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    • 1. 发明申请
    • SYSTEM AND METHOD FOR UNIFORM AND LOCALIZED WALL THICKNESS MEASUREMENT USING FIBER OPTIC SENSORS
    • 使用光纤传感器进行均匀化和局部化厚度测量的系统和方法
    • US20120099097A1
    • 2012-04-26
    • US13256633
    • 2010-03-18
    • Peter CoupeDamon Richard RobertsDmitry BelovEvgeniya Myalo DegerMasafumi FukuharaYamid PicoRogerio Tadeu RamosIan Peirce
    • Peter CoupeDamon Richard RobertsDmitry BelovEvgeniya Myalo DegerMasafumi FukuharaYamid PicoRogerio Tadeu RamosIan Peirce
    • G01B11/16
    • G01B11/06G01B11/18G01B21/045G01D3/0365G01D5/35383G01L9/0032
    • A system and method are provided for determining wall thickness of a structure such as a metallic pressurized pipe. The system includes an optical fiber having a plurality of Fiber Bragg Gratings (FBGs), and a mounting for securing the FBGs over discrete portions of the exterior surface of the pipe such that strain in the pressurized pipe wall is transmitted to the FBGs. The system further includes a light source and a light sensor coupled to an end of the optical fiber. The light sensor converts light reflected back from the FBGs into electrical signals that a digital processor converts into strain measurements. The FBGs are mounted around portions of the pipe expected to have significant metal loss as well as portions of the pipe expected to have negligible metal loss. The method includes at least one of comparing relative strains at locations with negligible metal loss to those with significant metal loss to accurately determine the thickness of the wall with metal loss; compensating for temperature effects by considering relative strains at areas of the pipe with and without metal loss; and measuring axial strain on the pipe with one or more of the FBGs to correct for at least one of bending and torsion effects on hoop strain.
    • 提供了一种用于确定诸如金属加压管的结构的壁厚的系统和方法。 该系统包括具有多个光纤布拉格光栅(FBG)的光纤,以及用于将FBG固定在管的外表面的离散部分上的安装件,使得加压管壁中的应变传递到FBG。 该系统还包括耦合到光纤端部的光源和光传感器。 光传感器将从FBG反射回来的光转换为数字处理器转换为应变测量的电信号。 FBG安装在预期具有显着金属损失的管道周围,并且管道的部分预期具有可忽略的金属损失。 该方法包括将具有可忽略的金属损失的位置处的相对应变与具有显着金属损失的位置进行比较中的至少一个,以精确地确定具有金属损失的壁的厚度; 通过考虑在具有和不具有金属损失的管道的区域处的相对应变来补偿温度影响; 并用一个或多个FBG测量管道上的轴向应变,以校正环箍应变的弯曲和扭转效应中的至少一种。
    • 3. 发明授权
    • System and method for uniform and localized wall thickness measurement using fiber optic sensors
    • 使用光纤传感器进行均匀和局部壁厚测量的系统和方法
    • US08941821B2
    • 2015-01-27
    • US13256633
    • 2010-03-18
    • Peter CoupeDamon Richard RobertsDmitry BelovEvgeniya Myalo DegerMasafumi FukuharaYamid PicoRogerio Tadeu RamosIan Peirce
    • Peter CoupeDamon Richard RobertsDmitry BelovEvgeniya Myalo DegerMasafumi FukuharaYamid PicoRogerio Tadeu RamosIan Peirce
    • G01B11/16G01B11/06G01B21/04G01D3/036G01D5/353G01L9/00
    • G01B11/06G01B11/18G01B21/045G01D3/0365G01D5/35383G01L9/0032
    • A system and method are provided for determining wall thickness of a structure such as a metallic pressurized pipe. The system includes an optical fiber having a plurality of Fiber Bragg Gratings (FBGs), and a mounting for securing the FBGs over discrete portions of the exterior surface of the pipe such that strain in the pressurized pipe wall is transmitted to the FBGs. The system further includes a light source and a light sensor coupled to an end of the optical fiber. The light sensor converts light reflected back from the FBGs into electrical signals that a digital processor converts into strain measurements. The FBGs are mounted around portions of the pipe expected to have significant metal loss as well as portions of the pipe expected to have negligible metal loss. The method includes at least one of comparing relative strains at locations with negligible metal loss to those with significant metal loss to accurately determine the thickness of the wall with metal loss; compensating for temperature effects by considering relative strains at areas of the pipe with and without metal loss; and measuring axial strain on the pipe with one or more of the FBGs to correct for at least one of bending and torsion effects on hoop strain.
    • 提供了一种用于确定诸如金属加压管的结构的壁厚的系统和方法。 该系统包括具有多个光纤布拉格光栅(FBG)的光纤,以及用于将FBG固定在管的外表面的离散部分上的安装件,使得加压管壁中的应变传递到FBG。 该系统还包括耦合到光纤端部的光源和光传感器。 光传感器将从FBG反射回来的光转换为数字处理器转换为应变测量的电信号。 FBG安装在预期具有显着金属损失的管道周围,并且管道的部分预期具有可忽略的金属损失。 该方法包括将具有可忽略的金属损失的位置处的相对应变与具有显着金属损失的位置进行比较中的至少一个,以精确地确定具有金属损失的壁的厚度; 通过考虑在具有和不具有金属损失的管道的区域处的相对应变来补偿温度影响; 并用一个或多个FBG测量管道上的轴向应变,以校正环箍应变的弯曲和扭转效应中的至少一种。