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公开(公告)号：US08322919B2
公开(公告)日：2012-12-04
申请号：US12698646
申请日：2010-02-02
申请人： Nicholas Lagakos , Joseph A Bucaro
发明人： Nicholas Lagakos , Joseph A Bucaro
CPC分类号： G01K5/62
摘要： A fiber-optic temperature sensor with a cantilever beam including two different material strips with different thermal expansion coefficients, the cantilever beam having a reflective surface on an end of the cantilever beam, an optical fiber probe including a transmitting multimode optical fiber and at least one receiving multimode optical fiber for receiving reflected light from the reflective surface. Temperature changes at the sensor are indicated by a change in reflected light coupled into the receiving multimode optical fiber due to lateral displacement of the edge of the reflective surface caused by bending of the cantilever beam. Some embodiments have additional reference receiving fibers for compensation for noise, changes in gap length, and other factors.
摘要翻译： 一种具有悬臂梁的光纤温度传感器，包括具有不同热膨胀系数的两个不同的材料条，悬臂梁在悬臂梁的一端具有反射表面，包括发射多模光纤的光纤探头和至少一个 接收用于接收来自反射表面的反射光的多模光纤。 传感器的温度变化由耦合到接收多模光纤中的反射光的变化表示，这是由于由悬臂梁的弯曲引起的反射表面的边缘的横向位移。 一些实施例具有用于补偿噪声，间隙长度变化和其他因素的附加参考接收光纤。
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公开(公告)号：US20090196543A1
公开(公告)日：2009-08-06
申请号：US12246761
申请日：2008-10-07
IPC分类号： G02B6/00
CPC分类号： G02B6/3514 , G01D5/268 , G01D5/30 , G01P15/0802 , G01P15/093 , G01P2015/0828 , G02B6/3552 , G02B6/3558 , G02B6/3566 , G02B6/3594
摘要： A fiber optic sensor for detecting acceleration or displacement includes a fiber optic probe with a multimode transmitting optical fiber, a multimode receiving optical fiber and a edge reflector spaced apart from the fiber probe. The reflector moves in a transverse direction substantially normal to the longitudinal axis of the fiber optic probe, so the amount of light received by the receiving fiber indicates a relative acceleration or a relative displacement of the reflective surface with respect to the fiber probe in the transverse direction of motion of the edge of the reflector. The reflector can be mounted on a cantilever beam. The sensor can have one transmitting fiber, two receiving fiber, and a reflector with two edges, each edge partially covering one of the receiving fibers. A triaxial sensor system has at least two two-fiber sensors.
摘要翻译： 用于检测加速度或位移的光纤传感器包括具有多模发射光纤的光纤探针，多模接收光纤和与光纤探针间隔开的边缘反射器。 反射器在基本上垂直于光纤探针的纵向轴线的横向方向上移动，因此由接收光纤接收的光量表示反射表面相对于光纤探头在横向上的相对加速度或相对位移 反射器边缘的运动方向。 反射器可以安装在悬臂梁上。 传感器可以具有一个发送光纤，两个接收光纤和一个具有两个边缘的反射器，每个边缘部分地覆盖一个接收光纤。 三轴传感器系统具有至少两个双纤维传感器。
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公开(公告)号：US07379630B2
公开(公告)日：2008-05-27
申请号：US11250709
申请日：2005-10-07
申请人： Nicholas Lagakos , Joseph A Bucaro
发明人： Nicholas Lagakos , Joseph A Bucaro
IPC分类号： G02B6/00
CPC分类号： G01L9/0077 , G01L7/086 , G01P15/093 , G02B6/06 , G02B6/2817 , G02B6/3512 , G02B6/3558 , G02B6/3594 , G02B2006/12138
摘要： A multiplexed fiber optic sensor system including a first optical fiber having a first end arranged to receive light from a light souce, at least two optical fibers having diameters smaller than the first optical fiber, and at least two fiber optic sensors, each of the at least two smaller diameter optical fibers arranged between the first optical fiber and one of the sensors for transmitting light from the first optical fiber to that sensor. The sensors can be static or dynamic pressure sensors, strain sensors, temperature sensors or other environmental sensors.
摘要翻译： 一种复用光纤传感器系统，包括第一光纤，第一光纤具有布置成从光源接收光的第一端，具有小于第一光纤的直径的至少两根光纤，以及至少两根光纤传感器， 布置在第一光纤和用于将光从第一光纤传输到该传感器的传感器之一中的至少两个较小直径的光纤。 传感器可以是静态或动态压力传感器，应变传感器，温度传感器或其他环境传感器。
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4.发明授权System for determining an interior or exterior acoustic noise level of an enclosed structure and noise reduction device incorporating such system 失效用于确定包含该系统的封闭结构和降噪装置的内部或外部声学噪声水平的系统
公开(公告)号：US5642445A
公开(公告)日：1997-06-24
申请号：US551081
申请日：1995-10-31
CPC分类号： G01H3/12
摘要： The acoustic noise monitor determines acoustic sound levels radiated or stered to an exterior or interior fluid space of a structure such as an enclosed structure by measuring a condition, such as strain level, of the structure itself rather than by directly measuring the fluid itself. From the strain or other condition measured on the structure, the acoustic sound levels can be calculated with the Helmholtz integral. The sensors on the structure are preferably spaced so that non-radiating high wave-number motions of the structure are averaged out. The acoustic noise monitor can be used with submarines, jet aircraft, cars, or the like.
摘要翻译： 声学噪声监测器通过测量结构本身的状态（例如应变水平）来确定辐射或散射到诸如封闭结构的结构的外部或内部流体空间的声音水平，而不是通过直接测量流体本身。 根据在结构上测量的应变或其他条件，可以用亥姆霍兹积分计算声学声级。 结构上的传感器优选间隔开，使得结构的非辐射高波数运动被平均化。 声学噪声监测器可用于潜艇，喷气飞机，汽车等。
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公开(公告)号：US5633960A
公开(公告)日：1997-05-27
申请号：US719918
申请日：1996-09-25
申请人： Nicholas Lagakos , Joseph A. Bucaro
发明人： Nicholas Lagakos , Joseph A. Bucaro
CPC分类号： G01H9/00 , G01H9/004 , G01P15/093 , G02B6/02395 , G02B6/3624 , G02B6/3608
摘要： An optical fiber which includes a light transmitting center portion, a prcting layer and a stress preventing layer. The protecting layer concentrically surrounds the center portion and the stress preventing layer concentrically surrounds the center portion and is positioned between the protecting layer and the center portion. The stress preventing layer has a Young's Modulus substantially lower than the Young's Modulus of the protecting layer. The optical fiber can be used in a sensor, wherein the sensor includes an encapsulant and the fiber is embedded in the encapsulant. The embedded fiber is arranged in a pancaked spiral configuration in the encapsulant. Alternatively, the embedded fiber can be arranged to form a plurality of sequential loops. The plurality of sequential loops are then arranged in the same plane as a spiral, where each of the plurality of sequential loops are perpendicular to the plane. A decoupler is also provided for attaching the sensor to a structure, to reduce stretching motion affecting the sensor.
摘要翻译： 一种光纤，其包括透光中心部分，保护层和应力防止层。 保护层同心地围绕中心部分并且应力防止层同心地围绕中心部分并且位于保护层和中心部分之间。 应力防止层的杨氏模量基本上低于保护层的杨氏模量。 光纤可以用在传感器中，其中传感器包括密封剂，并且光纤嵌入密封剂中。 嵌入式光纤在密封剂中以扁平螺旋形配置。 或者，嵌入式光纤可以被布置成形成多个顺序环路。 然后，多个顺序环路布置在与螺旋相同的平面中，其中多个顺序环路中的每一个垂直于该平面。 还提供了用于将传感器附接到结构上的解耦器，以减少影响传感器的伸展运动。
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6.发明授权Planar and linear fiber optic acoustic sensors embedded in an elastomer material 失效平面和线性光纤声学传感器嵌入弹性材料
公开(公告)号：US5367376A
公开(公告)日：1994-11-22
申请号：US932685
申请日：1992-08-20
申请人： Nicholas Lagakos , Joseph A. Bucaro
发明人： Nicholas Lagakos , Joseph A. Bucaro
摘要： A interferometric planar and linear fiber optic sensor system comprised of a sensor element and a reference element. In the planar fiber optic sensor system the sensor and reference fibers are shaped in loops circularly and uniformly, heat treated or bonded together and embedded in a spiral pattern within a low Bulk Modulus and Young's Modulus elastomer encapsulant. The invention results in high and frequency independent sensitivity which minimizes acceleration effects. For the linear sensor, the sensing fiber is shaped in loops forming a linear chain which is embedded in an appropriate low bulk modulus elastomeric encapsulant. The reference fiber is shaped in loops around a cylindrical aluminum mandrel within which the input and output fiber cables and couplers are encapsulated in a high bulk modulus material epoxy resin. In both the planar and linear forms, the sensing and reference fiber may be of equal length, however, the reference fiber may be of a shorter length when a coherent light source is utilized.
摘要翻译： 由传感器元件和参考元件组成的干涉式平面和线性光纤传感器系统。 在平面光纤传感器系统中，传感器和参考光纤环形和均匀地成形，热处理或粘合在一起，并以低体积模量和杨氏模量弹性体密封剂内的螺旋图案嵌入。 本发明导致高和频率无关的灵敏度，其最小化加速效应。 对于线性传感器，感测纤维成形为环形，其形成嵌入适当的低体积弹性密封剂的线性链。 参考光纤围绕圆柱形铝心轴成环，其中输入和输出光纤电缆和耦合器封装在高体积模量材料环氧树脂中。 在平面和线性形式中，感测和参考光纤可以具有相等的长度，然而，当使用相干光源时，参考光纤可以具有较短的长度。
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公开(公告)号：US4979798A
公开(公告)日：1990-12-25
申请号：US423176
申请日：1989-10-18
申请人： Nicholas Lagakos , Joseph A. Bucaro
发明人： Nicholas Lagakos , Joseph A. Bucaro
CPC分类号： G01H9/004 , G02B6/02395
摘要： The acoustic pressure sensitivity of an optical fiber waveguide is maximized by surrounding it with an outer coating which is selected from a material having high Young's modulus and low bulk modulus.
摘要翻译： 通过用选自具有高杨氏模量和低体积弹性模量的材料的外涂层围住光纤波导的声压灵敏度最大化。
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公开(公告)号：US08195013B2
公开(公告)日：2012-06-05
申请号：US12692830
申请日：2010-01-25
申请人： Nicholas Lagakos , Joseph A Bucaro
发明人： Nicholas Lagakos , Joseph A Bucaro
IPC分类号： G02B6/00
CPC分类号： G01K5/62
摘要： An intensity-based fiber optic temperature sensor having a fiber probe with a multimode transmit/receive fiber, a reflector spaced apart from the end of the fiber, and a housing affixed at its ends to the fiber probe and reflector, the housing having a larger or smaller thermal expansion coefficient than those of the fiber probe and reflector. Temperature changes cause a change in the gap distance between the fiber end and the reflector, changing the amount of reflected light coupled into the optical fiber. Temperature sensors can also have a fiber probe with two or more multimode receiving fibers surrounding a transmitting fiber. Other temperature sensors include a fiber probe with a multimode transmitting fiber, a reference multimode receiving fiber and a sensing multimode receiving fiber for reducing noise effects.
摘要翻译： 一种基于强度的光纤温度传感器，其具有具有多模发射/接收光纤的光纤探头，与光纤的端部间隔开的反射器，以及在其端部固定到光纤探头和反射器的外壳，壳体具有较大的 或更小的热膨胀系数。 温度变化导致光纤端和反射器之间的间隙距离的变化，改变耦合到光纤中的反射光的量。 温度传感器还可以具有光纤探针，其具有围绕发射光纤的两个或多个多模接收光纤。 其他温度传感器包括具有多模发射光纤的光纤探头，参考多模接收光纤和用于降低噪声影响的感测多模接收光纤。
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公开(公告)号：US20110044575A1
公开(公告)日：2011-02-24
申请号：US12692830
申请日：2010-01-25
申请人： Nicholas Lagakos , Joseph A. Bucaro
发明人： Nicholas Lagakos , Joseph A. Bucaro
CPC分类号： G01K5/62
摘要： An intensity-based fiber optic temperature sensor having a fiber probe with a multimode transmit/receive fiber, a reflector spaced apart from the end of the fiber, and a housing affixed at its ends to the fiber probe and reflector, the housing having a larger or smaller thermal expansion coefficient than those of the fiber probe and reflector. Temperature changes cause a change in the gap distance between the fiber end and the reflector, changing the amount of reflected light coupled into the optical fiber. Temperature sensors can also have a fiber probe with two or more multimode receiving fibers surrounding a transmitting fiber. Other temperature sensors include a fiber probe with a multimode transmitting fiber, a reference multimode receiving fiber and a sensing multimode receiving fiber for reducing noise effects.
摘要翻译： 一种基于强度的光纤温度传感器，其具有具有多模发射/接收光纤的光纤探头，与光纤端部间隔开的反射器，以及在其端部固定在光纤探头和反射器上的壳体，该壳体具有较大的 或更小的热膨胀系数。 温度变化导致光纤端和反射器之间的间隙距离的变化，改变耦合到光纤中的反射光的量。 温度传感器还可以具有光纤探针，其具有围绕发射光纤的两个或多个多模接收光纤。 其他温度传感器包括具有多模发射光纤的光纤探头，参考多模接收光纤和用于降低噪声影响的感测多模接收光纤。
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公开(公告)号：US07460740B2
公开(公告)日：2008-12-02
申请号：US11250708
申请日：2005-10-07
申请人： Nicholas Lagakos , Joseph A Bucaro
发明人： Nicholas Lagakos , Joseph A Bucaro
IPC分类号： G02B6/26
CPC分类号： G01L9/0077 , G01L7/086 , G01P15/093 , G02B6/06 , G02B6/4292
摘要： A fiber optic sensor for measuring static pressure includes a cartridge housing having an end that is exposed to the atmosphere, a thin flexible membrane covering the exposed end of the cartridge housing such that the flexible membrane has an exposed side and a protected side, and a fiber bundle disposed within the cartridge housing, the fiber bundle comprising at least one fiber having a first polished end for transmitting light toward the membrane and a second end for being coupled to a light source or a receiver, the housing arranged to maintain the membrane at a distance from the first end of the fiber in a direction along a fiber axis, with free space between the first fiber end and the protected side of the flexible membrane.
摘要翻译： 用于测量静压的光纤传感器包括具有暴露于大气的端部的盒壳体，覆盖盒壳体的暴露端的薄柔性膜，使得柔性膜具有暴露侧面和受保护侧面，以及 所述纤维束包括至少一个纤维，所述纤维具有用于将光朝向所述膜传播的第一抛光端和用于耦合到光源或接收器的第二端，所述壳体被布置成将膜保持在 在纤维的第一端沿着纤维轴的方向的距离，在柔性膜的第一纤维端和受保护侧之间具有自由空间。
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