公开(公告)号：US5861809A

公开(公告)日：1999-01-19

申请号：US934979

申请日：1997-09-22

申请人： Eric Alan Eckstein ,  Lawrence Appalucci ,  Gary Thomas Mazoki

发明人： Eric Alan Eckstein ,  Lawrence Appalucci ,  Gary Thomas Mazoki

IPC分类号： G06K19/077 ,  G06K19/07 ,  G08B13/24 ,  H01Q7/00 ,  G08B13/187 ,  H05K3/32

CPC分类号： G08B13/242 ,  G08B13/2431 ,  G08B13/2442 ,  Y10T29/49002 ,  Y10T29/49107 ,  Y10T29/49149

摘要： A resonant tag used with an electronic article surveillance system for detecting the presence of the tag within a surveilled area utilizing electromagnetic energy at a frequency within a predetermined detection frequency range includes a resonant circuit capable of resonating at a frequency within the predetermined detection frequency range. The resonant circuit includes an inductor formed at least in part on a surface of a dielectric substrate of the tag. The inductor is formed with a discontinuity or gap, causing an electrical open circuit. The open circuit is closed with a fuse secured proximate to the gap and wirebonded to the portions of the inductor proximate to the gap. The fuse is melted by a current greater than a predetermined level flowing therethrough. Such a high current may be induced in the inductor by an external electromagnetic field. Melting of the fuse causes an open circuit condition, which alters the frequency at which the tag resonates.

摘要翻译： 与电子物品监视系统一起使用的共振标签用于利用在预定检测频率范围内的频率的电磁能量来检测监视区域内的标签的存在，包括能够以预定检测频率范围内的频率谐振的谐振电路。 谐振电路包括至少部分地形成在标签的电介质基板的表面上的电感器。 电感器形成有不连续或间隙，导致电开路。 开路被封闭，保险丝固定在靠近间隙处并且引线接合到靠近间隙的电感器的部分。 保险丝由大于流过其中的预定水平的电流熔化。 可以通过外部电磁场在电感器中感应出高电流。 保险丝的熔化导致开路状态，这改变了标签谐振的频率。