| 摘要 |
A hidden security device for a container of cargo transportation includes a case provided with an electronic processing unit; a tightly-seized device, including a plate, extending from the case, on which a displacement sensor communicating with the electronic processing unit is provided at a predetermined place; and a tightly-seized part, perpendicularly extending from the plate and having a flexing end; and an antenna, communicating with the electronic processing unit and extending out from the case to the flexing end of the tightly-seized part. The present security device can accurately record the time and frequency of opening the door plates of the container, and meanwhile it is disposed on the inner side of the door plates, and is readily concealed.
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