Our experiments consisted of capturing PIR sensor signals
while experimental subjects walk in eight directions in a
monitored field, as shown in Fig. 5. The monitored field is
a 3.6 m square, and the ceiling is 2.6 m high. The moving
direction detecting device is attached to the ceiling in the
middle of the filed. We have collected PIR sensor signals from
six experimental subjects. The average height of the subjects is
174.17 cm and the standard deviation is 4.07 cm. The average
weight of the subjects is 69.83 kg and the standard deviation