Presence detector for carpet has electronic system that converts variation in distance between conductive layers of condenser structure into signal that indicates presence of object or person on carpet

摘要

A condenser structure between a woven upper decorative layer and a woven lower base layer includes a dielectric arranged between conductive layers of latex. The capacitance of the condenser structure varies according to the distance between the conductive layers. An electronic system converts the variation in distance into a signal indicating the presence of an object or person on the carpet.