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公开(公告)号：US07068186B2
公开(公告)日：2006-06-27
申请号：US10468064
申请日：2002-02-12
IPC分类号： G08G1/01
摘要： The present invention provides an optical fiber sensor for traffic monitoring, which comprises a former consisting of an elongated plate, and an optical fiber wound onto at least one surface of the elongated plate. The elongated plate is flexible in a direction transverse to the at least one predetermined property of an optical signal transmitted through the optical fiber sensor. The resulting sensor has a reduced depth which makes it easier to locate within the surface of a traffic route, has increased flexibility to enable to confirm to the surface of the traffic route, and has good cross axis sensitivity rejection.
摘要翻译： 本发明提供了一种用于交通监控的光纤传感器，其包括由细长板和缠绕在细长板的至少一个表面上的光纤组成的前端。 细长板在横向于通过光纤传感器传输的光信号的至少一个预定特性的方向上是柔性的。 所得到的传感器具有减小的深度，使得更容易在交通路线的表面内定位，具有增加的灵活性以使得能够确认交通路线的表面，并具有良好的横轴灵敏度抑制。
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公开(公告)号：US07282697B2
公开(公告)日：2007-10-16
申请号：US10502371
申请日：2003-01-15
CPC分类号： G01P15/093 , G01H9/004
摘要： A vibration sensing device, an acceleration sensing system and a method of manufacturing a vibration sensing device wherein the vibration sensing device comprises a flexible disk that is mounted symmetrically about a radial plane and has a mass located on the disk substantially symmetrical about this radial plane which exerts a force that is greater towards the edge than it is towards the centre of the disk. The vibration sensing device is sensitive to on-axis signals and insensitive to cross axis signals.
摘要翻译： 振动检测装置，加速度感测系统和制造振动感测装置的方法，其中所述振动感测装置包括围绕径向平面对称安装的柔性盘，并且具有位于所述盘上的质量基本上围绕该径向平面对称 对边缘施加比朝向磁盘中心更大的力。 振动检测装置对轴上信号敏感，对交叉轴信号不敏感。
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公开(公告)号：US07345953B2
公开(公告)日：2008-03-18
申请号：US10533761
申请日：2003-11-04
IPC分类号： G01V1/18
摘要： A vibration sensing device, package and system and a method of manufacturing a vibration sensing device are disclosed. The vibration sensing device comprises a body whose geometry is such that it exhibits flextensional properties.
摘要翻译： 公开了一种振动感测装置，封装和系统以及制造振动感测装置的方法。 振动检测装置包括其几何形状使其具有挠曲特性的主体。
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公开(公告)号：US09625348B2
公开(公告)日：2017-04-18
申请号：US13059810
申请日：2009-08-21
摘要： This invention relates to the fiber optic distributed acoustic sensing to detect P and S waves in a solid medium. Distributed acoustic sensing can be achieved using an unmodified fiber optic by launching optical pulses into the fiber and detecting radiation which is Rayleigh backscattered there from. By analyzing the returns in analysis bins, acoustic disturbances can be detected in a plurality of discrete longitudinal sections of the fiber. The present invention extends such fiber distributed acoustic sensing to detection of S and P waves.
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公开(公告)号：US09617848B2
公开(公告)日：2017-04-11
申请号：US13320884
申请日：2010-05-27
CPC分类号： E21B47/16 , E21B43/11857 , E21B43/26 , E21B47/101 , E21B47/123 , G01H9/004 , G01V1/50 , G01V2210/1429 , G01V2210/646
摘要： This application describes methods and apparatus for downhole monitoring in real-time. The method involves interrogating an unmodified optic fiber (102) arranged along the path of a well bore (106) to provide a distributed acoustic sensor and sampling data gathered from a plurality of sensing portions of the fiber. The sampled data is then processed to provide a real-time indication of the acoustic signals detected by the sensing portions of the fiber. The real-time indication provides information to an operator or controller of the downwell process with real-time feedback data regarding what is happening during the downwell process which allows the identification of any problems and adjustment of the process parameters.
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公开(公告)号：US20130319121A1
公开(公告)日：2013-12-05
申请号：US13984426
申请日：2012-02-27
IPC分类号： G01H9/00
CPC分类号： G01H9/004
摘要： This application describes methods and apparatus for distributed acoustic sensing providing enhanced sensitivity for certain acoustic signals. The method uses a fibre optic distributed acoustic sensing (DAS) apparatus (106) to detect acoustic signals wherein the fibre optic distributed acoustic sensor comprises at least one optical fibre (104) deployed in an area of interest (204) such that at least one section of said optical fibre is deployed to monitor the acoustic response of a cavity (206) to incident acoustic signals. The cavity is dimensioned such that the cavity resonates at a desired frequency and thus the relevant sensing portions of the DAS sensor show an enhanced response to acoustic signals which excite resonance in the cavity. The optical fibre (104) may be deployed to run through said cavity.
摘要翻译： 本申请描述了用于分布式声学感测的方法和装置，其为某些声学信号提供增强的灵敏度。 该方法使用光纤分布式声学感测（DAS）设备（106）来检测声信号，其中光纤分布式声学传感器包括部署在感兴趣区域（204）中的至少一个光纤（104），使得至少一个 展开所述光纤的部分以监测腔（206）对入射声信号的声响应。 空腔的尺寸使得空腔以期望的频率谐振，因此DAS传感器的相关感测部分对在空腔中激发谐振的声信号显示增强的响应。 光纤（104）可以被布置成穿过所述空腔。
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公开(公告)号：US20130233537A1
公开(公告)日：2013-09-12
申请号：US13988839
申请日：2011-11-30
IPC分类号： E21B43/26
CPC分类号： E21B47/101 , E21B43/26 , E21B43/267 , E21B47/123 , E21B49/00
摘要： This application relates to methods and apparatus for monitoring hydraulic fracturing in well formation and fracture characterisation using distributed acoustic sensing (DAS). The method involves interrogating a optic fibre (102) arranged down the path of a bore hole (106) to provide a distributed acoustic sensor and also monitoring flow properties of fracturing fluid pumped (114) into the well. The acoustic data from the distributed acoustic sensor is processed together with the flow properties data to provide an indication of at least one fracture characteristic.
摘要翻译： 本申请涉及使用分布式声学传感（DAS）监测井形成和裂缝特征的水力压裂的方法和装置。 该方法包括询问沿钻孔（106）的路径布置的光纤（102），以提供分布式声学传感器，并且还监测泵送到井中的压裂流体（114）的流动性质。 来自分布式声学传感器的声学数据与流量特性数据一起被处理以提供至少一个断裂特征的指示。
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公开(公告)号：US20130218534A1
公开(公告)日：2013-08-22
申请号：US13397699
申请日：2012-02-16
申请人： David John Hill
发明人： David John Hill
IPC分类号： G06F17/10
CPC分类号： G05B23/0294 , B29C65/02 , B29C65/4835 , B29C66/1122 , B29C66/45 , B29C66/8322 , B29C66/845 , B29C66/9121 , B29C66/91212 , B29C66/91221 , B29C66/919 , B29C66/91951 , B29C66/9674 , C09J4/00 , G01N25/486
摘要： A device for monitoring the extent of cure of an adhesive located between at least two components. The device includes a data logger operably connected to at least one of the components, and configured to record data related to time and temperature, obtaining a thermal history data of the component during a heating process. An algorithm, installed in the data logger, processes the thermal history data of the component. A kinetic cure model is included in the algorithm calculating and predicting an extent of adhesive cure according to the processed thermal history. The device further includes a visual display operably connected to the data logger and configured to indicate the extent of adhesive cure.
摘要翻译： 用于监测位于至少两个组分之间的粘合剂的固化程度的装置。 该装置包括可操作地连接到至少一个部件的数据记录器，并被配置为记录与时间和温度有关的数据，在加热过程中获得部件的热历史数据。 安装在数据记录器中的算法处理组件的热历史数据。 根据加工热历史计算和预测粘合剂固化程度的算法中包括动力学固化模型。 该设备还包括可操作地连接到数据记录器并被配置为指示粘合剂固化的程度的视觉显示器。
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公开(公告)号：US20120230628A1
公开(公告)日：2012-09-13
申请号：US13509402
申请日：2010-11-12
IPC分类号： G02B6/00
CPC分类号： G01D5/353 , G01D5/35361 , G02B6/00
摘要： The invention relates to a distributed fibre optic sensor (104, 106) having a first spatial resolution (301, 303) and a second, different, spatial resolution (302, 304). The sensor, which may be a distributed acoustic sensor, has an optical source (112) configured to interrogate an optical fibre (104) with optical radiation and a detector (116) configured to detected optical radiation back-scattered from within the fibre. A processor (108) is configured to process the detected back-scatter radiation to provide a plurality of longitudinal sensing portions of fibre. The optical source and processor are adapted to provide the first and second spatial resolutions, for instance by changing the duration and/or separation of the optical pulses and analysis bins. The first and second spatial resolutions may be provided sequentially or simultaneously and the spatial resolution used may be varied as part of a default pattern or in response to a detection event.
摘要翻译： 本发明涉及具有第一空间分辨率（301,303）和第二不同的空间分辨率（302,304）的分布式光纤传感器（104,106）。 可以是分布式声学传感器的传感器具有被配置为用光辐射来询问光纤（104）的光源（112）和被配置为检测从光纤内部反向散射的光辐射的检测器（116）。 处理器（108）被配置为处理检测到的反向散射辐射以提供光纤的多个纵向感测部分。 光源和处理器适于提供第一和第二空间分辨率，例如通过改变光脉冲和分析箱的持续时间和/或分离。 可以顺序地或同时地提供第一和第二空间分辨率，并且使用的空间分辨率可以作为默认模式的一部分或响应于检测事件而变化。
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公开(公告)号：US20100098114A1
公开(公告)日：2010-04-22
申请号：US12593531
申请日：2008-03-28
申请人： Jolyon DeFreitas , David John Hill
发明人： Jolyon DeFreitas , David John Hill
CPC分类号： H01S3/1305 , H01S3/067 , H01S3/06704 , H01S3/137 , H01S3/1398 , H01S5/0687 , Y10T29/49826
摘要： A feedback control circuit and method for controlling laser frequency employing an interferometric phase sensor which accepts a light output from a laser and combines a phase modulated version of the light output, with an unmodulated version. By modulating only one component of the signal in the interferometric sensor, the improved noise characteristics are obtained, while demodulation can be performed relatively easily and cheaply. Methods and enclosures for reducing ambient noise in an interferometer or the delay coil thereof are also described.
摘要翻译： 一种用于控制激光频率的反馈控制电路和方法，该干涉测量相位传感器接受来自激光器的光输出并将光输出的相位调制版本与未调制版本组合。 通过仅调制干涉式传感器中的信号的一个分量，可以获得改善的噪声特性，同时可以相对容易且便宜地执行解调。 还描述了用于降低干涉仪或其延迟线圈中的环境噪声的方法和外壳。
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