Filtering that qualifies an input-state change to suppress unwanted brief or repeated transitions before they are treated as valid events.
Also called: input debouncing; debounce filter; debouncing; digital debounce.
How debouncing suppresses unwanted transitions
Debouncing suppresses unwanted brief or repeated transitions before downstream logic accepts a state change. Depending on the implementation, it may require a continuously stable state or qualify sampled states against a filter clock.
Ask which transitions represent the intended product event and which are unwanted. A sensor output setting, an input-module filter and a program rule can act at different points in the signal path. Suppressing more transitions is not by itself evidence that the product count improved.
It can suppress a genuine event if the event fails the qualification rule. A short pulse can disappear under a continuous-state or sampled filter. Duration alone does not establish whether that pulse was interference or a real product event.
Compare known product events with the incoming and accepted signals. Include both the product-occupied and clear intervals, because filtering can delay either transition and suppress a genuine event.
No. Debouncing acts on the transitions already present in the signal. If two overlapping tablets produce one optical event, filtering cannot recover the missing distinction between them. Product presentation and double detection address that separate problem.