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1. 发明授权

US5754042A Magnetoresistive encoder for tracking the angular position of a rotating ferromagnetic target wheel 失效
标题翻译：用于跟踪旋转铁磁目标轮的角位置的磁阻编码器
公开(公告)号：US5754042A
公开(公告)日：1998-05-19
申请号：US262097
申请日：1994-06-20
申请人： Thaddeus Schroeder , Bruno Patrice Bernard Lequesne , Hiro Yamasaki
发明人： Thaddeus Schroeder , Bruno Patrice Bernard Lequesne , Hiro Yamasaki
IPC分类号： G01B7/30 , G01D5/14 , G01D5/16 , G01D5/249 , H01L43/08
CPC分类号： G01D5/147 , G01B7/30 , G01D5/2497
摘要： An apparatus for detecting precise angular positions of a rotating object. Two magnetoresistors (MRs) are positioned adjacent a target wheel attached to the rotating object, the target wheel having at least one element of finite length. Each MR is responsive to the passage of at least one of the elements as the target wheel is rotated, generating an analog signal with signal transitions between two voltage levels at the passage of the element's leading and trailing edges. The MRs are positioned relative to the elements such that their signals are phase shifted with respect to one another, resulting in time overlapping signals which intersect at a precise angular positions of the target wheel.
摘要翻译：一种用于检测旋转物体的精确角位置的装置。两个磁阻电阻器（MR）被定位成与附接到旋转物体的目标轮相邻，目标轮具有至少一个有限长度的元件。当目标轮旋转时，每个MR响应于至少一个元件的通过，在元件的前缘和后缘通过时产生具有两个电压电平之间的信号转换的模拟信号。 MR相对于元件定位，使得它们的信号相对于彼此相移，导致与目标轮的精确角位置相交的时间重叠信号。

2. 发明授权

US06993983B2 Universal magnetostrictive force sensor 失效
标题翻译：通用磁致伸缩力传感器
公开(公告)号：US06993983B2
公开(公告)日：2006-02-07
申请号：US10313660
申请日：2002-12-06
申请人： Bruno Patrice Bernard Lequesne , Donald T. Morelli , Thaddeus Schroeder , Thomas Wolfgang Nehl , Thomas Allen Baudendistel
发明人： Bruno Patrice Bernard Lequesne , Donald T. Morelli , Thaddeus Schroeder , Thomas Wolfgang Nehl , Thomas Allen Baudendistel
IPC分类号： G01L1/12
CPC分类号： G01L1/127 , G01L1/125
摘要： A magnetostrictive force sensor universally usable in any environment with similar signals unaffected by the surrounding material. To this end, a sensor comprising a shaft of magnetostrictive material with an inductance coil wound around the shaft is provided with a magnetic shell enclosing the coil only or both the coil and the shaft. Upon application of the magnetic field, the resultant flow of magnetic flux is confined to a path through the shaft and the magnetic shell. By confining the magnetic flux path, the dependency of the sensor signal on the surrounding material and environment is essentially eliminated.
摘要翻译：一种磁致伸缩力传感器，可在任何环境中使用，具有不受周围材料影响的相似信号。为此，包括具有卷绕在轴上的电感线圈的磁致伸缩材料轴的传感器设置有只包围线圈或线圈和轴两者的磁性壳。在施加磁场时，所产生的磁通流被限制在通过轴和磁性壳的路径上。通过限制磁通路径，基本上消除了传感器信号对周围材料和环境的依赖性。

3. 发明授权

US06614223B2 Analog angle encoder having a single piece magnet assembly surrounding an air gap 失效
标题翻译：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。

4. 发明授权

US5668471A Rotational sensor with robust axial alignment tolerance 失效
标题翻译：旋转传感器具有鲁棒的轴向对准公差
公开(公告)号：US5668471A
公开(公告)日：1997-09-16
申请号：US578305
申请日：1995-12-26
申请人： Bruno Patrice Bernard Lequesne , Thaddeus Schroeder
发明人： Bruno Patrice Bernard Lequesne , Thaddeus Schroeder
IPC分类号： G01D5/14 , G01D5/16 , G01B7/30 , G01B7/14 , G01D5/12
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。

5. 发明授权

US5916459A Method of matching magnetoresistors in a sensor assembly 失效
标题翻译：传感器组件中磁阻电阻的匹配方法
公开(公告)号：US5916459A
公开(公告)日：1999-06-29
申请号：US919544
申请日：1997-08-28
申请人： Thaddeus Schroeder , Thomas Arthur Perry , Martin Stephen Meyer , Bruno Patrice Bernard Lequesne
发明人： Thaddeus Schroeder , Thomas Arthur Perry , Martin Stephen Meyer , Bruno Patrice Bernard Lequesne
IPC分类号： B23K76/00
CPC分类号： B23K26/0066 , B23K26/0006 , B23K2201/36 , B23K2203/50
摘要： A method is disclosed for equalizing the electrical resistance of two or more magnetoresistor sensor elements positioned on a permanent magnet in a sensor assembly. The method may utilize a laser to reduce the magnetic field of the portion of the permanent magnet underlying the sensor with the higher electrical resistance.
摘要翻译：公开了一种用于均衡位于传感器组件中的永磁体上的两个或更多个磁电阻传感器元件的电阻的方法。该方法可以利用激光器以更高的电阻来减小传感器下面的永久磁体的部分的磁场。

6. 发明授权

US5731702A High accuracy angle based rotation sensor with time based back up 失效
标题翻译：基于高精度角度的旋转传感器，具有基于时间的备份
公开(公告)号：US5731702A
公开(公告)日：1998-03-24
申请号：US701254
申请日：1996-08-21
申请人： Thaddeus Schroeder , Bruno Patrice Bernard LeQuesne , Raymond Ora Butler, Jr. , Anthony Leo Marks
发明人： Thaddeus Schroeder , Bruno Patrice Bernard LeQuesne , Raymond Ora Butler, Jr. , Anthony Leo Marks
IPC分类号： G01D5/249 , H03M1/06 , H03M1/28 , G01B7/30 , F02P7/067 , G01P3/489 , H03M1/22
CPC分类号： G01D5/2497 , G01D5/2492 , H03M1/0685 , H03M1/28
摘要： A rotation sensor includes a binary encoded target wheel and a pair of sensors disposed about the target wheel periphery. One of the sensors provides a signal indicative of the passage of regular angular intervals of the target wheel and the other of the sensors provides binary states corresponding to the regular angular intervals.
摘要翻译：旋转传感器包括二进制编码目标轮和围绕目标轮周边设置的一对传感器。一个传感器提供指示目标轮的规则角度间隔通过的信号，另一个传感器提供对应于规则角度间隔的二进制状态。

7. 发明授权

US06577123B2 Linear position sensor assembly 失效
公开(公告)号：US06577123B2
公开(公告)日：2003-06-10
申请号：US09873857
申请日：2001-06-04
申请人： Thaddeus Schroeder , Bruno Patrice Bernard Lequesne , Avoki M. Omekanda
发明人： Thaddeus Schroeder , Bruno Patrice Bernard Lequesne , Avoki M. Omekanda
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.

8. 发明授权

US06566867B1 Binary encoded crankshaft target wheel with single VR sensor 失效
标题翻译：二进制编码曲轴目标车轮与单个VR传感器
公开(公告)号：US06566867B1
公开(公告)日：2003-05-20
申请号：US09339699
申请日：1999-06-24
申请人： Thaddeus Schroeder , Bruno Patrice Bernard Lequesne
发明人： Thaddeus Schroeder , Bruno Patrice Bernard Lequesne
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。

9. 发明授权

US06320374B1 Angular position and angular direction sensor 失效
标题翻译：角位置和角度方向传感器
公开(公告)号：US06320374B1
公开(公告)日：2001-11-20
申请号：US09339450
申请日：1999-06-24
申请人： Thaddeus Schroeder , Bruno Patrice Bernard Lequesne
发明人： Thaddeus Schroeder , Bruno Patrice Bernard Lequesne
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。

10. 发明授权

US06268721B1 Low cost binary encoded crankshaft position sensor 失效
标题翻译：低成本二进制编码曲轴位置传感器
公开(公告)号：US06268721B1
公开(公告)日：2001-07-31
申请号：US09250826
申请日：1999-02-17
申请人： Thaddeus Schroeder , Raymond O. Butler, Jr. , Bruno Patrice Bernard Lequesne
发明人： Thaddeus Schroeder , Raymond O. Butler, Jr. , Bruno Patrice Bernard Lequesne
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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