公开(公告)号：US5742160A

公开(公告)日：1998-04-21

申请号：US727942

申请日：1996-10-09

申请人： Roderick G. Bergstedt ,  Donald J. Schreiber ,  Thomas G. Klapheke ,  Russell C. Smith

发明人： Roderick G. Bergstedt ,  Donald J. Schreiber ,  Thomas G. Klapheke ,  Russell C. Smith

IPC分类号： G01P3/487 ,  G01B7/30 ,  B60T8/32 ,  G01P15/00

CPC分类号： G01P3/487

摘要： In a preferred embodiment, an apparatus for detecting the angular position, rotational speed, and/or acceleration of a rotatable member, including: an annular magnetic source circumferentially disposed on the rotatable member and rotatable therewith; a directional magnetometer having a toroidal core, disposed at a location in proximity to the magnetic source, with the rotatable member passing through the toroidal core, the directional magnetometer being oriented so as to detect the amplitude and/or change of amplitude of only a tangential magnetic flux field component of the magnetic source, and to provide outputs indicative thereof; and apparatus to receive the outputs and to determine therefrom the angular position, rotational speed, and/or acceleration of the rotatable member.

摘要翻译： 在优选实施例中，一种用于检测可旋转构件的角位置，旋转速度和/或加速度的装置，包括：周向设置在可旋转构件上并随其旋转的环形磁源; 具有环形芯的定向磁力计，其设置在靠近磁源的位置处，可旋转构件通过环形磁芯，定向磁力计被定向成仅检测振幅和/或仅改变振幅的振幅 磁源的磁通量分量，并提供指示其的输出; 以及用于接收输出并由其确定可旋转构件的角位置，旋转速度和/或加速度的装置。

公开(公告)号：US5602472A

公开(公告)日：1997-02-11

申请号：US546343

申请日：1995-10-20

申请人： Roderick G. Bergstedt ,  Donald J. Scheiber ,  Thomas G. Klapheke ,  Russell C. Smith

发明人： Roderick G. Bergstedt ,  Donald J. Scheiber ,  Thomas G. Klapheke ,  Russell C. Smith

IPC分类号： G01P3/487 ,  G01B7/30 ,  B60T8/32

CPC分类号： G01P3/487

摘要： A method of determining the angular position, rotational speed, and/or acceleration of a rotatable member, including: providing on the rotatable member an annular magnetic source generating tangential, radial, and axial magnetic flux field components; detecting, with a directional magnetometer having a toroidal core and two secondary output windings thereon, at a location radially spaced from the magnetic source, in proximity to the magnetic source, the amplitude(s) and/or change of amplitude(s) of one or more of the magnetic flux field components, and providing outputs indicative thereof; modifying the outputs, to equalize measured peak amplitudes of the magnetic flux field components and/or to compensate for environmental distortion thereof, by one or more methods selected from the group consisting of: (1) orienting the toroidal core such that the toroidal core lies in a plane at an angle between the plane of the annular magnetic source and a plane perpendicular to the plane of the annular magnetic source, (2) providing the secondary output windings with unequal numbers of turns, and (3) attentuating one of the outputs; and determining from the outputs the angular position, rotational speed, and/or acceleration of the rotatable member.

摘要翻译： 一种确定可旋转构件的角位置，旋转速度和/或加速度的方法，包括：在可旋转构件上提供产生切向，径向和轴向磁通场分量的环形磁源; 在与磁源径向间隔开的位置处，在与磁源接近的位置处，利用具有环形磁芯和二次输出绕组的定向磁力计检测一个振幅和/或一个振幅的振幅 或更多的磁通量场分量，并提供指示它们的输出; 修改输出，以通过选自以下的一种或多种方法来均衡测量的磁通量分量的峰值振幅和/或补偿其环境变形：（1）定向环形芯，使得环形芯位于 在平面内以环形磁源的平面与垂直于环形磁源平面的平面之间的角度，（2）提供具有不相等匝数的次级输出绕组，以及（3）注意其中一个输出 ; 以及从所述输出确定所述可旋转构件的角位置，旋转速度和/或加速度。