公开(公告)号：US20020194917A1

公开(公告)日：2002-12-26

申请号：US10191710

申请日：2002-07-09

申请人： Weatherford/Lamb, Inc.

发明人： Mark R. Fernald ,  Timothy J. Bailey ,  Matthew B. Miller ,  James M. Sullivan ,  James R. Dunphy ,  Michael A. Davis ,  Christopher J. Wright ,  Alan D. Kersey ,  Martin A. Putnam ,  Robert N. Brucato ,  Paul E. Sanders

IPC分类号： G01L009/00

CPC分类号： G01L11/025

摘要： A fiber grating pressure sensor includes an optical sensing element 20,600 which includes an optical fiber 10 having a Bragg grating 12 impressed therein which is encased within and fused to at least a portion of a glass capillary tube 20 and/or a large diameter waveguide grating 600 having a core and a wide cladding and which has an outer transverse dimension of at least 0.3 mm. Light 14 is incident on the grating 12 and light 16 is reflected from the grating 12 at a reflection wavelength null1. The sensing element 20,600 may be used by itself as a sensor or located within a housing 48,60,90,270,300. When external pressure P increases, the grating 12 is compressed and the reflection wavelength null1 changes. The shape of the sensing element 20,600 may have other geometries, e.g., a nulldogbonenull shape, so as to enhance the sensitivity of shift in null1 due to applied external pressure and may be fused to an outer shell 50. At least a portion of the sensing element may be doped between a pair of gratings 150,152, to form a compression-tuned laser or the grating 12 or gratings 150,152 may be constructed as a tunable DFB laser. Also, the axial ends of element 20,600 where the fiber 10 exits the tube 20 may have an inner tapered region 22 and/or a protruding tapered (or fluted) axial section 27 to provide strain relief or improved pull strength for the fiber 10. A temperature grating 270 may be used to measure temperature and allow for a temperature-corrected pressure measurement. The sensor may be suspended within an outer housing 112, by a fluid, spacers, or other means. The invention may also be used as a force transducer.

摘要翻译： 光纤光栅压力传感器包括光学传感元件20,600，光学传感元件20,600包括光纤10，该光纤10具有印刷在其中的布拉格光栅12，该光纤10被封装在玻璃毛细管20和/或大直径波导光栅600的至少一部分内并被熔化 具有芯和宽包层，并且其外横向尺寸至少为0.3mm。 光14入射到光栅12上，光16以反射波长lambd1从光栅12反射。 感测元件20,600可以自身用作传感器或位于壳体48,60,270,300内。 当外部压力P增加时，光栅12被压缩，反射波长lambd1发生变化。 感测元件20,600的形状可以具有其他几何形状，例如“狗骨”形状，以便增强由于施加的外部压力导致的羔羊皮1偏移的灵敏度，并且可以将其熔合到外壳50上。至少一部分 感测元件可以掺杂在一对光栅150,152之间，以形成压缩调谐的激光器，或者光栅12或光栅150,152可被构造为可调DFB激光器。 此外，纤维10离开管20的元件20,600的轴向端部可以具有内锥形区域22和/或突出的锥形（或槽纹）轴向部分27，以为纤维10提供应变消除或改善的拉伸强度。 温度光栅270可用于测量温度并允许进行温度校正的压力测量。 传感器可以通过流体，间隔件或其他装置悬挂在外壳体112内。 本发明也可以用作力传感器。

公开(公告)号：US20040129083A1

公开(公告)日：2004-07-08

申请号：US10646368

申请日：2003-08-22

申请人： Weatherford/Lamb, Inc.

发明人： Mark R. Fernald ,  Timothy J. Bailey ,  Matthew B. Miller ,  James M. Sullivan ,  James R. Dunphy ,  Michael A. Davis ,  Christopher J. Wright ,  Alan D. Kersey ,  Martin A. Putnam ,  Robert N. Brucato ,  Paul E. Saunders

IPC分类号： G01L009/00

CPC分类号： G01L11/025

摘要： A fiber grating pressure sensor includes an optical sensing element which includes an optical fiber having a Bragg grating impressed therein which is encased within and fused to at least a portion of a glass capillary tube and/or a large diameter waveguide grating having a core and a wide cladding. Light is incident on the grating and light is reflected from the grating at a reflection wavelength null1. The sensing element may be used by itself as a sensor or located within a housing. When external pressure P increases, the grating is compressed and the reflection wavelength null1 changes. The shape of the sensing element may have other geometries, e.g., a nulldogbonenull shape, so as to enhance the sensitivity of shift in null1 due to applied external pressure and may be fused to an outer shell.

摘要翻译： 光纤光栅压力传感器包括光学感测元件，其包括其中印有布拉格光栅的光纤，该光纤被封装在玻璃毛细管和/或大直径波导光栅的至少一部分内并且熔融到具有芯和 宽包层 光入射到光栅上，光以反射波长λ1从光栅反射。 感测元件可以自身用作传感器或位于壳体内。 当外部压力P增加时，光栅被压缩，反射波长λ1变化。 感测元件的形状可以具有其他几何形状，例如“狗骨”形状，以便增加由于施加的外部压力而导致的λ1偏移的灵敏度，并且可以将其熔合到外壳。