A SECURITY SYSTEM
申请公布号:WO9427117(A1)
申请号:WO1994GB00992
申请日期:1994.05.09
申请公布日期:1994.11.24
发明人:VAHRMAN, RICHARD
分类号:G01D5/48;G06K7/00;G06K19/07
主分类号:G01D5/48
摘要:A security system for testing for exposure of the contents (4) of a container (3) to a predetermined physical stimulus. The system has a sensor (1), for example a pressure sensor, and a tag (2) in the form of a r.f. transponder which are both placed within the container (3). The transponder transmits data representative of the ouptut state of the sensor (1) in response to an interrogation signal for a transceiver (5) outside the container (3), without the container having to be opened.