Scanning For People Through Walls

cloudmaster writes: "RADAR-based "flashlight" for detecting movement (and respiration?) through walls and clothing: http://unisci.com/stories/20012/0416015.htm There's a bargraph that rises and falls as a person on the other side breaths... It needs to be held perfectly still, or it will detect it's own movement too, though. I wanna know why they don't just use an acelerometer to detect the devices motion and subtract that from the detected motion?"

Comments

UWB can do this too

[tzanger]

I've been keeping my eye on Ultra WideBand for a while now; it has very surprising uses in positioning, communication and measurement. There's even a working group which tries to keep tabs on the entire area.

Years ago I heard about time-domain. I don't work for them but when I first heard of them I thought it was vaporware. I'm kind of sorry I didn't take them seriously the first time around.

Accelerometer

[cperciva]

I wanna know why they don't just use an acelerometer to detect the devices motion and subtract that from the detected motion?"

I'd guess that they don't have accelerometers accurate enough for the purpose. They're dealing with *very* small movements.

Does it only detect human movement?

[kalifornia]

I feel bad for the dog that accidently gets shot when the sensor reads its motion and the police are expecting to apprehend a criminal inside the house.

It won't work through metal, so..

[human bean]

we had all better stock up on aluminum foil before the drug dealers and terrorists start buying it up for use as wallpaper. :)

Or maybe the mylar metallic print wallpaper from the seventies will make a return. :(

Since it detects motion, one wonders how well it does with differentiation, what happens with large dogs, kinetic sculpture, mobiles, etc.