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    MAGNETIC FIELD DETECTOR HAVING A VARIABLE THRESHOLD
    16.
    发明申请
    MAGNETIC FIELD DETECTOR HAVING A VARIABLE THRESHOLD 有权
    具有可变阈值的磁场探测器

    公开(公告)号：US20100231202A1

    公开(公告)日：2010-09-16

    申请号：US12401096

    申请日：2009-03-10

    申请人： P. Karl Scheller ,  Ravi Vig

    发明人： P. Karl Scheller ,  Ravi Vig

    IPC分类号： G01P3/48

    CPC分类号： G01R33/091 ,  G01D5/2448 ,  G01R33/072

    摘要： Apparatus for detecting a passing magnetic article includes a peak detector providing a detector output signal that changes state when the magnetic field signal differs from a magnetic field tracking signal by more than a threshold offset amount. The threshold offset amount is dynamically variable in response to detection of a speed of rotation of the magnetic article and a peak-to-peak signal level of the magnetic field signal.

    摘要翻译： 用于检测通过的磁性制品的装置包括提供检测器输出信号的峰值检测器，当磁场信号与磁场跟踪信号不同于阈值偏移量时，该检测器输出信号改变状态。 响应于磁性物品的旋转速度的检测和磁场信号的峰 - 峰信号电平，阈值偏移量是动态变化的。

    Magnetic field sensors and related techniques that can provide a self-test using signals and related thresholds
    17.
    发明授权
    Magnetic field sensors and related techniques that can provide a self-test using signals and related thresholds 有权
    磁场传感器和相关技术可以使用信号和相关阈值进行自检

    公开(公告)号：US08860404B2

    公开(公告)日：2014-10-14

    申请号：US13526113

    申请日：2012-06-18

    申请人： Daniel S. Dwyer ,  Christine Graham ,  P. Karl Scheller

    发明人： Daniel S. Dwyer ,  Christine Graham ,  P. Karl Scheller

    IPC分类号： G01B7/30

    CPC分类号： G01D5/147 ,  G01R33/072

    摘要： Magnetic field sensor and related techniques can identify passing conditions, failing conditions, and marginal conditions of a sensed object. The magnetic field sensor and techniques can use one or more peak values of a proximity signal representative of proximity of the sensed object, can generate one or more difference values representative of difference between the peak values of the proximity signal and threshold values of a threshold signal proportional to the peak values, can categorize the one or more difference values into a plurality of potential categories, wherein at least one of the plurality of potential categories is representative of a respective passing self-test and wherein another at least one of the plurality of potential categories is representative of a respective marginally passing self-test, can assign category values to the plurality of potential categories, and can communicate at least one of the plurality of category values.

    摘要翻译： 磁场传感器和相关技术可以识别感测对象的通过条件，故障条件和边缘条件。 磁场传感器和技术可以使用表示感测对象的接近度的接近信号的一个或多个峰值，可以产生代表接近信号的峰值与阈值信号的阈值之间的差异的一个或多个差值 与峰值成比例，可以将一个或多个差值分类为多个潜在类别，其中多个潜在类别中的至少一个代表相应的经过自检，并且其中，多个潜在类别中的至少一个 潜在类别代表相应的边缘自我测试，可以将类别值分配给多个潜在类别，并且可以传达多个类别值中的至少一个。

    CIRCUITS AND METHODS FOR GENERATING A THRESHOLD SIGNAL USED IN A MAGNETIC FIELD SENSOR BASED ON A PEAK SIGNAL ASSOCIATED WITH A PRIOR CYCLE OF A MAGNETIC FIELD SIGNAL
    18.
    发明申请
    CIRCUITS AND METHODS FOR GENERATING A THRESHOLD SIGNAL USED IN A MAGNETIC FIELD SENSOR BASED ON A PEAK SIGNAL ASSOCIATED WITH A PRIOR CYCLE OF A MAGNETIC FIELD SIGNAL 有权
    基于与磁场信号的先前周期相关的峰值信号在磁场传感器中产生阈值信号的电路和方法

    公开(公告)号：US20140145711A1

    公开(公告)日：2014-05-29

    申请号：US13685287

    申请日：2012-11-26

    申请人： Eric Burdette ,  James M. Bailey ,  Daniel S. Dwyer ,  Jeff Eagen ,  Glenn A. Forrest ,  Christine Graham ,  Eric Shoemaker ,  P. Karl Scheller

    发明人： Eric Burdette ,  James M. Bailey ,  Daniel S. Dwyer ,  Jeff Eagen ,  Glenn A. Forrest ,  Christine Graham ,  Eric Shoemaker ,  P. Karl Scheller

    IPC分类号： G01B7/14

    CPC分类号： G01B7/14 ,  G01D5/2448 ,  G01P3/488 ,  G01P3/489

    摘要： A circuit to detect a movement of an object includes a magnetic field sensing element for generating a magnetic field signal proportional to a magnetic field associated with the object and a motion detector to generate a motion signal indicative of the movement of the object. The motion detector includes a peak identifying circuit to provide a peak signal and a peak sample selection module that selects a sample associated with one or more prior cycles of a magnetic field signal to generate a selected peak signal. The motion detector further includes a threshold generator to generate a threshold signal as a function of the selected peak signal and a comparator to compare the threshold signal with the magnetic field signal to generate the motion signal. Peak samples from prior magnetic field signal cycles may be averaged for use to establish the threshold signal. A method associated with the circuit is also described.

    摘要翻译： 用于检测物体运动的电路包括用于产生与与物体相关联的磁场成比例的磁场信号的磁场感测元件和运动检测器，以产生指示物体运动的运动信号。 运动检测器包括提供峰值信号的峰值识别电路和峰值采样选择模块，其选择与磁场信号的一个或多个先前循环相关联的采样以产生所选择的峰值信号。 运动检测器还包括阈值产生器，用于根据所选择的峰值信号产生阈值信号;以及比较器，用于将阈值信号与磁场信号进行比较以产生运动信号。 来自先前磁场信号周期的峰值采样可以被平均以用于建立阈值信号。 还描述了与电路相关联的方法。

    DIRECTION DETECTION SENSOR
    19.
    发明申请
    DIRECTION DETECTION SENSOR 有权
    方向检测传感器

    公开(公告)号：US20100181993A1

    公开(公告)日：2010-07-22

    申请号：US12355882

    申请日：2009-01-19

    申请人： Devon Fernandez ,  William P. Taylor ,  Michael Morris ,  P. Karl Scheller ,  Eric Shoemaker

    发明人： Devon Fernandez ,  William P. Taylor ,  Michael Morris ,  P. Karl Scheller ,  Eric Shoemaker

    IPC分类号： G01B7/00 ,  G01R33/09 ,  G01R33/07

    CPC分类号： G01B7/30 ,  G01D5/145 ,  G01D5/2451 ,  G01R33/072 ,  G01R33/091

    摘要： A sensor responsive to movement of a detection target includes a magnetic field transducer operative to provide a magnetic field signal proportional to a magnetic field associated with the detection target, a peak detector for tracking positive and negative peaks of the magnetic field signal to generate a tracking signal, and a comparator having a first input responsive to the magnetic field signal, a second input responsive to an input signal related to the tracking signal, and an output at which is provided an output signal comprising first pulses having a first pulse width when the detection target moves in a first direction and second pulses having a second pulse width when the detection target moves in a second direction.

    摘要翻译： 响应于检测目标的移动的传感器包括磁场传感器，该磁场传感器可操作以提供与与检测目标相关联的磁场成比例的磁场信号;峰值检测器，用于跟踪磁场信号的正峰值和负峰值以产生跟踪 信号，以及具有响应于磁场信号的第一输入的比较器，响应于与跟踪信号相关的输入信号的第二输入，以及输出，在该输出处提供包括具有第一脉冲宽度的第一脉冲的输出信号， 检测目标在第一方向上移动，并且当检测目标沿第二方向移动时具有第二脉冲宽度的第二脉冲。

    Detection of passing magnetic articles while adapting the detection threshold
    20.
    发明授权
    Detection of passing magnetic articles while adapting the detection threshold 有权
    检测通过的磁性物品，同时适应检测阈值

    公开(公告)号：US06242908B1

    公开(公告)日：2001-06-05

    申请号：US09275209

    申请日：1999-03-24

    申请人： P. Karl Scheller ,  Glenn A. Forrest

    发明人： P. Karl Scheller ,  Glenn A. Forrest

    IPC分类号： G01P348

    CPC分类号： G01D5/24476 ,  G01D3/02 ,  G01D5/145 ,  G01D5/2448 ,  G01R33/02 ,  G01V3/081 ,  H03K5/082 ,  H03M1/303

    摘要： A method for detection of passing magnetic articles which includes an initial step of sensing an ambient magnetic field and generating a voltage, Vsig, proportional to the magnetic field. A threshold voltage is generated as a percentage of the peak-to-peak voltage of Vsig. The method further includes the step of generating a detector output voltage that becomes one binary level when Vsig rises to exceed the threshold voltage and another binary level when Vsig falls to below the threshold voltage. The threshold voltage is updated to track the positive and negative peaks of the Vsig voltage and is further updated by a predetermined amount upon each transition of the Vout voltage.

    摘要翻译： 用于检测通过磁性制品的方法，其包括感测周围磁场并产生与磁场成比例的电压Vsig的初始步骤。 产生阈值电压作为Vsig的峰 - 峰电压的百分比。 该方法还包括以下步骤：当Vsig上升到超过阈值电压时，产生检测器输出电压，该电压变为一个二进制电平，当Vsig下降到阈值电压以下时，产生另一二进制电平。 更新阈值电压以跟踪Vsig电压的正峰值和负峰值，并且在Vout电压的每次转换时进一步更新预定量。