I'm doing some industrial work and I am looking for some feedback and ideas.
The issue is some boxes are getting through without tape on the bottom, someone goes to lift them up and all the stuff falls out.
I am looking for a sensing solution that can detect clear packing tape on a variety of colored boxes.
It looks like there are some sensors for "gloss" detection
keyence CZ-H72 And the Sick OPR20G seem to be good options.
The Keyence seems to do some kind of fancy polarization measurement to determine how much of the light was reflected and how much was defused.
The Sick one simply illuminates the surface and a sensor determines how "Tight" the reflection is
However the painted craft paper boxes we use are very matte.
Looking over the details of how some of the fancy gloss sensors work they just reflect light off the surface at an angle
The steeper the angle the less defuse light will reflect to the photo-sensor.
It seems like one could just angle a tx and rx sensors so they bounce off the bottom of a box at 90° and that would produce a strong signal to noise ratio, perhaps some simple polarization.
It will take some tweaking to get the level right. But I suspect it would work well enough.
It may not be quite as nice as the 2000$ sensor solutions but we can deal with some false negatives.
Anyone have thoughts or other ideas?