meet \'sofi\', the robo-fish that can swim alongside marine life 50 feet below the surface without being noticed

by:Keyuan     2020-06-21
According to a new report, a robotic fish may be able to unlock the secrets of marine life that researchers have difficulty approaching.
Scientists from the Massachusetts Institute of TechnologyMIT)
A robot fish called SoFi was created and tested in Fiji.
SoFi is able to swim more than 50 feet m downstream of the water and can swim for 40 minutes without interruption.
Researchers of the new study, published in scientific robotics, say robotic fish technology can help scientists learn more about creatures that humans cannot study.
Scroll down to view video sofi tested by Rainbow Reef Fiji, which can handle oncoming water flow and get high
Resolution photo when swimming, it uses fisheye lens.
\"Using its undulating tail and its unique ability to control its own buoyancy, SoFi can swim straight, turn, or dive up and down,\" the study said.
The team also used the waterproof Super Nintendo controller and developed a custom acoustic communication system that enabled them to change the speed of the SoFi and allow it to make specific moves and turns.
Soft robots can swim next to real fish, the report says, which is good for researchers.
According to MIT scientist Robert catzheman: as far as we know, this is the first robot fish that can swim in 3D space for a long time without restraint.
\"We are excited about the possibility of being able to use such a system closer to marine life than humans themselves.
The alternating action of the robot will produce a rolloverto-
Imitate the side movements of real fish.
By changing its flow mode, the hydraulic system can achieve different tail movements, resulting in a series of swimming speeds, with an average of about half a body length per second, the study said.
The second half of the robot consists of flexible plastic and silicone rubber, and many parts of SoFi are 3D printed.
In these sections, there is a head that wraps all the electronics of the fish.
The researchers filled the head of SoFi with baby oil to reduce the possibility of water damaging the machine.
The study explained that they chose baby oil because it is a liquid that does not compress due to pressure changes during diving.
Cecilia Laschi, professor of Biosophy, said: \"The author has demonstrated some technical achievements in manufacturing, power supply and waterproofing that allow robots to move underwater without tether
Robots like this can explore coral reefs more closely than today\'s robots, both because it can approach coral reefs more safely and because it can be better accepted by marine species.
According to the report, one of the most challenging obstacles for researchers is to let SoFi move in different depths.
SoFi has two fins for adjusting the height of the fish when diving up and down.
The report explains that in order to adjust its position vertically, the robot has an adjustable weight compartment and a \"buoyancy control unit\" that can change its density by compressing and decompressing the air.
The goal of SoFi is to minimize the damage of the fish as much as possible, and the researchers strive to keep its movement as quiet as possible.
Daniel La Ruth, a professor at MIT, said: \"robots are able to observe and interact closely with marine life and do not seem to interfere with real fish.
Avoiding Collisions usually results in low motion efficiency because robots have to adapt to collisions --Free track.
Not only is it more likely that the soft robot will survive the collision, it can also be used as information to provide information for a more effective motion plan next time.
\"Researchers will now work on improving SoFi, especially on how to help robots swim faster and improve tail and body design.
Professor Ross said: \"We think SoFi is the first step in developing the underwater observatory.
It has the potential to become a new tool for Ocean Exploration and open up new ways to uncover the mysteries of marine life.
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