Checking printed circuit boards

Task
A printed circuit board has to be detected reliably using a sensor. Since there are drill holes in the board, laser point detection is not possible, because under certain circumstances the light beam of the diffuse sensor could go through a hole, and then the printed circuit board would not be detected reliably.
Solution
A laser line diffuse sensor capable of suppressing the multiple holes is used, which means it can reliably detect the printed circuit board.

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