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31. 发明授权

US06297627B1 Detection of passing magnetic articles with a peak-to-peak percentage threshold detector having a forcing circuit and automatic gain control 有权
标题翻译：用具有强制电路和自动增益控制的峰 - 峰百分比阈值检测器检测通过的磁性制品
公开(公告)号：US06297627B1
公开(公告)日：2001-10-02
申请号：US09239023
申请日：1999-01-27
申请人： Jay M. Towne , Ravi Vig , P. Karl Scheller
发明人： Jay M. Towne , Ravi Vig , P. Karl Scheller
IPC分类号： G01P348
CPC分类号： H03K5/082 , G01R33/0041 , H03G3/001 , H03K5/153 , H03K17/9517
摘要： A proximity detector for sensing a magnetic field includes a magnetic-field-to-voltage transducer for generating a signal voltage Vsig that is proportional to the magnetic field, a peak-to-peak percentage threshold detector coupled to the magnetic-field-to-voltage transducer to receive the signal voltage Vsig and for providing an output signal voltage Vout and a forcing circuit coupled to the peak-to-peak percentage threshold detector for forcing and maintaining the value of the output signal voltage Vout at a predetermined value during an initial startup interval of the proximity detector. The proximity detector may further include an automatic gain control circuit coupled to the forcing circuit to provide a proximity detector capable of operating in a peak-to-peak percentage threshold detector mode with automatic gain control.
摘要翻译：用于感测磁场的接近检测器包括用于产生与磁场成比例的信号电压Vsig的磁场 - 电压转换器，耦合到磁场 - 电压 - 电压传感器以接收信号电压Vsig，并用于提供输出信号电压Vout和耦合到峰 - 峰百分比阈值检测器的强制电路，用于在初始期间将输出信号电压Vout的值强制并保持在预定值接近检测器的启动间隔。接近检测器还可以包括耦合到强制电路的自动增益控制电路，以提供能够以具有自动增益控制的峰 - 峰百分比阈值检测器模式操作的接近检测器。

32. 发明授权

US06232768B1 Centering a signal within the dynamic range of a peak detecting proximity detector 失效
标题翻译：将信号置于峰值检测接近检测器的动态范围内
公开(公告)号：US06232768B1
公开(公告)日：2001-05-15
申请号：US08852856
申请日：1997-05-07
申请人： Kristann L. Moody , Ravi Vig , P. Karl Scheller , Jay M. Towne , Teri L. Tu
发明人： Kristann L. Moody , Ravi Vig , P. Karl Scheller , Jay M. Towne , Teri L. Tu
IPC分类号： G01B730
CPC分类号： G01D3/02 , G01D5/145 , G01D5/2448 , H03M1/303
摘要： A magnetic-field-to-voltage transducer includes a Hall element and a digitally gain-controlled Hall-voltage amplifier that produces an analog voltage Vsig having excursions of one polarity corresponding to the passing of magnetic articles. Vsig is applied to the input of a peak-referenced-threshold signal detector that generates a binary proximity-detector output voltage, Vout, having transitions of one direction upon approaches of gear teeth down to zero speed. A digitally gain-controlled amplifier is connected to the Hall element. A comparator circuit generates a binary signal Vbig (or Vtoobig) that changes from one to another binary level each time that Vsig exceeds a DC target voltage, VTG. The AGC circuit incrementally changes the transducer gain in the direction to bring the peaks in Vsig to just below the target value TTG. Reference voltages VP2 and VN2 are generated that are equal respectively to the most recent peak positive and negative going excursion in Vsig. DC off-set-limit voltages VA and VB are provided that are respectively above and below the center of the dynamic voltage range of the detector, and the entire signal Vsig at the output of the amplifier is biased in a negative direction when the median value, Vos, of Vsig is greater than VA and moving the entire signal Vsig in a less positive direction when Vos is less than VB to keep Vos within the range from VB to VA.
摘要翻译：磁场电压换能器包括霍尔元件和数字增益控制的霍尔电压放大器，其产生具有与磁性物品通过相对应的一个极性的偏移的模拟电压Vsig。 Vsig被施加到峰值参考阈值信号检测器的输入端，该检测器产生二进制接近检测器输出电压Vout，在齿轮齿接近零速度时具有一个方向的转变。数字增益控制放大器连接到霍尔元件。比较器电路每当Vsig超过DC目标电压VTG时产生从一个到另一个二进制电平的二进制信号Vbig（或Vtoobig）。 AGC电路逐渐改变传感器增益的方向，使Vsig中的峰值刚好低于目标值TTG。产生参考电压VP2和VN2，其分别等于Vsig中最近的峰值正负偏移。提供分别在检测器的动态电压范围的中心上方和下方的直流偏置电压VA和VB，并且当放大器的输出处的中值的偏移为放大器的输出端的整个信号Vsig时，Vsig的Vos大于VA，并且当Vos小于VB时将整个信号Vsig移动到较小的正方向，以将Vos保持在从VB到VA的范围内。

33. 发明授权

US5917320A Detection of passing magnetic articles while periodically adapting detection threshold 失效
标题翻译：检测通过的磁性物品，同时周期性调整检测阈值
公开(公告)号：US5917320A
公开(公告)日：1999-06-29
申请号：US847703
申请日：1997-04-28
申请人： P. Karl Scheller , Ravi Vig , Jay M. Towne , Hitoshi Yabusaki
发明人： P. Karl Scheller , Ravi Vig , Jay M. Towne , Hitoshi Yabusaki
IPC分类号： G01B7/00 , G01B7/30 , G01D3/02 , G01D5/14 , G01D5/244 , G01D5/245 , G01P3/488 , G01R33/02 , G01V3/08 , H03K5/08 , H03K17/95 , H03M1/30 , G01P3/48 , G01B7/14 , G01P3/489
CPC分类号： G01D3/02 , G01D5/145 , G01D5/24476 , G01D5/2448 , G01V3/081 , 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 proximity 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 periodically updated to remain the percentage, within a predetermined tolerance, of the peak-to-peak voltage of Vsig in response to changes that may occur in the peak voltages of Vsig. In one embodiment, the threshold voltage is at a first level corresponding to a first percentage of the peak-to-peak voltage of Vsig when Vsig exceeds the threshold voltage and is at a second level corresponding to a second percentage of the peak-to-peak voltage of Vsig when Vsig is less than the threshold 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升高到超过阈值电压时，产生接近检测器输出电压，该电压变为一个二进制电平，当Vsig下降到阈值电压以下时，产生另一个二进制电平。周期性地更新阈值电压，以便在Vsig的峰值电压中可能发生的变化的情况下，保持在Vsig的峰 - 峰电压的预定容限内的百分比。在一个实施例中，当Vsig超过阈值电压时，阈值电压处于对应于Vsig的峰 - 峰电压的第一百分比的第一电平，并且处于对应于峰 - 峰电压的第二百分比的第二电平，当Vsig小于阈值电压时，Vsig的峰值电压。

34. 发明授权

US5650719A Detection of passing magnetic articles while periodically adapting detection thresholds to changing amplitudes of the magnetic field 失效
标题翻译：检测通过的磁性制品，同时周期性地调整检测阈值以改变磁场的振幅
公开(公告)号：US5650719A
公开(公告)日：1997-07-22
申请号：US587407
申请日：1996-01-17
申请人： Kristann L. Moody , Ravi Vig , P. Karl Scheller , Jay M. Towne , Teri L. Tu
发明人： Kristann L. Moody , Ravi Vig , P. Karl Scheller , Jay M. Towne , Teri L. Tu
IPC分类号： G01B7/00 , G01D3/02 , G01D5/14 , G01D5/244 , G01D5/245 , G01V3/08 , H03K17/95 , H03M1/30 , G01P3/48 , G01P3/489
CPC分类号： G01D5/24476 , G01D3/02 , G01D5/145 , G01D5/2448 , G01V3/081 , H03M1/303
摘要： A Hall transducer produces a signal Vsig. Threshold voltages V.sub.Pth and V.sub.Nth are generated at the beginning, t.sub.update, of each of a succession of update time intervals, of 64 pulses in Vsig, to be fixed percentages respectively of the peak to peak voltage in Vsig. A proximity-detector binary output voltage is high when Vsig exceeds threshold voltage V.sub.Pth and low when Vsig is below threshold voltage V.sub.Nth. Signals V.sub.Pold and V.sub.Nold, generated by first and second DACs, are equal to the first positive and negative peaks in Vsig after each time t.sub.update initiating the start of a successive interval. Signals V.sub.Pnew and V.sub.Nnew, simultaneously generated by third and fourth DACs, are equal to the greatest positive and negative peak voltages in Vsig during the interval ending at t.sub.update. Counters present their count to the first and second DACs that count pulses from a clock for tracking and holding +/- peaks in Vsig. After each time t.sub.update, a pulse in a signal Vupdt is generated if at time t.sub.update V.sub.Nnew lies outside the range. V.sub.Nold -v to V.sub.Nold +v of if V.sub.Nnew lies outside the range V.sub.Nold -v to V.sub.Nold +v, where v is an incremental DC bias voltage. Vupdt resets the counters so that during the succeeding update time interval the threshold voltages V.sub.Pth and V.sub.Nth have the fixed percentages of the updated threshold voltages V.sub.Pnew -V.sub.Nnew.
摘要翻译：霍尔传感器产生信号Vsig。阈值电压VPth和VNth在Vsig中的64个脉冲的连续更新时间间隔的每一个的开始时产生，分别为Vsig中峰峰值电压的固定百分比。当Vsig超过阈值电压VPth时，接近检测器二进制输出电压为高电平，当Vsig低于阈值电压VNth时，接近检测器二进制输出电压为高电平。由第一和第二DAC产生的信号VPold和VNold等于每次启动连续间隔开始后的Vsig中的第一个正和负峰值。由第三和第四DAC同时产生的信号VPnew和VNnew等于在tupdate结束的间隔期间的Vsig中最大的正和负峰值电压。计数器将其计数器显示给第一和第二DAC，它们计数来自时钟的脉冲，用于跟踪Vsig中的+/-峰。在每次tupdate之后，如果在tupdate VNnew处于该范围之外，则产生信号Vupdt中的脉冲。如果VNnew位于VNold- + Z v到VNold ++ Z v的范围之外，则VNold- + Z v至VNold ++ Z v，其中+ Z v是增量DC偏置电压。 Vupdt复位计数器，使得在成功更新时间间隔期间，阈值电压VPth和VNth具有更新的阈值电压VPnew-VNnew的固定百分比。

35. 发明授权

US09081041B2 High accuracy differential current sensor for applications like ground fault interrupters 有权
标题翻译：高精度差动电流传感器，适用于接地故障断路器
公开(公告)号：US09081041B2
公开(公告)日：2015-07-14
申请号：US13439094
申请日：2012-04-04
申请人： Andreas P. Friedrich , Andrea Foletto , P. Karl Scheller , William P. Taylor , Michael C. Doogue
发明人： Andreas P. Friedrich , Andrea Foletto , P. Karl Scheller , William P. Taylor , Michael C. Doogue
IPC分类号： G01R33/02 , G01R15/20
CPC分类号： G01R15/207
摘要： A sensor with multiple magnetic field sensing elements for use in current sensing and other applications is presented. In one configuration, the sensor can obtain differential and absolute current measurements of current in current-carrying conductors. When employed in a ground fault interrupter (GFI) application, a first magnetic field sensing element can be used to measure the absolute current flowing in the phase conductor (phase current), a second magnetic field sensing element can be used to measure the absolute current flowing in the neutral conductor (neutral current) and a difference between the phase and neutral currents can be measured by a third magnetic field sensing element or determined from measurements of the first and second magnetic field sensing elements. In another configuration, the sensor can obtain a measure of the difference between currents and/or the sum of currents in current-carrying conductors.
摘要翻译：提出了一种用于电流检测和其他应用的具有多个磁场感测元件的传感器。在一种配置中，传感器可以获得载流导体中电流的差分和绝对电流测量。当用于接地故障断续器（GFI）应用时，可以使用第一磁场感测元件来测量在相导体（相电流）中流动的绝对电流，第二磁场感测元件可用于测量绝对电流在中性导体（中性电流）中流动，并且相电流和中性电流之间的差异可以由第三磁场感测元件测量或者由第一和第二磁场感测元件的测量确定。在另一种配置中，传感器可以获得电流差和/或载流导体中电流之和的量度。

36. 发明授权

US08896295B2 Magnetic field sensor having multiple sensing elements and a programmable misalignment adjustment device for misalignment detection and correction in current sensing and other applications 有权
标题翻译：具有多个感测元件的磁场传感器和用于电流检测和其他应用中的未对准检测和校正的可编程的未对准调整装置
公开(公告)号：US08896295B2
公开(公告)日：2014-11-25
申请号：US13439074
申请日：2012-04-04
申请人： Andreas P. Friedrich , Andrea Foletto , P. Karl Scheller , William P. Taylor , Michael C. Doogue
发明人： Andreas P. Friedrich , Andrea Foletto , P. Karl Scheller , William P. Taylor , Michael C. Doogue
IPC分类号： G01B7/14
CPC分类号： G01R33/0094 , G01R15/207 , H01L43/06 , H01L43/065 , H01L43/08
摘要： A sensor with multiple magnetic field sensing elements for use in current sensing and other applications is presented. The sensor includes an arrangement of two or more magnetic field sensing elements to sense magnetic field associated with a target. The sensor further includes circuitry to generate a sensor output signal based on sensing of at least one of the magnetic field sensing elements of the arrangement. Also included is a programmable misalignment adjustment block to control the circuitry to generate the output signal with compensation for misalignment between the sensor and the target. The programmable misalignment adjustment block can be programmed to select measurement of one of the two or more magnetic field sensing elements, or alternatively, a mathematical combination of measurements of the two or more magnetic field sensing elements, for generating the sensor output signal when a test of the sensor indicates a misalignment.
摘要翻译：提出了一种用于电流检测和其他应用的具有多个磁场感测元件的传感器。传感器包括两个或更多个磁场感测元件的布置，用于感测与目标相关联的磁场。该传感器还包括基于感测该装置的磁场感测元件中的至少一个来产生传感器输出信号的电路。还包括可编程的未对准调整块，以控制电路以产生输出信号，并补偿传感器和目标之间的未对准。可编程的未对准调整块可以被编程以选择两个或更多个磁场感测元件中的一个的测量，或者替代地，两个或更多个磁场感测元件的测量的数学组合，用于当测试时产生传感器输出信号的传感器表示未对准。

37. 发明申请

US20130265037A1 ANGLE SENSOR WITH MISALIGNMENT DETECTION AND CORRECTION 有权
标题翻译：具有误差检测和校正的角度传感器
公开(公告)号：US20130265037A1
公开(公告)日：2013-10-10
申请号：US13439082
申请日：2012-04-04
申请人： Andreas P. Friedrich , Andrea Foletto , P. Karl Scheller , William P. Taylor , Michael C. Doogue
发明人： Andreas P. Friedrich , Andrea Foletto , P. Karl Scheller , William P. Taylor , Michael C. Doogue
IPC分类号： G01B7/30 , G01R33/09 , G01R33/07
CPC分类号： G01R33/0094 , G01D3/028 , G01R33/07 , G01R33/09
摘要： An angle sensor to provide sensor-to-magnet misalignment detection and correction capability in rotation angle measurement applications is presented. The angle sensor has magnetic field sensing elements to sense magnetic field associated with a rotating magnet. The angle sensor includes circuitry to generate signals based on the sensing by the sensing elements. The signals provide information that can be combined according to an error function to provide misalignment detection. The angle sensor can be used with or can be incorporated in an angle measurement device that employs a processing unit to produce a rotation angle value. In one embodiment, the processing unit is configured to implement the error function and correct the angle value for detected misalignment. In another embodiment, the error function is performed by a programming device and detected misalignment is corrected through mechanical adjustment of sensor-to-magnet position.
摘要翻译：提出了一种角度传感器，用于在旋转角度测量应用中提供传感器到磁体的未对准检测和校正能力。角度传感器具有用于感测与旋转磁体相关联的磁场的磁场感测元件。角度传感器包括基于感测元件的感测产生信号的电路。信号提供可以根据误差函数组合以提供不对准检测的信息。该角度传感器可以与采用加工单元产生旋转角度值的角度测量装置结合使用或者可以并入其中。在一个实施例中，处理单元被配置为实现误差函数并校正检测到的未对准的角度值。在另一个实施例中，误差函数由编程装置执行，并且通过传感器到磁体位置的机械调节来校正检测到的未对准。

38. 发明申请

US20130265036A1 MAGNETIC FIELD SENSOR HAVING MULTIPLE SENSING ELEMENTS FOR MISALIGNMENT DETECTION AND CORRECTION IN CURRENT SENSING AND OTHER APPLICATIONS 有权
标题翻译：具有多种传感元件的磁场传感器用于电流传感和其他应用中的误差检测和校正
公开(公告)号：US20130265036A1
公开(公告)日：2013-10-10
申请号：US13439074
申请日：2012-04-04
申请人： Andreas P. Friedrich , Andrea Foletto , P. Karl Scheller , William P. Taylor , Michael C. Doogue
发明人： Andreas P. Friedrich , Andrea Foletto , P. Karl Scheller , William P. Taylor , Michael C. Doogue
IPC分类号： H01L43/06 , G01B7/14
CPC分类号： G01R33/0094 , G01R15/207 , H01L43/06 , H01L43/065 , H01L43/08
摘要： A sensor with multiple magnetic field sensing elements for use in current sensing and other applications is presented. The sensor includes an arrangement of two or more magnetic field sensing elements to sense magnetic field associated with a target. The sensor further includes circuitry to generate a sensor output signal based on sensing of at least one of the magnetic field sensing elements of the arrangement. Also included is a programmable misalignment adjustment block to control the circuitry to generate the output signal with compensation for misalignment between the sensor and the target. The programmable misalignment adjustment block can be programmed to select measurement of one of the two or more magnetic field sensing elements, or alternatively, a mathematical combination of measurements of the two or more magnetic field sensing elements, for generating the sensor output signal when a test of the sensor indicates a misalignment.
摘要翻译：提出了一种用于电流检测和其他应用的具有多个磁场感测元件的传感器。传感器包括两个或更多个磁场感测元件的布置，用于感测与目标相关联的磁场。该传感器还包括基于感测该装置的磁场感测元件中的至少一个来产生传感器输出信号的电路。还包括可编程的未对准调整块，以控制电路以产生输出信号，并补偿传感器和目标之间的未对准。可编程的未对准调整块可以被编程以选择两个或更多个磁场感测元件中的一个的测量，或者替代地，两个或更多个磁场感测元件的测量的数学组合，用于当测试时产生传感器输出信号的传感器表示未对准。

39. 发明授权

US08089270B2 Magnetic field detector having a variable threshold 有权
标题翻译：具有可变阈值的磁场检测器
公开(公告)号：US08089270B2
公开(公告)日：2012-01-03
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： G01B7/30
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。

40. 发明申请

US20100264909A1 Circuits and Methods for Providing a Magnetic Field Sensor with an Adaptable Threshold 有权
标题翻译：提供具有适应阈值的磁场传感器的电路和方法
公开(公告)号：US20100264909A1
公开(公告)日：2010-10-21
申请号：US12425528
申请日：2009-04-17
申请人： P. Karl Scheller , Andreas P. Fredrich , William P. Taylor
发明人： P. Karl Scheller , Andreas P. Fredrich , William P. Taylor
IPC分类号： H01L43/06 , H01L43/08
CPC分类号： G01R33/0029 , H01L43/06 , H01L43/08
摘要： A magnetic field has a threshold that adapts in relation to a magnitude of a magnetic field signal representative of a movement of an object. A corresponding method adapts a threshold in relation to a magnitude of a magnetic field signal representative of a movement of an object.
摘要翻译：磁场具有相对于表示物体的运动的磁场信号的大小适应的阈值。相应的方法适应相对于表示物体的运动的磁场信号的大小的阈值。

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