SoFi, a underwater robotic fish

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With a Greenland shark finally held on video for a really initial time, scientists and engineers are deliberating a stipulations of stream sea monitoring technology. One poignant allege comes from the CSAIL group during Massachusetts Institute of Technology (MIT): SoFi, a robotic fish.

The untethered SoFi robot

Last week, a Computer Science and Artificial Intelligence Laboratory (CSAIL) group during MIT denounced SoFi, “a soothing robotic fish that can exclusively float alongside genuine fish in a ocean.”

MIT CSAIL underwater fish SoFi regulating Raspberry Pi

Directed by a Super Nintendo controller and acoustic signals, SoFi can dive untethered to a limit of 18 feet for a sum of 40 minutes. A Raspberry Pi receives submit from a controller and amplifies a ultrasound signals for SoFi around a HiFiBerry. The controller, Raspberry Pi, and HiFiBerry are hermetic within a waterproof, cast-moulded silicone surface filled with non-conductive vegetable oil, permitting for underwater equalisation.

MIT CSAIL underwater fish SoFi regulating Raspberry Pi

The ultrasound signals, perceived by a modem within SoFi’s head, control all from direction, tail oscillation, pitch, and abyss to a onboard camera.

As explained on MIT’s news blog, “to make a drudge swim, a engine pumps H2O into dual balloon-like chambers in a fish’s tail that work like a set of pistons in an engine. As one cover expands, it bends and flexes to one side; when a actuators pull H2O to a other channel, that one bends and flexes in a other direction.”

MIT CSAIL underwater fish SoFi regulating Raspberry Pi

Ocean exploration

While we’ve seen many autonomous underwater vehicles (AUVs) regulating onboard Raspberry Pis, SoFi’s ability to ramble untethered with a wireless waterproof controller is an sparkling achievement.

“To a knowledge, this is a initial robotic fish that can float untethered in 3 measure for extended durations of time. We are vehement about a probability of being means to use a complement like this to get closer to sea life than humans can get on their own.” – CSAIL PhD claimant Robert Katzschmann

As a MIT news post notes, SoFi’s simple, lightweight setup of a singular camera, a motor, and a smartphone lithium polymer battery set it detached it from existent massive AUVs that need vast motors or support from boats.

For some-more in-depth information on SoFi and a onboard tech that controls it, find a CSAIL team’s paper here.

Source: Raspberry Pi blog, created by Alex Bate.

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