MAGNETORESISTIVE LINEAR DISPLACEMENT SENSOR, ANGULAR DISPLACEMENT SENSOR, AND VARIABLE RESISTOR
    8.
    发明申请
    MAGNETORESISTIVE LINEAR DISPLACEMENT SENSOR, ANGULAR DISPLACEMENT SENSOR, AND VARIABLE RESISTOR 审中-公开
    磁导率线性位移传感器,角位移传感器和可变电阻

    公开(公告)号:WO1995010020A1

    公开(公告)日:1995-04-13

    申请号:PCT/US1994010915

    申请日:1994-09-30

    CPC classification number: G01B7/30 G01B7/02 H01C10/00

    Abstract: A giant magnetoresistance displacement sensor includes at least one layered structure. This layered structure includes a harder magnetic (ferromagnetic or antiferromagnetic) layer (34) having a fixed magnetic state, a second, softer magnetic layer (32) and a metal layer (33) interposed between and contacting these two layers (32, 34) to prevent exchange coupling between the two layers. The sensor also includes means (56, 58) for inducing a domain wall (37) at a measurand position, between regions (35, 36) of nonaligned magnetic fields in the softer magnetic layer (32), and means (50) for measuring electrical resistance between points on opposite sides of the structure. In operation, the means (56, 58) for inducing a domain wall, typically one or more indexing magnets (56, 58), is positioned relative to the giant magnetoresistance strip. The resistance across the strip is measured, and from this resistance measurement the position of the domain wall is determined. The present invention is also a variable resistor, which is operated by positioning the means (56, 58) for inducing the domain wall at a selected position, to set the resistance across the strip to a desired value.

    Abstract translation: 巨磁阻位移传感器包括至少一层分层结构。 这种分层结构包括具有固定磁状态的较硬磁(铁磁或反铁磁)层(34),介于第二层(32,34)和接触这两层之间的金属层(33) 以防止两层之间的交换耦合。 传感器还包括用于在较软磁性层(32)中的不对准磁场的区域(35,36)之间的被测量位置处诱导畴壁(37)的装置(56,​​58),以及用于测量 在结构相对两侧的点之间的电阻。 在操作中,用于诱导畴壁(通常为一个或多个分度磁体(56,58))的装置(56,​​58)相对于巨磁电阻条定位。 测量条带上的电阻,并从该电阻测量中确定畴壁的位置。 本发明还是一种可变电阻器,其通过将用于在选定位置处诱导畴壁的装置(56,​​58)定位以将跨越条带的电阻设置为期望值来操作。

    OPTICAL SENSOR SYSTEM UTILIZING BRAGG GRATING SENSORS
    9.
    发明申请
    OPTICAL SENSOR SYSTEM UTILIZING BRAGG GRATING SENSORS 审中-公开
    光传感器系统利用BRAGG光栅传感器

    公开(公告)号:WO1998000740A1

    公开(公告)日:1998-01-08

    申请号:PCT/US1997006792

    申请日:1997-04-21

    CPC classification number: G01M11/086 G01D5/35383 G02B6/022

    Abstract: An optical system for detecting perturbations indicative of the performance of the piece of equipment being monitored is disclosed. The optical system comprises sensors (12), each of which uses Bragg gratings (12A-12N), induced therein and wherein the Bragg gratings (12A-12N) are arranged into a preselected distribution and each Bragg grating returns, when subjected to incident light, a narrowbeam signal (22, 24, 26) identified by a predetermined wavelength. The optical system utilizes at least one interferometer (56) whose operation is interlinked with optical multiplexing techniques, such as differentiate-cross-multiplying and time-division multiplexing.

    Abstract translation: 公开了一种用于检测指示所监视的设备的性能的扰动的光学系统。 光学系统包括传感器(12),每个传感器使用在其中感应的布拉格光栅(12A-12N),其中布拉格光栅(12A-12N)被布置成预选的分布,并且每个布拉格光栅在经受入射光时返回 ,由预定​​波长识别的窄波束信号(22,24,26)。 光学系统利用至少一个干涉仪(56),其干涉仪与光复用技术相互连接,如差分交叉乘法和时分复用。

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