Viewing posts from October, 2013

Blood Sensor for Egg Grading System

I'm designing a spectral-differencing sensor for use in high speed egg-grading machines, to detect blood spots in eggs. This is an interesting problem because it's dominated by nuisance data. Nuisance data are sample variations that produce a signal but aren't what we care about measuring. In this case, porphyrins in brown eggshells have strong absorption features that overlap those of haemoglobin.