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Friday, July 17, 2020

July 17, 2020
Bugging a room just got a little more literal with these tiny cameras that attach to beetles and capture what they see
Mark Stone/University of Washington

A tiny camera that hitches a ride on the backs of beetles can wirelessly live-stream footage from a bug’s eye view.

Shyam Gollakota and his colleagues at the University of Washington in Seattle have developed a small, steerable camera that can be fixed to beetles to transmit footage from their surroundings in real time.

The camera uses Bluetooth to send footage to a smartphone at a resolution of 160 by 120 pixels, and at a rate of between one and five frames per second. It sits on a mechanical arm that can be remotely controlled to pivot the camera left and right.

Capturing footage while beetles move has a power-saving advantage over insect-like robots or drones, says Gollakota. “That mobility really drains the battery a lot,” he says.

“By combining these two different things – living animals with sensors – you’re basically getting the best of both worlds,” says Gollakota.
The tiny cameras are fixed to the back of beetles and can be removed Mark Stone/University of Washington
The camera is powered by a lithium polymer battery. When streaming continuously, it can run for over an hour, says Vikram Iyer, also at the University of Washington. The device also includes an accelerometer; the camera can be programmed to only capture footage when the beetle is moving – in this case, the battery lasts for up to 6 hours.

The device weighs just over half a gram and can be removed from the beetles.

The researchers attached the backpack to two different species, the death-feigning beetle (Asbolus laevis) and the pinacate beetle (Eleodes nigrina), which are known to be able to carry loads of a similar weight. They say the beetles lived for more than a year after the experiment ended.
In their current system, the team has no control over where the beetles move. However, using tens or hundreds of beetles would enable more comprehensive monitoring or mapping of an environment, says Gollakota. “As they spread out you can collect enough information that you don’t need to control the insects, he says.
Journal reference: Science Robotics, DOI: 10.1126/scirobotics.abb0839

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