Slashdot Mirror

← Back to Stories (view on slashdot.org)

Caltech Creates Electronic Nose

Posted by ScuttleMonkey on from the smells-like dept.

eldavojohn writes "Researchers have created an electronic nose that can detect odor and identify which odors are a concern to it. From the article, 'The Lewis Group a division of Chemistry and Chemical Engineering at Caltech have a working model of an electronic nose. The efforts of Caltech scientists has led to an array of simple, readily fabricated chemically sensitive conducted polymer film. An array of broadly-cross reactive sensors respond to a variety of odors. However, the pattern of differential responses across the array produces a unique pattern for each odorant. The electronic nose can identify, classify and quantify when necessary the vapor or odor that poses a concern or threat.'"

10 of 154 comments (clear)

  1. Why fix what isn't broken? by TheTopher · · Score: 4, Informative

    As a student at Caltech in Prof. Nate Lewis' Chemistry class, I feel obligated to ask why the correct spelling of "Caltech" from the article was converted into the incorrect spellings of "CalTech" and "Cal Tech"? I realize that we don't conform to the usual abbreviation for Tech schools but it's a "little t" for "Caltech"

  2. Artificial Nose by sqrt(2) · · Score: 3, Interesting

    I've always thought it interesting that creating an artificial nose (sense of smell) has lagged so far behind the other senses. Vision, that's easy, cameras have sharper resolution than our pathetic biological eyes. Hearing, again, sensitivity of microphones has easily surpassed human ability. There's the sense of touch, but we can cheat and make sensors that detect resistance to motion, being able to feel and discern texture is harder however. Sense of smell is probably the most abstracted and subjective, so it's no wonder it's the most difficult to replicate with technology. Most of the artificial "nose" tech is just checking for the presence of certain chemicals in the air.

    --
    If you build it, nerds will come. Soylentnews.org
    1. Re:Artificial Nose by allcar · · Score: 5, Interesting

      Similarly, use of odour in entertainment is way behind the more "mainstream" senses. There are a few museums that have used smell as part of there displays - The Imperial War Museum in London is a good example. The 1st World War trench exhibition uses artificial smells to bring you that delightful blend of excrement and cordite.
      However, in general films and games have steered clear of the sense of smell. In gaming, visuals and sound are a given. Vibrating controllers try to deal with the sense of touch. Smell (and taste) have been ignored. As usual, it will probably be porn that leads the way - just think of the possibilities!

    2. Re:Artificial Nose by Mathinker · · Score: 4, Interesting

      It's also probably the sense which has the greatest genetically based phenotypical variation. To put it simply, there's probably more average difference between "normal" individuals' olfactory experiences than those of sight, hearing, taste, and touch.

      That might just be because we rely so little on smell, what is accepted as normal has expanded with respect to this sense (as opposed to color-blindness, for example).

    3. Re:Artificial Nose by phozz+bare · · Score: 4, Funny

      As usual, it will probably be porn that leads the way - just think of the possibilities! Like, ew?
  3. Old news? by ledow · · Score: 4, Interesting

    Am I the only person (in the UK) who saw the Tomorrow's World back in the days of Phillipa Forester or earlier where they had something IDENTICAL to this and were "on the verge" of commercialising it.

    I seem to remember something about they discovered the material being tested for aircraft use until they realised that the strong odours of a busy airport made the properties of the material change, then they put it into an electronic nose. I also remember a demo where the machine detected the difference between "normal" and "rancid" mayonnaise by smell alone.

    It seems that this is one of those inventions that just keeps popping up but nobody ever really finds a commercial use for it that can make all the development costs worthwhile.

    1. Re:Old news? by Mr.+Underbridge · · Score: 3, Informative

      Am I the only person (in the UK) who saw the Tomorrow's World back in the days of Phillipa Forester or earlier where they had something IDENTICAL to this and were "on the verge" of commercialising it.

      This is in fact old news. The first publication from this research group regarding chemical sensing was in 1995. I don't think any major breakthroughs have been made recently.

      See http://www.pnas.org/cgi/content/abstract/92/7/2652

      That's not to say it isn't interesting - I have experience in the chemical sensing field so I think it's cool - but it's definitely not news.

  4. Hold it in by doyoulikeworms · · Score: 3, Funny

    Because futuristic elevators are going to be really awkward.

  5. Medical applications by apodyopsis · · Score: 4, Interesting

    It is well known that dogs keen sense of smell can detect illness and cancers. Lets hope this thing can be turned into something sensitive enough and cheap enough for widespread medical use. This could save lives.

    for the interested: http://news.nationalgeographic.com/news/2006/01/0112_060112_dog_cancer.html

  6. Now they can build the Smelloscope by Gar0s · · Score: 3, Funny

    FRY: This is a great, as long as you don't make me smell Uranus. Heh heh.
    LEELA: I don't get it.
    PROFESSOR FARNSWORTH: I'm sorry, Fry, but astronomers renamed Uranus in 2620 to end that stupid joke once and for all.
    FRY: Oh. What's it called now?
    PROFESSOR FARNSWORTH: Urectum.

    --
    I'll wager 400 quatloos on the newcomer