A device that can detect an "unmanned aircraft flying over the sky"

Washington D.C.On April 30 (US time), an ambitious aircraft engineer, John Franklin, has launched a campaign to fund the "open source unmanned spacecraft (drone) detection system" on "Indiegogo".

This system is called "DRONE SHIELD", and is already known by scanning a specific sound crest (Audio Signature) by combining "Raspberry Pi" (Japanese version) with a signal processor, microphone, and analysis software.It is compared to the sound of drones.

For example, the U.S. Air Force's mid -high and long -term and long -term unmanned -term industrial system "Predator" makes a very different sound from a small quad helicopter.When a matching sound is found, Drone Shield sends an email or short message to the owner.

Franklin told our interview that the system is based on multiple documents that are publicly available.For example, the ACOUSTIC FEATURE EXTRACTION FORA NEURAL Network Classifier, which was published in the US Army Research Institute (ARL) in 1997, includes the acoustic feature extraction for identification: PDF files.

Franklin thought that it would cost $ 60 to 70 to reach one DRONE SHIELD, but that citizens who care about Privacy would pay for them.Franklin explains that he came up with this because he was not only in foreign conflict zones, but also in the situation where drones were increasing in the United States as well.

Franklin had estimated that it would be enough to have the cost of about $ 100 and two months to determine if the idea would work.There are other tactics and devices for drone measures, but nothing is as cheap as DRONE SHIELD.But that's a story if it works as the singing complaint.Some experts are not convinced of this idea.

Professor Chris Killy Kakis, who taught electrical engineering at the University of Southern California and has expertise in acoustic signal processing, says, "It will be possible in theory.""But there are many problems that need to be solved to make it happen. It's not clear whether one microphone is enough. In most cases, you'll need a microphone layer (group). Another big problem.There are various types of feature extraction methods that theoretically well, but I have never seen an additional or mixed noise.

Franklin acknowledges that his device is not 100 %, but hopes that technological development will be advanced by opening the system.

* The target deadline has been 17 days at the time of translation, but it has already collected $ 8,499 for the target of $ 3,500.

TEXT by PHILIPPA WARR

Image by Drone Shield

Translation by miho amano/galileo