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Appendix I: PIR Detection Zone
The figure4 shows the detection range in different detection angle. When
the detection angle is 35°,the detection range is 50ft. When the detection
angle is 52°,the detection range is 30ft.
Figure 4
The PIR detection angle (
α
) is just barely larger than the field of view
angle(
β
). The advantage of this design is to avoid empty pictures and get
available pictures.
Figure 5
