CN2290084Y - 全方位防窃感应器 - Google Patents

全方位防窃感应器 Download PDF

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Publication number
CN2290084Y
CN2290084Y CN 96224155 CN96224155U CN2290084Y CN 2290084 Y CN2290084 Y CN 2290084Y CN 96224155 CN96224155 CN 96224155 CN 96224155 U CN96224155 U CN 96224155U CN 2290084 Y CN2290084 Y CN 2290084Y
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inductor
theft
utility
model
circuit
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CN 96224155
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叶敬秀
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Ye Jingxiu
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Abstract

本实用新型公开了一种全方位防窃感应器,由接收、半频电路及发射电路组成,接收和发射电路中的耦合磁棒具有弯折结构。较现有接收电路的直段式磁棒耦合能量高,使感应器灵敏度提高,避免了漏报现象的发生,适宜超市或开架(仓储式)商场商品防窃使用。

Description

全方位防窃感应器
本实用新型属于防窃设备，尤其是开架式商场商品防窃设备制造领域。
在采用半频方式的现代化商场的“商用电子防窃系统”(EAS)中，将钮扣大小的防窃感应器(又称无源电子标牌)配置在每一件受保护的商品上面，并在出口附近设置一工作主机，该工作主机以f0频率发射电波，又以f0/2频率接收电波；无源工作防窃感应的接收部分(接收线圈和藕合磁棒构成)感应到f0波后经其内的半频电路处理成为f0/2的频率并将其发射电路发射出来，反馈回主机。顾客购物缴费时，工作人员用专用工具将防窃器取下；若顾客夹带受保护的商品通过出口，未取下的防窃感应器进入主机探测区，使主机接收到强烈f0/2波而引起相应的谐振，作出报警反映。
但是，目前的防窃感应的接收器的接收部分的藕合磁棒，都做成如图1那样的直段状；图中1为磁棒，2和3分别为接收线圈组件和发射线圈组件。由于当主机和发射天线产生的磁力线垂直穿过磁棒轴线时，藕合能量最小，造成感应器灵敏度降低，对整个系统而言就出现了探测死区，这时，即使有人夹带附有感应器的商品出门，主机也不会产生报警，造成漏报。
本实用新型的目的是设计一种全方位防窃感应器，使之不会出现主机磁力线垂直穿过整个磁棒轴线的状况，消除感应死区，避免漏报发生。
本实用新型的目的是通过如下的设计实现的。
由接收、半频电路及发射电路组成的全方位防窃感应器中，接收和发射电路中的藕合磁棒具有弯折结构。
采用了如上的结构后，主机天线产生的磁力线不可能垂直地穿过整个磁棒的中轴线，使磁棒产生足以报警的藕合能量，消除了感应死角，避免了漏报产生。
附图说明如下。
图1是现有感应的接收部分和接收和发射部分的结构图。
图2是本实用新型实施例的结构图。
图3是本实用新型实施例磁棒的另一种弯折形式。
在图2中可看到，接收和发射电路中的藕合磁棒4具有弯折的结构，在此例中磁棒为V型，当然还可做成其它的弯折形式，例如图3中5的形式。

Claims (2)

1、全方位防窃感应器，由接收、半频电路及发射电路组成，其特征在于，接收和发射电路中的藕合磁棒具有弯折结构。
2、根据权利要求1所述的全方位防窃感应器，其特征在于，所述藕合磁棒具有V形结构。
CN 96224155 1996-12-06 1996-12-06 全方位防窃感应器 Expired - Fee Related CN2290084Y (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 96224155 CN2290084Y (zh) 1996-12-06 1996-12-06 全方位防窃感应器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 96224155 CN2290084Y (zh) 1996-12-06 1996-12-06 全方位防窃感应器

Publications (1)

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CN2290084Y true CN2290084Y (zh) 1998-09-02

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Family Applications (1)

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CN 96224155 Expired - Fee Related CN2290084Y (zh) 1996-12-06 1996-12-06 全方位防窃感应器

Country Status (1)

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CN (1) CN2290084Y (zh)

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