TAMPER PROTECTION SYSTEM FOR PREVENTING THEFT OF CARGO

摘要

A tamper protection system (1) for preventing theft of cargo comprising a flexible cover sheet (3) for covering said cargo ; a first set of electrically conductive wires (5) distributed along the flexible cover sheet; and a measurement and processing circuitry (6). The measurement and processing circuitry is configured to measure a first measured value (V1) indicative of a first compound electrical resistance (R1) of the first set of electrically conductive wires; determine a first difference (&Dgr;V1) between the first measured value and a first reference value (V1ref); and if the first difference is below a predetermined first threshold value, adjust the first reference value based on the first measured value; otherwise, provide a signal indicative of the first threshold value being exceeded. The tamper protection system in accordance with the present invention hence provides the ability to distinguish between conditions justifying triggering of an alert and conditions falsely giving such an indication.