Thermomagnetic encoding method and articles
    3.
    发明授权
    Thermomagnetic encoding method and articles 失效
    热磁编码方法及制品

    公开(公告)号:US5492571A

    公开(公告)日:1996-02-20

    申请号:US140956

    申请日:1993-10-25

    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。

    Thermomagnetically patterned magnets and method of making same
    7.
    发明授权
    Thermomagnetically patterned magnets and method of making same 失效
    热磁图案磁铁及其制造方法

    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。

    Sensor assembly combining signals with enhanced asymmetry for detecting direction of rotation of an object
    8.
    发明授权
    Sensor assembly combining signals with enhanced asymmetry for detecting direction of rotation of an object 失效
    传感器组合组合具有增强的不对称性的信号以检测物体的旋转方向

    公开(公告)号:US07009384B2

    公开(公告)日:2006-03-07

    申请号:US10453041

    申请日:2003-06-03

    IPC分类号: G01B7/30 G01P13/00

    CPC分类号: G01D5/147 G01P3/488 G01P13/04

    摘要: A target wheel sensor assembly includes a target wheel, a magnet, and two or more sensing elements placed therebetween. The magnet and the sensing elements are configured so that as the target wheel rotates each of the sensing elements outputs a respective asymmetric signal relative to the direction of rotation of the target wheel or an object mechanically connected to the wheel. Each of these asymmetric signals is differentially combined with one another to determine the direction of motion of the target wheel, and, if optionally desired, the position of the target wheel.

    摘要翻译: 目标轮传感器组件包括目标轮,磁体和放置在它们之间的两个或更多个传感元件。 磁体和感测元件构造成使得当目标轮旋转每个感测元件时,相对于目标轮或机械地连接到车轮的物体的旋转方向输出相应的不对称信号。 这些不对称信号中的每一个彼此差分地组合以确定目标车轮的运动方向,并且如果可选地,确定目标车轮的位置。

    Magnetic sensor array configuration for measuring a position and method of operating same
    10.
    发明授权
    Magnetic sensor array configuration for measuring a position and method of operating same 失效
    用于测量位置的磁传感器阵列配置及其操作方法

    公开(公告)号:US06992479B2

    公开(公告)日:2006-01-31

    申请号:US10356457

    申请日:2003-01-31

    IPC分类号: G01B7/14

    CPC分类号: G01D5/145

    摘要: A magnetic position sensor for measuring a position of a ferromagnetic target over a range. The sensor comprises a magnet at least as long as the range and a sensor array mounted upon a surface of the magnet. The array is at least as long as the range and includes a plurality of sensing elements mounted a fixed distance from the surface of the magnet. The magnet length and the fixed distance have values such that a set of relatively constant values, preferably values of magnetic flux density, is measurable in the sensor array in the absence of the ferromagnetic target. A method of making a position sensor is also disclosed, as is a method of measuring the position of a ferromagnetic target over a range.

    摘要翻译: 一种磁性位置传感器,用于在一个范围内测量铁磁性目标的位置。 传感器包括至少与该范围一样长的磁体和安装在磁体表面上的传感器阵列。 该阵列至少与该范围一样长,并且包括从磁体表面安装固定距离的多个感测元件。 磁体长度和固定距离具有这样的值,使得在不存在铁磁性目标的情况下,可以在传感器阵列中测量一组相对恒定的值,优选磁通密度值。 还公开了一种制造位置传感器的方法,以及在一个范围上测量铁磁性靶的位置的方法。