| 摘要 |
<p>PURPOSE:To enable accurate detection of approach of a human body by connecting two metal plates to an output terminal of an oscillator and a grounding point and by providing a detector which detects a change in a voltage value of a resonance signal generated by the approach of the human body. CONSTITUTION:A human body approach sensor 10 is connected to an output terminal of an oscillator 11 generating a resonance signal and to a grounding point and has two metal plates 12 and 13 forming an electric field between them. When a person approaches the sensor 10, the strength of the electric field changes and a voltage value of the resonance signal is reduced. When the voltage value is lower than a standard voltage, a control output is generated for a load, in a detector 14, in accordance with the change in the voltage value. In this way, the approach of a human body can be detected accurately.</p> |
