DETECTION DEVICE

This detection device comprises: a sensor electrode; a shield electrode that has a parasitic capacitance between the sensor electrode and the shield electrode and is driven by an AC voltage; a detection circuit that is electrically connected to the sensor electrode and the shield electrode and detec...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	FUJIYOSHI, Tatsumi
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS BASIC ELECTRONIC CIRCUITRY CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE DEVICES MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS PHYSICS PULSE TECHNIQUE RELAYS SELECTORS TESTING
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Beschreibung
Zusammenfassung:	This detection device comprises: a sensor electrode; a shield electrode that has a parasitic capacitance between the sensor electrode and the shield electrode and is driven by an AC voltage; a detection circuit that is electrically connected to the sensor electrode and the shield electrode and detects the electrostatic capacitance of the sensor electrode; a capacitor that is connected in series between the sensor electrode and the detection circuit; and a bias unit that biases the potential of the sensor electrode via a resistor.