[Retracted] Artificial Intelligence in Recording the Number of Times the Ball Has Crossed the Net in a Badminton Game

Table 1

Performance index of new type badminton automatic engine.

Project	Index	Actual
Ball speed	30 km/h ~180 km/h	25 km/h ~150 km/h
Ball speed error	±0.8 km/h	±1.0 km/h
Horizontal azimuth angle	-25° ~25°	-15° ~35°
Pitch azimuth angle	-10° ~40°	-20° ~20°
Serve frequency	0.5 s ~6 s each	1.5 s ~4.5 s each
Number of storage balls	120	90
Serve type common ball	1170	970
Remote control distance	10 m	15 m