Soft aquatic robot using shape memory actuators based on an octopus jellyfish to improve water quality in aquariums

Abstract:
In this study, an octopus jellyfish-shaped robot is being developed to solve problems in aquarium water filtration. The robot collects suspended solids in the aquarium and supports the filtration process. It consists of a bell and a control box, and utilizes a shape memory alloy actuator to drive the bell. The robot mimics the ecology of an octopus jellyfish, and the filter is mounted under the bell. The filter utilizes the water flow generated when the bell closes to capture suspended solids and help improve the quality of the water in the tank. Previous robots have been able to operate in water, but have not been able to collect suspended solids. The bell part of the robot has been improved, and its ability to collect suspended solids has been verified. The results suggest that the robot can collect suspended solids in the aquarium and has a high potential to improve the water quality of the aquarium.