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1. 发明授权

US6064198A Gear tooth sensor with improved resolution and stability 失效
标题翻译：齿轮传感器具有改进的分辨率和稳定性
公开(公告)号：US6064198A
公开(公告)日：2000-05-16
申请号：US911175
申请日：1997-08-14
申请人： Ronald J. Wolf , Larry Hedeen
发明人： Ronald J. Wolf , Larry Hedeen
IPC分类号： G01D5/14 , G01P3/488 , G01B7/14 , G01B7/30 , G01R33/025
CPC分类号： G01D5/147 , G01P3/488
摘要： A gear tooth sensor having increased sensitivity and temperature tolerance enables relatively small ferrous targets to be detected, which lends itself for use in relatively compact applications, such as the sensing of an automotive cam shaft drive wheel. All of the embodiments include a magnet having opposing north and south pole faces and a single input Hall effect IC which defines a sensing plane, and may include one or more flux concentrators. In one embodiment the sensor is configured such that the magnet is disposed adjacent the periphery of the target wheel such that the magnetic axis is generally parallel to the direction of travel of the ferrous target at an instant when the ferrous target is adjacent the magnet. In this embodiment, the Hall effect IC and flux concentrator are disposed adjacent one side of the ferrous target wheel and at least partially below the magnet. In one alternate embodiment of the invention, the magnet, Hall effect IC and flux concentrator are all aligned and disposed such that the magnetic axis is generally parallel to the direction of travel of the ferrous target at an instant when the ferrous target is adjacent the magnet. As such, the alternate embodiment is adapted to be configured relative to the ferrous target wheel for different applications. In both embodiments, additional flux concentrators can be included for adjusting the operate points of the Hall effect IC's. In yet other embodiments, the sensor is configured such that the sensing plane of the IC is generally perpendicular to the magnetic axis.
摘要翻译：具有增加的灵敏度和温度公差的齿轮齿传感器使得能够检测相对较小的铁物体，其适用于相对紧凑的应用中，例如感测汽车凸轮轴驱动轮。所有实施例包括具有相对的北极和南极面的磁体和限定感测平面的单个输入霍尔效应IC，并且可以包括一个或多个磁通集中器。在一个实施例中，传感器被配置为使得磁体邻近目标轮的周边设置，使得当铁基靶相邻于磁体时，磁轴大致平行于铁物体的行进方向。在本实施例中，霍尔效应IC和通量集中器设置在铁质目标轮的一侧附近并且至少部分地位于磁体下方。在本发明的一个替代实施例中，磁铁，霍尔效应IC和磁通集中器都被对准和布置，使得磁铁轴线大致平行于铁基金属物体在铁基金属物体相邻磁铁的时刻的行进方向。因此，替代实施例适于相对于用于不同应用的铁质目标轮构造。在两个实施例中，可以包括另外的通量集中器来调节霍尔效应IC的工作点。在其他实施例中，传感器被配置为使得IC的感测平面大致垂直于磁轴。

2. 发明授权

US5332965A Contactless linear angular position sensor having an adjustable flux concentrator for sensitivity adjustment and temperature compensation 失效
标题翻译：非接触式线性角位置传感器，具有可调式磁通集中器，用于灵敏度调节和温度补偿
公开(公告)号：US5332965A
公开(公告)日：1994-07-26
申请号：US902075
申请日：1992-06-22
申请人： Ronald J. Wolf , Larry Hedeen
发明人： Ronald J. Wolf , Larry Hedeen
IPC分类号： F02D9/00 , F02D35/00 , G01B7/00 , G01B7/30 , G01D3/02 , G01D3/028 , G01D3/036 , G01D5/14 , G01B7/14 , G01R35/00
CPC分类号： G01D3/02 , G01D3/0365 , G01D5/145
摘要： An angular position sensor for sensing the angular position of a pivotally mounted device includes a magnetically sensitive device, such as a Hall effect IC, and a plurality of flux concentrators, rigidly disposed relative to the Hall effect IC, forming an assembly. The assembly is disposed in a housing a fixed distance from a rotatably mounted standard magnet defining a fixed air gap therebetween. The magnet is disposed in rotatably mounted magnet holder which also acts as a drive arm that is adapted to be mechanically coupled to a pivotally mounted device. The configuration of the flux concentrators assembled to the magnetically sensitive device cause the output of the Hall effect IC to be generally linear. In order to avoid problems associated with electrically adjustable angular position sensors, the angular position sensor in accordance with the present invention is adjusted mechanically. In particular, a flux concentrator, preferably having a halo shape, is disposed adjacent the magnet. The sensor is calibrated by varying the distance between the halo-shaped flux concentrator and the magnet. In one embodiment of the invention, the halo-shaped flux concentrator is formed to provide temperature compensation for the sensor. The sensor is hermetically sealed and is thus unaffected by wear or vibration.
摘要翻译：用于感测枢转安装的装置的角位置的角度位置传感器包括一个磁性敏感装置，例如霍尔效应IC，以及相对于霍尔效应IC刚性地布置的多个磁通集中器。组件设置在与可旋转地安装的标准磁体固定距离的壳体中，在其间限定了固定的气隙。磁体设置在可旋转地安装的磁体保持器中，其也用作驱动臂，该驱动臂适于机械地联接到枢转安装的装置。组装到磁敏装置上的集流器的配置使得霍尔效应IC的输出通常是线性的。为了避免与电动可调角度位置传感器相关的问题，机械地调节了根据本发明的角度位置传感器。特别地，优选具有卤素形状的通量集中器设置在磁体附近。传感器通过改变卤素状集中器与磁铁之间的距离进行校准。在本发明的一个实施例中，形成了卤素状磁通集中器，以为传感器提供温度补偿。传感器密封，因此不受磨损或振动的影响。

3. 发明授权

US5497081A Mechanically adjustable linear-output angular position sensor 失效
标题翻译：机械可调线性输出角位置传感器
公开(公告)号：US5497081A
公开(公告)日：1996-03-05
申请号：US51412
申请日：1993-04-28
申请人： Ronald J. Wolf , Larry Hedeen
发明人： Ronald J. Wolf , Larry Hedeen
IPC分类号： F02D9/00 , F02D35/00 , G01B7/00 , G01B7/30 , G01D3/02 , G01D3/028 , G01D3/036 , G01D5/14 , G01B7/14 , G01R35/00
CPC分类号： G01D5/145 , G01D3/02 , G01D3/0365
摘要： An angular position sensor for sensing the angular position of a pivotally mounted device includes a magnetically sensitive device, such as a Hall effect IC, and a plurality of flux concentrators, rigidly disposed relative to the Hall effect IC, forming an assembly. The assembly is disposed in a housing a fixed distance from a rotatably mounted standard magnet defining a fixed air gap therebetween. The magnet is disposed in rotatably mounted magnet holder which also acts as a drive arm that is adapted to be mechanically coupled to a pivotally mounted device. The configuration of the flux concentrators assembled to the magnetically sensitive device cause the output of the Hall effect IC to be generally linear. In order to avoid problems associated with electrically adjustable angular position sensors, the angular position sensor in accordance with the present invention is adjusted mechanically. In particular, a flux concentrator, preferably having a halo shape, is disposed adjacent the magnet. The sensor is calibrated by varying the distance between the halo-shaped flux concentrator and the magnet. In one embodiment of the invention, the halo-shaped flux concentrator is formed to provide temperature compensation for the sensor. The sensor is hermetically sealed and is thus unaffected by wear or vibration. In an alternative embodiment, a circular magnet with a central aperture is utilized. In order to reduce the overall length of the sensor, the magnetic sensing element is disposed within the central aperture.
摘要翻译：用于感测枢转安装的装置的角位置的角度位置传感器包括一个磁性敏感装置，例如霍尔效应IC，以及相对于霍尔效应IC刚性地布置的多个磁通集中器。组件设置在与可旋转地安装的标准磁体固定距离的壳体中，在其间限定了固定的气隙。磁体设置在可旋转地安装的磁体保持器中，其也用作驱动臂，该驱动臂适于机械地联接到枢转安装的装置。组装到磁敏装置上的集流器的配置使得霍尔效应IC的输出通常是线性的。为了避免与电动可调角度位置传感器相关的问题，机械地调节了根据本发明的角度位置传感器。特别地，优选具有卤素形状的通量集中器设置在磁体附近。传感器通过改变卤素状集中器与磁铁之间的距离进行校准。在本发明的一个实施例中，形成了卤素状磁通集中器，以为传感器提供温度补偿。传感器密封，因此不受磨损或振动的影响。在替代实施例中，使用具有中心孔的圆形磁体。为了减小传感器的总长度，磁感应元件设置在中心孔内。

4. 发明授权

US4970463A Temperature stable proximity sensor with sensing of flux emanating from the lateral surface of a magnet 失效
标题翻译：温度稳定的接近传感器，感测从磁体侧面发出的磁通
公开(公告)号：US4970463A
公开(公告)日：1990-11-13
申请号：US322518
申请日：1989-03-13
申请人： Ronald J. Wolf , Larry Hedeen
发明人： Ronald J. Wolf , Larry Hedeen
IPC分类号： G01B7/00 , G01D5/245 , G01V3/08
CPC分类号： G01V3/08
摘要： A ferrous object sensor assembly is capable of sensing the presence or absence of an object of high magnetic permeability, such as a tooth or notch on a rotatably mounted ferrous wheel at zero speed and immediately upon power-up and, thus, may also be used as a proximity sensor. The ferrous object sensor assembly is comprised of a permanent magnet and a magnetic flux responsive sensor having a sensing plane which produces an electrical output signal which varies as a function of the change in magnetic flux density. The ferrous body sensor assembly does not rely upon pole face magnetism as some known conventional sensors but, rather, relies upon a the radial component of magnetic flux density emanating from a lateral surface of the magnet, intermediate opposing pole faces. Since the ferrous object sensor assembly does not rely on pole face magnetism, its electrical output signal is relatively stable over a relatively wide temperature range.

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