[Retracted] An Extraction Method of Volleyball Spiking Trajectory and Teaching Based on Wireless Sensor Network

Table 1

Acceleration sensor output data.

Time (ms)	ax	ay	az
20	0.193854	0.584652	9.536421
40	0.193985	0.596421	9.541261
60	0.194254	0.597541	9.551324
80	0.196584	0.598541	9.563181
100	0.198452	0.599621	9.571642
120	0.199554	0.601548	9.584621
140	0.200142	0.602485	9.594121
160	0.201254	0.603541	9.642415
180	0.212354	0.604852	9.658541
200	0.215846	0.605841	9.681122