| 摘要 |
<p>PROBLEM TO BE SOLVED: To detect maneuvering without erroneous information or misinformation by exactly detecting human body in a detection area. SOLUTION: Comparators 4a to 4c compare the levels of detection signal S1 detected with an infrared sensor PIR at a plurality of steps VH, VM and VL. Comparators 4d and 4e compare the levels of detection signal S2 detected with a microwave sensor MWDM at a plurality of steps VH and VM. A logical judgment part 5 judges which of human body invasion, maneuvering to the device or normal state by the combination of the comparison steps of the detection signal S1 of the infrared sensor PIR and comparison steps of the detection signal S2 of the microwave sensor MWDM. Furthermore, based on whether or not the levels of detection signal S2 detected with a microwave sensor MWDM continues for specific times Ta or Tb, which of the human body invasion, maneuvering to the device or normal state are diversified to judge.</p> |
