FIBER OPTIC SENSOR EGRESS/INGRESS RUGGEDIZATION FOR FLEXIBLE WOVEN STRUCTURES

    公开(公告)号:US20240328877A1

    公开(公告)日:2024-10-03

    申请号:US18128365

    申请日:2023-03-30

    摘要: An apparatus comprises a flexible woven structure including an egress and/or ingress location at an external surface of the flexible woven structure. A fiber optic sensor is embedded in the flexible woven structure to allow the fiber optic sensor to detect one or more of strain, temperature, vibration, acoustics, 3-dimensional shape and/or pressure on the flexible woven structure. The fiber optic sensor extends out of the flexible woven structure at the egress and/or ingress location for connection to a connector or a termination. First thread stitches fasten the fiber optic sensor and any protective coatings, tubing, or conduit to the external surface of the flexible woven structure near the egress and/or ingress location. An optional reinforcement patch may cover the egress and/or ingress location and a portion of fiber optic sensor that extends out of the flexible woven structure at the egress and/or ingress location. Second thread stitches fasten the reinforcement patch to the external surface of the flexible woven structure to protect the fiber optic sensor and reduce bending and stress at the egress/ingress location.

    Distributed measurement of minimum and maximum in-situ stress in substrates

    公开(公告)号:US11022717B2

    公开(公告)日:2021-06-01

    申请号:US16114376

    申请日:2018-08-28

    摘要: A system for performing distributed measurements of in-situ stress includes an expandable element with at least one fiber optic sensor. The expandable element can be positioned at various depths in a hole in a substrate. A pressurizing device expands (and contracts) the expandable element when the expandable element is inserted in the hole in the substrate to exert pressure on the hole wall. A pressure sensor provides a sensor output indicative of a pressure applied to the hole wall by the expandable element. The fiber optic sensor and an optical interrogator measure strain along a length of the sensor in a continuous, high spatial resolution manner Based on the measured strain and pressure sensor output, the system determines various properties of the substrate such as, minimum principal stress, maximum principal stress, and/or principal stress direction associated with one or more fractures in the substrate, as well as substrate modulus.

    Method and apparatus for OFDR-based electrophoresis
    5.
    发明授权
    Method and apparatus for OFDR-based electrophoresis 有权
    用于OFDR电泳的方法和装置

    公开(公告)号:US09244011B2

    公开(公告)日:2016-01-26

    申请号:US14358951

    申请日:2012-11-05

    发明人: Mark E. Froggatt

    摘要: An optical interrogation system, e.g., an OFDR-based system, measures local changes of index of refraction of a medium contained within a light guiding tube and includes an optical interferometric interrogator, optical detection circuitry, and a data processor. The data processor initiates a sweep of the light source and guide light from an interrogating light source into a medium contained by a tube which restricts movement of particles provided into the tube, where the medium is subjected to a driving force that overcomes resistance to movement of particles through the medium in the tube. The optical interferometric interrogator provides an optical interference pattern associated with a group of particles having moved in the tube as a result of the driving force. Based on the optical interference pattern, the data processor identifies a current location of the group of particles in the tube.

    摘要翻译: 光学询问系统,例如基于OFDR的系统,测量包含在导光管内的介质的折射率的局部变化,并且包括光学干涉询问器,光学检测电路和数据处理器。 数据处理器启动光源的扫描并将光从询问光源引导到由管包含的介质中,该介质限制了设置在管中的颗粒的移动,其中介质受到驱动力,该驱动力克服 颗粒通过管中的介质。 光学干涉询问器提供与由于驱动力而在管中移动的一组颗粒相关联的光学干涉图案。 基于光学干涉图案,数据处理器识别管中的一组颗粒的当前位置。

    Digital pulsed phase locked loop
    9.
    发明授权
    Digital pulsed phase locked loop 失效
    数字脉冲锁相环

    公开(公告)号:US07513160B2

    公开(公告)日:2009-04-07

    申请号:US11806475

    申请日:2007-05-31

    IPC分类号: G01N29/04

    CPC分类号: G01S15/003

    摘要: A digital pulsed phase locked loop (DPPLL) provides exact measurements of echo phase, time, and/or position delay as well as echo amplitude. These exact measurements provide better and more reliable results that directly benefit the many real world applications for the DPPLL. The DPPLL permits simultaneous tracking of multiple echo pulses and considerably improved echo selection and sampling.

    摘要翻译: 数字脉冲锁相环(DPPLL)提供回波相位,时间和/或位置延迟以及回波幅度的精确测量。 这些精确的测量提供更好和更可靠的结果,直接有益于DPPLL的许多现实世界的应用。 DPPLL允许同时跟踪多个回波脉冲,并显着改善回波选择和采样。

    METHOD AND APPARATUS FOR CLASSIFYING GASEOUS AND NON-GASEOUS OBJECTS
    10.
    发明申请
    METHOD AND APPARATUS FOR CLASSIFYING GASEOUS AND NON-GASEOUS OBJECTS 审中-公开
    用于分类气体和非气体物体的方法和装置

    公开(公告)号:US20080242997A1

    公开(公告)日:2008-10-02

    申请号:US12053289

    申请日:2008-03-21

    IPC分类号: A61B8/06

    摘要: Ultrasonic pulse echo object classification is described. A broadband ultrasound transducer transmits a broadband ultrasound pulse towards the object and detecting an associated ultra sound echo of that pulse from the object. An ultrasound receiver receives the detected echo signal. A signal processor, coupled to the ultrasound receivers determines and analyzes a time duration parameter and a frequency parameter (and possibly one or more other parameters like amplitude and/or phase) of the detected echo signal and classifies the object as a solid or liquid or as gaseous based on the parameters of the detected echo signal.

    摘要翻译: 描述超声脉冲回波对象分类。 宽带超声换能器向对象发送宽带超声脉冲,并从对象检测该脉冲的相关超声回波。 超声波接收器接收检测到的回波信号。 耦合到超声接收机的信号处理器确定并分析检测到的回波信号的持续时间参数和频率参数(以及可能的一个或多个其他参数,例如幅度和/或相位),并将该对象分类为固体或液体或 基于检测到的回波信号的参数作为气体。