Force detector

Details Force detector Force detector

2006-10-17

2006-10-17

Nguyen, Vincent Q. (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C073S862430

Reexamination Certificate

active

07123028

ABSTRACT:
The invention provides a force detector in which power consumption is suppressed. Four electrodes E11through E14are formed on a substrate, and an elastic deformable body formed of a rubber film is disposed thereon. A conductive coating is applied on the lower surface of the elastic deformable body to provide a displacing conductive layer26. Four capacitance elements C11through C14are comprised by the electrodes E11through E14and the displacing conductive layer26opposed to the electrodes. The capacitance values thereof are converted into voltage values V11through V14by C/V converter circuit50, and based on operation by signal processing circuit60, an external force applied to the elastic deformable body is detected. A pair of contacting electrodes E15and E16are formed on the substrate, and when an external force with a predetermined strength or more is applied, the elastic deformable body deforms, and the displacing conductive layer26comes into contact with both electrodes E15and E16, simultaneously. The potential of the electrode E16is taken-in from the terminal T5, and when said potential is Vcc, the C/V converter circuit50is operated in a standby mode with less power consumption, and when said potential is GND, the circuit is operated in a normal mode.

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