drone

372 Articles

Patent Spat Leaves DJI Owing Textron $279M

May 1, 2023 by 46 Comments

Patents are the murky waters where technical jargon and legalese meet, and in this vast grey area of interpretation, DJI now owes Textron $279M.

At issue in the case were two patents issued to Textron (#8,014,909 and #9,162,752) regarding aircraft control systems for relative positioning to other vehicles and automatic hovering. The jury found that Textron’s intellectual property (IP) had been infringed and that damages amounted to $279M. DJI asserts that Textron’s patents are not valid and will appeal the decision. Appeals in patent trials are handled by the Federal Circuit and can be kicked up to the US Supreme Court, so don’t expect a final decision in the case anytime soon.

We’re not lawyers, so we won’t comment on the merits of the case, but, while it was a jury trial, it was one of many cases decided in the court of Judge Alan Albright, who has been the focus of scrutiny despite efforts to assign fewer cases to his docket amid wider efforts to stymie venue shopping in patent cases. Despite these efforts, the Western District of Texas is such a popular venue for patent cases that Berkeley offers a CEU on going to trial in Waco.

If you’re curious about more IP shenanigans, checkout the Honda mass takedown, the legality of making something similar, or why E3D patents some of their work.

Is An ADS-B Receiver The Solution For Drone Pilots?

April 27, 2023 by 45 Comments

Over the years here at Hackaday, we’ve covered a range of stories about the ongoing panic surrounding drone flights. From plastic bags reported as drone incidents through to airports closed with no evidence of drones being involved, it’s clear that drone fliers are an embattled group facing a legal and aeronautical establishment that seems to understand little about them or their craft.

It sometimes seems to be a no-win situation for fliers, but perhaps [XJet] has something which might improve matters. He’s published a video showing off a portable ADS-B receiver which could be used by drone pilots to check for any aircraft in the vicinity and perhaps more importantly allow the drone community to take the moral high ground when problems occur.

The receiver isn’t particularly special, being a Raspberry Pi with LCD screen and an RTL-SDR receiver in a nice 3D printed enclosure. He says he’ll be publishing all software and build details in due course. But it’s the accessibility which makes it such a good idea, instead of being a very expensive safety device it’s a receiver that could probably be made with a less powerful Pi for under $100.

There is of course a flaw in the plan, that not all pilots are concerned enough for their safety to fit an ADS-B transponder to their aircraft, and so are invisible to both the thus-equipped drone pilot and air traffic control alike. This puts the onus on pilots to consider ADS-B an essential, but from the drone flier’s point of view we’d consider that a spotter should be part of their group anyway.

Curious what the fuss is about? Let us take you on a journey.

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That Drone Up In The Sky? It Might Be Built Out Of A Dead Bird

April 19, 2023 by 40 Comments

In a lot of ways, it seems like we’re in the “plateau of productivity” part of the hype cycle when it comes to drones. UAVs have pretty much been reduced to practice and have become mostly an off-the-shelf purchase these days, with a dwindling number of experimenters pushing the envelope with custom builds, like building drones out of dead birds.

These ornithopomorphic UAVs come to us from the New Mexico Insitute of Mining and Technology, where [Mostafa Hassanalian] runs the Autonomous Flight and Aquatic Systems lab. While looking into biomimetics, [Dr. Hassanalian] hit upon the idea of using taxidermy birds as an airframe for drones. He and his team essentially reverse-engineered the birds to figure out how much payload they’d be able to handle, and added back the necessary components to make them fly again.

From the brief video in the tweet embedded below, it’s clear that they’ve come up with a huge variety of feathered drones. Some are clearly intended for testing the aerodynamics of taxidermy wings in makeshift wind tunnels, while others are designed to actually fly. Propulsion seems to run the gamut from bird-shaped RC airplanes with a propeller mounted in the beak to true ornithopters. Some of the drones clearly have a conventional fuselage with feathers added, which makes sense for testing various subsystems, like wings and tails.

It’s easy to mock something like this, and the jokes practically write themselves. But when you think about it, the argument for a flying bird-shaped robot is pretty easy to make from an animal behavior standpoint. If you want to study how birds up close while they’re flying, what better way than to send in a robot that looks similar to the other members of the flock? And besides, evolution figured out avian flight about 150 million years ago, so studying how birds do it is probably going to teach us something.

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Cheap Camera Gives Clay-Pigeon’s-Eye View Of Trap Shooting

March 14, 2023 by 23 Comments

Speaking from experience, it’s always fun to build something with the specific intention of destroying it. Childhood sessions spending hours building boats from scrap wood only to take them to a nearby creek to bombard them with rocks — we disrespectfully called this game “Pearl Harbor” — confirms this. As does the slightly more grown-up pursuit of building this one-time-use clay pigeon camera.

The backstory on this build, which dates all the way back to 2017, is that [Thomas] was invited to a birthday bash at the local shooting range for a round of trap shooting. For the uninitiated, trap is a sport that involves launching a clay disc (known as a pigeon) into the air as a moving target and shooting it down with a shotgun. It’s a lot of fun, but [Thomas] was looking for a way to make it even more fun.

After toying with the idea of buying a cheap drone for aerial target practice, he settled on the idea of making a clay pigeon camera. After procuring a cheap keychain camera, he designed a simple wind vane mount for the camera, to keep it pointed in one direction rather than spinning with the pigeon. The wind vane was 3D printed and attached to the pigeon with a skate bearing, and the rig was ready for the range. The snuff film below tells the whole tale; the camera performed admirably and the wind vane did a good job of steadying the camera for all of about five seconds, until the inevitable and dramatic demise of the pigeon.

Watching this makes us feel like we need more projects designed for intentional destruction. Safety first, of course, but we’d be keen to see what everyone comes up with.

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Stranded Motorist Effects Own Rescue Using A Drone And A Cell Phone

March 8, 2023 by 79 Comments

If you’re looking for a good excuse to finally buy a drone, you probably can’t do better than claiming it can save your life.

Granted, you may never find yourself in the position of being stuck in a raging snowstorm in the middle of the Oregon wilderness, but if you do, this is a good one to keep in mind. According to news stories and the Lane County Sheriff Search and Rescue Facebook page, an unnamed motorist who was trying to negotiate an unmaintained road through the remote Willamette National Forest got stuck in the snow. This put him in a bad situation, because not only was he out of cell range, but nobody knew where he was or even that he was traveling, so he wouldn’t be missed for days.

Thankfully, the unlucky motorist played all his cards right. Rather than wandering off on foot in search of help, he stayed with his vehicle, which provided shelter from the elements. Conveniently, he also happened to have a drone along with him, which provided him with an opportunity to get some help. After typing a detailed text message to a friend describing his situation and exact location, he attached the phone to his drone and sent it straight up a couple of hundred feet — enough to get a line-of-sight connection to a cell tower. Note that the image above is a reenactment by the Search and Rescue team; it’s not clear how the resourceful motorist rigged up the drone, but we’re going to guess duct tape was involved.

When he brought the drone back down a few minutes later, he found that the queued text had been sent, and the cavalry was on the way. The Search and Rescue unit was able to locate him, and as a bonus, also found someone else nearby who had been stranded for days. So it was a win all around thanks to some clever thinking and a little technology.

Bicopter Phone Case Might Be Hard To Pocket, But Delivers Autonomous Selfies

February 10, 2023 by 8 Comments

Remember that “PhoneDrone” scam from a while back? With two tiny motors and props that could barely lift a microdrone, it was pretty clearly a fake, but that doesn’t mean it wasn’t a pretty good idea. Good enough, in fact, that [Nick Rehm] came up with his own version of the flying phone case, which actually works pretty well.

In the debunking collaboration between [Mark Rober], [Peter Sripol], and the indispensable [Captain Disillusion], you’ll no doubt recall that after showing that the original video was just a CGI scam, they went on to build exactly what the video purported to do. But alas, the flying phone they came up with was manually controlled. While cool enough, [Nick Rehm], creator of dRehmFlight, can’t see such a thing without wanting to make it autonomous.

To that end, [Nick] came up with the DroneCase — a bicopter design that allows the phone to hang vertically. The two rotors are on a common axis and can swivel back and forth under control of two separate micro-servos; the combination of tilt rotors and differential thrust gives the craft full aerodynamic control. A modified version of dRehmFlight runs on a Teensy, while an IMU, a lidar module, and a PX4 optical flow sensor round out the sensor suite. The lidar and flow sensor both point down; the lidar is used to sense altitude, while the flow sensor, which is basically just the guts from an optical mouse, watches for translation in the X- and Y-axes.

After a substantial amount of tuning and tweaking, the DroneCase was ready for field tests. Check out the video below for the results. It’s actually quite stable, at least as long as the batteries last. It may not be as flexible as a legit drone, but then again it probably costs a lot less, and does the one thing it does quite well without any inputs from the user. Seems like a solid win to us.

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Flappy Bird Drone Edition

January 16, 2023 by 18 Comments

Ornithopters have been — mostly — the realm of science fiction. However, a paper in Advanced Intelligent Systems by researchers at Lund University proposes that flapping wings may well power the drones of the future. The wing even has mock feathers.

Birds, after all, do a great job of flying, and researchers think that part of it is because birds fold their wings during the upstroke. Mimicking this action in a robot wing has advantages. For example, changing the angle of a flapping wing can help a bird or a drone fly more slowly.

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