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公开(公告)号：US5492571A
公开(公告)日：1996-02-20
申请号：US140956
申请日：1993-10-25
申请人： Robert A. Frosch , Thomas A. Perry , John R. Bradley , Thaddeus Schroeder , Bruno P. B. Lequesne
发明人： Robert A. Frosch , Thomas A. Perry , John R. Bradley , Thaddeus Schroeder , Bruno P. B. Lequesne
IPC分类号： C21D1/04 , C21D1/09 , C21D1/34 , G01D5/249 , G01P3/487 , G06K1/12 , H01F1/03 , H01F1/057 , H02K1/27 , H02K15/03 , H01F1/032
CPC分类号： H02K15/03 , C21D1/04 , C21D1/34 , G01D5/249 , G01P3/487 , G06K1/125 , H01F1/0306 , H01F1/057 , H02K1/2733 , C21D1/09 , C21D2221/00 , Y10T29/49007
摘要： An article comprising first and second bodies of permanent magnet material, each of said first and second bodies consisting substantially of a substrate of permanent magnet material being magnetized substantially uniformly to a predetermined flux density in a range from zero flux to 100% flux saturation of the permanent magnet material; each of the first and second bodies also comprising a pattern of at least one affected volume in a surface of the body, wherein each affected volume has a magnetic flux density that varies from the substantially uniform predetermined flux density and wherein the first and second bodies are stacked and fixedly attached so that the pattern on each body aligns with the pattern on the other body, wherein at least one affected volume on the first body is aligned with at least one affected volume on the second body and wherein the aligned affected volumes comprise a pole detectable by a magnetic sensor.
摘要翻译： 一种包括永磁材料的第一和第二本体的制品，所述第一和第二主体中的每一个基本上由永久磁铁材料的基底组成，其基本均匀地磁化至预定的磁通密度，其范围为零通量至100％的磁通饱和度 永磁材料; 所述第一和第二主体中的每一个还包括在所述主体的表面中的至少一个受影响的体积的图案，其中每个受影响的体积具有从基本上均匀的预定通量密度变化的磁通密度，并且其中所述第一和第二主体是 堆叠并固定地附接，使得每个主体上的图案与另一个主体上的图案对准，其中第一主体上的至少一个受影响的体积与第二主体上的至少一个受影响的体积对准，并且其中对准的受影响体积包括 磁极可由磁传感器检测。
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公开(公告)号：US5570016A
公开(公告)日：1996-10-29
申请号：US252293
申请日：1994-06-01
申请人： Thaddeus Schroeder , Bruno P. B. Lequesne , Raymond O. Butler, Jr. , Anthony L. Marks , Thomas A. Perry , John R. Bradley
发明人： Thaddeus Schroeder , Bruno P. B. Lequesne , Raymond O. Butler, Jr. , Anthony L. Marks , Thomas A. Perry , John R. Bradley
CPC分类号： G01D5/2497 , G01B7/30 , G01D5/147
摘要： A method and apparatus for detecting an engine crankshaft angular position which provides for fast starting of the engine. A target wheel and sensor combination generate an analog signal which is convened into a 24 bit digital output which repeats every 360.degree. rotation of the crankshaft. Each bit represents a particular angular position of the crankshaft. Any 6 sequential bits in the repeating 24 bit digital output sequence form a unique pattern. By monitoring the first six bits generated (90.degree. of crankshaft rotation) during startup, a crankshaft angular position can be determined, thereby enabling fast starting of the engine.
摘要翻译： 一种用于检测发动机曲轴角位置的方法和装置，其提供发动机的快速启动。 目标轮和传感器组合产生模拟信号，该模拟信号被转换成24位数字输出，其重复曲轴每360度的旋转。 每个位表示曲轴的特定角度位置。 重复的24位数字输出序列中的任何6个连续位形成一个独特的模式。 通过监视启动时产生的前六位（曲轴旋转90°），可以确定曲轴角度位置，从而能够快速启动发动机。
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公开(公告)号：US5492572A
公开(公告)日：1996-02-20
申请号：US345055
申请日：1994-11-25
IPC分类号： C21D1/04 , C21D1/09 , C21D1/34 , G01D5/249 , G01P3/487 , G06K1/12 , H01F1/03 , H01F1/057 , H02K1/27 , H02K15/03 , H01F1/04
CPC分类号： H02K1/2733 , C21D1/04 , C21D1/34 , G01D5/249 , G01P3/487 , G06K1/125 , H01F1/0306 , H01F1/057 , H02K15/03 , C21D1/09 , C21D2221/00 , Y10T29/4902
摘要： A magnetized or unmagnetized body of a permanent magnet material is heated in a pattern by a laser beam to a temperature sufficient to lower the coercivity of selected heated regions of the pattern and exposed to a magnetic field to magnetize or to remagnetize the selected heated regions. A pattern guide is used in the process to densify the pattern. In the process, energy is directed through the pattern guide and onto the selected regions, while the pattern guide prevents or minimizes heating of unselected portions of the body. Magnets so produced can have very high pole density, digital encoding and analog patterns having gradually varying local field strength.
摘要翻译： 永磁材料的磁化或非磁化体通过激光束以图案加热至足以降低图案的选定加热区域的矫顽力并暴露于磁场以使磁化或使所选择的加热区域再磁化的温度。 在该过程中使用图案指南来致密化图案。 在该过程中，能量通过图案引导件引导到所选择的区域上，同时图案引导件防止或最小化身体的未选择部分的加热。 如此制造的磁体可以具有非常高的极点密度，数字编码和具有逐渐变化的局部场强的模拟图案。
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公开(公告)号：US5283130A
公开(公告)日：1994-02-01
申请号：US788662
申请日：1991-11-06
CPC分类号： G06K1/125 , Y10T428/31993
摘要： A permanent magnet is heated in a pattern by a laser beam to a localized temperature above the Curie point or a temperature sufficient to reduce the magnet coercivity sufficiently for the field of the magnet or an external field to remagnetize the pattern in the reverse direction. Magnets so produced can have very high pole density, digital encoding and analog patterns having gradually varying local field strength.
摘要翻译： 永磁体通过激光束以图案加热到高于居里点的局部温度或足以使磁体矫顽磁力充分降低磁场或外场的温度，从而使反向图案再磁化。 如此制造的磁体可以具有非常高的极点密度，数字编码和具有逐渐变化的局部场强的模拟图案。
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公开(公告)号：US5091021A
公开(公告)日：1992-02-25
申请号：US589359
申请日：1990-09-28
IPC分类号： H01F7/02 , C21D1/04 , C21D1/09 , C21D1/34 , C21D8/12 , G01D5/249 , G01P3/487 , H01F1/03 , H01F1/057 , H01F13/00 , H02K1/27 , H02K15/03
CPC分类号： C21D1/04 , C21D1/34 , C21D8/1294 , G01D5/249 , G01P3/487 , H01F1/0306 , H01F1/057 , H02K1/2733 , H02K15/03 , C21D1/09 , C21D2221/00 , Y10S428/928 , Y10T428/12465
摘要： Nonmagnetized permanent magnet material is heated in a pattern by a laser beam to a localized temperature above the Curie point or a temperature sufficient to reduce the coercivity sufficiently for an external field to magnetize the pattern in the direction of the field. Magnets so produced can have very high pole density, digital encoding and analog patterns having gradually varying local field strength. Alternating pole magnets of this type can be used for stepper motor magnets.
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公开(公告)号：US5089060A
公开(公告)日：1992-02-18
申请号：US589352
申请日：1990-09-28
CPC分类号： G06K1/125 , Y10T428/31993
摘要： A permanent magnet is heated in a pattern by a laser beam to a localized temperature above the Curie point or a temperature sufficient to reduce the magnet coercivity sufficiently for the field of the magnet or an external field to remagnetize the pattern in the reverse direction. Magnets so produced can have very high pole density, digital encoding and analog patterns having gradually varying local field strength.
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公开(公告)号：US5631093A
公开(公告)日：1997-05-20
申请号：US789702
申请日：1991-11-08
IPC分类号： H01F7/02 , C21D1/04 , C21D1/09 , C21D1/34 , C21D8/12 , G01D5/249 , G01P3/487 , H01F1/03 , H01F1/057 , H01F13/00 , H02K1/27 , H02K15/03 , H01F1/032
CPC分类号： C21D1/04 , C21D1/34 , C21D8/1294 , G01D5/249 , G01P3/487 , H01F1/0306 , H01F1/057 , H02K1/2733 , H02K15/03 , C21D1/09 , C21D2221/00 , Y10S428/928 , Y10T428/12465
摘要： Nonmagnetized permanent magnet material is heated in a pattern by a laser beam to a localized temperature above the Curie point or a temperature sufficient to reduce the coercivity sufficiently for an external field to magnetize the pattern in the direction of the field. Magnets so produced can have very high pole density, digital encoding and analog patterns having gradually varying local field strength. Alternating pole magnets of this type can be used for stepper motor magnets.
摘要翻译： 非磁化永磁材料通过激光束以图案加热到高于居里点的局部温度或足以降低矫顽力以使外部磁场在场的方向上磁化图案的温度。 如此制造的磁体可以具有非常高的极点密度，数字编码和具有逐渐变化的局部场强的模拟图案。 这种类型的交流磁极可用于步进电机磁铁。
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8.发明授权
公开(公告)号：US5074929A
公开(公告)日：1991-12-24
申请号：US399789
申请日：1989-08-28
CPC分类号： G01D5/147 , G01B7/003 , Y10T29/4902
摘要： A speed sensor is made by assembling a permanent magnet, a soft magnetic layer on the magnet, a magnetoresistive sensor element of the soft magnetic layer, and a toothed ferritic member mounted for movement past the sensor element. The permanent magnet is surface treated to form, in situ, the soft magnetic layer comprising a thin layer of high permeability, low coercivity material. An Nd-Fe-B alloy magnet is surface treated by a laser or electron beam to melt a thin layer which is cooled to resolidify into a soft magnetic material. Rapid cooling achieves an amorphous surface layer having the desired properties. Slow cooling results in the formation of alpha-iron grains which enhance the soft magnetic properties. Iron formation is aided by reacting with an oxidizing atmosphere. Iron alloying by adding iron powder to the molten layer is also discussed.
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公开(公告)号：US5434784A
公开(公告)日：1995-07-18
申请号：US296553
申请日：1994-08-26
申请人： John R. Bradley , Thomas A. Perry , Richard E. Teets , Martin S. Meyer , Jeffrey A. Sell , Thomas H. Van Steenkiste , Frank J. Bohac, Jr. , Jerry S. Roach , Manfred W. Reissmueller , Everett K. Shelton , Dozier: James R. , Hiro Yamasaki
发明人： John R. Bradley , Thomas A. Perry , Richard E. Teets , Martin S. Meyer , Jeffrey A. Sell , Thomas H. Van Steenkiste , Frank J. Bohac, Jr. , Jerry S. Roach , Manfred W. Reissmueller , Everett K. Shelton , Dozier: James R. , Hiro Yamasaki
CPC分类号： B62D15/02
摘要： This invention relates to an apparatus for sensing a vehicle steering wheel position. A permanent magnet target wheel having a global axial magnetic field normal to a first surface is attached to a steering shaft which is rotated by the steering wheel. Multiple regions equally spaced along a common radius on the first surface are magnetically altered and sensed by magnetically responsive sensors positioned adjacent the first radius. A single region positioned within a finite radius along a second radius on the first surface is magnetically altered and sensed by a magnetically responsive sensor positioned adjacent the second radius. The magnetic sensors are responsive to passage of the multiple regions and single region as the target wheel is rotated. Detection of each of the multiple regions corresponds to rotation of the target wheel by an incremental number of degrees. Detection of the single region corresponds to a target wheel position within a predetermined angular range, referred to as the center position. A turn counter is utilized to determine which of the center positions corresponds to the steering wheel neutral position.
摘要翻译： 本发明涉及一种感测车辆方向盘位置的装置。 具有垂直于第一表面的全局轴向磁场的永磁体目标轮被附接到由方向盘旋转的转向轴。 沿着第一表面上的共同半径等距间隔的多个区域被磁性地改变并且被邻近第一半径定位的磁响应传感器感测。 沿着第一表面上的第二半径定位在有限半径内的单个区域被磁性地改变并且被邻近第二半径定位的磁响应传感器感测。 当目标轮旋转时，磁传感器响应于多个区域和单个区域的通过。 多个区域中的每一个的检测对应于目标车轮的旋转增加的数量。 单个区域的检测对应于称为中心位置的预定角度范围内的目标车轮位置。 使用转弯计数器来确定哪个中心位置对应于方向盘中立位置。
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公开(公告)号：US5491632A
公开(公告)日：1996-02-13
申请号：US249409
申请日：1994-05-26
申请人： Andrzej M. Pawlak , William C. Lin , David W. Graber , Dennis C. Eckhardt , Scott E. Weiss , Maged Radamis , Thomas A. Perry , John R. Bradley
发明人： Andrzej M. Pawlak , William C. Lin , David W. Graber , Dennis C. Eckhardt , Scott E. Weiss , Maged Radamis , Thomas A. Perry , John R. Bradley
CPC分类号： B62D15/0215 , B62D15/0245
摘要： A rotary encoder capable of detecting angular rotation of a rotating shaft, and identifying its neutral position without the need for multiple encoder wheels. A magnetoresistive sensor is positioned adjacent the periphery of a single multipole magnet ring attached to a steering wheel shaft. The magnet ring comprises alternating N-pole and S-pole magnetic regions along its periphery, the surface of one of the regions containing a demagnetized portion. The sensor produces a sinusoidal signal as the shaft is rotated, responsive to the passage of the magnetic regions, with a period equal to the passage of two successive magnetic regions adjacent the sensor. The angular position of the shaft which aligns the demagnetized portion adjacent the sensor corresponds to the shaft's neutral position. Aligning of the demagnetized portion adjacent the sensor causes a voltage irregularity within the sensor's otherwise sinusoidal output signal, which is detected by a signal processing circuit.
摘要翻译： 一种旋转编码器，能够检测旋转轴的角度旋转，并且识别其中立位置，而不需要多个编码器轮。 磁阻传感器位于附接到方向盘轴的单个多极磁环的周边附近。 磁环包括沿其周边的交替的N极和S极磁区，其中一个区域的表面包含去磁部分。 当轴旋转时，传感器产生正弦信号，响应于磁区的通过，其周期等于与传感器相邻的两个连续磁区的通过。 将去磁部分对准传感器对准的轴的角位置对应于轴的中立位置。 与传感器相邻的去磁部分的对准导致传感器否则正弦输出信号内的电压不规则，其由信号处理电路检测。
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