Magnetic field detection
    2.
    发明授权
    Magnetic field detection 失效
    磁场检测

    公开(公告)号:US5528067A

    公开(公告)日:1996-06-18

    申请号:US438132

    申请日:1995-05-08

    申请人: Joseph E. Farb

    发明人: Joseph E. Farb

    IPC分类号: G01R33/07 H01L29/82 H01L43/00

    CPC分类号: G01R33/07 Y10S73/02

    摘要: A solid state triode employs the Hall effect to asymmetrically proportion flow of current through different branches of a number of cascaded bifurcated N- charge carrier channels (10,18,20), thereby providing an indication of strength and direction of an applied magnetic field by measuring magnitude and sense of the difference between currents flowing in the two channel branches (14,16,24,26,30,32). The solid state triode is formed on an silicon-on-insulator (SOI) substrate (47,48,49) in which an N+ source region (54) and at least two end N+ drain regions (56,58) are interconnected by an N- charge carrier channel (60) that is defined by a plurality of P+ regions (64a,64b,64c,64d) in a thin single crystal silicon substrate (49) between the source and drain regions (54,56,58). A polysilicon gate (52) overlies the N- channel and acts as a self-aligning mask during manufacture of the triode to precisely align the N+ and P+ doping to the polysilicon gate configuration. The SOI has a very thin N- doped layer to which the N+ and P+ doping is applied in steps of successively different energy levels so that the doping extends completely through the N- layer and is uniform throughout the thickness of the layer. The N- channel is narrow and has a width at least twice the thickness of the crystal silicon uppermost layer of the SOI substrate.

    摘要翻译: 固态三极管采用霍尔效应使不对称比例的电流流过多个级联分叉的N-电荷载流子通道(10,18,20)的不同分支,由此提供施加磁场强度和方向的指示, 测量在两个通道分支(14,16,24,26,30,32)中流动的电流之间的差异的大小和感觉。 固体三极管形成在绝缘体上硅(SOI)衬底(47,48,49)上,其中N +源极区(54)和至少两个末端N +漏极区(56,58)通过 在源极和漏极区域之间的薄单晶硅衬底(49)中由多个P +区域(64a,64b,64c,64d)限定的N-电荷载流子通道(60)。 多晶硅栅极(52)覆盖N沟道,并且在制造三极管期间用作自对准掩模,以将N +和P +掺杂精确对准到多晶硅栅极配置。 SOI具有非常薄的N掺杂层,其中N +和P +掺杂以相继不同的能级逐步施加,使得掺杂完全延伸穿过N层,并且在层的整个厚度上是均匀的。 N沟道窄,并且具有SOI衬底的晶体硅最上层的厚度的至少两倍的宽度。

    Magnetomechanical sensor attachment method
    3.
    发明授权
    Magnetomechanical sensor attachment method 失效
    磁力传感器附件法

    公开(公告)号:US5347872A

    公开(公告)日:1994-09-20

    申请号:US900045

    申请日:1986-08-25

    申请人: Arthur E. Clark

    发明人: Arthur E. Clark

    IPC分类号: G01B7/24

    CPC分类号: G01B7/24 Y10S73/02

    摘要: A method of measuring strain in material by(1) selecting a metallic glass ribbon of the compositionFe.sub.w B.sub.x Si.sub.y C.sub.z wherein0.70.ltoreq.w.ltoreq.0.83,0.10.ltoreq.x.ltoreq.0.20,0.03.ltoreq.y.ltoreq.0.10,0.ltoreq.z.ltoreq.0.03, andw+x+y+z=1.00 wherein the metallic glass ribbon is essentially strain free and has easyxes of magnetization which are in the plane of the ribbon transverse (at 90.degree.) to the long axis of the ribbon;(2) bonding the metallic glass ribbon to material to be measured by means of a homogeneous viscous organic liquid having a viscosity greater than 10.sup.5 cp at 25.degree. C.;(3) allowing the viscous liquid to relax until the metallic glass ribbon is not stressed by the viscous liquid and is in a state of constant strain within it magnetostrictive dynamic range; and(4) measuring the susceptibility of the metallic glass ribbon which is directly proportional to strain within the material being measured.

    摘要翻译: 一种通过(1)选择组合物FewBxSiyCz的金属玻璃带来测量材料中的应变的方法,其中0.70≤0.83,0.10≤x≤0.20,0.03=y≤0.10 ,0≤z≤0.03,以及w + x + y + z = 1.00,其中金属玻璃带基本上是无应变的,并且具有容易的磁化轴线,其横截面(90°)处于带的平面中, 到丝带的长轴; (2)通过在25℃下粘度大于105cp的均匀粘稠有机液体将金属玻璃带与待测材料接合; (3)允许粘性液体松弛,直到金属玻璃带不被粘性液体施加,并且在其磁致伸缩动态范围内处于恒定应变状态; 和(4)测量金属玻璃带的敏感性,其与所测量的材料内的应变成正比。

    Magneto-strictive torque sensor
    4.
    发明授权
    Magneto-strictive torque sensor 失效
    电磁力矩传感器

    公开(公告)号:US4933580A

    公开(公告)日:1990-06-12

    申请号:US361947

    申请日:1989-06-05

    摘要: A magneto-strictive torque sensor for electrically contactlessly detecting a torque applied to a rotary shaft on the basis of a resulting change in the magnetic permeability of the surface of the shaft. Fine dents and retainer areas for retaining residual compressive stress due to the fine dents are formed on the surface of the rotary shaft. According to this arrangement, the process of magnetization resulting from the application of an exciting magnetic field and of the torque to the rotary shaft involves less magnetization due to magnetic domain wall displacement and consists principally of reversible magnetic rotation, with the result of reduced hysteresis in the magnetization process. The reduced hysteresis causes less hysteresis involved in torque detection and higher detection sensitivity, thus resulting in high accuracy of torque detection. Further, by working the surface of the rotary shaft for the purpose of forming the fine dents thereon, microdefects present on the surface layer of the rotary shaft are reduced or eliminated and thus reduced hysteresis and improved sensitivity can be attained in the process of torque detection.

    Apparatus for measuring torque applied to a shaft
    5.
    发明授权
    Apparatus for measuring torque applied to a shaft 失效
    用于测量施加在轴上的转矩的装置

    公开(公告)号:US4899598A

    公开(公告)日:1990-02-13

    申请号:US228093

    申请日:1988-08-04

    IPC分类号: G01L3/10

    摘要: An apparatus is provided for sensing torque applied to a shaft. In the field on contactless torque sensing, magnetic flux is induced into magnetostrictive material on a shaft whose torque is to be measured. The magnetic permeability of the magnetostrictive material changes in response to torque. The change in magnetic permeability alters the magnetic flux in the magnetostrictive material, and can be sensed by non-contacting inductive coils in close proximity to the magnetostrictive material. However, the amount of flux penetration into the shaft effects the sensed magnetic flux, and thus effects the accuracy of the torque measurement. As a solution, a magnetostrictive material sheet is bonded to a nonferromagnetic sheet which is bonded to a shaft. The nonferromagnetic sheet limits the amount of flux penetration into the shaft to produce better torque measurements.

    摘要翻译: 提供了用于感测施加到轴的扭矩的装置。 在非接触转矩传感领域,磁通量被感应到要测量转矩的轴上的磁致伸缩材料。 磁致伸缩材料的磁导率响应扭矩而变化。 磁导率的变化改变了磁致伸缩材料的磁通量,并且可以通过非常接近磁致伸缩材料的感应线圈来感测。 然而,穿透到轴中的通量的量会影响感测的磁通量,从而影响转矩测量的精度。 作为解决方案,将磁致伸缩材料片接合到结合到轴的非铁磁片。 非铁磁片材限制了通量进入轴的量,以产生更好的扭矩测量。

    Compensation for sensitivity drift in magnetoelastic force transducers
    6.
    发明授权
    Compensation for sensitivity drift in magnetoelastic force transducers 失效
    磁弹力传感器的灵敏度漂移补偿

    公开(公告)号:US4887471A

    公开(公告)日:1989-12-19

    申请号:US230995

    申请日:1988-08-11

    IPC分类号: G01D3/036 G01L1/12

    摘要: A magnetoelastic force transducer which is compensated for sensitivity drift is provided with a measuring transducer and a reference transducer (1) of the same material. In its simplest form the reference transducer may consist of a toroid. The two transducers are arranged in good thermal contact with one another. The reference transducer is arranged with a winding (2) for excitation with a current which at each moment is proportional to the supply current of the measuring transducer, and with a winding (3) for delivering a reference signal (U.sub.r) proportional to its magnetic flux. The output signal of the reference transducer is rectified in a phase-sensitive rectifier, the output signal of which is compared with a constant reference voltage. The deviation controls the phase position of the control voltage of the rectifier in such a way that the output signal of the rectifier is caused to correspond to the reference voltage. The output signal of the measuring transducer is rectrified in a phase-sensitive rectifier, which is controlled by said control voltage and the output signal of which constitutes the temperature-compensated measured signal.

    摘要翻译: 补偿灵敏度漂移的磁弹性力传感器具有相同材料的测量传感器和参考传感器(1)。 在其最简单的形式中,参考换能器可由环形线构成。 两个换能器彼此热接触地布置良好。 参考传感器布置有用于激励的绕组(2),其中电流在每个时刻与测量换能器的电源电流成比例,并且具有用于传递与其磁性成比例的参考信号(Ur)的绕组(3) 助焊剂 参考传感器的输出信号在相敏整流器中整流,其输出信号与恒定参考电压进行比较。 偏差控制整流器的控制电压的相位位置,使整流器的输出信号与参考电压相对应。 测量传感器的输出信号在相敏整流器中进行了整流,由相应的控制电压控制,其输出信号构成温度补偿测量信号。

    Device for the contactless indirect electrical measurement of the torque
at a shaft
    7.
    发明授权
    Device for the contactless indirect electrical measurement of the torque at a shaft 失效
    用于在轴处进行非接触式间接电力测量的装置

    公开(公告)号:US4805466A

    公开(公告)日:1989-02-21

    申请号:US108442

    申请日:1987-10-15

    IPC分类号: G01L3/10

    CPC分类号: G01L3/102 G01L3/105 Y10S73/02

    摘要: A device for the contactless indirect electrical measurement of the torque at a shaft utilizing the Matteucci effect in which the shaft is located in an induced magnetic direct-axis field. Upon torsion of the shaft, the change in magnetization in the shaft itself is not measured, but rather a measuring layer applied to the shaft is metrologically detected by the device. In order to avoid disturbing influences from the basic magnetization of the shaft on the measuring layer, a further layer is applied to the shaft, which short-circuits the magnetic flux resulting from the basic magnetization of the shaft, the measuring layer being magnetically decoupled from the inner layer by a highly nonmagnetic layer between the inner, further layer and the measuring layer.

    摘要翻译: 利用Matteucci效应对轴进行非接触间接电力测量的装置,其中轴位于感应磁直轴轴线场中。 在轴的扭转时,不测量轴本身的磁化变化,而是通过该装置计量地检测施加到轴的测量层。 为了避免测量层上的轴的基本磁化的干扰影响,另外的一层施加到轴上,这使得由轴的基本磁化引起的磁通量短路,测量层被磁性地从 内层由内层,另外层和测量层之间的高度非磁性层组成。

    Flextensional transducer
    9.
    发明授权
    Flextensional transducer 失效
    弯曲传感器

    公开(公告)号:US4742499A

    公开(公告)日:1988-05-03

    申请号:US873961

    申请日:1986-06-13

    申请人: John L. Butler

    发明人: John L. Butler

    摘要: An acoustic transducer for providing large displacements particularly at low acoustic frequencies is formed from a minimum of three curved shells which are attached to each other at their ends. The shells are driven by a ring or corresponding number of attached piezoelectric or magnetostrictive type rod or bar drivers which take the form of a regular polygon. The curved shells are attached to the ends of the driver and vibrate with magnified motion as the rods execute extensional motion. As the polygon expands the curved shells deform and produce additional motional in the same radial direction resulting in a large total displacement and corresponding large acoustic output.

    摘要翻译: 用于提供特别是低声频率的大位移的声换能器由最少三个弯曲的壳形成,它们在它们的端部彼此附接。 壳体由环形或相应数量的带有正多边形形式的压电或磁致伸缩型棒或棒驱动器驱动。 弯曲的壳体连接到驱动器的端部,并随着杆执行延伸运动而随着放大的运动而振动。 当多边形膨胀时,弯曲的壳体变形并在相同的径向方向产生额外的运动,导致大的总位移和相应的大的声输出。

    Magnetostrictive element for measuring knock in engines
    10.
    发明授权
    Magnetostrictive element for measuring knock in engines 失效
    用于测量发动机爆震的磁致伸缩元件

    公开(公告)号:US4736620A

    公开(公告)日:1988-04-12

    申请号:US882360

    申请日:1986-07-07

    申请人: Norbert Adolph

    发明人: Norbert Adolph

    IPC分类号: G01L23/22

    CPC分类号: G01L23/223 Y10S73/02

    摘要: A method and device for measuring combustion knocking in the combustion chamber of an externally-ignited internal combustion engine, the device comprising a magnetostrictive element with a maximum diameter of 2 mm and a length-to-diameter ratio of greater than 100, the device being mounted in the engine so as to be exposed to the combustion chamber. The device can include a coil to which the magnetostrictive element is connected for converting changes in magnetic conductability in the magnetostrictive element, due to pressure increases in the combustion chamber to which it is exposed, into electrical signals. The coil in turn can be connected to an electronic switching system for the engine.

    摘要翻译: 一种用于测量外部点燃的内燃机的燃烧室中的燃烧爆震的方法和装置,该装置包括最大直径为2mm,长度与直径之比大于100的磁致伸缩元件,该装置为 安装在发动机中以暴露于燃烧室。 该装置可以包括线圈,磁致伸缩元件连接到该线圈,用于转换由于其暴露于其中的燃烧室中的压力增加而导致的磁致伸缩元件的磁导率的变化。 线圈又可以连接到用于发动机的电子开关系统。