A device for detecting an approach distance of a living body is provided. The device detects hover touch. The surfaces of a first electrode and a second electrode are covered by an insulator to form an electrode section. A high-frequency power source is connected to the first electrode via an inductive element for forming a resonance circuit. An ammeter is connected to the second electrode. A correlation between a resonance frequency and a resonance resistance is obtained. It is determined that the living body is in hover touch with the electrode section when the resonance resistance is higher than an initial resistance corresponding to a leakage resistance between the first and second electrodes, and the resonance resistance increases or decreases whereas the resonance frequency decreases or increases, based on the correlation.
DEVICE FOR DETECTING APPROACH DISTANCE OF LIVING BODY
2018-04-05
Patent
Elektronische Ressource
Englisch
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