Patent ID: 9189120
Filing Date: 2015-11-17
Classification: G06F

Abstract:
1. An apparatus for detecting location coordinates of a pressure point within a sensor field, the apparatus having: a measurement and evaluation circuit; at least one electric resistance layer having an edge and at least three electric connections at the edge and connected via the at least three electric connections to the measurement and evaluation circuit, an internally-charged cellular polymer; and an electrically conductive layer; wherein the at least one electric resistance layer is applied directly to a first side of the internally-charged cellular polymer so that the at least one electric resistance layer forms a first cover layer; wherein the electrically conductive layer is applied directly to a second side of the internally-charged cellular polymer so that the electrically conductive layer forms a second cover layer, the second side being opposite from the first side; wherein a pressure load on the internally-charged cellular polymer at a pressure point causes a charge from the internally-charged cellular polymer to be discharged as currents along the at least one electrical resistance layer; wherein the measurement and evaluation circuit comprises a respective current measuring device in the region of each electric connection so that the location coordinates of any pressure point within the at least one electric resistance layer can be calculated using a ratio of the respective currents at the at least three electric connections; wherein the internally-charged cellular polymer is continuous, wherein the at least one electric resistance layer is applied to the internally-charged cellular polymer to be disposed continuously on the internally-charged cellular polymer such that the sensor field is formed to be continuous; and wherein a voltage condition occurs between the first cover layer and the second cover layer during the occurrence of the charge at the pressure point.