公开(公告)号：US06636036B1

公开(公告)日：2003-10-21

申请号：US09030144

申请日：1998-02-25

申请人： Thaddeus Schroeder ,  John Wesley Hile

发明人： Thaddeus Schroeder ,  John Wesley Hile

IPC分类号： G01B700

CPC分类号： G01D5/147 ,  G01D1/18

摘要： In a magnetoresistive sensor employing a single stage comparator circuit for signal threshold detection, an hysteresis deadband is established substantially proportional to signal amplitude. The sensor includes a transducer comprising at least one magnetoresistive element and an hysteresis circuit also including the at least one magnetoresistive element.

摘要翻译： 在使用用于信号阈值检测的单级比较器电路的磁阻传感器中，建立与信号幅度基本成比例的滞后死区。 传感器包括包括至少一个磁阻元件和还包括至少一个磁阻元件的磁滞回线的换能器。

公开(公告)号：US06486656B1

公开(公告)日：2002-11-26

申请号：US09413420

申请日：1999-10-06

申请人： Thaddeus Schroeder

发明人： Thaddeus Schroeder

IPC分类号： G01B730

CPC分类号： G01D5/147

摘要： A galvanomagnetic position sensor (36, 18) wherein a single die MR sensor (22, 22′) senses the rotation of an end face (14) of a motor shaft (12) which is made of a ferromagnetic material and generates three sinusoidal voltage signals with 120 degree phase shifts. In a first implementation, an MR die incorporating a plurality of matched pie-shaped MR elements (MR1, MR2, MR3, MR4, MR5, MR6) collectively form a circular area. When the motor shaft rotates, a tooth (18) of the end face sweeps past the MR elements resulting in resistance modulation of each MR element between a maximum resistance and a minimum resistance whereby three sinusoidal voltage signals spaced 120 degrees apart are provided, via OpAmps (AMP1, AMP2, AMP3) or voltage dividers and OpAmps (AMP1′, AMP2′). From these voltage signals the shaft rotative position is known. In a second implementation of the present invention, the single MR sensor consists of an MR die (22″) wherein each of a plurality of MR elements (23″) consists of three interdigitated electrically isolated MR segments collectively forming a circular area, wherein OpAmps are obviated and the sensor circuit is totally passive.

摘要翻译： 一种电磁位置传感器（36,18），其中单个模具MR传感器（22,22'）感测由铁磁材料制成的电动机轴（12）的端面（14）的旋转，并且产生三个正弦电压 信号具有120度相移。 在第一实施方案中，包含多个匹配的饼形MR元件（MR1，MR2，MR3，MR4，MR5，MR6）的MR管芯共同形成圆形区域。 当电机轴旋转时，端面的齿（18）扫过MR元件，导致每个MR元件在最大电阻和最小电阻之间的电阻调制，从而通过OpAmps提供间隔120度的三个正弦电压信号 （AMP1，AMP2，AMP3）或分压器和OpAmps（AMP1'，AMP2'）。 从这些电压信号，轴旋转位置是已知的。 在本发明的第二实施方案中，单个MR传感器由MR管芯（22“）组成，其中多个MR元件（23”）中的每一个由三​​个叉指电隔离的MR段组成，共同形成圆形区域， 其中OpAmps被消除并且传感器电路是完全被动的。

公开(公告)号：US06338190B1

公开(公告)日：2002-01-15

申请号：US09576002

申请日：2000-05-22

申请人： Robin Stevenson ,  Thaddeus Schroeder

发明人： Robin Stevenson ,  Thaddeus Schroeder

IPC分类号： B23P1100

CPC分类号： G01P3/487 ,  G01P1/00 ,  G01P1/04 ,  Y10T29/4984 ,  Y10T29/49902 ,  Y10T74/1892 ,  Y10T403/1616 ,  Y10T403/32532

摘要： A two-component bracket and drive washer combination which provides secure holding of a magnetic sensor while automatically setting an optimal air gap, wherein operation is very quick, easy and reliable and wherein the air gap setting is precisely repeated each time a magnetic sensor is replaced or re-installed. A main bracket component has an aperture and a drive wall at one end of the aperture. A sensor body is connected to the main bracket component and is allowed to touch a reluctor. A reaction bracket has a reaction wall in the aperture opposite the drive wall and is restrained from moving. A drive washer is provided with teeth having a pitch whereby as the washer is pressed between the drive and reaction walls along a transverse axis, the main bracket component is forced to move along a longitudinal axis, thereby moving the sensor body in relation to the reluctor an amount precisely equal to a desired air gap.

摘要翻译： 一种双组件支架和驱动垫圈组合，可在自动设置最佳气隙的同时提供牢固的磁传感器保持，其中操作非常快速，简单可靠，并且每次更换磁传感器时，气隙设定都会精确重复 或重新安装。 主支架部件在孔的一端具有孔和驱动壁。 传感器主体连接到主支架部件并被允许接触去磁头。 反作用支架在与驱动壁相对的孔中具有反作用壁，并被限制移动。 驱动垫圈设置有具有螺距的齿，由此当沿着横向轴线将垫圈按压在驱动器和反作用壁之间时，主支架部件被迫沿着纵向轴线移动，从而使传感器主体相对于排列器移动 精确地等于所需气隙的量。

公开(公告)号：US06310474B1

公开(公告)日：2001-10-30

申请号：US09283359

申请日：1999-03-31

申请人： Thaddeus Schroeder

发明人： Thaddeus Schroeder

IPC分类号： G01B714

CPC分类号： G01D5/147

摘要： A direction of rotation detection apparatus and method using the outputs of a single differential sequential sensor employing two matched magnetostatic elements, ie., either Hall elements or magnetoresistors (MRs), to extract direction of rotation information from the passage of a single tooth edge of a target wheel. The two matched sensing elements are spaced in close proximity to each other, preferably on the order preferably of about 1 mm to about 2 mm apart, in the circumferential direction of the target wheel and generate two identical angularly offset signals from the passage of a single tooth edge of a 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 polarity of the differential signal enables one of two comparators with respective reference voltages. The output of the enabled comparator is processed and converted into a digital output signal whose voltage level indicates the direction of rotation of the target wheel.

摘要翻译： 使用采用两个匹配的静磁元件（即霍尔元件或磁阻器（MR））的单个差分顺序传感器的输出的旋转检测装置和方法从单个齿边缘的通道中提取旋转信息的方向 目标轮。 两个匹配的感测元件在目标轮的圆周方向上彼此靠近地优选地间隔开，优选地在大约1mm到大约2mm之间的顺序上，并且产生两个相同的角度偏移信号， 目标轮的齿缘被输入到信号调节电路。 在信号调理电路中，两个传感器信号被差分放大以产生差分信号，由此差分信号的极性使两个比较器之一具有各自的参考电压。 使能的比较器的输出被处理并转换为数字输出信号，其电压电平指示目标轮的旋转方向。

公开(公告)号：US06208176B1

公开(公告)日：2001-03-27

申请号：US09156139

申请日：1998-09-17

申请人： Thaddeus Schroeder ,  Joseph Pierre Heremans

发明人： Thaddeus Schroeder ,  Joseph Pierre Heremans

IPC分类号： H03K300

CPC分类号： G01D5/147 ,  G01R33/09

摘要： An adaptive driver circuit which uses a modified conventional current mirror circuit to provide a current source employing an automatically adjustable current to compensate for decreased SMR device sensitivity at higher temperatures and large air gaps without the need for an active feedback circuit. The adaptive driver circuit according to the present invention is a unique modification of a current mirror circuit in that an SMR device is used as the reference resistor and a fixed resistor in the mirrored circuit to generate an output voltage. A modification is also possible whereby two adaptive driver circuits are used in a differential mode.

摘要翻译： 一种自适应驱动器电路，其使用改进的常规电流镜电路来提供使用自动可调电流的电流源，以补偿在较高温度和大气隙处降低的SMR器件灵敏度，而不需要主动反馈电路。 根据本发明的自适应驱动器电路是电流镜电路的唯一修改，因为SMR器件用作参考电阻器，并且在镜像电路中使用固定电阻器来产生输出电压。 在差分模式中也可以使用两个自适应驱动电路的修改。

公开(公告)号：US06181128B2

公开(公告)日：2001-01-30

申请号：US09162076

申请日：1998-09-28

申请人： Thaddeus Schroeder

发明人： Thaddeus Schroeder

IPC分类号： G01B714

CPC分类号： G01D5/147 ,  G01F1/28 ,  G01R33/09

摘要： A magnetic sensor for measuring a physical property that can be translated into the flexing of a beam. The sensor includes a support extending outward from a base to a distal portion. A beam is fixed to the distal portion and extends inward therefrom to a free end of the beam adjacent the base. A pair of matched magnetic sensing elements are mounted on the base adjacent the free end of the beam which is nominally centered between the sensing elements. A magnetic field means is disposed against the magnetic sensing elements and at the free end of the beam. The free end of the beam is resiliently connected with the base through the beam and the support whereby force applied against the beam may move the free end closer to one and further from the other of the sensing elements. A differential signal is generated between the sensing elements by connecting a driving means to the sensing elements. The differential signal indicates the various positions of the free end of the beam. The positions of the free end can be used to determine various characteristics of the applied force.

摘要翻译： 一种磁传感器，用于测量可转化为光束弯曲的物理性质。 传感器包括从基座向远端部分向外延伸的支撑件。 梁固定到远侧部分并且从其向内延伸到邻近基部的梁的自由端。 一对匹配的磁感应元件安装在邻近梁的自由端的基座上，其名义上位于感测元件之间的中心。 磁场装置设置成抵靠磁感应元件并在光束的自由端处。 梁的自由端通过梁和支撑件与基部弹性连接，由此施加在梁上的力可以使自由端移动到更靠近另一个感测元件的位置。 通过将驱动装置连接到感测元件，在感测元件之间产生差分信号。 差分信号表示光束自由端的各种位置。 自由端的位置可用于确定施加力的各种特性。

公开(公告)号：US6100682A

公开(公告)日：2000-08-08

申请号：US162077

申请日：1998-09-28

申请人： Thaddeus Schroeder

发明人： Thaddeus Schroeder

IPC分类号： G01B7/30 ,  G01D5/14 ,  G01D5/16 ,  G01D5/245 ,  G01P3/488 ,  G01R33/09

CPC分类号： G01D5/147 ,  G01B7/30 ,  G01D5/2451 ,  G01P3/488

摘要： A device for sensing angular positions of a rotating ferromagnetic target wheel which has teeth and slots along its periphery. A magnetic sensor is positioned adjacent the target wheel. The sensor has a biasing magnet and three sensing elements mounted on the biasing magnet. The sensing elements are sequentially positioned and equally spaced such that their output signals are equally phase shifted by an angle corresponding to their positions. Each sensing element is responsive to the passage of each tooth adjacent the sensing element. The leading and trailing edges of each tooth represent an angular position of the target wheel. Transition points between the leading and trailing edges are determined by obtaining differential signals between the first sensing element and the second sensing element and between the second sensing element and the third sensing element and then finding their crossover points. The crossover points are used to determine the angular positions of the target wheel.

摘要翻译： 用于检测旋转铁磁目标轮的角位置的装置，其沿着其周边具有齿和槽。 磁传感器位于目标轮附近。 传感器具有偏置磁体和安装在偏置磁体上的三个感测元件。 感测元件依次定位和等间隔，使得它们的输出信号被相等移位相应于其位置的角度。 每个感测元件响应于邻近感测元件的每个齿的通过。 每个齿的前缘和后缘表示目标轮的角位置。 通过获得第一感测元件和第二感测元件之间以及第二感测元件和第三感测元件之间的差分信号，然后找到它们的交叉点来确定前缘和后缘之间的转换点。 交叉点用于确定目标车轮的角度位置。

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。

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。

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。