Patent ID: 8933705
Filing Date: 2015-01-13
Classification: G01D,G01N,G01R,G01V,G06F

Abstract:
1. A system comprising an electronic circuit with a plurality of connections coupled with a plurality of sensor elements, wherein each sensor element of the plurality of sensor elements comprises a transmitting electrode and a compensation electrode which are associated only with one sensor element, and a reception electrode that can be associated with more than one sensor element, wherein for each sensor element the compensation electrode being capacitively coupleable with the reception electrode, wherein the compensation electrode being arranged between the transmitting electrode and the reception electrode of the sensor element and wherein an alternating electrical field emitted at the sensor element forms an observation area of the sensor element; and wherein the electronic circuit being configured to generate for each sensor element first and second transmission signals fed to the transmitting electrode and the compensation electrode of each sensor elements, respectively to form an electric alternating field at the sensor elements by a first alternating electric field emitted at the transmitting electrode and by a second alternating electric field emitted at the compensation electrode each received at the reception electrode and to detect the presence of an object in at least one observation area of the sensor elements, wherein the sensor elements are distinguished from each other by multiplexing.