| 摘要 |
The invention relates to a shape-changeable portion that is intended to be at least partially arranged inside the neck of a container so as to seal same. Said portion is capable of resiliently changing shape when inserted in the neck. Said portion includes a first end, that is intended to be oriented towards the inside of the container, and a radiofrequency identification tag (11). Said device includes at least one piezoelectric component (10) electrically connected to the tag (11) and arranged inside said shape-changeable portion (1) within a blind recess on the first end side, said piezoelectric component generating an electrical voltage caused by expansion of the shape-changeable portion containing the piezoelectric component, when the shape-changeable portion is removed from the neck. Said electrical voltage is capable of causing the radiofrequency identification tag to change state. |
