Patent ID: 8872621
Filing Date: 2014-10-28
Classification: E05B,H03K

Abstract:
1. A capacitance type detection device which detects an approach of an electroconductive detection object comprising: a sensor electrode forming a capacitor with respect to a peripheral conductor; a measurement unit measuring a floating capacitance, which changes correspondingly to a positional relation between said sensor electrode and said detection object, of said sensor electrode; and a judgment unit configured to judge whether a magnitude correlation between a rate of change of the floating capacitance measured by said measurement unit and a predetermined rate of change of the floating capacitance, which is defined correspondingly to a combination of said detection object and another object to be discriminated from said detection object, satisfies a predetermined relation, wherein a threshold table, in which the predetermined rate of change of the floating capacitance is registered, is used in the judgment unit.