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 ")

Humans Use Mental Power For Turtle Slavery
Now we need to start looking for animals with fingers...

Solar-Powered Moisture Vaporator
'The atmosphere yielded its moisture with reluctance.' - George Lucas, 1976.

Smartflower Solar Panel Unfolds In Video
'...the slender stalks of a sunshade-photocell collector.' - David Brin, 1990.

3D Printed Prosthetic Coral
Be sure to read The Diamond Age - still worth it.

 

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

Cattle Avoidance Feature In Indian Autonomous Cars
'The driver went about the business of gently slipping the teflon-coated metal scoop beneath the first animal...'

Project KOVR Fashion Protection From Infosphere
'... the entire shroudlike membrane took on whatever physical characteristics were projected at any nanosecond.'

Twist Bioscience High Density Digital Data On DNA
'They tied the memory to the bloodline and that was their record!'

'We're Not Creating A Terminator' Say Russians About Gun-Wielding Robot Fedor
Nobody is thinking about the Terminator. Westworld, maybe.

Vantablack Now IMMEASURABLY Black
'a black coating now thatís ninety-nine percent absorptive...'

Mercedes-Benz Autonomous Taxi Fleet In 3 Years
'... the taxi utilized sophisticated electronic sensors to perceive its surroundings.'

Is 'The Pulsar Positioning System' Evidence For SETI?
'For a hyperspace jump, you need at least four beacons for an accurate fix.'

Someday, You Might Like VR Enough To Move In
'That barrier was going to melt away someday soon. The transhumanists had promised...'

Humans Use Mental Power For Turtle Slavery
Now we need to start looking for animals with fingers...

Solar-Powered Moisture Vaporator
'The atmosphere yielded its moisture with reluctance.'

DxtER! Tricorder Prize Won By Final Frontier Medical Devices
We've been waiting a long time for this, Star Trek fans.

President Trump's Wall As Otra Nation Hyperloop
'...an hollow tube must be constructed the whole distance... as to admit a four wheeled carriage...'

Pickup Lines From Artificial Intelligences
'They hate us, you know... The humans. They'll stop at nothing.'

Pooper Scooper Drone Robot Watchdog 1
'Robots pick up the garbage and junk...'

Cassie Robot Brings AT-ST Walker To Life
There's even a log test!

Hundreds Of Robot Lawnmowers Invade Texas Town
'The mower reached the edge of the lawn, clucked to itself...'

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.