Patent ID: 7825802

Claim:
An identification system, in particular, for a transport system, a means of transportation, and/or a freight conveyance system, or to monitor persons, comprising at least one stationary and at least one mobile transmission unit which are each provided with an antenna which during the transmission of data are coupled to each other inductively or by an electric field, wherein: at least one of the antennas is designed or arranged such that during mutual displacement of the coupled antennas a directionally dependent modulation of the transmitted signals occurs, in at least one of the transmission units a demodulation unit, optionally provided with a processor, is provided by which the direction-dependently modulated signals are able to be demodulated, and the direction of motion and/or speed of motion and/or acceleration is able to be determined, the stationary transmission unit and the mobile transmission unit are structured such that, while the antennas are coupled and during the mutual displacement of the coupled antennas, signals are transmitted from the stationary to the mobile transmission unit, or the signals are transmitted from the mobile to the stationary transmission unit, the signals are direction-dependently modulated by at least one of the antennas, and the signals are demodulated in one of the mobile transmission unit or the stationary transmission unit that received the signals, after which the direction of motion and/or speed of motion is able to be determined based on the demodulated signals, and the identification system is structured such that the demodulated signals are compared with signal patterns which are characteristic of the directions of motion, or at least one fixed threshold value is provided, or based on the received signals at least one variable threshold value is generated that is used to determine whether the first or second signal half lies above the threshold value.