Koninklijke Philips Corporation N.v.

Nxp B.v.

Avl List Gmbh

Koninklijke Phillips Electronics N.v.

Michael Cernusca

Franz Amtmann

Peter Thueringer

Peter Raggam

Stefan Posch

Michael Wiesinger

Christian Scherabon

Josef Preishuber-Pfluegl

Thomas Burger

Katarzyna Kudlaty

Dirk Morgenroth

A capacitive ultrasonic transducer includes a sensor head having a back plate, the structured front side of which is provided with an insulation layer, and the back side of which is provided with an electrode. In order to achieve an improved construction by means of which increased temperature resistance up to several hundred degrees Celsius can be achieved even in strongly oxidizing and reducing media, the membrane provided as a sound generator is subjected to tensile stress in a planar direction.

Capacitive ultrasonic transducer

A communication station () and a transponder () are designed in such a way that an inventorizing operation can be performed using various memory areas (), which are provided in an addressable memory () of the transponder (), and in which different identification data (UIDDATA, USERDATA) is stored.

Communication station for inventorizing transponders by means of selectable memory areas of the transponders

A method recognizes whether a transponder designed for communicating with a communication station belongs to one of at least two groups of transponders. First, for each group of transponders, a check data block that is significant for the group of transponders is generated. Then, the data from the check data block that is significant for the group of transponders is evaluated for the recognition of whether the transponder belongs to the group of transponders.

Method of recognizing whether a transponder belongs to a group of transponders

A module ( ) for a data carrier ( ) includes an integrated circuit device ( ) and transmission means ( ), and the module ( ) can be tested with the aid of test means ( ) during a test operation, which test means ( ) can generate a test-result signal (TRS , TRS ) in dependence on a test result thus determined, indication means ( ), which are electrically switchable to a given indication mode (&ldquo;1&rdquo;, &ldquo;0&rdquo;) in dependence on the test-result signal (TRS , TRS ), which indication means ( ) are advantageously arranged directly on the module ( ).

Data carrier module having indication means for indicating the result of a test operation

In a method and a system ( ) for determining a position (d) of a wanted object (BKn) fitted with a transponder (TRn), scanning signals (INTnle, INTnri) with current strengths (Ire, Iri) changed (reduced) in steps and starting from a starting value (maximum value) are supplied to a left transmission coil ( ) and separately therefrom to a right transmission coil ( ), and it is determined by detection means ( ) when the transponder (TRn) associated with the wanted object (BKn) has changed its behavior between delivery and non-delivery of its response signal (RESn), whereupon those values V(Ii&plus;1), V(Ik&plus;1) of the changed (reduced) current strengths (Ii&plus;1, Ik&plus;1) are determined at which the transponder (TRn) has changed its behavior between delivery and non-delivery of its response signal (RESn), and the position (d) of the wanted object (BKn) is subsequently determined from said values V(Ii&plus;1), V(Ik&plus;1).

Method and system for determining the position of a wanted object which is positioned in a row of objects and is provided with a transponder

A data carrier ( ) for contactless communication with a communication station ( ) has an integrated circuit ( ) and has a direct voltage generation circuit ( ), and has detection means ( ) for detecting a temperature prevailing in the data carrier ( ) and in the integrated circuit ( ), with the aid of which detection means ( ) a representation signal (RS) representative of the prevailing temperature can be generated, which representation signal causes an initiation of a change of the temperature in the data carrier ( ) and in the integrated circuit ( ).

Growing community of inventors

Judendorf-Strassengel, Austria

Michael Cernusca