor processes because it does not bother the local environment by floating over the sea floor and possessing a special engineering fan system for Manuever. These robots can be used to better protect the sea floor during their studies, and improve efforts to maintain marine biological diversity and explore underwater resources such as minerals for EV batteries.
Many of the underwater robots or their legs, however “These robots face great challenges in rough terrain, where obstacles and slopes can hinder their functions,” says Wang. They can also damage coral reefs.
The floating robots do not have this problem, but the current options disturb the sediments on the sea floor because their screaming creates a declining current while ascending. The result of the waves created when the fan fan struck directly to the sea floor in most floating robots, which leads to the movement of deposits in the vicinity directly. In a similar way to blow the dust in front of the digital or smartphone camera, the molecules that move through the water can block the vision of the cameras on the robot and reduce the quality of the images you take. “Treating this issue was very important to the functional success of our initial model and to increase its acceptance among engineers,” says Wang.
After more investigation, Wang and the rest of the team found that the robot shape affects the resistance of local water, or clouds, even at low speeds. “During the design process, we created a robot with two planes showing significant differences in water resistance,” says Wang. This led to the development of researchers a robot with a flat body and smoke fishing for the central axis. “We have found that the shape of the robot and the stiff planning greatly affects the speed of ascension,” says Wang.
Clockwise from the left: the relationship between the rotational speed of the heaviness, the resulting strength and torque in the coordinating structure system, the total structure of the robot, the side view of the arrangement of anxiety and the main electronics components.Wang gang, Kaxin Liu and others.
The researchers created a file system where defenses generate a common force that escapes down but still allows the robot to escalate, change the waking distribution during the climb so that the sediments are not disturbed on the sea floor. “The flatness of the robot and motifs for the central axis is a direct approach to most engineers, which enhances the possibility of a broader application of this design” in monitoring the sea floor.
“By treating navigational fears of floating robots, we aim to enhance the monitoring capabilities of the underwater robots in environments close to tourism,” says Wang. The car was tested in a group of marine environments,Including sandy areas, coral reefs, and severe rocks, to show their ability to disturb sediment in multiple possible environments.
Besides the developments of the structural design, the team merged control of the angular acceleration notes to keep the robot near the sea floor as much as possible without actually beating – called the bottom. They are also The algorithms of monitoring of the external disorder developed and designed the structure of the sensor planning that enables the robot to identify quickly and resist external disturbances, as well as drawing the path in the actual time. This approach allowed the new car to travel at a speed of only 20 cm over the sea floor without getting out of the bottom.
By planting this control, the robot managed to approach the sea floor and improve the quality of the images that you took by reducing light refraction and dispersion caused by the water column. “Given the proximity of the robot to the sea floor, short instability can lead to a collision with the bottom, and we have been fulfilled that the robot shows excellent resistance to strong disorders,” says Wang.
With the success of this new robot, which achieved a closer approach at the sea floor without disturbing the sea floor or breakdown, Wang stated that they are planning to use the robot to closely monitor the coral reefs. Monitoring coral reefs currently depends on the ineffective handicrafts, so that robots can expand observed areas, and do so more quickly.
“Effective detection methods lack the deeper water, especially in the middle -layer light. We plan to improve the independence of the detection process to replace divers in collection of images, facilitate automatic identification and classify the density of coral reefs to provide more accurate and timely reactions to the health condition of coral reefs,” Wang adds.
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