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Topic: how to make three-dimensional objects completely touch sensitive (Read 6 times) previous topic - next topic

starsraindown

Hi!

I was just trying to research how to make a three-dimensional object completely touch sensitive without using external devices like hd-cameras or infrared cameras. The object is made of metal and completely conductive. Capacitive sensors? Piezos? Any idea?

My aim is to built a sculpture with artificial intelligence that interacts emotionally and sensually with the observer. The touch sensibility would be an important element amongst other forms of intelligence and emotion tracking.

This is the whole project: http://vvvv.org/forum/community-project

Thank you in advance for your help!!

Valentin

EVP


starsraindown

#2
Jul 26, 2012, 02:21 pm Last Edit: Jul 26, 2012, 02:30 pm by starsraindown Reason: 1
well, the metal-surface I am going to use is already conductive.

the question is rather how to detect -

1)if it got touched (simple capacitive sensing)

2) where exactly the three-dimensional surface got touched (the main problem!).

mabe also 3) how it got touched (http://www.disneyresearch.com/research/projects/hci_touche_drp.htm)


The second and third task cannot be performed onboard, I will trie to use PureData fot that.

Thanks for replies!


Magician

How big object is? I'm thinking to wrap it in many  FSR.

focalist

#4
Jul 26, 2012, 03:55 pm Last Edit: Jul 26, 2012, 04:20 pm by focalist Reason: 1
Hmm..

I am wondering if there's maybe a way you could coat it with something similar to graphite, followed by a conductive paint, followed (probably) by some type of flexible layer to keep it all tidy.  Pressure on the outer paint surface compresses the graphite, creating a resistance.  I think there's some way you could set it up to work as a "sheet" wrapped around the surface, then using the resistance taken from several locations on the perimeter, maybe there's a way to calculate location.  Of course, multi touch would immediately mess it up.

So, how about you paint on a graphite layer in smaller areas, then conductive, then sealant top layer.. creating individual variable resistors?

Graphite may not be the right stuff, but the idea is the key.  For some reason, Zinc Oxide comes to mind, from some science demo from youtube or some nonsense.. I don't know if Piezo would work, as they usually are for knock sensors, I am not sure if they produce any type of variable continuous output that could be used to measure force, like a strain gauge..
When the testing is complete there will be... cake.

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