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1.发明授权Target wheel sensor assembly for producing an asymmetric signal and for determining the direction of motion of the target wheel based on the signal shape 失效目标轮传感器组件，用于产生不对称信号并且用于基于信号形状来确定目标车轮的运动方向公开(公告)号：US06650110B2
公开(公告)日：2003-11-18
申请号：US09873871
申请日：2001-06-04
IPC分类号： G01B730
CPC分类号： G01B7/315
摘要： A target wheel sensor assembly includes a sensor that is placed near a target wheel. The sensor includes a magnet to create a flux and a sensing element to sense changes in the flux as the target wheel rotates. The target wheel is alternatingly formed with multiple teeth and multiple slots. Each tooth includes a flat portion that is parallel to the bottom of the sensor and a chamfered portion contiguous to the flat portion. The chamfered portion forms an angle, &agr;, with the bottom of the sensor. As the target wheel rotates, the shape of the teeth in conjunction with the slots cause the sensor to output an asymmetric signal. The shape of the signal is used to determine the direction of motion of the target wheel.
摘要翻译： 目标轮传感器组件包括放置在目标轮附近的传感器。 传感器包括用于产生磁通的磁体和感测元件，以在目标轮旋转时感测磁通量的变化。 目标轮交替地形成有多个齿和多个槽。 每个齿包括平行于传感器底部的平坦部分和与平坦部分邻接的倒角部分。 倒角部分与传感器的底部形成一个角度α。 当目标轮旋转时，齿的形状与狭槽结合使得传感器输出不对称信号。 信号的形状用于确定目标车轮的运动方向。
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2.发明授权Target wheel sensor assembly for determining position and direction of motion of a rotating target wheel 失效用于确定旋转目标轮的运动的位置和方向的目标轮传感器组件公开(公告)号：US06639399B2
公开(公告)日：2003-10-28
申请号：US09777764
申请日：2001-02-06
IPC分类号： G01B730
摘要： A target wheel sensor assembly includes a target wheel, a magnet, and a sensing element placed therebetween. The magnet and the sensing element are configured so that as the target wheel rotates the sensing element outputs an asymmetric signal. This asymmetric signal is used to determine the position of the target wheel as it rotates and the direction of motion of the target wheel.
摘要翻译： 目标轮传感器组件包括目标轮，磁体和放置在其间的感测元件。 磁体和感测元件构造成使得当目标轮旋转时，感测元件输出不对称信号。 该不对称信号用于确定目标车轮旋转时的位置和目标车轮的运动方向。
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公开(公告)号：US06577123B2
公开(公告)日：2003-06-10
申请号：US09873857
申请日：2001-06-04
IPC分类号： G01B714
CPC分类号： G01D5/147
摘要： A linear position sensor assembly includes a moving target and a stationary magnet. A magnetic sensor is placed adjacent to the magnet and senses changes in the magnetic flux density caused by the target moving within a magnetic field generated by the stationary magnet. The magnetic sensor outputs a signal that is linear over nearly the entire length of the target.
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公开(公告)号：US06566867B1
公开(公告)日：2003-05-20
申请号：US09339699
申请日：1999-06-24
IPC分类号： G01B714
CPC分类号： F02D41/009 , G01B7/30 , G01D5/249
摘要： In an angle-based binary encoded crankshaft position sensing system, a target wheel is coupled to a crankshaft and a single VR sensor is juxtaposed with the target wheel for sensing the angular position of the wheel and, hence, the angular position of the crankshaft. To permit the use of a single VR sensor in conjunction with an angle-based binary encoded system, the periphery of the target wheel is formed with teeth and slots defining a binary pattern. The slots are wider than the teeth, and the depth of the slots relative to the portion of the periphery defining a nominal radius is greater than the height of the teeth relative to the nominal periphery. With this structure, the signal generated by the sensor in response to a slot advantageously is symmetric to the signal generated by the sensor in response to a tooth.
摘要翻译： 在基于角度的二进制编码的曲轴位置感测系统中，目标轮联接到曲轴，并且单个VR传感器与目标轮并置，以便感测车轮的角位置，并因此感测曲轴的角位置。 为了允许与基于角度的二进制编码系统一起使用单个VR传感器，目标轮的周边形成有限定二进制模式的齿和狭槽。 狭槽比齿宽，并且槽相对于限定标称半径的周边部分的深度大于齿相对于标称周边的高度。 利用这种结构，由传感器响应于时隙产生的信号有利地与由传感器响应于齿产生的信号对称。
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5.发明授权Method and apparatus for robust generation of an index pulse for an electric power steering system 失效用于强力生成电动助力转向系统的指标脉冲的方法和装置公开(公告)号：US06329782B1
公开(公告)日：2001-12-11
申请号：US09650170
申请日：2000-08-29
IPC分类号： H02P124
摘要： A method and an apparatus using the method that generates an index pulse which includes firstly the generation of a first electronic signal which includes a first level and a second level based upon a multiphase sinusoidal motor control circuit. Secondly, the generation of at least a second electronic signal that includes a first level and a second level based upon a multiphase sinusoidal motor control circuit wherein the first electronic signal and the second electronic signal are levelly spaced apart based upon the phase number of the multiphase sinusoidal motor control circuit wherein a set difference in level exists for a first specified period between the first and said the signal. Thirdly, the determination of the index pulse based upon a transition from the first level to the second level of the first electronic signal.
摘要翻译： 一种使用该方法生成索引脉冲的方法和装置，该索引脉冲首先基于多相正弦电机控制电路产生包括第一电平和第二电平的第一电子信号。 其次，基于多相正弦电动机控制电路生成包括第一电平和第二电平的至少第二电子信号，其中基于多相位的相位数，第一电子信号和第二电子信号被高度间隔开 正弦电机控制电路，其中在第一和所述信号之间的第一指定周期存在电平的设定差。 第三，基于从第一电子信号的第一电平到第二电平的转变来确定索引脉冲。
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公开(公告)号：US06320374B1
公开(公告)日：2001-11-20
申请号：US09339450
申请日：1999-06-24
IPC分类号： G01B730
CPC分类号： G01P3/488 , G01B7/30 , G01P13/045
摘要： In an angle-based crankshaft position sensing system, an electrical circuit is provided for also sensing the direction of rotation of the crankshaft. A slotted target wheel is coupled to the crankshaft and a single dual-element MR sensor is juxtaposed with the target wheel. The elements generate respective detection signals when a slot passes by the elements, with the position of the slot being indicated as being directly under the sensor at the point in time when the detection signals intersect each other. Also, square waves are generated for each detection signal, and when the magnitude of the second square wave is non-zero when the falling edge of the first square wave occurs, a clockwise rotation is indicated. On the other hand, if the magnitude of the second square wave is zero when the falling edge of the first square wave occurs, a counterclockwise rotation is indicated.
摘要翻译： 在基于角度的曲轴位置感测系统中，提供了用于也感测曲轴的旋转方向的电路。 开槽的目标轮联接到曲轴，并且单个双元件MR传感器与目标轮并置。 当槽通过元件时，这些元件产生相应的检测信号，在检测信号彼此相交的时刻，槽的位置被指示为直接位于传感器下方。 此外，对于每个检测信号产生方波，并且当第一方波的下降沿出现时第二方波的幅度不为零时，指示顺时针旋转。 另一方面，如果发生第一方波的下降沿时第二方波的幅度为零，则表示逆时针旋转。
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公开(公告)号：US06268721B1
公开(公告)日：2001-07-31
申请号：US09250826
申请日：1999-02-17
IPC分类号： G01B730
CPC分类号： G01D5/147 , G01D5/246 , G01D5/2492
摘要： A detector of position of rotation of a target wheel via the outputs of a differential sensor employing two matched MRs to extract position of rotation information from the target wheel. The target wheel is provided with wide and narrow slots or teeth circumferentially arranged such that, for example, 24 zones are created wherein each zone ranges from the center of a wide slot to the center of a narrow slot, and wherein each zone occupies 15 degrees circumferentially. The two matched MRs of the sensor are powered by matched current sources and matched magnetic biasing and are aligned in the circumferential direction of the target wheel. The MRs generate two angularly offset signals from the passage of a single slot (or tooth) of the target wheel which are input to a signal conditioning circuit. Within the signal conditioning circuit, the two sensor signals are differentially amplified to produce a differential signal whereby the width of the slot is used to encode a binary position pulse. The spacing between the two matched MRs is such that their output resistances and, thus, their output signals become equal (crossover) in the middle of a slot whereby a wide slot causes the crossover to occur at a lower value of resistance (or output signal) than that of a narrow slot. The low level signal from a wide slot is assigned the binary value of “0” while the high level signal is assigned the binary value of “1” although the reverse assignments of binary values could also be used. Alternatively, the present invention is implementable by width encoded teeth instead of slots.
摘要翻译： 通过使用两个匹配的MR的差分传感器的输出，目标车轮的旋转位置的检测器，以从目标车轮提取旋转信息的位置。 目标轮设置有宽且窄的槽或齿周向布置，使得例如形成24个区域，其中每个区域从宽狭槽的中心到窄狭槽的中心，并且其中每个区域占据15度 周向地。 传感器的两个匹配的MR由匹配的电流源和匹配的磁偏压供电，并在目标轮的圆周方向上对准。 MRs从目标轮的单个槽（或齿）通过输入到信号调节电路的两个角度偏移信号。 在信号调理电路内，两个传感器信号被差分放大以产生差分信号，由此槽的宽度用于对二进制位置脉冲进行编码。 两个匹配的MR之间的间隔使得它们的输出电阻以及因此它们的输出信号在槽的中间变得相等（交叉），由此宽的槽使得交叉发生在较低的电阻值（或输出信号 ）比狭窄的槽。 尽管可以使用二进制值的反向分配，但是在高电平信号被赋予二进制值“1”的情况下，来自宽时隙的低电平信号被分配二进制值“0”。 或者，本发明可由宽度编码的齿代替槽实现。
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8.发明授权Rotational sensor including axially adjacent targets one of which having invariant permeability the other having varying permeability as they rotate 失效旋转传感器包括轴向相邻的靶，其中一个具有不变的磁导率，另一个在它们旋转时具有变化的磁导率
公开(公告)号：US5714883A
公开(公告)日：1998-02-03
申请号：US580037
申请日：1995-12-20
CPC分类号： G01D5/145 , F02P7/0675
摘要： A rotation sensor has a target wheel including first and second tracks and a dual-element magnetoresistive sensor. Each individual magnetoresistive element is aligned with a respective track of the target wheel to provide substantially inverse resistive changes with the passage of the wheel. One of the tracks is characterized by alternating high and low permeability, such as by a toothed section, and the other of the tracks is characterized by invariant permeability.
摘要翻译： 旋转传感器具有包括第一和第二轨道的目标轮和双元件磁阻传感器。 每个单独的磁阻元件与目标轮的相应轨道对准，以随着车轮的通过而提供基本上反的电阻变化。 其中一个轨道的特征在于交替的高和低磁导率，例如通过齿形部分，并且轨道的另一个的特征在于不变的磁导率。
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9.发明授权Analog angle encoder having a single piece magnet assembly surrounding an air gap 失效模拟角度编码器具有围绕气隙的单片磁体组件公开(公告)号：US06614223B2
公开(公告)日：2003-09-02
申请号：US09929149
申请日：2001-08-14
申请人： Thaddeus Schroeder , Bruno Patrice Bernard Lequesne , Avoki M. Omekanda , Steven Douglas Thomson
发明人： Thaddeus Schroeder , Bruno Patrice Bernard Lequesne , Avoki M. Omekanda , Steven Douglas Thomson
IPC分类号： G01B230
CPC分类号： G01D5/145
摘要： An analog angle encoder having a simply constructed magnet assembly, wherein rotation of a magnetic field relative to a magnetosensitive device provides a varying output of the magnetosensitive device that varies sinusoidally with the angle of relative rotation. The simply constructed magnet assembly is of a closed-path geometry composed of a single piece of magnetic material wherein only a first portion thereof is magnetized for providing the aforesaid magnetic field for the sensor. The remaining portion of the magnet material (the second portion) remains unmagnetized and does not substantially influence the magnetic field produced by the first portion any more than, for example, air would cause.
摘要翻译： 具有简单构造的磁体组件的模拟角度编码器，其中磁场相对于磁敏装置的旋转提供了与相对旋转角正弦变化的磁敏装置的变化的输出。 简单构造的磁体组件是由单个磁性材料组成的闭路几何形状，其中只有其第一部分被磁化以提供用于传感器的上述磁场。 磁体材料的剩余部分（第二部分）保持不磁化，并且基本上不影响第一部分产生的比例如空气将产生的磁场。
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公开(公告)号：US5668471A
公开(公告)日：1997-09-16
申请号：US578305
申请日：1995-12-26
CPC分类号： G01D5/147
摘要： A rotation sensor for high accuracy angle applications such as internal combustion engine crankshaft position sensing includes a pair of complementary target wheels and a dual-element magnetoresistive sensor. The target wheels are spaced from one another along the rotational axis by a predetermined distance. The individual magnetoresistive elements are similarly spaced one from the other and are influence by the ferrite effects of the target wheels. The spacing of the target wheels and magnetoresistive elements are selected in relation to one another and in relation to the mount of axial play in the crankshaft such that changes in ferrite effects of the target wheels upon the elements due to axial displacements of the crankshaft have minimal effect on the accuracy of the sensing apparatus.
摘要翻译： 用于高精度角度应用的旋转传感器，例如内燃机曲轴位置检测包括一对互补目标轮和双元件磁阻传感器。 目标轮沿着旋转轴线彼此间隔预定距离。 单个磁阻元件彼此相似地间隔开并且受到目标轮的铁氧体效应的影响。 目标轮和磁阻元件的间距相对于彼此并且相对于曲轴中的轴向游隙的安装来选择，使得由于曲轴的轴向位移而使目标轮对元件的铁素体效应的变化最小化 影响感测装置的精度。
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