FASEROPTISCHE ERFASSUNGSEINRICHTUNG SOWIE VERFAHREN ZUM BETREIBEN EINER SOLCHEN FASEROPTISCHEN ERFASSUNGSEINRICHTUNG

    公开(公告)号:WO2018141502A1

    公开(公告)日:2018-08-09

    申请号:PCT/EP2018/050309

    申请日:2018-01-08

    IPC分类号: G01D5/353 G01D5/38

    摘要: Die Erfindung betrifft eine faseroptische Erfassungseinrichtung (10), mit wenigstens einer als Lichtleiter ausgebildeten Faser (12), welche wenigstens einen ersten Längenbereich (14) mit einem ersten Außenumfang und wenigstens einen sich in Längserstreckungsrichtung (22) der Faser (12) an den ersten Längenbereich (14) anschließenden zweiten Längenbereich (16) mit einem gegenüber dem ersten Außenumfang geringeren zweiten Außenumfang aufweist, mit wenigstens einer Schutzhülle (24), in welcher zumindest die Längenbereiche (14, 16) aufgenommen sind, und mit wenigstens einem Sensortandem (28), welches wenigstens ein in den ersten Längenbereich (14) eingeschriebenes erstes Faser-Bragg-Gitter (30) und wenigstens ein in den zweiten Längenbereich (16) eingeschriebenes zweites Faser-Bragg-Gitter (34) aufweist und dazu ausgebildet ist, an einer korrespondierenden Messstelle sowohl eine an der Messstelle herrschende Temperatur als auch wenigstens eine an der Messstelle auftretende und in Längserstreckungsrichtung (22) der Faser (12) wirkende Kraft zu erfassen.

    METHOD AND APPARATUS FOR OPTICAL SENSING
    2.
    发明申请
    METHOD AND APPARATUS FOR OPTICAL SENSING 审中-公开
    光学感测方法与装置

    公开(公告)号:WO2016142695A1

    公开(公告)日:2016-09-15

    申请号:PCT/GB2016/050625

    申请日:2016-03-07

    申请人: SILIXA LTD.

    IPC分类号: G01D5/353 G01H9/00

    摘要: Embodiments of the invention provide an improved optical fiber distributed acoustic sensor system that makes use of a specially designed optical fiber to improve overall sensitivity of the system, in some embodiments by a factor in excess of 10. This is achieved by inserting into the fiber weak broadband reflectors periodically along the fiber. The reflectors reflect only a small proportion of the light from the DAS incident thereon back along the fiber, typically in the region of 0.001% to 0.1%, but preferably around 0.01% reflectivity per reflector. In addition, to allow for temperate compensation to ensure that the same reflectivity is obtained if the temperature changes, the reflection bandwidth is relatively broadband i.e. in the region of +/- 3nm from the nominal laser wavelength. In some embodiments the reflectors are formed from a series of fiber Bragg gratings, each with a different center reflecting frequency, the reflecting frequencies and bandwidths of the gratings being selected to provide the broadband reflection. In other embodiments a chirped grating may also be used to provide the same effect. In preferred embodiments, the reflectors are spaced at half the gauge length i.e. the desired spatial resolution of the optical fiber DAS.

    摘要翻译: 本发明的实施例提供了一种改进的光纤分布式声学传感器系统,其利用专门设计的光纤来改善系统的总体灵敏度,在一些实施例中是超过10倍。这是通过将光纤插入到弱纤维 宽带反射器周期性地沿着光纤。 反射镜仅反射沿着光纤在其上反射的DAS的光的一小部分,通常在每个反射器的0.001%至0.1%的范围内,优选地为约0.01%的反射率。 此外,为了允许温和补偿以确保如果温度改变,获得相同的反射率,则反射带宽相对较宽,即距离标称激光波长+/- 3nm的区域。 在一些实施例中,反射器由一系列光纤布拉格光栅形成,每个具有不同的中心反射频率,选择光栅的反射频率和带宽以提供宽带反射。 在其他实施例中,也可以使用啁啾光栅来提供相同的效果。 在优选实施例中,反射器间隔开量程长度的一半,即光纤DAS的期望空间分辨率。

    DEFORMATION MEASUREMENT METHOD AND APPARATUS
    3.
    发明申请
    DEFORMATION MEASUREMENT METHOD AND APPARATUS 审中-公开
    变形测量方法和装置

    公开(公告)号:WO2016000034A1

    公开(公告)日:2016-01-07

    申请号:PCT/AU2015/050361

    申请日:2015-06-29

    IPC分类号: G01B11/16 G01D5/353 G02B6/00

    摘要: Apparatus for measuring deformation of an elongate body defining an axis, the apparatus including: an optical fibre arranged relative to the body, the optical fibre including a first strain sensitive optical fibre portion coupled to the body and at least partially aligned at a first angle relative to the axis, and a second strain sensitive optical fibre portion coupled to the body and at least partially aligned at a second angle relative to the axis, the second angle being opposite to the first angle; a radiation source connected to an end of the optical fibre, the radiation source being for supplying electromagnetic radiation to the optical fibre; a sensor connected to an end of the optical fibre, the sensor being for sensing electromagnetic radiation received from the first and second optical fibre portions; and a processing device for determining the deformation of the body using the sensed electromagnetic radiation, the deformation including any axial or torsional deformation.

    摘要翻译: 用于测量限定轴线的细长主体的变形的装置,所述装置包括:相对于所述主体布置的光纤,所述光纤包括耦合到所述主体并且以第一角度相对的至少部分对准的第一应变敏感光纤部分 以及耦合到所述主体并且相对于所述轴线以第二角度至少部分对准的第二应变敏感光纤部分,所述第二角度与所述第一角度相反; 连接到所述光纤端部的辐射源,所述辐射源用于向所述光纤提供电磁辐射; 连接到所述光纤端部的传感器,所述传感器用于感测从所述第一和第二光纤部分接收的电磁辐射; 以及处理装置,用于使用感测的电磁辐射来确定身体的变形,所述变形包括任何轴向或扭转变形。

    FASEROPTISCHER SENSOR UND DESSEN VERWENDUNG
    4.
    发明申请
    FASEROPTISCHER SENSOR UND DESSEN VERWENDUNG 审中-公开
    光纤传感器及其用途

    公开(公告)号:WO2014154528A1

    公开(公告)日:2014-10-02

    申请号:PCT/EP2014/055389

    申请日:2014-03-18

    IPC分类号: G01B11/16 G01D5/353 G02B6/02

    摘要: Die Erfindung betrifft einen faseroptischen Sensor (1) mit einem Lichtwellenleiter (12), welcher zumindest einen ersten Kern (11) und einen den ersten Kern (11) umgebenden Mantel (10) aufweist, wobei der erste Kern (11) sich im Wesentlichen über die gesamte Länge des Lichtwellenleiters (12) erstreckt, wobei der Sensor (1) zumindest einen zweiten Kern (2) aufweist, welcher zumindest teilweise vom Mantel (10) umgeben ist, wobei die Längserstreckung des zweiten Kerns (2) geringer ist als die gesamte Länge des Lichtwellenleiters (12) und in den zweiten Kern (2) zumindest ein Bragg-Gitter (231a, 231b, 232) eingebracht ist. Weiterhin betrifft die Erfindung eine Verwendung des faseroptischen Sensors (1).

    摘要翻译: 本发明涉及一种具有光波导(12),一个光纤传感器(1),围绕该至少一个第一芯(11)和一个第一芯(11)套(10),其中,所述第一芯(11)基本上在延伸 光波导(12),其中所述传感器(1)包括的整个长度的至少一个第二芯(2),其由所述外壳(10),其中,所述第二芯(2)的纵向延伸是小于总包围至少部分地 (231A,231B,232)被引入光波导(12)和在所述第二芯(2)的至少一个布拉格光栅的长度。 此外,本发明涉及一种使用光纤传感器(1)的。

    METHOD AND DEVICES FOR DETECTING FLEXURE, AND STRUCTURE SUCH AS A GEOTECHNICAL OR BUILDING STRUCTURE EQUIPPED WITH SUCH A DEVICE
    6.
    发明申请
    METHOD AND DEVICES FOR DETECTING FLEXURE, AND STRUCTURE SUCH AS A GEOTECHNICAL OR BUILDING STRUCTURE EQUIPPED WITH SUCH A DEVICE 审中-公开
    用于检测弯曲的方法和装置,以及如此设备配备的地球物理或建筑结构的结构

    公开(公告)号:WO1997042463A1

    公开(公告)日:1997-11-13

    申请号:PCT/FR1997000778

    申请日:1997-04-30

    IPC分类号: G01B11/16

    摘要: To detect by means of a long-baseline system the global bending strain of a structure (1), i.e. by detecting the accumulated local bending strains over a distance of at least two metres, detection lines (8, 11), preferably optical fibre lines, which indicate the extent of their elongation by an increased attenuation of the light pulses which run through them, are used. To detect the direction and the extent of the flexure of the structure (1), the latter is closely associated with a model comprising a matrix (13) which follows the flexural bending strains of the structure (1), and at least one, preferably two detection lines (8, 11) suitably located in the matrix cross-section so that their elongation variations and/or the differences between their respective elongation variations are indicative of the flexure of the model, which gives indications on the flexure of the structure (1). The invention is useful in determining the straight or distorted flexure or contraflexure of structures not easily accessible or partially inaccessible, to measure level variations on one or several axes.

    摘要翻译: 为了通过长基线系统检测结构(1)的全局弯曲应变,即通过在至少两米的距离上检测累积的局部弯曲应变,检测线(8,11),优选光纤线 ,其表示通过它们穿过的光脉冲的衰减增加而伸长的程度。 为了检测结构(1)的弯曲的方向和程度,后者与包括跟随结构(1)的弯曲弯曲应变的矩阵(13)的模型紧密相关,并且至少一个,优选地 两个检测线(8,11)适当地位于矩阵横截面中,使得它们的伸长变化和/或它们各自的伸长变化之间的差异指示模型的挠曲,其给出了结构的挠曲的指示( 1)。 本发明可用于确定不容易接近或部分不可接近的结构的直的或变形的挠曲或反制,以测量一个或多个轴上的水平变化。

    A CONDITION MONITORING SENSOR AND SYSTEM
    7.
    发明申请
    A CONDITION MONITORING SENSOR AND SYSTEM 审中-公开
    状态监测传感器和系统

    公开(公告)号:WO2017136869A1

    公开(公告)日:2017-08-17

    申请号:PCT/AU2017/000038

    申请日:2017-02-09

    发明人: JAMES, Gary

    摘要: The present invention is a condition monitoring sensor system for a conveyor belt flight, having a plurality of sensors that are formed from a continuous length of fibre optic cable that runs along at least a portion of the length of the conveyor belt flight. A looped portion of the fibre optic cable is first formed with a comparatively tight bend radius so that the looped portion is adapted to be threaded through the interior diameter of the hollow shaft of at least some of the rollers in the conveyor belt system, for a sufficient distance so that an end portion of the looped portion extends beyond the end of the hollow shaft, and then the end portion of the looped portion is expanded out so that the bend radius is significantly increased, which opens out the end portion of the looped portion, and gives the end portion an increased bend radius which thereby enables a condition monitoring signal to pass through the loop portion without significant signal degradation.

    摘要翻译: 本发明是一种用于传送带飞行的状态监测传感器系统,具有多个传感器,所述多个传感器由连续长度的光纤缆线形成,所述传感器沿至少一部分长度的 传送带飞行。 纤维光缆的环状部分首先以相对较小的弯曲半径形成,使得环状部分适于穿过传送带系统中的至少一些滚轮的空心轴的内径,以用​​于 足够的距离,使得环状部分的端部延伸超过中空轴的端部,然后环状部分的端部扩展出来,使得弯曲半径显着增加,这展开环状物的端部 部分,并给出端部增加的弯曲半径,从而使状态监测信号能够通过环路部分而没有显着的信号退化。

    DEFORMATION MEASUREMENT METHOD AND APPARATUS
    8.
    发明申请
    DEFORMATION MEASUREMENT METHOD AND APPARATUS 审中-公开
    变形测量方法和装置

    公开(公告)号:WO2016000034A9

    公开(公告)日:2017-02-09

    申请号:PCT/AU2015050361

    申请日:2015-06-29

    IPC分类号: G01B11/16 G01D5/353 G02B6/00

    摘要: Apparatus for measuring deformation of an elongate body defining an axis, the apparatus including: an optical fibre arranged relative to the body, the optical fibre including a first strain sensitive optical fibre portion coupled to the body and at least partially aligned at a first angle relative to the axis, and a second strain sensitive optical fibre portion coupled to the body and at least partially aligned at a second angle relative to the axis, the second angle being opposite to the first angle; a radiation source connected to an end of the optical fibre, the radiation source being for supplying electromagnetic radiation to the optical fibre; a sensor connected to an end of the optical fibre, the sensor being for sensing electromagnetic radiation received from the first and second optical fibre portions; and a processing device for determining the deformation of the body using the sensed electromagnetic radiation, the deformation including any axial or torsional deformation.

    摘要翻译: 用于测量限定轴线的细长主体的变形的装置,所述装置包括:相对于所述主体布置的光纤,所述光纤包括耦合到所述主体并且以第一角度相对的至少部分对准的第一应变敏感光纤部分 以及第二应变敏感光纤部分,其耦合到所述主体并且相对于所述轴线以第二角度至少部分对准,所述第二角度与所述第一角度相反; 辐射源,其连接到所述光纤的端部,所述辐射源用于向所述光纤提供电磁辐射; 连接到所述光纤端部的传感器,所述传感器用于感测从所述第一和第二光纤部分接收的电磁辐射; 以及用于使用感测到的电磁辐射来确定身体变形的处理装置,所述变形包括任何轴向或扭转变形。

    FIBER OPTIC SENSOR SHAPED FOR A PARTICULAR FREQUENCY RESPONSE AND METHOD OF MANUFACTURING SAME
    9.
    发明申请
    FIBER OPTIC SENSOR SHAPED FOR A PARTICULAR FREQUENCY RESPONSE AND METHOD OF MANUFACTURING SAME 审中-公开
    针对特定频率响应形成的光纤传感器及其制造方法

    公开(公告)号:WO2016205955A1

    公开(公告)日:2016-12-29

    申请号:PCT/CA2016/050750

    申请日:2016-06-27

    IPC分类号: G01H9/00 G01B9/02

    摘要: Sensor shaped to have a frequency response that has less spectral fading than a sensor with a rectangular wrapping pattern, and methods for making such sensors, are disclosed. One such method includes selecting a wrapping pattern comprising multiple layers in which a top layer has a different length than a bottom layer and where the bottom layer is adjacent a mandrel. The method further includes wrapping optical fiber around the mandrel according to the wrapping pattern.

    摘要翻译: 传感器成形为具有比具有矩形缠绕图案的传感器具有更少光谱衰减的频率响应,以及用于制造这种传感器的方法。 一种这样的方法包括选择包括多层的包装图案,其中顶层具有与底层不同的长度,并且其中底层邻近心轴。 该方法还包括根据包装图案将光纤缠绕在心轴周围。