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    • 1. 发明授权
    • Theft protection system particularly for shop areas
    • 防盗系统特别适用于店面
    • US4635041A
    • 1987-01-06
    • US690497
    • 1984-12-10
    • Mogens MaimannBent Svendsen
    • Mogens MaimannBent Svendsen
    • G08B13/24
    • G08B13/2488
    • In a theft protection system, particularly for a shop area, several exit passages with individual antenna systems are surveyed by means of a single transmitter for the transmission of electromagnetic interrogation signals and a single receiver for reception of resonance signals generated by unauthorized removal of a good, the antenna system for all the exit passages being connected to the transmitter and the receiver through multiplexers. A central control unit controls the multiplexers so as to actuate the antenna systems in successive time frames, whereby only one antenna system is made operative at a time. With each exit passage is associated an alarm device which is only activated for an alarm release from an alarm-actuating circuit connected to the control unit in case of compliance with at least one positive and one negative alarm criterion.
    • PCT No.PCT / DK84 / 00027 Sec。 371日期1984年12月11日第 102(e)日期1984年12月11日PCT提交1984年4月10日PCT公布。 出版物WO84 / 04191 日期为1984年10月25日。在防盗系统中,特别是对于商店区域,具有单个天线系统的几个出口通道通过用于传输电磁询问信号的单个发射器和用于接收谐振信号的单个接收器进行测量 通过未经授权的拆卸而产生的,用于所有出口通道的天线系统通过多路复用器连接到发射机和接收机。 中央控制单元控制多路复用器以便在连续的时间帧内致动天线系统,由此一次只能操作一个天线系统。 每个出口通道相关联的报警装置仅在符合至少一个正和负的报警标准的情况下才被激活用于从连接到控制单元的报警启动电路的报警释放。