IR Chemical Communication Graffiti Tags Wanted By DARPA

The Chemical Communications (ChemComm) program objective is to encode and transmit information in a rapid and covert manner. DARPA is asking for proposals for a PDA-sized device that will quickly print out coded tags, with a specific message, for placement in strategic locations in different environments, to be read by unmanned aerial vehicles (UAVs) or planes. The tags will be used to mark locations of interest, identify friendly forces embedded or trapped in combatant zones, and in various surveillance and reconnaissance missions.

Specifically, DARPA wants these features:

  1. Permits the user to input an arbitrary 60-character alphanumeric message;
  2. Translates the message into an appropriate set of modulated chemistries;
  3. Embeds these chemistries into a disposable substrate (the transmitter); and
  4. Ejects the substrate for deployment.

DARPA suggests that oscillating chemical systems could form time-repetitive sequences of characters, or that a chemical shutter could generate a modulated optical signal from one static chemical function. However, any innovative approach that meets the goals of the proposal will be considered.

DARPA envisions the disposable transmitter having a "weight and form factor ranging from a sheet of paper to a piece of string, possibly with an adhesive backing for deployment on all surfaces."

The "substrate" or transmitter is thus a graffiti tag, but not like the ones that you see in alleys and on trains. DARPA prefers that the message be transmitted invisibly, using near infrared (NIR) or short-wave infrared (SWIR).

Science fiction writers could make several suggestions here. For one thing, you will want a strongly adhesive backing that would resist any efforts to remove it. In other words, a smart tag as described in All Tomorrow's Parties, a 1999 novel by William Gibson:

Someone had once come up with a smart tag, a sort of decal they'd somehow adhered to the [smart] wall, although [they] had not been able to figure out how they'd done it without being seen. Maybe they'd shot it from a distance.
(Read more about the smart tag)

Smart tags were created in response to smart material, a special finish that would "eat" graffiti, which would be the expected enemy response to DARPA ChemComm tags:

The gang kids would come and tag it; twenty minutes later these flat, dark, vaguely crab-like patches of dark blue would come gliding out around the corner… They seemed to be embedded, a few millimeters down into the surface, which was a sort of non-glossy gel-coat affair, but able to move around under there.
(Read more about smart material)

DARPA also does not specify what the transmitter, ideally a "sheet of paper," should look like. If it covers a surface that is visible to a UAV, a person might also be able to see it. The sheet should therefore look like it belonged there.

One approach would be to disguise it as anti-American graffiti or posters of local political figures. Graffiti in Baghdad was once punishable by death; now it is commonplace.

However, in villages, Iraqi army soldiers and Multinational Division–Baghdad patrols often paint over graffiti whenever they see it. You don't want your own troops painting over your expensive DARPA-produced ChemComm tags.


(Child paints over graffiti)

The other obvious thing to do is to make the tags invisible. They could be made of clear, non-reflective plastic, or the tags could actually be invisible. See Invisibility Cloaks Seen As Possible With Metamaterials and Invisibility Possible With Superlenses for details on progress in this area.

As with any DARPA proposal, the technologies are years away from being usable. However, if DARPA wants to get started right away with a quick, homebrew technology that already works, they should try making some LED Throwies.


(LED Throwie)

An LED Throwie is basically a light-emitting diode taped to a small circular battery, in turn taped to a small circular magnet. Change the standard instructions by using an infrared LED, then add a little IC that accepts your 60 character code and transmits it in the DARPA-approved manner, and presto! your chemical communications gear is ready and you can start tagging.


(LED Throwie enthusiasts tagging a building)

I also wonder whether or not DARPA is thinking far enough out of the box on this one. For example, why not have this robot painter actually create a composition on the roof or the wall, using chemical paints that provide the necessary signalling features?

Read more about the DARPA Chemical Communications (ChemComm) program. Take a look at these instructions for making an LED Throwie, as well as a movie demonstrating LED Throwie tossing technique. See science-fictional technologies come to life in this DARPA project list.

Scroll down for more stories in the same category. (Story submitted 3/29/2007)

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 ( 2 )

Related News Stories - (" Surveillance ")

Zephyr Solar-Electric Stratospheric Drone
'The planes flew continuously, twenty-four hours a day...' - EB White, 1950.

Robot Hummingbird Hovers Biomimetically
'With a buzz... it started out on its journey.' - Raymond Z. Gallun, 1936.

Capitalist Big Brother Co-Opts Regular Big Brother
'It was even conceivable that they watched everybody all the time.' - George Orwell, 1948.

Juggalo Face Paint Disrupts Facial Recognition
'... designed to foil facial recognition systems.' - Neal Stephenson, 2019

 

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

Zephyr Solar-Electric Stratospheric Drone
'The planes flew continuously, twenty-four hours a day...'

Robot Hummingbird Hovers Biomimetically
'With a buzz... it started out on its journey.'

Harvest Water From Air With Sunlight
'The atmosphere yielded its moisture with reluctance.'

Capitalist Big Brother Co-Opts Regular Big Brother
'It was even conceivable that they watched everybody all the time.'

A Floating Cosmodrome
'...a single perfectly level platform, which rose so high above the water that it was not splashed by the waves.'

First Artificial Memory Formed In Animals
'Is an extra-factual memory that convincing?' Quail asked.

Maintain Your Megastructure
Megastructures have repair robots, which have repair robots, ad infinitum.

Venezuelans Teaching Your Self-Driving Car
‘She wouldn't stop until Antar had told her everything he knew...’

Robothread Robotic Worms Crawling Through Your Brain
Perfect for clot-busting in the human brain. No Raquel Welch and no lasers, though.

Vantablack BMW X6 Is Douglas Adams Approved
'It's so... black!' said Ford Prefect.

Humanoid Robot's Muscles Biomimic Ours
'It is remarkable that the long leverages of their machines are in most cases actuated by a sort of sham musculature...'

Animatronic Robotic Baby Exposed
'The birth of Machine, my robot child...'

Beijing HaiDiLao Robotic Hotpot Restaurant Now Flavored By Artificial Intelligence
'Kantos Kan led me to one of these gorgeous eating places where we were served entirely by mechanical apparatus.'

Plants of the Future - What Should They Be Like
'He almost choked in his astonishment. Mashed potatoes and brown gravy!'

China Deploys Robot Traffic Police
'The robot came up smooth and fast as a rocket...'

Better Than Dune Chromoplastic? This Guy Might Have Done It
'But when Old Father Sun departs, the chromoplastic reverts to transparency in the dark.'

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.