>-----Original Message----- >From: Todd Zuercher >Sent: Monday, August 18, 2014 12:46 PM >To: Enhanced Machine Controller (EMC) >Subject: [Emc-users] Machine Vision? > >I've had a problem proposed to me. Any ideas or suggestions? > >A series of randomly sized wooden pieces (uniform thickness) placed >randomly on a slow conveyor. Each piece has 1 to 4 small pockets milled in >them. I would like to automate a method of blowing out the dust left from > >milling the pockets. How hard would it be to detect the location of these >pockets, position an air nozzle over the pocket and clean them with a short >air blast as they are carried down the conveyor. > >-- > >======================================== > >Todd Zuercher >mailto:zuerc...@embarqmail.com > >======================================== >------------------------------------------------------------------------------ >_______________________________________________ >Emc-users mailing list >Emc-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-users
I don't know much about the PC base software but I used to work as a machine vision system integrator around 15 years ago. For detecting pockets you can use a structured lighting like light from an angle to make shadows show up where the pockets are. Another idea is to use a laser line generator at an angle, the line will shift to different positions at different heights allowing you to detect pockets and ignore the bottom of the belt. Also, the laser shows up bright and the ambient lights don't effect it as much. Camera's are sensitive to IR light and many have a filter to reduce the IR sensitivity. I used to take the filters out and supply IR light sources, this makes the camera see the IR light source I provided more than the inconsistent ambient light. Another idea is to have a sheet up to block light and have a light on the other side at an angle. This is like a light shining under a door, the pockets would allow light in a region lower than the top of the parts but above the conveyor. Same idea as the laser line but without using the laser. Roger Neal ------------------------------------------------------------------------------ Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
