Patent ID: 8587430

Claim:
An active logistical tag for cooperation with cargo elements, said tag comprising: a housing compatible for attachment of said tag to said cargo a sensor section comprising: an electromagnetic radiation sensor comprising an amplifier and adapted to sense logistical prompts due to incident electromagnetic radiation; a motion sensor adapted to sense logistical prompts due to motion of the tag; and a static magnetic field sensor adapted to sense logistical prompts due to the tag being within a static magnetic field, a transmitter section adapted to transmit logistical information to a reader; and a controller in communication with the sensor section and the transmitter section, the controller configured to cause the transmitter section to transmit beacon signals in response to sensing, by the magnetic field detector, that the tag is within a static magnetic field; wherein in the event that the electromagnetic radiation sensor previously sensed a logistical prompt with an identification of a particular exciting low frequency transmitter, and a further logistical prompt is sensed by one or both of the motion sensor and the static magnetic field sensor, the controller is adapted to cause the transmitter section to transmit logistical information that includes an identification of the particular low frequency transmitter.