Pushpam-tech

A Robot Turtle Will Help Underwater Archaeologists to Inspect Shipwrecks

U-CAT's locomotion principle is similar to sea turtles. Independently driven four flippers make the robot highly maneuverable; it can swim forward and backward, up and down and turn on spot in all directions. Maneuverability is a desirable feature when inspecting confined spaces such as shipwrecks. The robot carries an onboard camera and the video footage can be later used to reconstruct the underwater site.
"U-CAT is specifically designed to meet the end-user requirements. Conventional underwater robots use propellers for locomotion. Fin propulsors of U-CAT can drive the robot in all directions without disturbing water and beating up silt from the bottom, which would decrease visibility inside the shipwreck," says Taavi Salumäe, the designer of the U-CAT concept and researcher in Centre for Biorobotics, Tallinn University of Technology.
"The so called biomimetic robots, robots based on animals and plants, is an increasing trend in robotics where we try to overcome the technological bottlenecks by looking at alternative technical solutions provided by nature ," explains Prof. Maarja Kruusmaa, a Head of Centre for Biorobotics.
Underwater robots are nowadays mostly exploited in oil and gas industry and in defense. These robots are too big and also too expensive to be used for diving inside wrecks. Shipwrecks are currently explored by divers, but this is an expensive and time consuming procedure and often too dangerous for the divers to undertake. U-CAT is designed with the purpose of offering an affordable alternative to human divers.
U-CAT is part of an EU funded research project ARROWS, which is developing technologies to assist underwater archaeologists. The technologies of the ARROWS project will be tested in the Mediterranean Sea and in the Baltic Sea, two historically important but environmentally different regions of Europe. "In the ARROWS project, the U-CATs would work in cooperation with larger underwater robots and together with image recognition technologies for discovery, identification and reconstruction of underwater sites, would facilitate the work in all phases of an archaeological campaign," says Dr. Sebastiano Tusa, an underwater archaeologist from Sicilian Regional Government.
In London Science Museum, the team will show the U-CAT robot as well as its interactive downscaled models u-CATs operating in an aquarium. Robot Safari is open for visitors from 28 November to 1 December.

Send wireless power long range with lasers and balloons

WHO needs wires? An idea for sending power over long distances via lasers and balloonsMovie Camera could help provide emergency power where it is needed. Stephen Blank of the New York Institute of Technology wants to use aerostats, military-grade balloons, to send hundreds of kilowatts of power over several hundred kilometres. A laser would be sent up to the aerostat through a fibre-optic cable, then beamed through the air to a distant aerostat where the high-energy light is converted into electricity, which streams back down to earth via a tether.

Getting energy into disaster zones could be one of the first uses, says Blank, pointing to the aftermath of typhoon Haiyan in the Philippines. "You could have an aircraft carrier off the coast of the Philippines, with its nuclear generator, beaming power where it's needed," says Blank, who is to present the concept at an aerospace conference in March next year.

The ultimate goal is space-based solar power, beamed to Earth via lasers from orbit. This research is at its most advanced in Japan, says Reza Zekavat of Michigan Technological University. A $21 billion Japanese project aims to put 1 gigawatt of solar generation capacity in space within the next 30 years.