Abstract: Method and system for remotely detecting a vehicle positioned in at least one of several possible adjacent lanes, which lanes are arranged one after the other in a lateral direction, wherein reading antennas are arranged to read received electro-magnetic signals received from vehicles, at different lateral reading locations. The method involves measuring an electromagnetic signal received from the vehicle by several of said reading antennas; determining, for each of said several reading antennas, a respective received electromagnetic signal strength; determining, based upon knowledge about a respective relative geometric position and the said respective determined signal strength of each of the said several reading antennas, a geometric center of gravity for a first signal strength function, which is the received signal strength as a function of physical lateral position; and detecting the vehicle as present in a lane in which the said geometric center of gravity lies.

Abstract: A method of determining the position of a transponder in relation to a communicator, wherein the transponder (9) can be read by a communicator (11) which is adapted to send an inquiry signal to the transponder, wherein the transponder (9) is adapted to answer the inquiry signal and therewith transfer information from a memory in the transponder and wherein the communicator (11) is connected to a principal data system (16) and is adapted to receive the information. The method is characterized by connecting the communicator (11) to an envelope detector (15) which is caused to detect the envelope of the signal received from the transponder (9); and by determining the relative position between the transponder (9) and the communicator (11) from the envelope.

Abstract: An identification device comprising a transponder (2) that can be read by means of a transmitter/receiver unit (11) arranged to transmit an enquiry signal (13) to the transponder, where the transponder is arranged to reflect (14) the enquiry signal and in this way to modulate the enquiry signal with information stored in a memory in the transponder and where the transmitter/receiver unit (11) is arranged to receive the modulated enquiry signal, which transponder (2) is integrated into a mobile telephone (8) and which transponder (2) is connected to a source (6) of power. The invention is characterised in that the said source (6) of power is constituted by the source of power of the mobile telephone used to power the clock of the mobile telephone (8).

Abstract: A method for granting access to restricted areas such as computers, doors, vehicles, or other areas to which access by a user is controlled. An access code is transmitted from a central computer via radio waves to a user's radio terminal, such as a mobile telephone. The radio terminal transmits the access code over a short-range radio link to a communication device at the restricted area. The communication device transmits the access code to the central computer, which compares the received code with the code that the computer transmitted to the radio terminal to determine whether access should be granted.

Abstract: A method and apparatus pertaining to identification systems in which a transponder reflects an inquiry signal from a communicator. The reflected signal is modulated with data that can be read by the communicator, and the data-carrying modulation includes a check sum calculated on the basis of data stored in the transponder memory. The transponder check sum is stored permanently in the transponder memory. A calculated check sum is calculated in the communicator based upon the transponder data included in the reflected inquiry signal, and the calculated check sum is compared with the check sum stored in the transponder to determine whether the transponder identifies an authorized person or object that is to be identified.

Abstract: A seal for sealing goods in goods containers, such as freight containers, freight cars, trucks, and the like. The seal interacts with a door or other hatch that can be opened in order to seal it against unauthorized opening. The seal is activated when the goods container is loaded and is broken when the goods in the goods container are unloaded. The seal includes a transponder that includes a memory and that communicates with a communicator for the reading of information stored in the transponder memory. The seal is placed into an active mode during the sealing operation, and information as to the time when the seal is opened is stored in the transponder memory. The opening time information is subsequently read by the communicator.

Abstract: A method of transmitting geographically governed information to automotive vehicles or to individuals, based upon the location of the vehicles or individuals. The exact or approximate position of the vehicle or the individual is determined in relation to permanently spaced units for radio communication between those units and a vehicle-carried or an individual-carried communications unit. A computer and associated database contains information that includes different data relevant to different geographical areas. The computer sends relevant information to a receiving unit in each and every one of those vehicles or individuals whose position has been determined, and in accordance with the geographical area in which the vehicle or the individual is located.

Abstract: The present invention relates to a method for carrying out passage and authorisation checks of objects, such as persons or vehicles, with the aid of an identification system that uses radio frequencies, so-called RFID (Radio Frequency Identification) or corresponding radio links, said system including identification tags (ID-tags) (1) and communicators (2), wherein each ID-tag is designed to receive a signal sent by a communicator (2) and to reflect or re-send said signal in a modulated state, wherein the communicators are connected to central computer (7) and a database (8).

Abstract: A system that includes a mobile communications unit, wherein an identification module is added between a radio part and an antenna in a mobile telephone that includes a Bluetooth function. The identification module includes a mixer for transposing identification messages from identification devices in a 2.45 GHz RFID system of the backscatter type, to a baseband for further processing in the computer part of the unit and optionally communication with a superordinate system by a standard call channel or a Bluetooth channel. The unit can also send information to identification devices for alerting and/or transmitting data. Modulation and encoding can be effected in accordance with the Bluetooth standard, thereby enabling the mixer to be included as an integral part of a standard Bluetooth radio.

Abstract: A transponder for automatic identification and corresponding systems. The transponder may include patch antennas for reflecting transponder data as information sidebands of a microwave signal received from a reading unit, for example. The antennas may by parallel to, but oppositely directed from one another. Additionally the antennas may act against at least one intermediate earth plane, and are linearly polarized so that their polarization direction is rotated through 90° in relation thereto. In this arrangement, the transponder may be read from a short distance and from both sides of the antennas, and communication with the transponder may not be disturbed by the presence of a rearwardly-located reflection plane.