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CAPACITIVE PROXIMITY SENSOR AND DOOR HANDLE DEVICE COMPRISING THE CAPACITIVE PROXIMITY SENSOR
The resonance frequency of an LCR resonance circuit is f1 and the determination voltage signal is V1, when an object is not in the proximity of a sensor electrode. The resonance frequency of the LCR resonance circuit is f2 and the determination voltage signal is V2, when a human body is in proximity of the sensor electrode 22. The resonance frequency of the LCR resonance circuit is f3 and the determination voltage signal is V3, when water is in the proximity of the sensor electrode. The LCR resonance circuit has the relationship f1>f2>f3. A control unit controls a high-frequency signal S0 so as to satisfy the relationship V2>V1>V3, and a human body or water being in the proximity of the sensor electrode is distinguished.
CAPACITIVE PROXIMITY SENSOR AND DOOR HANDLE DEVICE COMPRISING THE CAPACITIVE PROXIMITY SENSOR
The resonance frequency of an LCR resonance circuit is f1 and the determination voltage signal is V1, when an object is not in the proximity of a sensor electrode. The resonance frequency of the LCR resonance circuit is f2 and the determination voltage signal is V2, when a human body is in proximity of the sensor electrode 22. The resonance frequency of the LCR resonance circuit is f3 and the determination voltage signal is V3, when water is in the proximity of the sensor electrode. The LCR resonance circuit has the relationship f1>f2>f3. A control unit controls a high-frequency signal S0 so as to satisfy the relationship V2>V1>V3, and a human body or water being in the proximity of the sensor electrode is distinguished.
CAPACITIVE PROXIMITY SENSOR AND DOOR HANDLE DEVICE COMPRISING THE CAPACITIVE PROXIMITY SENSOR
KUBO MAMORU (author)
2017-12-07
Patent
Electronic Resource
English
Capacitive proximity sensor and door handle device comprising the capacitive proximity sensor
| European Patent Office | 2019
Capacitive proximity sensor and door handle device comprising the capacitive proximity sensor
| European Patent Office | 2018
Capacitive proximity sensor and door handle device comprising the capacitive proximity sensor
| European Patent Office | 2019