Skip to main content

This sensor stops your quadcopter before it can cut you

The folks at Spectrum have found a truly cool project for quadcopter pilots. It’s a spinning sensor that will stop the rotors if your finger gets too close to the blades, thereby preventing you – or your kids – from getting cut.

Researchers at the University of Queensland in Brisbane, Australia created so-called Safety Rotor to help prevent accidents with more powerful quadrotor drones. The system constantly senses for a “finger” – in this case a hot dog – and then slams the rotor to a stop within 0.077 seconds. A cage around the propellers spins more slowly than the propellers and is constantly on the lookout for biological material approaching the blades.

The measured latency [of the Safety Rotor’s braking response] was 0.0118 seconds from the triggering event to start of rotor deceleration. The rotor required a further 0.0474 s to come to a complete stop. Ninety percent of the rotational kinetic energy of the rotor (as computed from angular velocity) was dissipated within 0.0216 s of triggering, and 99 percent of the rotational kinetic energy of the rotor was dissipated within 0.032 s.

The safety functionality of the safety system was tested on the bench using a processed meat “finger” proxy to trigger the hoop, and also applied to an open rotor (without hoop) for comparison. The rotor was spun at hover speed (1100 rads−1) and the finger proxy was introduced into the hoop at 0.36 ms−1 … The rotor and finger motion were captured using a shutter speed of 480 Hz. The rotor came to a stop within 0.077 s, with only light marks on the finger proxy from the impact of the hoop. The rotor was completely stopped by the time the finger reached the rotor plane. In contrast, the tip of the finger proxy introduced to an open rotor was completely destroyed.

The kit adds $20 and about 22 grams to the drone so it’s not particularly expensive or difficult to implement. It could be, as they note, a real lifesaver if you tend to put your juicy, blood-filled digits into copter blades.



from Gadgets – TechCrunch https://ift.tt/2L1joZj
Labels:

Comments

Post a Comment

Popular posts from this blog

The future of Magic Leap's promising AR efforts dim after layoffs

The Magic Leap Two is now further away than ever, unfortunately. Today in a blog post the augmented reality pioneer announced major layoffs and has decided to cut up to half of its workforce, according to some reports. The original Magic Leap One was supposed to be one of the first mainstream augmented reality headsets when it launched in 2018, but a high price point and lack of interest from developers left the headset high and dry after launch. According to the blog post, Magic Leap says it will be focusing its efforts on enterprise solutions (a statement HTC has made recently as well) and shift its focus away from consumer technology… at least for the time being.  The company has been open about creating a second headset that would offer improved specs for some time, but how that work will now have to go forward without half of the team , according to some estimates, remains to be seen. Is the window closing on augmented reality?  Although it’s just one company, Magic...
Post a Comment
Read more

Airship acquires SMS commerce company ReplyBuy

Airship is announcing that it has acquired mobile commerce startup ReplyBuy . The startup (which was a finalist at TechCrunch’s 1st and Future competition in 2016) works with customers like entertainment venues and professional and college sports teams to send messages and sell tickets to fans via SMS. It raised $4 million in funding from Sand Hill Angels, Kosinski Ventures, SEAG Ventures, Enspire Capital, MRTNZ Ventures and others, according to Crunchbase . Airship, meanwhile, has been expanding its platform beyond push notifications to cover customer communication across SMS, email, mobile wallets and more. But CEO Brett Caine said this is the first time the company is moving into commerce. While sports and concerts tickets might not be a booming market right now, Caine suggested that the company is actually seeing increased purchasing activity “in and around the Airship platform” as businesses try to drive more in-app purchases. He also suggested that both the COVID-19 pandem...
Post a Comment
Read more