| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a human body detection sensor capable of detecting an approaching human body even if an object to be detected and a human body detection sensor is apart from each other by some distance.SOLUTION: A human body detection sensor 1 comprises: an oscillator 10 which generates a high-frequency electric signal; a band-stop filter 20 which is connected to the oscillator 10 and to which an electric signal is input; and control means 30 for detecting an approaching human body by using the oscillator 10 and the band-stop filter 20. The band-stop filter 20 has at least one resonance circuit including a variable capacitive element or a variable inductor element whose characteristics varies corresponding to an approaching object, and the control means 30 performs identification whether or not an approaching object is a human body on the basis of a signal attenuation amount calculated from a signal level of an electric signal which is input to the band-stop filter 20 and a signal level of an output signal which is output from the band-stop filter 20.</p> |
