Abstract: 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.

Abstract: The invention relates to capacitive ultrasonic transducer comprising 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 generated is subjected to tensile stress in the planar direction.

Abstract: A communication station (1) and a transponder (2) are designed in such a way that an inventorizing operation can be performed using various memory areas (36, 37, 38, 39, 40), which are provided in an addressable memory (35) of the transponder (2), and in which different identification data (UIDDATA, USERDATA) is stored.

Abstract: 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.

Abstract: A process for continuous measurement of a dynamic fluid consumption, particularly fuel consumption, uses a continuously working flow rate sensor (7) with variable pressure drop, preferably a mass flow sensor, whereby the pressure downstream of the flow rate sensor (7) is determined for controlling the transport of fluid. In order to make a continuous, precise, and also chronologically highly resolved measurement of consumption and the highly dynamic determination of the flow rate value possible with a design that is as simple as possible, at least at one point in time, the pressure directly upstream of the flow rate sensor (7), the difference of the two pressure values is also determined, and based on this difference, a value for the flow rate of the fluid is determined.

Abstract: A description is given of a method of transferring a first electronic data carrier (1, 10) of a first system (A) to a second system (B), wherein there is stored on the first data carrier (1, 10) an identification (ID1) and a password (PW1), by means of which password (PW1) access to the first data carrier (1, 10) is secured. For transferring a password (PWA, PWB) valid in one system (A, B) between the two systems (A, B), a second electronic data carrier (20) or a mobile device is provided, on which the password (PWA, PWB) valid in the system (A, B) is stored. In one particular embodiment, the password protection of the first data carrier (1, 10) is deactivated, if no second data carrier (20) is available, in order to allow the transfer of the first electronic data carrier (1, 10) from the first system (A) to the second system (B) at a later point in time.

Abstract: A communication station (1) and a transponder (2) are designed in such a way that an inventorizing operation can be performed using various memory areas (36, 37, 38, 39, 40), which are provided in an addressable memory (35) of the transponder (2), and in which different identification data (UIDDATA, USERDATA) is stored.

Abstract: Using a method of recognizing whether a transponder (2) designed for communicating with a communication station (1) belongs to one of at least two groups (GR1, GR2, GR3, GRn) of transponders (2), firstly, for each group (GR1, GR2, GR3, GRn) of transponders (2), a check data block (CRC1, CRC2, CRC3, CRCn) that is significant for the group (GR1, GR2, GR3, GRn) of transponders (2) is generated, and, secondly, the data from the check data block (CRC1, CRC2, CRC3, CRCn) that is significant for the group (GR1, GR2, GR3, GRn) of transponders (2) is evaluated for the recognition of whether the transponder (2) belongs to a group (GR1, GR2, GR3, GRn) of transponders (2).

Abstract: A communication station (1) and a transponder (2) are designed in such a way that an inventorizing operation can be performed using various memory areas (36, 37, 38, 39, 40), which are provided in an addressable memory (35) of the transponder (2), and in which different identification data (UIDDATA, USERDATA) is stored.

Abstract: A transponder (10) which is combined with a product and contains a product code which is significant for the product can be set to a first safety state when the product undergoes a transfer from a first product location area to a second product location area, via a safety state activation zone which includes a communication station, and can be set to a second safety state if the transponder has been set to the first safety state. A transponder (10) set to the second safety state can be permanently deactivated.

Abstract: A module (2) for a data carrier (1) includes an integrated circuit device (9) and transmission means (10), and the module (2) can be tested with the aid of test means (19) during a test operation, which test means (19) can generate a test-result signal (TRS2, TRS3) in dependence on a test result thus determined, indication means (22), which are electrically switchable to a given indication mode (“1”, “0”) in dependence on the test-result signal (TRS2, TRS3), which indication means (22) are advantageously arranged directly on the module (2).

Abstract: In a method and a system (1) 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 (9) and separately therefrom to a right transmission coil (10), and it is determined by detection means (15, 16) 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+1), V(Ik+1) of the changed (reduced) current strengths (Ii+1, Ik+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+1), V(Ik+1).

Abstract: A data carrier (1) for contactless communication with a communication station (2) has an integrated circuit (7) and has a direct voltage generation circuit (20), and has detection means (28) for detecting a temperature prevailing in the data carrier (1) and in the integrated circuit (7), with the aid of which detection means (28) 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 (1) and in the integrated circuit (7).

Abstract: A communication station (1) and a transponder (2) are designed in such a way that an inventorizing operation can be performed using various memory areas (36, 37, 38, 39, 40), which are provided in an addressable memory (35) of the transponder (2), and in which different identification data (UIDDATA, USERDATA) is stored.

Abstract: A data carrier (1) for contactless communication with a communication station (2) has an integrated circuit (7) and has a direct voltage generation circuit (20), and has detection means (28) for detecting a temperature prevailing in the data carrier (1) and in the integrated circuit (7), with the aid of which detection means (28) 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 (1) and in the integrated circuit (7).

Abstract: In a method and a system (1) for determining the position (d) of a wanted object (BKn) fitted with a transponder (TRn), scanning signals (INTnle, INTnri) with current strengths (Ile, Iri) changed (reduced) in steps and starting from a starting value (maximum value) are supplied to a left transmission coil (9) and separately therefrom to a right transmission coil (10), and it is determined by detection means (15, 16) 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+1), V(Ik+1)] of the changed (reduced) current strengths (Ii+1, Ik+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+1), V(Ik+1)].

Abstract: A module (2) for a data carrier (1) includes an integrated circuit device (9) and transmission means (10), and the module (2) can be tested with the aid of test means (19) during a test operation, which test means (19) can generate a test-result signal (TRS2, TRS3) in dependence on a test result thus determined, indication means (22), which are electrically switchable to a given indication mode (“1”, “0”) in dependence on the test-result signal (TRS2, TRS3), which indication means (22) are advantageously arranged directly on the module (2).