active body armor

[misANTHrope]

also, if it is sooo sensitive as the op seems to think it is, it would most likely activate anytime someone in the same platoon fired at the enemy. and anytime they went in an area with weeds, bugs, waving fields of grain, etc, the system would activate.

Why?

Let us assume that it's possible to build, say, a radar system that can detect on object as small as a bullet. From that point, it's fairly straightforward to conceive of a way to distinguish incoming bullets from bugs, thrown rocks, etc. Simply set parameters to measure the Doppler shift of the return, and only react to objects incoming above a critical velocity.

So unless thrown rocks and insects can reach speeds of 2000 fps, false alarms are not a problem.

This is, of course, highly theoretical. I have only rudimentary knowledge of the capabilities of radar, and I acknowledge that there's a big difference between conceptualizing something and actually making it work in real life.

 

[jerkface11]

Of course as long as you're carrying that power source around with you, you might as well have a deathray instead of a rifle.

 

[nalioth]

Of course as long as you're carrying that power source around with you, you might as well have a deathray instead of a rifle.

As of now, this is science fiction.

By the time it becomes science fact, the power supply will be available.

 

[taliv]

How much power do you think you need? 1.21 jiggawats?

Last I checked there were handheld radar in half the cop cars in the country.

 

[VirgilCaine]

There is no such body armor, as it would take a radar sighting system that would fry the user, and super computer to process the information. The bulk alone would require a semi tractor to haul it around, not to mention a second rig to haul the cooling equipment.

And a third truck to carry all the punchcards for the computer, eh?

 

[nalioth]

Let me throw some more stuff out there....

There are plans now in development for each soldier to wear a 'battlefield computer' on his person. This piece of equipment will be outfitted with wifi and radio and cameras and all that stuff. It's supposed to allow the chain of command to be able to see the battle in "real time".

Do you think that should this "battlefield computer" scenario come to pass, that it's not unthinkable that there be a "cloud computer" made up of all the soldiers individual computers?

Do you not think that if such a 'cloud computer' exists, it could take radar input from the whole group and fixed radar emplacements, etc?

This is science fiction at this time, folks, don't get your knickers in a twist calling "hoax" and "bull****".

 

[akodo]

i don't think you can effectively control the intricate coordination of muscle contractions and balance needed to actually move rather than simply twitch.

If you could, you'd be able to use the same technology to allow a paralized person to walk.

 

[Tommygunn]

i don't think you can effectively control the intricate coordination of muscle contractions and balance needed to actually move rather than simply twitch.

If you could, you'd be able to use the same technology to allow a paralized person to walk.

Well, there is actually work being done in exactly this sort of technology, strange as that may seem. Someday it may prove itself enormously beneficial.

 

[jerkface11]

How much power do you think you need? 1.21 jiggawats?

Last I checked there were handheld radar in half the cop cars in the country.

Yet this will take a far more complex and powerful radar system. Capable of reading more than just the speed of the target, tracking more than one target, scanning more than one direction, and picking up much much smaller targets. A LOT more power will be required. So you'd just be better off with a death ray.

 

[Slinky]

why is everyone assuming that this is meant for a battlefield environment? To me this seems to be tailor-made for VIP appearances where the individual in question doesn't want to spend the whole event behind 2 inches of ballistic glass.

 

[taliv]

slinky, that's exactly the sort of thing the patent app references.

jerkface, the system won't need more power than the loudspeakers at the event, so i just don't see power as an issue. how will the death ray stop the bullet?

 

[jerkface11]

An omnidirectional doppler radar with resolution great enough to pick up a bullet at 2500 meters and a computer powerful enough to compute it's trajectory before it gets to you isn't a system that'll run on a 9v battery.

 

[Jorg Nysgerrig]

This reminds of an earlier thread...

Look, Thag invent way to make fire! Thag can make fire anywhere!

Dumb Thag, fire come from sky. Thag would needs 10 mammoths to carry clouds to make fire.

Even if make fire, Thag would burn up! Thag not control fire!

Fire bad idea anyway. Gog say go back to trees!

 

[Gungnir]

Not necessarily, you can create a phased array doppler radar (so no sweeping the antenna). Since the power return from a radar is defined as



Is dependant on many factors (all of which you can control) it really boils down to cross sectional density (sigma), and receiver sensitivity.



If you can create a receiver sensitive enough to detect 1pV return signature, and read a frequency shift for a 3000 fps round, at this the receiver will get a Doppler shift of (using W-band 75GHz) + 250KHz which would not be difficult to detect, ultra accurate bearings would not be needed either 45 degree arcs would be sufficient. You don't necessarily need a high power transmitter, or high gain antenna pushing that much power either. If you set the Range (R) in the equation to a point that gives enough time to "hit the deck" (say 2 seconds) that means assuming a 3000 f/s projectile you only need to detect at 6000 feet. Oscillators of that frequency are light too (monolithic chips) just need an amp.

Don't get me thinking about IR detection at long range

Overall it's doable Many things have changes in even the past 20 years. Just think we sit and type these things into Forums on computers that are perhaps more then 1000 times the computing power that sent the Apollo missions to the moon. Hell my phone has many (not sure how many more than 5 less than 100) orders of magnitude storage capacity of the Apollo 11 mission.