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 ")

Zephyr Solar-Electric Stratospheric Drone
'The planes flew continuously, twenty-four hours a day...' - EB White, 1950.

Robot Hummingbird Hovers Biomimetically
'With a buzz... it started out on its journey.' - Raymond Z. Gallun, 1936.

Capitalist Big Brother Co-Opts Regular Big Brother
'It was even conceivable that they watched everybody all the time.' - George Orwell, 1948.

Juggalo Face Paint Disrupts Facial Recognition
'... designed to foil facial recognition systems.' - Neal Stephenson, 2019

 

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

Extremophile Microbe Loves Space Rocks
'... designed for rooting in the metal make-up of the asteroids for vital elements.'

Magic Mushroom Nose Spray From Silo Wellness
'I don't need help... that's not my diagnosis!'

CAV-X Supercavitating Ammo Deadly Underwater
'...in the midst of this fluid, which is very dense compared with the atmosphere, shots could not go far.'

Space Domes Over-rated? Science Fiction Authors Have Answers
'This was to be roofed over, sealed, and an atmosphere provided...'

Injectable Magnetic Fluid Slows Bleeding, Aids Magneto
'There's something different about you.'

Autonomous Wheelchairs Improve Airport Mobility
'Noiselessly, on rubber-tired wheels, they journeyed down the long aisles...'

HVSD, Kitty Hawk's Electric Plane
Very quiet commuter plane offers VTOL service.

Frictionless Toilet Could Save 140 Billion Liters Of Water
'The bowl was a frictionless surface...'

Viisights AI Hones Video Surveillance
'The math boys worked it out...'

Cybertruck The Solar-Powered Steel Tortoise
'It drew its power from... sunpower screens on its low curved roof.'

Road Noise Charges Electric Cars With Peugeot Piezoelectric Billboard
''... major cities of Earth have free electrical power conveniently processed from their own noise.'

Unsinkable Metal Latest Gates Obsession
'A metal... light as cork.'

M-Blocks 2.0 Self-Assembling Robots
'Faster the cubes moved...'

NASA 'Broomstick' Recalls SciFi Ideas
'The appearance was enough like a giant witch's broom to justify the nickname.'

Orbital Display's Low Earth Orbit Advertisements
'A vast circle of scarlet stars came up into the greenish desert dusk.'

Neuromorphic Computing Hardare
'He had constructed an organ, a brain, of metal, entirely inorganic and lifeless...'

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.