System for concealed serialization utilizing a soft magnetic antitheft
element
    2.
    发明授权
    System for concealed serialization utilizing a soft magnetic antitheft element 失效
    使用软磁防盗元件进行隐蔽串联的系统

    公开(公告)号:US5736929A

    公开(公告)日:1998-04-07

    申请号:US660261

    申请日:1996-06-07

    摘要: The invention relates to a special type of magnetic tag that serves both as an identifier of the article to which it is attached and as an antitheft device. Identification comes about through the use of an array of individual magnetic elements that are closely spaced, preferably along and perpendicular to an amorphous wire or strip. The wire or strip forms an integral part of the identification array and can be used as an anti-theft device to trigger an alarm when activated by an external field from a magnetic gate. The array may be personalized (coded) by leaving out elements of the array or by driving selected elements to saturation while others remain demagnetized. The elements can also be in the form of a double array to constitute `l`s and `0`s to form a code. Reading of the elements (code) is accomplished with a special reading head consisting of one or more small magnetic circuits coupled to one or more pickup loops utilizing, in some cases, the Matteucci effect.

    摘要翻译: 本发明涉及一种特殊类型的磁性标签,其既用作与其连接的物品的标识符,也用作防盗装置。 通过使用紧密间隔的单独磁性元件的阵列,优选地沿着并垂直于非晶线或条带来进行识别。 线或条形成识别阵列的组成部分,并且可以用作防盗装置,以在由磁性门的外部场激活时触发警报。 阵列可以通过排除阵列的元件或通过将所选择的元件驱动到饱和而另一些保持去磁来个性化(编码)。 元素也可以是双数组的形式,以构成“l”和“0”来形成代码。 元件(代码)的读取是通过一种特殊的读取头完成的,该读取头由一个或多个小的磁路组成,该小型磁路耦合到一个或多个拾取环路,在某些情况下,利用Matteucci效应。

    Magnetoresistive sensor with magnetostatic coupling to obtain opposite alignment of magnetic regions
    3.
    发明授权
    Magnetoresistive sensor with magnetostatic coupling to obtain opposite alignment of magnetic regions 失效
    具有静磁耦合的磁阻传感器以获得磁区的相反对准

    公开(公告)号:US06510031B1

    公开(公告)日:2003-01-21

    申请号:US08414865

    申请日:1995-03-31

    IPC分类号: G11B539

    摘要: A magnetic field sensor incorporates a plurality of magnetic stripes spaced apart on the surface of a substrate such that the stray magnetic fields at the ends of the magnetic stripes are magnetostatically coupled and the magnetic stripes are magnetized respectively in alternating directions, nonmagnetic conductive material positioned in the spaces between the magnetic stripes and electrodes for passing current crosswise through the plurality of magnetic stripes to detect a change in resistance by the giant magnetoresistive effect (MGR). The invention overcomes the problem of detecting low magnetic fields since the magnetic fields required to saturate magnetic stripes depends on the magnetostatic coupling which in turn can be controlled by the geometry and position of the magnetic stripes in the sensor.

    摘要翻译: 磁场传感器包含在衬底的表面上间隔开的多个磁条,使得磁条端部处的杂散磁场被磁静耦合,并且磁条分别在交替方向被磁化,非磁性导电材料位于 磁条和电极之间的空间,用于使电流交叉穿过多个磁条,以通过巨磁阻效应(MGR)检测电阻的变化。 本发明克服了检测低磁场的问题,因为使磁条饱和所需的磁场取决于静磁耦合,静磁耦合又可以由传感器中的磁条的几何形状和位置来控制。

    Modulation of the resonant frequency of a circuit using an energy field
    5.
    发明授权
    Modulation of the resonant frequency of a circuit using an energy field 有权
    使用能量场调制电路的谐振频率

    公开(公告)号:US07123129B1

    公开(公告)日:2006-10-17

    申请号:US10391515

    申请日:2003-03-18

    IPC分类号: H04Q5/22

    CPC分类号: G06K19/0723 G06K19/07749

    摘要: A transponder has a resonant RLC circuit with one or more electromagnetic energy storage components that vary in response to an externally applied modulating energy field. In addition to the externally modulating energy field, a base station transmits a carrier signal with a frequency essentially the same as the quiescent resonant frequency of the RLC circuit. As the component(s) vary, the resonant frequency of the RLC circuit changes, modulating the carrier signal with the external modulating energy field. Effects of the modulation are detected by the base station. Information (e.g., the presence of a tag) is obtained by receiving and demodulating the modulated signal at the base station. One or more or the circuit elements (e.g, different preferred embodiments of one or more capacitors, inductors, and resistors) can be varied (e.g. mechanically) to modulate the carrier signal. This allows the resonant circuit to modulate the carrier signal with multiple modulation frequencies to encode multiple bits of information on the carrier.

    摘要翻译: 应答器具有谐振RLC电路,其具有响应于外部施加的调制能量场而变化的一个或多个电磁能量存储部件。 除了外部调制能量场之外,基站发送具有与RLC电路的静态谐振频率基本相同的频率的载波信号。 当组件变化时,RLC电路的谐振频率改变,用外部调制能量场调制载波信号。 调制的影响由基站检测。 通过在基站接收和解调调制信号来获得信息(例如,标签的存在)。 一个或多个或电路元件(例如,一个或多个电容器,电感器和电阻器的不同优选实施例)可以改变(例如机械地)以调制载波信号。 这允许谐振电路以多个调制频率来调制载波信号,以对载波上的多个信息位进行编码。

    Magnetoresistive sensor with magnetostatic coupling of magnetic regions
    7.
    发明授权
    Magnetoresistive sensor with magnetostatic coupling of magnetic regions 失效
    具有静磁耦合磁阻的磁阻传感器

    公开(公告)号:US06775109B2

    公开(公告)日:2004-08-10

    申请号:US10193497

    申请日:2002-07-11

    IPC分类号: G11B539

    摘要: A magnetic field sensor is described incorporating a plurality of magnetic stripes spaced apart on the surface of a substrate such that the stray magnetic fields at the ends of the magnetic stripes are magnetostatically coupled and the magnetic stripes are magnetized respectively in alternating directions, nonmagnetic conductive material positioned in the spaces between the magnetic stripes and electrodes for passing current crosswise through the plurality of magnetic stripes to detect a change in resistance by the giant magnetoresistive effect (MGR). The invention overcomes the problem of detecting low magnetic fields since the magnetic fields required to saturate magnetic stripes depends on the magnetostatic coupling which in turn can be controlled by the geometry and position of the magnetic stripes in the sensor.

    摘要翻译: 磁场传感器被描述为包括在衬底的表面上间隔开的多个磁条,使得磁条端部处的杂散磁场被磁静耦合并且磁条分别在交替方向被磁化,非磁性导电材料 位于磁条和电极之间的空间中,用于使电流横穿多个磁条,以通过巨磁阻效应(MGR)检测电阻的变化。 本发明克服了检测低磁场的问题,因为使磁条饱和所需的磁场取决于静磁耦合,静磁耦合又可以由传感器中的磁条的几何形状和位置来控制。

    Modulation of the resonant frequency of a circuit using an energy field
    9.
    发明授权
    Modulation of the resonant frequency of a circuit using an energy field 有权
    使用能量场调制电路的谐振频率

    公开(公告)号:US06535108B1

    公开(公告)日:2003-03-18

    申请号:US09136157

    申请日:1998-08-18

    IPC分类号: H04Q522

    摘要: A transponder has a resonant RLC circuit with one or more electromagnetic energy storage components that vary in response to an externally applied modulating energy field. In addition to the externally modulating energy field, a base station transmits a carrier signal with a frequency essentially the same as the quiescent resonant frequency of the RLC circuit. As the component(s) vary, the resonant frequency of the RLC circuit changes, modulating the carrier signal with the external modulating energy field. Effects of the modulation are detected by the base station. Information (e.g., the presence of a tag) is obtained by receiving and demodulating the modulated signal at the base station. One or more of the circuit elements (e.g. different preferred embodiments of one or more capacitors, inductors, and resistors) can be varied (e.g. mechanically) to modulate the carrier signal. This allows the resonant circuit to modulate the carrier signal with multiple modulation frequencies to encode multiple bits of information on the carrier.

    摘要翻译: 应答器具有谐振RLC电路,其具有响应于外部施加的调制能量场而变化的一个或多个电磁能量存储部件。 除了外部调制能量场之外,基站发送具有与RLC电路的静态谐振频率基本相同的频率的载波信号。 当组件变化时,RLC电路的谐振频率改变,用外部调制能量场调制载波信号。 调制的影响由基站检测。 通过在基站接收和解调调制信号来获得信息(例如,标签的存在)。 可以改变一个或多个电路元件(例如一个或多个电容器,电感器和电阻器的不同优选实施例)(例如机械地)来调制载波信号。 这允许谐振电路以多个调制频率来调制载波信号,以对载波上的多个信息位进行编码。

    Circuit antitheft and disabling mechanism
    10.
    发明授权
    Circuit antitheft and disabling mechanism 失效
    电路防盗和禁用机制

    公开(公告)号:US5739754A

    公开(公告)日:1998-04-14

    申请号:US681742

    申请日:1996-07-29

    IPC分类号: G08B13/14

    CPC分类号: G08B13/1409

    摘要: The present invention is a magnetic sensor used with one or more frequency band pass filters and a logic circuit that produces a ("critical") signal that is used for enabling and disabling an external electronic circuit, e.g. a computer circuit. The magnetic sensor produces a signal when excited by an externally applied alternating current (ac) magnetic field. The external ac magnetic field can comprise one or more frequencies, each of which induces an electrical signal at the respective frequency in the sensor. Depending on the linearity of the sensor, one or more harmonic frequencies of the signal frequencies can also be induced in the sensor. One or more bandpass filters is connected to the magnetic sensor and each of the bandpass filters is tuned to filter the signal to select filtered signals, from the output of the sensor. A logic circuit is activated by one or more of the filtered signals or a combination of one or more of the signal frequencies. When the logic circuit is activated, a critical signal is applied to an electronic circuit to enable or disable the external electronic circuit.

    摘要翻译: 本发明是与一个或多个频带通滤波器一起使用的磁传感器和产生用于启用和禁用外部电子电路的(“临界”)信号的逻辑电路,例如, 一个电脑电路。 当由外部施加的交流(ac)磁场激励时,磁传感器产生信号。 外部交流磁场可以包括一个或多个频率,每个频率在传感器中以相应的频率感应电信号。 根据传感器的线性度,也可以在传感器中感应出信号频率的一个或多个谐波频率。 一个或多个带通滤波器连接到磁传感器,并且每个带通滤波器被调谐以对信号进行滤波以从传感器的输出中选择滤波信号。 逻辑电路由一个或多个滤波信号或一个或多个信号频率的组合激活。 当逻辑电路被激活时,关键信号被施加到电子电路以启用或禁用外部电子电路。