gautiercap Posted May 21, 2015 Report Share Posted May 21, 2015 Hello, I’m currently working as an intern in AREVA (France) on a project that involves inspecting surfaces of nuclear plants primary components (mostly the reactor vessel and the lid) to look for defects and try to automatize the procedure. It’s currently done by watching hour long videos and the procedure, besides being both tiring and time consuming, leads to a high variability in judgments. I thought about using the PTM/RTI method and my supervisor agreed to let me buy the tools required to build a dome. Its diameter will be 450 mm and I’ll be using 96 white LEDs as light sources. I’ve been strongly inspired by the work of G. Le Goïc and S. Samper (2011) who used the PTM technique for detection of appearance anomalies in high-value products requiring a perfect surface quality (watches, automotive, medical, automation). I had some questions regarding this project and thought this forum could be of great help. Firstly, I have some apprehension concerning the position of the 96 holes in the dome. I don’t really know how to go with the drilling procedure and how to be sure their orientation is rigorous. I included a scheme of said dome in the message. Then, is it absolutely necessary to use reflecting spheres or can the light position coordinates be calculated using another method? I don’t really see how I could include spheres in the dome without obscuring the lowermost part of it. I’m also guessing it’s really important to make sure the inside of the dome is kept in the complete dark when all LEDs are turned off, right? Lastly, the goal would be to automatize the process of finding defects. These defects are usually cracks, gutters, porosities, metal grindings, etc… I was wondering how the processed data could be treated using PTM/RTI to highlight such anomalies? Is it even possible with proper software or with different equipment? Thank you so much in advance, I’ll make sure to update the post from time to time if I have further issues or if you guys are simply interested in the project. Gautier Link to comment Share on other sites More sharing options...
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