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 ")

Super-Resolution Microscopy Provides '4D' Views
View the magnified interior of living cells.

Physicists Try To Turn Light Into Matter
If E=mc squared, then... m=E/c squared!

Dune Fans! Power Your Devices With Sweaty Shirts
Yet another power source from humans.

Zero Mass 'Vaporators' Pull Drinking Water From The Air
Did you think of Star Wars?

 

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

Swarm Of Mindless Robots Works Together
'Very tiny pseudo insects that... can unite to form a superordinate system.'

SpotMini Robot Dog, Autonomous And On Sale In 2019
Great, an autonomous slamhound. It is cute, though.

RoboFly Is Laser-Powered, Adorable
Don't swat this fly!

MSG Sphere Las Vegas, ala Star Wars
'The smoky globe, hung in the vault, was shot with colored light...'

Tetraplegics Dominate Avatar Races
Well, just speaking brain-to-computer...

MIT Ampli Blocks Build Biomedical Devices
Damn it Spock, I'm a doctor not an engineer!

UberAIR Asks For Skytaxi Landing Prototypes
You know you want to ride in one.

Boring Tunnel Almost Ready
Your underground future is calling!

Handheld Human Skin Printer
It outputs a thin wad of uniflesh.

Healthy Fast Food Courtesy Of Robot Chefs
'The electric cook was stirring empty nothing in a pan, with a zeal worthy a dozen eggs.'

Mass Production Of In Vitro Meat From One Sample
They're Assimilating Our Culture, That's What They're Doing

Amazing 'Hybrid' Solar-Powered Sea Slug Does Photosynthesis
Thank goodness for Star Trek.

Retinal Prosthesis Uses Organic Printing Inks
We can rebuild you - well, your eyes, maybe.

Should You Submit Your DNA To A Database?
Consumer DNA services are often inaccurate.

Squid-Like Robots Soon To Be 3D Printable
'It was a chemotactic artificial jellyfish designed to slither...'

Humans Evolve Deep Diving Abilities
Sounds like '60s sci-fi to me.

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.