公开(公告)号：WO2023081151A1

公开(公告)日：2023-05-11

申请号：PCT/US2022/048571

申请日：2022-11-01

Applicant: THE CURATORS OF THE UNIVERSITY OF MISSOURI

Inventor： HUANG, Jie ,  O'MALLEY, Ronald ,  ALLA, Dinesh Reddy ,  NEELAKANDAN, Deva Prasaad ,  ROMAN, Muhammad

IPC: G01B11/14 ,  G01J3/26 ,  G01B11/02 ,  G01D5/26 ,  G01D5/32

Abstract: A temperature insensitive fiber optic Fabry-Perot interferometer based mold gap measurement system that can be employed in foundry and continuous casting facilities for both non-ferrous and ferrous production applications. For steel continuous casting, the sensor is also capable of detecting crystallite formation in the mold flux layer within the mold gap by detecting reflections from both the flux layer and the steel shell to facilitate direct mold lubrication monitoring for continuous casting. These interferometers can also be easily multiplexed to perform interface shape measurements or monitor gap variations at various positions within a complex mold design. The ability to measure the cast shape exiting a continuous casting mold during operation will provide a new tool to monitor and improve product quality during operation and enhance the safety of the process through the detection of conditions that lead to slab cracking and breakouts.

公开(公告)号：WO2022032379A1

公开(公告)日：2022-02-17

申请号：PCT/CA2021/051099

申请日：2021-08-06

Applicant: HIFI ENGINEERING INC.

Inventor： JALILIAN, Seyed Ehsan ,  OWJIMEHR, Mehri ,  DANKERS, Arne ,  LIU, Yuhong

IPC: G01D21/00 ,  F16L55/48 ,  G01B17/00 ,  G01D5/32

Abstract: There is described a method of determining a position of a pipeline inspection gauge (PIG) in a fluid conduit. While the PIG is moving through the fluid conduit, one or more sensors positioned along the fluid conduit are used to detect one or more signals. Parameter data is extracted from the detected one or more signals. The parameter data includes one or more parameters of the detected one or more signals as a function of time and position along the fluid conduit. PIG movement data indicative of a position of the PIG in the fluid conduit as a function of time is generated using the parameter data.

公开(公告)号：WO2020113322A1

公开(公告)日：2020-06-11

申请号：PCT/CA2019/051731

申请日：2019-12-02

Applicant: HIFI ENGINEERING INC.

Inventor： DANKERS, Arne ,  JALILIAN, Seyed Ehsan

IPC: G01D5/26 ,  G01D5/32

Abstract: There are described methods, systems, and computer-readable media for detecting events in a conduit. Multiple lengths of optical fiber positioned alongside a conduit are used to detect a signal. For each length of optical fiber, interferometric data is obtained from the detected signal. The interferometric data obtained for one length of optical fiber is compared to the interferometric data obtained for one or more other lengths of optical fiber. Based on the comparison, it is determined whether the signal originated from the conduit.

公开(公告)号：WO2017141188A1

公开(公告)日：2017-08-24

申请号：PCT/IB2017/050882

申请日：2017-02-16

Applicant: NATIONAL RESEARCH COUNCIL OF CANADA

Inventor： GROBNIC, Dan ,  MIHAILOV, Stephen ,  WALKER, Robert ,  LU, Ping ,  DING, Huimin ,  COULAS, David ,  HNATOVSKY, Cyril

IPC: G01D5/32 ,  G02B6/124 ,  G02B6/136 ,  G02B6/34

CPC classification number: G01D5/35316 ,  G02B6/124 ,  G02B6/136 ,  G02B6/34

Abstract: Provided is an optical waveguide with an inscribed Bragg grating, where the Bragg grating is stable at high temperature, has low scattering loss and high reflectivity. Also provided is a method for inscribing a Bragg grating in an optical waveguide, the method comprising irradiating the optical waveguide with electromagnetic radiation from an ultrashort pulse duration laser of sufficient intensity to cause a permanent change in an index of refraction within a core of the optical waveguide, where the irradiating step is terminated prior to erasure of a Bragg resonance, and heating the optical waveguide to a temperature and for a duration sufficient to substantially remove a non-permanent grating formed in the optical waveguide by the irradiating step.

Abstract translation: 提供了一种具有内切布拉格光栅的光波导，其中布拉格光栅在高温下稳定，具有低散射损耗和高反射率。 还提供一种用于将布拉格光栅刻写在光波导中的方法，该方法包括用足够强度的超短脉冲持续时间激光的电磁辐射照射光波导，以引起光学纤芯内的折射率的永久变化 波导，其中辐射步骤在擦除布拉格共振之前终止，并且将光波导加热到一定温度并持续足够的时间以基本上通过照射步骤去除在光波导中形成的非永久性光栅。

公开(公告)号：WO2014118107A1

公开(公告)日：2014-08-07

申请号：PCT/EP2014/051470

申请日：2014-01-27

Applicant: SANOFI-AVENTIS DEUTSCHLAND GMBH

Inventor： DRAPER, Paul Richard ,  MORRIS, Anthony Paul ,  GILMORE, Stephen Francis

IPC: A61M5/145 ,  G01D5/32

CPC classification number: A61M5/20 ,  A61M5/1452 ,  A61M5/3146 ,  A61M5/31515 ,  A61M2005/206 ,  A61M2205/3306 ,  A61M2205/587 ,  G01D5/32 ,  G01D5/34 ,  G01S17/08

Abstract: The invention relates to an arrangement for detecting a position of a plunger (4) relative to a bung (3) in a drug cartridge (1), comprising a proximity sensor (5) located close to a distal end (6) of the plunger (4) facing the bung (3) and aligned to receive light reflected by the bung (3).

Abstract translation: 本发明涉及一种用于检测柱塞（4）相对于药物盒（1）中的塞子（3）的位置的装置，包括接近传感器（5），该接近传感器靠近柱塞的远端（6） （4）面对笨重杆（3）并对齐以接收由笨重杆（3）反射的光。

公开(公告)号：WO2010037229A1

公开(公告)日：2010-04-08

申请号：PCT/CA2009/001391

申请日：2009-10-01

Applicant: UNIVERSITY OF NEW BRUNSWICK ,  BROWN, Anthony ,  COLPITTS, Bruce

Inventor： BROWN, Anthony ,  COLPITTS, Bruce

IPC: G01B11/16 ,  G01D5/32 ,  G01K11/32 ,  G01L3/00

CPC classification number: G01B11/18 ,  G01D5/35303 ,  G01K11/32

Abstract: A cable for distributed fibre optic sensing comprising a flexible tape, an optical fibre suitable for Brillouin scattering measurement forming at least two lengths, and at least one free end of at least one length being connectable to a reading unit, wherein at least a section of the longitudinal length of the flexible tape is situated between at least a section of the two lengths such that the two lengths are in close proximity such that a temperature gradient between the two lengths is minimized, and wherein the section of the tape and the section of lengths can flex together.

Abstract translation: 一种用于分布式光纤传感的电缆，包括柔性带，适用于形成至少两个长度的布里渊散射测量的光纤，以及可连接到读取单元的至少一个长度的至少一个自由端，其中至少一部分 柔性带的纵向长度位于两个长度的至少一部分之间，使得两个长度非常接近，使得两个长度之间的温度梯度最小化，并且其中带的部分和 长度可以一起弯曲。

公开(公告)号：WO2005059474A1

公开(公告)日：2005-06-30

申请号：PCT/EP2004/014201

申请日：2004-12-14

Applicant: LEOPOLD KOSTAL GMBH & CO. KG ,  BOEHNE, Gregor

Inventor： BOEHNE, Gregor

IPC: G01D5/32

CPC classification number: G01D5/32 ,  G01D5/34792 ,  H03K17/969 ,  H03K2217/94116

Abstract: Beschrieben wird ein Lenkstockschaltersystem für ein Kraftfahrzeug, mit einer Einrichtung zur Positionserfassung des Lenkstockschaltersystems, welche die durch den Lenkstockschaltersystem eingenommene Schaltposition in ein Bitmuster umsetzt, mit einer Dekodierungseinrichtung, welche dem Bitmuster der erkannten Position eine Schaltfunktion zuordnet, und mit einer Einrichtung zur Erkennung von Fehlern bei der Erfassung oder der Übertragung der Bitmuster, wobei die Dekodierungseinrichtung bei erkannten Fehlern die Zuordnungen zwischen Bitmustern und auszulösenden Schaltfunktionen ändert.

Abstract translation: 本发明公开了一种用于机动车辆的转向柱开关系统，具有用于检测其转化通过在比特模式的转向柱开关系统换档位置所占的面积转向柱开关系统的位置的装置，具有解码设备，其指定所检测到的位置，切换函数的比特模式，并且具有用于检测错误的装置 在检测或传输的位模式，其中所述解码装置检测到错误时改变位模式和切换功能之间的分配来被触发。

公开(公告)号：WO2021227386A1

公开(公告)日：2021-11-18

申请号：PCT/CN2020/125635

申请日：2020-10-31

Applicant: 歌尔股份有限公司

Inventor： 焦裕玺

IPC: G01D5/32

Abstract: 一种状态检测方法，包括：获取光传感器采集的光信号(S110)；当根据光信号确定检测到反射光线时，控制马达开启(S120)；获取加速度传感器采集的马达的加速度信息(S130)；利用加速度信息和预设的校准震动特征信息进行匹配，确定可穿戴设备的穿戴状态(S140)。可见，该方法在光传感器确定检测到反射光线时开启马达，利用马达的震动和加速度传感器采集的加速度信息，与预设的校准震动特征信息进行对比，快速准确地确定用户的可穿戴设备的穿戴状态。

公开(公告)号：WO2021174336A1

公开(公告)日：2021-09-10

申请号：PCT/CA2021/050185

申请日：2021-02-19

Applicant: NATIONAL RESEARCH COUNCIL OF CANADA ,  FIBOS INC.

Inventor： GREEN, Richard ,  WU, Lixue ,  BAKAIC, Michael

IPC: G01D5/32 ,  G01P15/03 ,  G02B6/00 ,  G02B6/34 ,  G02B7/00

Abstract: An optical fiber transducer usable in environments of extreme operating temperature features a stationary support, a movable body displaceable back and forth relative thereto, and an optical fiber connected between the support and the movable body. The fiber has a Fiber Bragg Grating in an intermediate region thereof between the support and movable body. To accommodate varying coefficients of thermal expansion (CTEs) among these components, one or more tubes close circumferentially around the fiber. Each tube has a CTE that is greater than that of the fiber, and less than that of the constituent material of the support and movable body. The fiber is bonded to an interior of the tube(s), while an exterior of the tube(s) is bonded to the support and movable body.

公开(公告)号：WO2018209957A1

公开(公告)日：2018-11-22

申请号：PCT/CN2017/118234

申请日：2017-12-25

Applicant: 深圳市志奋领科技有限公司

Inventor： 张宁 ,  叶立平 ,  谢廷若

IPC: G01D5/34 ,  G01D5/32 ,  G01D5/26

CPC classification number: G01D5/344

Abstract: 一种传感器主体，包括发光元件、受光元件和驱动电路（8），所述发光元件包括光源（1）和第一准直透镜（2），受光元件包括第二准直透镜（4）、偏振分路器（5）、第一光电探测器（6）和第二光电探测器（7），第一光电探测器（6）和第二光电探测器（7）均与驱动电路电性连接。此外还公开一种回归反射型光电传感器，包括上述的传感器主体和回归反射器（3），回归反射器（3）包括角锥（32）和设置于角锥反射面上的二向色性偏振片，所述角锥（32）用于将传感器主体传输的入射光转换为出射光。本发明的回归反射型光电传感器工艺简单、成本低、出射光的偏振态均匀、消光比高，并且该回归反射器与传感器主体的配合提高了该光电传感器的探测距离。