Smartphone Sensor System Tracks Gunfire

Engineers from Vanderbilt University have developed an inexpensive hardware module and related software that can transform an Android smartphone into a simple shooter location system. They described the new system’s capabilities this month at the 12th Association for Computing Machinery/Institute of Electrical and Electronics Engineers Conference on Information Processing in Sensor Networks in Philadelphia.


(Smartphone-based system for identifying gunshot location)

First, there is the muzzle blast – an expanding balloon of sound that spreads out from the muzzle each time the rifle is fired. Second, bullets travel at supersonic velocities so they produce distinctive shockwaves as they travel. As a result, a system that combines an array of sensitive microphones, a precise clock and an off-the-shelf microprocessor can detect these signatures and use them to pinpoint the location from which a shot is fired with remarkable accuracy.

In addition to the smartphone, the system consists of an external sensor module about the size of a deck of cards that contains the microphones and the processing capability required to detect the acoustic signature of gunshots, log their time and send that information to the smartphone by a Bluetooth connection. The smartphones then transmit that information to the other modules, allowing them to obtain the origin of the gunshot by triangulation.

The researchers have developed two versions. One uses a single microphone per module. It uses both the muzzle blast and shockwave to determine the shooter location. It requires six modules to obtain accurate locations. The second version uses a slightly larger module with four microphones and relies solely on the shockwave. It requires only two modules to accurately detect the direction a shot comes from, however, it only provides a rough estimate of the range.

Greg Bear uses this idea in his 2007 novel Quantico; see the entry for weapon sound tracker (this entry contains a part of an interview I conducted with Bear about his book):

Sound trackers on the roof could zero in on weapons action and coordinate return fire through UAVs and their only other air support, the Superhawk.

Via Vanderbilt University News.

Scroll down for more stories in the same category. (Story submitted 4/27/2013)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 1 )

Related News Stories - (" Surveillance ")

Adversarial Pattern Shirts Confound Object Detection Systems
Ah, to be a vague blur!

A Passing Drone Has Covid-19 Advice
'Gold dots against blue, basketball-sized, twelve feet up.' Larry Niven, 1972.

Drones Used To Smuggle Contraband Into Prison
'And some mega chip inside so it never runs into anything and no cop ever sees it.' - Bruce Sterling, 1994.

DARPA's Subterranean Challenge
Let the machines explore the underground city!

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

 

Current News

Sci-Fi Helps Young Readers Build Resiliency
'Reading science fiction and fantasy can help readers make sense of the world.'

I Want My 1928 Telestereo Hologram Now
'Instantly there appeared standing upon the disk, the image of a man...'

Memes Now Come From Neural Nets
'Your order said for him to be able to be able to work out twists on the gags in the file...'

Robot Dog Learns To Be Doggy From Real Dogs
'So we took pictures of Guzub making a Three Planets, and I could construct this one to do it exactly right down to the thousandth of a second.'

Unwanted Cruise Ships Huddle Together Out At Sea
'On the screen they passed in an endless, boundaryless flood of green specks...'

Sono Sion Electric Car Charges As You Drive
'It drew its power from six square yards of sunpower screens on its low curved roof.'

News Mood Filter Web Extension
'He adjusted the n, the r and b knobs, and hopefully anticipated a turn for the better...'

Fetal Lamb Rests In Artificial Womb
'... stewing warm on their cushion of peritoneum and gorged with blood-surrogate and hormones, the foetuses grew and grew...'

MIT Wants To Catch Interstellar Visitors
'INVESTIGATE MYSTERIOUS OBJECT ENTERING NEW CALEDONIA SYSTEM FROM NORMAL SPACE'

AutoX Sets Up Asia's Largest Robotaxi Center
'The robot cab seemed to know where it was going and, no doubt, the master machine from which it received its signals knew.'

E - Ink's Automatic Self Styling Color-Changing Dress
'The racks of gowns itched and quivered, their colors running into blurred pools.'

Soft Robots Use Kirigami Piezoelectric Sensor Skin
'A worthy opponent was the golem.'

Bosch Smartglasses Laser Paints AR Image On Your Retina
'Soon we'll be testing a system that projects directly on the retina of the eye.'

Maybe We Could Hibernate Until The Covid-19 Pandemic's End
'Cold-rest was a common last resort therapy for functional psychoses.'

Workplace Monitoring Hell, I Mean, Tool For Safe Distancing
'And here is the weirdest part -- I never see another employee the entire day.'

Patent Office Says AIs Cannot Be Inventors
'The real smart ones are as smart as the Turing heat is willing to let 'em get.'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.