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1. 发明授权

US5661246A Fiber optic displacement sensor for high temperature environment 失效
标题翻译：光纤位移传感器适用于高温环境
公开(公告)号：US5661246A
公开(公告)日：1997-08-26
申请号：US625203
申请日：1996-04-01
申请人： Keith H. Wanser , Karl Friedrich Voss
发明人： Keith H. Wanser , Karl Friedrich Voss
IPC分类号： G01B11/16 , G01L1/24
CPC分类号： G01B11/18 , G01L1/242
摘要： An assembly which allows use of Fiber Optic Displacement Sensors in a high-temperature environment. The package described is protected against harsh environments. Provisions are taken to allow averaging strains over distances of at least 1/2 to 4 feet, and to allow installation in cramped spaces. A rod is attached to an underlying surface at one point and guided to move in a selected direction of measurement. The distance between a selected movable location on the rod and a point fixed on the surface, is measured using a bent optical fiber having light loss characteristics dependent on that distance. The fiber is gold coated and the holders, guides and other hardware are enclosed in heat shielding trays in which a plurality of sensors are positioned at selected locations along a steam pipe, boiler, vessel or other surface.
摘要翻译：在高温环境中允许使用光纤位移传感器的组件。描述的包装受到恶劣环境的保护。规定了使距离至少为+ E，1/2 + EE至4英尺的平均应变，并允许安装在狭窄的空间。杆在一个点附接到下面的表面并被引导以沿着选定的测量方向移动。使用具有取决于该距离的光损失特性的弯曲光纤来测量棒上所选择的可移动位置与固定在表面上的点之间的距离。纤维是金涂层的，并且保持器，引导件和其他硬件封装在隔热托盘中，其中多个传感器沿着蒸汽管，锅炉，容器或其它表面定位在选定位置。

2. 发明授权

US5668324A Strain sensors having ultra-high dynamic range 失效
标题翻译：应变传感器具有超高的动态范围
公开(公告)号：US5668324A
公开(公告)日：1997-09-16
申请号：US625204
申请日：1996-04-01
申请人： Karl Friedrich Voss , Keith H. Wanser
发明人： Karl Friedrich Voss , Keith H. Wanser
IPC分类号： G01B11/16 , G02B6/02 , H01J5/16
CPC分类号： G01B11/18
摘要： A sensor configuration increases the usefulness of Fiber Optic Displacement Sensors by mounting them on an elastomer substrate. The sensor configuration can also be used for most other sensors. The elastomer substrate is used to pre-mount the sensors, making field installation easier, increasing the range of the sensors, allowing strain sensors to measure compression and elongation, and providing a mechanism whereby the sensors can be protected from failure due to excess strain. The sensing range of the sensor is increased by employing an elastomer substrate to which only a portion provides mounting for the fiber, thereby significantly enhancing the dynamic range of the sensor.
摘要翻译：传感器配置通过将光纤位移传感器安装在弹性体基板上来增加其有用性。传感器配置也可用于大多数其他传感器。弹性体基板用于预先安装传感器，使得现场安装更容易，增加传感器的范围，允许应变传感器测量压缩和伸长率，并提供一种机制，从而可以保护传感器免受过度应变的破坏。通过使用只有一部分提供光纤的安装的弹性体基板来增加传感器的感测范围，从而显着增强传感器的动态范围。

3. 发明授权

US5848204A Fiber devices and sensors based on multimode fiber Bragg gratings 失效
标题翻译：基于多模光纤布拉格光栅的光纤设备和传感器
公开(公告)号：US5848204A
公开(公告)日：1998-12-08
申请号：US525967
申请日：1995-09-08
申请人： Keith H. Wanser
发明人： Keith H. Wanser
IPC分类号： G01D5/353 , G01L1/24 , G02B6/00
CPC分类号： G02B6/02085 , G01D5/35316 , G01L1/246
摘要： New sensing and diagnostic methods are implemented with multimode fiber Bragg gratings (MMFBG) and methods for sensor addressing and multiplexing are described. Real time structural strain and vibration monitoring using optical time domain reflectometry (OTDR) is discussed. The first all-mode, wave optics calculations of the reflectivity of Bragg gratings in highly multimode optical fibers are presented, including the effects of individual mode power changes due to microbending transducer loss upstream from the grating. Two categories of multimode fiber gratings are possible, independent mode and mode coupling, and the fabrication differences between these types of gratings are described. The reflectivity properties of independent mode multimode fiber gratings are examined and compared to single mode fiber gratings. In particular, multimode fiber gratings offer added flexibility in grating design and performance characteristics compared to single mode fiber gratings, because the reflectivity response may be tuned by the spatial periodicity, length, core size, numerical aperture, and mode coupling characteristics of the grating.
摘要翻译：新型传感和诊断方法采用多模光纤布拉格光栅（MMFBG）和传感器寻址和复用方法进行描述。讨论了使用光时域反射计（OTDR）的实时结构应变和振动监测。介绍了高分辨率光纤中布拉格光栅的反射率的第一个全模式波光学计算，包括由光栅上游的微弯曲传感器损耗引起的单模功率变化的影响。描述了两种类型的多模光纤光栅，独立模式和模式耦合，并描述了这些类型的光栅之间的制造差异。检查独立模式多模光纤光栅的反射特性，并将其与单模光纤光栅进行比较。特别地，与单模光纤光栅相比，多模光纤光栅在光栅设计和性能特性方面提供了更大的灵活性，因为反射率响应可以通过光栅的空间周期，长度，核心尺寸，数值孔径和模式耦合特性进行调节。

4. 发明授权

US4834493A Method of terminating an optical fiber 失效
标题翻译：端接光纤的方法
公开(公告)号：US4834493A
公开(公告)日：1989-05-30
申请号：US90546
申请日：1987-08-26
申请人： Richard F. Cahill , Jeffrey A. Eck , Gerald L. Schwantz , John P. Theriault , Philip A. Turek , Eric Udd , Raymond E. Wagoner , Keith H. Wanser
发明人： Richard F. Cahill , Jeffrey A. Eck , Gerald L. Schwantz , John P. Theriault , Philip A. Turek , Eric Udd , Raymond E. Wagoner , Keith H. Wanser
IPC分类号： G01C19/72 , G02B6/255
CPC分类号： G01C19/72 , G02B6/2552
摘要： A fiber-optic rotation sensor particularly adapted to be placed adjacent a drill head to measure the orientation of a drill string with respect to the axis of rotation of the earth during or after drilling for minerals such as oil and gas. The analog sensor is based on a Sagnac interferometer and uses light beams counterrotating in one or more oblong circular shaped coils of optical fiber in which dual phase modulators are used to generate an AC signal to enable detection of a rotation rate output. The sensor also includes means to mechanically or electrically flip to sensitive axis of the rotation sensor to null out bias drift. If one coil is used, the flipping is in 90.degree. segments. When two coils at 90.degree. to each other are used, they are flipped 180.degree..
摘要翻译：一种光纤旋转传感器，特别适于放置在钻头附近，以便在诸如石油和天然气的矿物钻孔期间或之后相对于地球的旋转轴线测量钻柱的取向。模拟传感器基于Sagnac干涉仪，并且使用在一个或多个长圆形的光纤线圈中逆向旋转的光束，其中使用双相位调制器来产生AC信号以使得能够检测转速输出。传感器还包括机械地或电气地转动到旋转传感器的敏感轴的装置，以消除偏置漂移。如果使用一个线圈，则翻转为90度。当使用彼此为90°的两个线圈时，它们被翻转180度。

5. 发明授权

US4743116A Microbending optical fiber accelerometer and gyroscope 失效
标题翻译：微弯光纤加速度计和陀螺仪
公开(公告)号：US4743116A
公开(公告)日：1988-05-10
申请号：US785335
申请日：1985-10-07
申请人： Eric Udd , Philip M. Gretzkowski , Keith H. Wanser
发明人： Eric Udd , Philip M. Gretzkowski , Keith H. Wanser
IPC分类号： G01C19/72 , G01P15/093 , G02B6/24 , G01B9/02
CPC分类号： G01C19/72 , G01P15/093 , G02B6/24
摘要： There is provided by this invention a fiber optic transducer for accelerometers and gyroscopes that utilize microbending of an optical fiber between two suspended points by vibrating the optical fiber with electro-static deflection to induce modulation of a light signal to sense acceleration, tension, etc. The amplitude modulation of the light signal induced by the bending lost in the vibrating fiber is demodulated with respect to reference signals to derive an output proportional to acceleration, tension, or other environmental factors.
摘要翻译：本发明提供了一种用于加速度计和陀螺仪的光纤传感器，其通过使静电偏转光纤振动，以诱导调制光信号以感测加速度，张力等，利用光纤在两个悬挂点之间的微弯曲。相对于参考信号解调由振动光纤中损失的弯曲引起的光信号的振幅调制，以得到与加速度，张力或其他环境因素成比例的输出。

6. 发明授权

US4712306A Fiber optic earth rotation gyro compass 失效
标题翻译：光纤地球旋转陀螺罗盘
公开(公告)号：US4712306A
公开(公告)日：1987-12-15
申请号：US813721
申请日：1985-12-27
申请人： Richard F. Cahill , Jeffrey A. Eck , Gerald L. Schwantz , John P. Theriault , Philip A. Turek , Eric Udd , Raymond E. Wagoner , Keith H. Wanser
发明人： Richard F. Cahill , Jeffrey A. Eck , Gerald L. Schwantz , John P. Theriault , Philip A. Turek , Eric Udd , Raymond E. Wagoner , Keith H. Wanser
IPC分类号： G01C19/72 , G02B6/255 , G01C19/64
CPC分类号： E21B47/022 , G01C19/72 , G02B6/2552
摘要： A fiber-optic rotation sensor particularly adapted to be placed adjacent a drill head to measure the orientation of a drill string with respect to the axis of rotation of the earth during or after drilling for minerals such as oil and gas. The analog sensor is based on a Sagnac interferometer and uses light beams counterrotating in one or more oblong circular shaped coils of optical fiber in which dual phase modulators are used to generate an AC signal to enable detection of a rotation rate output. The sensor also includes means to mechanically or electrically flip the sensitive axis of the rotation sensor to null out bias drift. If one coil is used, the flipping is in 90.degree. segments. When two coils at 90.degree. to each other are used, they are flipped 180.degree..
摘要翻译：一种光纤旋转传感器，特别适于放置在钻头附近，以便在诸如石油和天然气的矿物钻孔期间或之后相对于地球的旋转轴线测量钻柱的取向。模拟传感器基于Sagnac干涉仪，并且使用在一个或多个长圆形的光纤线圈中逆向旋转的光束，其中使用双相位调制器来产生AC信号以使得能够检测转速输出。该传感器还包括机械地或电动地翻转旋转传感器的敏感轴以消除偏移漂移的装置。如果使用一个线圈，则翻转为90度。当使用彼此为90°的两个线圈时，它们被翻转180度。

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