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Ultrasonic crack detection in glass bottles

Ultrasonic crack detection in glass bottles

(OP)
I'm working on a project for a bottling plant that is trying to make a vision-based machine to detect cracked glass bottles before they attempt to fill them.

It seems that the vision & backlight approach is the standard way to do this in the industry, but the shape of the bottle in this application makes this a tricky/expensive machine.

I'm wondering if anyone has any experience with some type of ultrasonic crack detection methodology? I'm just going on a hunch here, but I think that at least some cracks should change the resonate frequency of a bottle enough to detect the change..

Cook Automation, LLC
Machine Design, Robotics, Custom Automation, Machine Vision
www.cookautomation.com

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