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1.发明授权
公开(公告)号：US5670875A
公开(公告)日：1997-09-23
申请号：US627760
申请日：1996-03-29
摘要： An angular position sensor is provided with a rotatable magnet and first and second ferromagnetic pole pieces. The first ends of the ferromagnetic pole pieces are disposed on opposite sides of the rotatable permanent magnet and the second ends of the ferromagnetic pole pieces are arranged in overlapping association with a magnetically sensitive component disposed therebetween. First and second ferromagnetic inserts are provided which are movable with respect gaps between the permanent magnet and the first ends of the first and second pole pieces. By changing the relative positions between the first and second inserts and their respective gaps, the gain and offset of an output signal from the magnetically sensitive component can be altered to achieve predetermined characteristics.
摘要翻译： 角位置传感器设置有可旋转磁体和第一和第二铁磁极片。 铁磁极片的第一端设置在可旋转永磁体的相对侧上，铁磁极片的第二端与设置在它们之间的磁敏元件重叠地布置。 提供第一和第二铁磁插入件，其可以相对于永磁体和第一和第二极靴的第一端之间的间隙移动。 通过改变第一和第二插入件之间的相对位置及其各自的间隙，可以改变来自磁敏部件的输出信号的增益和偏移量以实现预定特性。
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公开(公告)号：US20080007255A1
公开(公告)日：2008-01-10
申请号：US11483481
申请日：2006-07-10
申请人： Stewart D. Johnson , EuGene D. Alfors , Lawrence E. Franzee , Joseph K. Murdock , Jason M. Chilcote , John S. Patin
发明人： Stewart D. Johnson , EuGene D. Alfors , Lawrence E. Franzee , Joseph K. Murdock , Jason M. Chilcote , John S. Patin
IPC分类号： G01B7/14
摘要： Multiple magnetic sensing transducers can detect the position of a target. For example, a linear array of transducers can detect a target's linear position. A master and slave arrangement can reduce the cost and size of a system containing multiple magnetic sensing transducers. The master contains circuitry for voltage regulation and processing logic as well as a magnetic sensing transducer. The slaves contain a magnetic sensing transducer and little else. As such, the slave units are small and inexpensive. The slaves obtain power from the master, produce detection signals, and pass the detection signals to the master. The master interprets the detection signals along with an internal detection produced by the master's internal magnetic sensing transducer to produce a position signal.
摘要翻译： 多个磁感应传感器可以检测目标的位置。 例如，换能器的线性阵列可以检测目标的线性位置。 主从配置可以降低包含多个磁传感器的系统的成本和尺寸。 主器件包含用于电压调节和处理逻辑的电路以及磁传感器。 从站包含一个磁传感器，另外一些。 因此，从属单元是小而便宜的。 从站从主站获取电源，产生检测信号，并将检测信号传递给主站。 主机将检测信号与主机内部磁感应传感器产生的内部检测一起解释，产生位置信号。
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3.发明授权Adaptive geartooth sensor with dual peak detectors and true power on capability 有权具有双峰值检测器和真正上电能力的自适应齿轮传感器公开(公告)号：US06967477B1
公开(公告)日：2005-11-22
申请号：US11003845
申请日：2004-12-02
CPC分类号： G01D5/145 , G01D5/147 , G01D5/24452 , G01D5/2448 , G01D5/2449
摘要： Methods and systems for detecting a rotating target are disclosed herein, wherein a biasing magnet is associated with a rotating target in association with a dual peak detector. The rotating target generally comprises a plurality of teeth and at least one slot formed between at least one tooth of the rotating target. In general, the biasing magnet and the rotating target generate a magnetic signal having positive and negative peaks thereof. The dual peak detector includes a tooth detector and a slot detector, such that the dual peak detector detects a minimum and maximum peak of the magnetic signal generated by the biasing magnet and the rotating target. Additionally, a clamping circuit can be associated with the dual peak detector, wherein the clamping circuit can provide a true power on (TPO) functionality.
摘要翻译： 本文公开了用于检测旋转靶的方法和系统，其中与双峰检测器相关联的偏置磁体与旋转靶相关联。 旋转靶通常包括多个齿和形成在旋转靶的至少一个齿之间的至少一个槽。 通常，偏置磁体和转动目标产生具有正和负峰的磁信号。 双峰检测器包括齿检测器和缝隙检测器，使得双峰检测器检测由偏置磁体和旋转靶产生的磁信号的最小和最大峰值。 此外，钳位电路可以与双峰值检测器相关联，其中钳位电路可以提供真正的上电（TPO）功能。
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公开(公告)号：US07271584B2
公开(公告)日：2007-09-18
申请号：US11178654
申请日：2005-07-09
CPC分类号： G01D5/24476
摘要： A magnetic sensing apparatus includes a first magnetic transducer separated spatially from a second magnetic transducer and proximate to a target and a direction decoding circuit associated with the first and second magnetic transducers, wherein the direction decoding circuit produces output pulses that provide data indicative of a rotation of the target while rejecting rotational vibration signals associated with the target during a rotational detection of the target utilizing the first and second magnetic transducers without producing erroneous output pulses or missing an excessive number of the output pulses during speed and rotational detection operations thereof.
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公开(公告)号：US5644225A
公开(公告)日：1997-07-01
申请号：US632874
申请日：1996-04-16
CPC分类号： G01D18/00 , G01B7/30 , G01D5/2033
摘要： A method is provided to calibrate an angular position sensor by using an electrical coil to provide a magnetic field that simulates the presence of a permanent magnet. By successively selecting currents to flow through the electrical coil and by moving the electrical coil through at least two angular positions, the gain of an output relationship between a signal from a magnetically sensitive component and the angular position of the coil can be determined. By changing the intensity of the electrical current flowing through the coil, the intensity of the magnetic field emanating from the coil can be selected. In order to achieve the appropriate null offset characteristic of the device, the electrical coil is moved until a preselected output voltage is achieved. By comparing the angular position of the coil when the output voltage is achieved to an angular position of the coil for the desired output signal characteristic, a calibration angle can be determined. A ferromagnetic object is then magnetized with a magnetic field of the determined intensity and at an angle equal to the calibration angle.
摘要翻译： 提供了一种通过使用电线圈来校正角位置传感器以提供模拟永磁体的存在的磁场的方法。 通过连续地选择电流流过电线圈并且通过使电线圈移动通过至少两个角位置，可以确定来自磁敏部件的信号与线圈的角位置之间的输出关系的增益。 通过改变流过线圈的电流的强度，可以选择从线圈发出的磁场的强度。 为了实现器件的适当的零点偏移特性，电线圈被移动直到达到预选的输出电压。 通过将实现输出电压时的线圈的角位置与期望的输出信号特性的线圈的角位置进行比较，可以确定校准角度。 然后用确定的强度的磁场和等于校准角度的角度对铁磁物体进行磁化。
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