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Gizmorama - MIT researchers unveil perching bee robot
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Gizmorama - May 25, 2016
Drones won't be the only airborne electronic device. MIT is buzzing about their bee robot.
Learn about this and more interesting stories from the scientific community in today's issue.
Until Next Time,
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*-- MIT researchers unveil perching bee robot --*
BOSTON - Engineers at MIT and Harvard have designed a tiny bee-like robot capable of pausing mid-flight to perch on a variety of objects before once again taking to the air. The robot uses static electricity to momentarily cling to the underside of objects.
Robots designed for aerial surveys and related observational tasks, like quadcopters, are currently limited by short flight times. They tend to run out of battery rather quickly. While perching won't extend a drone's actual time in the air, the technology could empower UAVs to employ their power more strategically -- periodically taking a moment to rest their wings, or blades.
Researchers tested their technology on RoboBee, a bug-like flying robot no bigger than a quarter. A small jolt of static electricity emitted through a tiny foam patch on the bee's head allows it to land on and adhere to the underside of a plant or to the ceiling.
The technology is in its infancy, and a number of kinks still need to be worked out. It's easily thrown out of whack by disturbances in the air. And currently, it relies on external camera sensors to guide its flight. Eventually, scientists hope to integrate internal control mechanisms and scale up the RoboBee's size so it's more stable.
Scientists believe the RoboBee's perching ability could eventually improve the performance of robots used in search and rescue missions -- or "basically any situation where you want to have low cost and distributed sensing [that] would be too difficult or too dangerous for a human," researcher Robert Wood told Mashable.
Wood is the co-author of a new paper on the technology, published this week in the journal Science.
Researcher Mirko Kovac wrote an essay accompaniment to the study. In it, he detailed the possibilities enabled by the land-and-attach technology.
"Perching onto structures can save energy and maintain a high, stable observation or resting position," Kovac wrote.
Kovac thinks the next step is to incorporate renewable energy sources, like small solar cells, so a miniature drone could recharge as it rests.
*-- Study: Epoxy makes transparent wood stronger than glass --*
COLLEGE PARK, Md. - Materials scientists are giving wood a makeover. Last month, they made it transparent. Most recently, researchers made wood stronger than glass by adding epoxy.
In April, researchers in Sweden revealed a process for removing lignin, the part of the cell wall that gives wood its color. The scientists turned blocks of wood transparent by boiling them for two hours in a concoction of water, sodium hydroxide and several other chemicals.
Scientists at the University of Maryland built on the Swedish researchers' work, using the same color-removing process before adding their own twist -- pouring epoxy over the transparent wood block.
The simple additive process made the block four to six times stronger -- stronger than glass.
Researchers believe the new material could be used to make more resilient windows and other optical materials, like solar panels. While its transparency resembles glass, its structure is much different. The clear wood features design elements leftover from its life as a tree -- vascular structures that once carried water and nutrients up and down a tree's trunk and branches.
This piping helps channel light passing through the wood.
"In traditional material the light gets scattered," Liangbing Hu, a materials scientist at Maryland, told The New York Times. "If you have this waveguide effect with wood, more light comes into your house."
Hu and his colleagues -- who detailed their latest efforts in the journal Advanced Materials -- are now working on strategies for scaling up their production process, with the hopes of making larger blocks of transparent, epoxied wood.
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