| 摘要 |
<p>A device and a method for determining the position at least one mobile unit (2) provided with an identity code (7), the unit (2) comprises a receiver (4) for receiving radio signals, from which signals the position of the unit (2) can be calculated, a transmitter (3) arranged to send information to a central unit (1), where said transmitter (3) is arranged to read the information form said receiver (4) and send information regarding at least the position and the identity code (7) of the mobile unit (2) to the central unit (1). The device is provided with an apparatus for altitude measurements (5), and when the receiver (4) is outside the area of radio coverage, it sends information to said central unit (1) regarding the identity code (7) of the mobile unit (2), its latest stated position in the horizontal plane, and its vertical position, given by the apparatus for altitude measurements (5). The invention also comprises a vehicle, a container or other equipment, provided with such a device.</p> |
