Society of Robots - Robot Forum
Electronics => Electronics => Topic started by: fallenangel on September 12, 2008, 12:21:30 PM
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Which would be the best sensor to detect non-conductive materials such as glass and plastic?
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That depends on the application. Is it for collision avoidance? If so, ultrasonic would be a good choice. Of course, contact sensors like limit switches could be used.
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It's not to avoid collision. I need to detect plastic bottles and glass bottles in a close range field, about 10'x10' and be able to differentiate between the two. Someone had suggested an optical sensor, but I haven't seen any that will meet the requirement I'm looking for.
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Get a camera on the robot. Try the Blackfin camera.
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depends on the plastic and glasses. What color are they? Are they transparent?
A camera might be the best option. Light sensors can work depending on the material.
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Yes, they are transparent. They are coke products actually. I'll see what I can do with a camera.
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If you go with the camera solution, check out Cognex if you have alot of money available.
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Please don't double post:
http://www.societyofrobots.com/robotforum/index.php?topic=5251
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A camera seems excessive.
You could certainly use a couple of metal probes to touch the item and see if it conducts... Making that reliable would be the tricky part, though. (And this assumes touching the item isn't a problem)