Skip to main content

Smellicopter is an autonomous, scent-chasing drone made with real moth antennas

There’s no doubt that 2020 has been a strange year. So strange, in fact, that the idea of an obstacle-dodging, autonomous cyborg drone that uses a real live moth antenna to track down smells doesn’t sound too much like weird science fiction. That’s probably a good thing, too, because it’s something that researchers from the University of Washington have actually built. And they’ve called it Smellicopter, because … why the heck not?

“The ability to detect and localize odors has a vast range of potential applications,” Thomas Daniel, a UW professor of biology, told Digital Trends. “Essentially, anywhere we might use dogs for tracking or sensing odors is a potential application for the Smellicopter. It has … the unique advantage that it flies and can navigate in complex environments. Moreover, it avoids putting dogs or humans in harm’s way. Everything from detecting gas leaks to disease outbreaks in crops to the volatiles emitted from [improvised explosive device] are potential areas of application.”

Biomimicry, the idea of using the natural world for engineering inspiration, is nothing new. But using bits of real animals is. As it turns out, however, moths are so unbelievably good at amplifying chemical signals with their antennae to detect even a single scent molecule that no human-made sensor can compete.

A team led by the University of Washington has developed Smellicopter: an autonomous drone that uses a live antenna from a moth (brown arc on top of the drone) to navigate toward smells. Mark Stone/University of Washington

Smell ya later

“We use actual moth antennae from live moths,” Melanie Anderson, a UW graduate student, told Digital Trends. “The moths are anesthetized before the antennae are removed, and they are frozen for future use for teaching and research. The antennae are basically liquid-filled, straw-like tubes, so we can insert small wires into either end of a single antenna to measure the electrical signal produced … when it smells an odor. Moth antennae are much more sensitive, consume less power, and weigh less than portable man-made odor sensors.”

Once it’s separated, the moth antenna remains biologically and chemically active for up to four hours. This could be extended by storing it in the fridge. Once connected to the drone, the antenna is able to have its signals read electronically. Aside from the sensor, the researchers also added a pair of plastic fins to the back of the drone to create drag to help it remain constantly oriented upwind. Its four infrared sensors allow it to detect what’s going on around it 10 times per second and dodge obstacles accordingly.

“While electroantennograms are not new and have been used to read the signals from antennae for many years, putting antennae on a drone to detect odors while flying is a novel idea,” Anderson said. “Moths are quite efficient at locating odors and rely on their ability to do so for food, as well as mates. To be able to mimic their flight on a platform we can control is very exciting.”

The Smellicopter research was recently published in the journal IOP Bioinspiration & Biomimetics.

Editors' Recommendations

Luke Dormehl
I'm a UK-based tech writer covering Cool Tech at Digital Trends. I've also written for Fast Company, Wired, the Guardian…
Sony’s first drone, the Airpeak S1, rockets to 55 mph in just 3.5 seconds
sony airpeak s1 drone news close

Sony has announced its first drone, the Airpeak S1, and it will out-accelerate the competition by rocketing to 50 miles per hour in just 3.5 seconds and on to a maximum speed of 55.9mph. That makes it the fastest accelerating drone in the industry. It’s not competing with small consumer drones like the DJI Mavic Air 2, however -- this is a large pro-level drone designed to carry a gimbal and a full-size camera, ready for commercial use in the skies. And it costs $9,000.

The Airpeak S1 has a 644mm total span, making it similar in size to the DJI Inspire 2 but far more capable in terms of payload and ability. It's the smallest drone that can carry a full-size mirrorless Sony Alpha camera equipped with interchangeable lenses. It uses five stereo cameras and two infrared cameras along with Sony’s new Vision Sensing Processor, and power is delivered using a new propulsion system using brushless motors, and an internal battery for a flight time of up to 22 minutes. Sony promises excellent stability during windy conditions too, stating it will remain steady even when wind speed reaches 44mph or 20 meters per second.

Read more
Watch this spectacular light show using a record number of drones
watch this awesome light show using record number of drones genesis drone

More and more events are swapping out fireworks for drones for spectacular shows that light up the night sky.

Such shows are growing more ambitious, too, with a recent one in Shanghai, China, setting a new world record for the number of drones used.

Read more
Why engineers are studying dragonflies to build the next generation of drones
dragonfly inspired robot common darter 1  lin lab

Various dragonfly drops Lin Lab

Nature is a consummate problem-solver. After all, it’s had billions of years of evolutionary iteration to figure out (in a roundabout way) what works and what doesn’t. For that reason, researchers frequently look at the natural world for answers -- even when they’re solving a problem that, technologically, might be pretty new.

Read more