Indoor archery scoring system using 4 piezo sensors and Raspberry PI (for LetGo indoor archery center in Shinchon, Seoul)
method1 based on 'A New Self-Calibrated Procedure for Impact Detection and Location on Flat Surfaces' (J. A. Somolinos, Amable López, R. Morales and Carlos Morón) https://www.researchgate.net/publication/236977397_A_New_Self-Calibrated_Procedure_for_Impact_Detection_and_Location_on_Flat_Surfaces
method2 based on young-sik, Yoon's Idea(use time differences as a feature of score for machine learning)