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公开(公告)号：US5187475A
公开(公告)日：1993-02-16
申请号：US712863
申请日：1991-06-10
申请人： Thomas J. Wagener , Paul E. Bjork , James E. Lenz
发明人： Thomas J. Wagener , Paul E. Bjork , James E. Lenz
摘要： A position sensor is provided which incorporates the first and second magnetic members which are attached to an object whose position is to be determined. First and second magnetic sensors are disposed at positions in association with the two magnetic members. As the object moves along a predetermined path, the first and second magnetic members dispose a predetermined amount of magnetic material in the zones of the two sensors. By measuring the changing impedance of the winding of one of the sensors and comparing that value to the impedance of the winding of the other sensor, corrections can be made to determine the position of the object notwithstanding the fact that external effects may have changed the conditions under which the measurements are being taken. For example, gaps between the magnetic members and the sensors can possibly change from one time to another or the ambient temperature surrounding the sensors and the magnetic members could have changed. By comparing the values of the two sensor readings, these variabilities can be factored out of the determination and the accurate position of the object can be measured.
摘要翻译： 提供了一种位置传感器，其包括附接到要确定其位置的物体的第一和第二磁性构件。 第一和第二磁性传感器设置在与两个磁性构件相关联的位置处。 当物体沿预定路径移动时，第一和第二磁性构件在两个传感器的区域中设置预定量的磁性材料。 通过测量其中一个传感器的绕组的变化的阻抗并将该值与另一个传感器的绕组的阻抗进行比较，可以进行校正来确定对象的位置，尽管外部影响可能改变了条件 正在进行测量。 例如，磁性构件和传感器之间的间隙可能会从一个时间改变到另一个，或者传感器周围的环境温度和磁性构件可能已经改变。 通过比较两个传感器读数的值，可以将这些变量除以确定之外，并且可以测量对象的准确位置。
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公开(公告)号：US4857727A
公开(公告)日：1989-08-15
申请号：US193008
申请日：1988-05-12
申请人： James E. Lenz , Paul E. Bjork , Hisatoshi Fujiwara
发明人： James E. Lenz , Paul E. Bjork , Hisatoshi Fujiwara
摘要： An optically powered fiber optic sensor system having a control end sending, with a laser diode or light-emitting diode, optical power and a clock signal exclusively through an optic fiber to a sensing end having sensors, a clock signal picking-off circuit, a return signal light-emitting diode, and needed analog and digital circuitry, all energy dependent upon the optical power transmitted through the optic fiber to the control end. The optically powered sensor end is feasible because of recent advances in technology resulting in micro-powered devices such as the analog-to-digital converter, operational amplifiers, logic circuits, and other low-powered items.
摘要翻译： 具有控制端的光学光纤传感器系统，其具有激光二极管或发光二极管，将光功率和时钟信号专门通过光纤发送到具有传感器的感测端，时钟信号取样电路， 返回信号发光二极管和所需的模拟和数字电路，所有能量取决于通过光纤传输到控制端的光功率。 光学传感器端是可行的，因为技术的最新进步导致诸如模数转换器，运算放大器，逻辑电路和其它低功率产品的微功率器件。
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公开(公告)号：US5642455A
公开(公告)日：1997-06-24
申请号：US555248
申请日：1995-11-08
申请人： Sam Divita , James C. Lee , James E. Lenz
发明人： Sam Divita , James C. Lee , James E. Lenz
CPC分类号： G02B6/4457
摘要： An optical fiber is releasably held in coil or skein form by a magnetized in film coating on the fiber. Adjacent convolutions are held together by a magnetic field to prevent unintended unravelling of the coil, but the fiber can be rapidly played out at high speed without rupture and with a constant release tension force. The magnetic field has a radial and axial component relative to the coil cylinder. A magnetizing apparatus is disclosed for magnetizing the film. A sensor feedback loop can dynamically adjust the reel-out drag force to dampen vibration modes during reel out which can cause tangle.
摘要翻译： 光纤通过纤维上的磁化薄膜涂层可释放地保持为线圈或绞丝形式。 相邻的卷圈通过磁场保持在一起，以防止线圈的意外解开，但是纤维可以高速快速地播放而不会破裂并且具有恒定的释放张力。 磁场相对于线圈筒具有径向和轴向分量。 公开了一种用于使薄膜磁化的磁化装置。 传感器反馈回路可以动态调整卷取阻力，以便在卷取过程中抑制振动模式，从而导致缠结。
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公开(公告)号：US6025711A
公开(公告)日：2000-02-15
申请号：US814948
申请日：1997-03-10
摘要： A proximity sensing circuit is provided with various attributes, including the connection of a proximity sensor coil in a feedback loop of an amplifier, the frequency hopping technique that periodically changes the two frequencies used by its proximity sensor circuit to avoid deleterious interference by constant frequency EMI sources and the provision of a self diagnosis technique. The connection of the proximity sensor coil in the feedback loop of an amplifier results in several advantages including the connection of the coil to a virtually infinite impedance, the reduction of the number of components needed in the proximity sensing circuit and decreased temperature sensitivity of the overall circuit. The frequency hopping technique that periodically changes the two frequencies used by the proximity sensor significantly decreases the likelihood that a constant frequency EMI source in the vicinity of the circuit will have a continually adverse affect on its accuracy and reliability. In applications that require a large number of sensors, the circuit uses a multiplexer with a plurality of sensors and a single filtering network to decrease the necessary number of components in the proximity sensing circuit. Self diagnosis can be performed by using precision resistors or by intelligently monitoring the changing values of the AC impedance, the DC resistance and the compensated resistance, either individually or in combination with each other, to predict certain potential malfunctions.
摘要翻译： 接近感测电路具有各种属性，包括在放大器的反馈环路中连接接近传感器线圈，周期性地改变其接近传感器电路使用的两个频率的跳频技术，以避免由恒定频率EMI引起的有害干扰 来源和提供自我诊断技术。 接近传感器线圈在放大器的反馈回路中的连接产生了几个优点，包括将线圈连接到几乎无限的阻抗，减小接近感测电路中所需的部件数量，降低整体的温度敏感度 电路。 周期性地改变接近传感器使用的两个频率的跳频技术显着降低了电路附近的恒定频率EMI源对其精度和可靠性的不利影响的可能性。 在需要大量传感器的应用中，电路使用具有多个传感器和单个滤波网络的多路复用器来减少接近感测电路中必要数量的组件。 可以通过使用精密电阻进行自诊断，也可以通过智能地监视交流阻抗，直流电阻和补偿电阻的变化值，单独或组合使用，以预测某些潜在的故障。
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公开(公告)号：US4953002A
公开(公告)日：1990-08-28
申请号：US404003
申请日：1989-09-05
申请人： Keith W. Nelson , James E. Lenz , Takeshi Kawai
发明人： Keith W. Nelson , James E. Lenz , Takeshi Kawai
IPC分类号： H01L23/552 , H01L23/58
CPC分类号： H01L23/585 , H01L23/552 , H01L2224/48091 , H01L2224/48247 , H01L24/48 , H01L2924/00014 , H01L2924/01014 , H01L2924/14 , H01L2924/181 , H01L2924/3025
摘要： A housing for integrated circuit structures containing magnetic thin film which has permeable protective layers parallel thereto.
摘要翻译： 一种用于集成电路结构的壳体，其包含与其平行的可渗透保护层的磁性薄膜。
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公开(公告)号：US06791474B2
公开(公告)日：2004-09-14
申请号：US09945494
申请日：2001-08-30
IPC分类号： G08G101
CPC分类号： G08G5/065 , G08G1/042 , G08G5/0082
摘要： A vehicle detecting system and method for use on a specific location such as an airport, including a sensor string nominally perpendicular to the direction of vehicle travel at the location. The sensor string includes at least one magnetic field sensor and a transmitter for transmitting signals from the at least one sensor to a monitoring point. A plurality of sensors is preferred. The transmitter includes a control unit for receiving the signals and a sender for sending the signals to the monitoring point. The preferred magnetic field sensor is a magnetoresisteive sensor having a field range of at least ±5 gauss. A preferred location for the sensor string is in a groove in the surface.
摘要翻译： 一种在诸如机场的特定位置使用的车辆检测系统和方法，包括在该位置处标称地垂直于车辆行驶方向的传感器串。 传感器串包括至少一个磁场传感器和用于将信号从至少一个传感器传输到监控点的发射器。 多个传感器是优选的。 发射机包括用于接收信号的控制单元和用于将信号发送到监测点的发送器。 优选的磁场传感器是具有至少±5高斯的场范围的磁阻传感器。 传感器串的优选位置在表面中的凹槽中。
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7.发明授权Apparatus and method for determining the range and bearing in a plane of an object characterized by an electric or magnetic dipole 失效用于确定以电或磁偶极为特征的物体的平面中的范围和方位的装置和方法
公开(公告)号：US4600883A
公开(公告)日：1986-07-15
申请号：US534448
申请日：1983-09-21
申请人： Werner H. Egli , James E. Lenz
发明人： Werner H. Egli , James E. Lenz
CPC分类号： G01V3/081 , G01R29/0892 , G01R33/02
摘要： Orthogonal components of electromagnetic field perturbations due to objects characterized by electric or magnetic dipoles are measured along orthogonal axes in a plane. The components are proportional with (3 cos.sup.2 .theta.-1) and (3 cos .theta. sin .theta.), where .theta. is the bearing of the dipole center relative to the device for measuring the field components. .theta. is readily determined from these equations and the range of the object can also be determined from knowledge of the dipole moment.
摘要翻译： 沿着平面中的正交轴测量由于由电偶极子或磁偶极子表征的物体的电磁场扰动的正交分量。 这些分量与（3cos2θ-1）和（3cosθsinθ）成比例，其中θ是偶极中心相对于用于测量场分量的装置的方位。 θ可以从这些等式容易地确定，并且物体的范围也可以根据偶极矩的知识来确定。
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公开(公告)号：US5620753A
公开(公告)日：1997-04-15
申请号：US715290
申请日：1996-09-16
申请人： Sam DiVita , James C. Lee , James E. Lenz
发明人： Sam DiVita , James C. Lee , James E. Lenz
CPC分类号： G02B6/4457
摘要： An optical fiber is releasably held in coil or skein form by a magnetized in film coating on the fiber. Adjacent convolutions are held together by a magnetic field to prevent unintended unravelling of the coil, but the fiber can be rapidly played out at high speed without rupture and with a constant release tension force. The magnetic field has a radial and axial component relative to the coil cylinder. A magnetizing apparatus is disclosed for magnetizing the film. A sensor feedback loop can dynamically adjust the reel-out drag force to dampen vibration modes during reel out which can cause tangle.
摘要翻译： 光纤通过纤维上的磁化薄膜涂层可释放地保持为线圈或绞丝形式。 相邻的卷圈通过磁场保持在一起，以防止线圈的意外解开，但是纤维可以高速快速地播放而不会破裂并且具有恒定的释放张力。 磁场相对于线圈筒具有径向和轴向分量。 公开了一种用于使薄膜磁化的磁化装置。 传感器反馈回路可以动态调整卷取阻力，以便在卷取过程中抑制振动模式，从而导致缠结。
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公开(公告)号：US4634977A
公开(公告)日：1987-01-06
申请号：US453196
申请日：1982-12-27
申请人： James E. Lenz , Gordon L. Mitchell
发明人： James E. Lenz , Gordon L. Mitchell
IPC分类号： G01R33/032 , G02F1/01 , G02F1/225
CPC分类号： G01R33/0327 , G02F1/0134 , G02F1/2252 , Y10S505/845
摘要： A method of mapping at least a portion of a magnetic field with an interferometer is presented. The interferometer includes an optical fiber clad with a magnetostrictive material. The approximate direction of the magnetic field lines are determined and the optical fiber is placed substantially transverse to the magnetic field lines. The output of the interferometer is recorded for various positions of the optical fiber. The fiber can be maintained substantially transverse to the magnetic field lines during mapping, or the fiber can be positioned substantially transverse to the field lines to precisely determine the direction of field lines and substantially parallel to the field lines to determine field magnitude. In one embodiment the interferometer is adapted to produce a null output for a predetermined value of the integral of the magnetic field along the length of the optical fiber, and the optical fiber is of uniform construction. In this embodiment, the loci of reference points corresponding to null outputs provides a mapping of points of symmetry in the magnetic field. The direction of magnetic field lines at a point in space is also determined by seeking the minimum output of the interferometer by scanning about the point with the optical fiber.
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公开(公告)号：US06860023B2
公开(公告)日：2005-03-01
申请号：US10724974
申请日：2003-12-01
申请人： Mark T. Manfred , Randolph G. Hartman , James E. Lenz , Kevin D. Vanderwerf , Lawrence C. Vallot
发明人： Mark T. Manfred , Randolph G. Hartman , James E. Lenz , Kevin D. Vanderwerf , Lawrence C. Vallot
IPC分类号： G01C17/38
CPC分类号： G01C17/38
摘要： A method for characterizing distortions in the earth's magnetic field caused by a vehicle having a magnetometer affixed therein is described. The method includes repeatedly measuring the distorted magnetic field utilizing the magnetometer and obtaining a three-dimensional orientation of the vehicle axes with respect to the earth at a time of each magnetometer measurement. The method also includes receiving undistorted earth magnetic field data for the vicinity of the vehicle relative to the earth at the time of each magnetometer measurement and characterizing distortions caused by one or more of the vehicle and magnetometer errors utilizing the magnetic field measurements, the orientations of the vehicle, and the undistorted earth magnetic field data.
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