See People Through Walls

An innovative system created at MIT will let you see people through concrete walls. The device is an ultrawideband (UWB) multiple-input, multiple-output phased-array sensor with real-time acquisition and processing capability; it provides video-like synthetic aperture radar (SAR) images of people moving behind a concrete wall.

At the core of the system is a range-gated continuous-wave radar architecture that provides dynamic range and sensitivity to acquire weak signals scattered from targets behind the wall. The radar set is connected to an array of UWB antenna elements consisting of two subarrays made up of 8 receive elements and 13 transmit elements. Microwave switches guide the transmitter port from the radar to one transmit element at a time. Similarly, microwave switches guide the receive port to one receive antenna at a time.


(Two humans about 30 feet down range)

The image quality is sufficiently high to resolve multiple humans behind a wall. Humans were located through the three types of wall tested when they were moving or standing still. Humans were located through the 4-inch concrete and cinder block wall even if they were sitting still or holding their breath while standing. Because humans move slightly even while trying to remain still, the radar system detected those small movements by using coherent radar processing techniques


(One of the through-wall experimental setups)

The radar system is located to the right and the cinder block wall is to the left. An absorber is mounted on the vertical reinforcement sections of the wall and clutter fences using a pyramidal absorber are mounted on the front of the wall to approximate the conditions of two-dimensional air-wall-air models. Plywood sheets on the ground allow the radar system to be easily moved around the target area. A Styrofoam "A-frame" holds the calibration target in front of the wall. When measurements are acquired, one or two humans walk around about 10 feet behind the wall.

I use some other sf devices as predecessors in the other stories; here's an amusing reference from a 1936 John W. Campbell story:

"They had the tube then. They called it the PTW tube - Probability Time Wave. They'd been trying to make a television set that would see through walls..."
(Read more)

This passage just goes to show that even seventy years ago, people were thinking about a device just like this one. Gordon Giles used a similar idea in his 1937 story Diamond Planetoid to see which planetoids where worth mining; take a look at the X-beam projector.

From MIT Lincoln Lab.

Scroll down for more stories in the same category. (Story submitted 10/18/2011)

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 ( 0 )

Related News Stories - (" Engineering ")

Wear Your Self-Powered Generator
'It's basically a micro-sandwich...' - Frank Herbert, 1965.

Auto-Focus Smart Glasses Have Liquid Lenses
'Hufhuf oil held in static tension by an enclosing force field within a viewing tube...' - Frank Herbert, 1965.

Google Perfects 'Blade Runner-style' Photo Details
'Pull back... stop... enhance 57-19...' - Blade Runner, 1982.

CloudFisher - Moroccan Fog Farmers Harvest Moisture From The Air
'That moisture trickles down...', Frank Herbert, 1965.

 

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

Keith Laumer's Bolo Autonomous Tanks Right On Schedule
'I cannot lie idle under attack.'

When Computers Develop Their Own Language, Will They Talk To Us?
'The curious absent look of a robot talking on the TBR circuits - the Talk Between Robots radio...'

LipNet Reads Lips - Until Disconnected, That Is
'We'd have to cut his higher brain functions... I'm not sure what [HAL} would think about that.'

Eterni.me - To Skype With The Dead
'Nothing... left of Jeserac but a galaxy of electrons frozen in the heart of a crystal.'

Wearable MRI Is Former Occulus/Facebook Exec's New Project
'Your cephalochromoscope... that you always turn on and play when you get home...'

Ford Stratasys Infinte Build 3D Printer
'He proudly indicated his Buick... Almost as good as the original it was printed from...'

The Space Suit As Personal Spaceship
'Darn clever, these suits...'

Dune Fans! Your God Emperor Is Ready
'If one held a sandtrout in the hand, smoothing it over your skin, it formed a living glove.'

Robot Strolls Field, Examines EVERY Plant
'The great machines that did the work ... required but a few dozen men to cultivate an entire county.'

Sweden Outlaws Drones
'An eye that could not only see, but fly, roam, travel at speeds and in directions to suit its operator...'

Wear Your Self-Powered Generator
'It's basically a micro-sandwich...'

TITAN-III Spider Robot Is WAY Too Quick (Video)
'My little friends can find you wherever you go!'

Bill Gates Suggests Tax On Robots
'A worker replaced by a nubot that 'appears or pretends to be human' had to be compensated...'

Handle, New Wheeled Hopping Robot
'the hopper sprang thirty feet into the air...'

Matrix Sentinel Ancestor, The Pipe Inspector Robot From Krakow
Watch out, Keanu!

Auto-Focus Smart Glasses Have Liquid Lenses
'Hufhuf oil held in static tension by an enclosing force field within a viewing tube...'

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.