Title:
capacitive proximity sensor
Document Type and Number:
Japanese Patent JP7246714
Kind Code:
B6
Abstract:
To provide a resonance-type capacitive proximity sensor achieving a cost reduction.SOLUTION: A capacitive proximity sensor 1 of the present invention includes: oscillating means 33 outputting a high frequency signal; an LCR resonance circuit 10 which includes a sensor electrode 11 and into which the high frequency signal is input; a sensor circuit 20 outputting a determination voltage signal according to the capacitance of the sensor electrode 11; and a control section 32 detecting the proximity of a human body to the sensor electrode based on the determination voltage signal. If a determination voltage signal S1 becomes Vth2a or more after becoming a minimum voltage of Vth1a or less and Vth3a or more, the control section detects the proximity of a human body to the sensor electrode 11.SELECTED DRAWING: Figure 5
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Application Number:
JP2019092655A
Publication Date:
February 26, 2024
Filing Date:
May 16, 2019
Export Citation:
International Classes:
H01H36/00