| 摘要 |
<p>PROBLEM TO BE SOLVED: To suppress the useless consumption of power when a malfunction by noise or the like is generated even while controlling a load with excellent responsiveness. SOLUTION: While a person is present in the detection area of a heat ray sensor 12, in a signal processing part 10, human body detection signals are intermittently generated. When the human body detection signals are generated, an illumination load L1 is lighted through an illumination control part 11, however, when the generated number of the human body detection signals within judgement time is less than a stipulated number, the illumination load L1 is put out. When the generated number of the human body detection signals reaches the stipulated number within the judgement time, normal control is performed thereafter. Thus, since the illumination load is lighted with excellent responsiveness by the human body detection signals and put out after the judgement time in the case of the malfunction, the useless power consumption is suppressed.</p> |
