| 摘要 |
<p>The invention relates to security devices. In particular, but not exclusively, the invention relates to security devices comprising a tag to be worn by persons including babies, patients and other objects whose movements are to be monitored. A tamper-proof security device comprises a tag and a strap, the device comprising means for attaching the strap to the tag, such that the strap forms a loop, the strap further comprising at least one electrical conductor disposed along at least a portion of a length of the strap, the means for attaching the strap to the tag further comprising means for making electrical contact between the tag and the at least one electrical conductor of the strap such that an electrical flow path is provided through said at least one conductor between a plurality of electrical contacts of the tag, and wherein the electrical conductor comprises a conducting polymer material.</p> |
