-
31.发明授权Bourdon tube pressure gauge with integral optical strain sensors for measuring tension or compressive strain 失效波登管压力表，用于测量张力或压缩应变的积分光学应变传感器
公开(公告)号：US5877426A
公开(公告)日：1999-03-02
申请号：US883858
申请日：1997-06-27
CPC分类号： G01L9/0032 , G01L19/0092
摘要： A Bourdon tube pressure gauge is mounted for sensing the pressure of a system. The Bourdon tube is connected to at least one optical strain sensor mounted to be strained by movement of the Bourdon tube such that when the Bourdon tube is exposed to the pressure of the system, movement of the tube in response to system pressure causes a strain in the optical sensor. The optical sensor is responsive to the strain and to an input optical signal for providing a strain optical signal which is directly proportional to the pressure. A reference or temperature compensation optical sensor is isolated from the strain associated with the pressure of the system and is responsive to temperature of the system for causing a temperature-induced strain. The reference optical sensor is responsive to the temperature induced strain and the input optical signal for providing a temperature optical signal which is directly proportional to the temperature of the system. The temperature optical signal is provided for temperature compensation of the strain optical signal. The optical sensors include an optical fiber having intrinsic Bragg grating sensors formed in the optical fiber. The optical fiber is attached to a reference point and to the Bourdon tube such that changes in the position of the tube changes the strain on the optical fiber resulting in a wavelength shift of light reflected by the Bragg grating. The magnitude of the wavelength shift is directly proportional to a change in pressure.
摘要翻译： 安装了波登管压力表，用于感测系统的压力。 布尔登管连接至至少一个光学应变传感器，该光学应变传感器安装成通过波登管的运动而变形，使得当波登管暴露于系统的压力时，管的响应于系统压力的运动导致应变 光学传感器。 光学传感器响应于应变和输入光信号，以提供与压力成正比的应变光信号。 参考或温度补偿光学传感器与与系统压力相关的应变分离，并响应于系统的温度导致温度引起的应变。 参考光学传感器响应于温度感应应变和输入光信号，以提供与系统的温度成正比的温度光信号。 温度光信号用于应变光信号的温度补偿。 光学传感器包括在光纤中形成有本征Bragg光栅传感器的光纤。 光纤连接到参考点和布尔登管，使得管的位置变化改变光纤上的应变，导致由布拉格光栅反射的光的波长偏移。 波长偏移的大小与压力的变化成正比。
-
公开(公告)号：US08422835B2
公开(公告)日：2013-04-16
申请号：US11172616
申请日：2005-06-30
申请人： James R. Dunphy , John J. Sgambelluri , John Grunbeck , George Talmadge , Robert F. Robinson , James M. Sullivan , Joseph F. Robbins
发明人： James R. Dunphy , John J. Sgambelluri , John Grunbeck , George Talmadge , Robert F. Robinson , James M. Sullivan , Joseph F. Robbins
IPC分类号： G02B6/00
CPC分类号： G02B6/4248 , E21B47/123 , G01L11/025 , G02B6/24 , G02B6/4428
摘要： An optical waveguide feedthrough assembly passes at least one optical waveguide through a bulk head, a sensor wall, or other feedthrough member. The optical waveguide feedthrough assembly comprises a cane-based optical waveguide that forms a glass plug sealingly disposed in a feedthrough housing. For some embodiments, the optical waveguide includes a tapered surface biased against a seal seat formed in the housing. The feedthrough assembly can include an annular gold gasket member disposed between the tapered surface and the seal seat. The feedthrough assembly can further include a backup seal. The backup seal comprises an elastomeric annular member disposed between the glass plug and the housing. The backup seal may be energized by a fluid pressure in the housing. The feedthrough assembly is operable in high temperature and high pressure environments.
摘要翻译： 光波导馈通组件使至少一个光波导通过散装头，传感器壁或其它馈通构件。 光波导馈通组件包括基于基准的光波导，其形成密封地布置在馈通壳体中的玻璃塞。 对于一些实施例，光波导包括朝向形成在壳体中的密封座偏压的锥形表面。 馈通组件可以包括设置在锥形表面和密封座之间的环形金垫片构件。 馈通组件还可以包括备用密封件。 备用密封件包括布置在玻璃塞和壳体之间的弹性环形构件。 备用密封件可以通过壳体中的流体压力来激励。 馈通组件可在高温和高压环境中操作。
-
公开(公告)号：US07447390B2
公开(公告)日：2008-11-04
申请号：US11172617
申请日：2005-06-30
申请人： James R. Dunphy , John J. Sgambelluri , John Grunbeck , George Talmadge , Robert F. Robinson , James M. Sullivan , Joseph F. Robbins
发明人： James R. Dunphy , John J. Sgambelluri , John Grunbeck , George Talmadge , Robert F. Robinson , James M. Sullivan , Joseph F. Robbins
IPC分类号： G02B6/00
CPC分类号： G01L1/246 , G01L11/02 , G01L11/025 , G02B6/4248
摘要： Optical sensors used in harsh environments require a sealed pressure tight passage of an optical waveguide into an interior of the sensor. In one embodiment, a pressure sensor assembly for determining the pressure of a fluid in a harsh environment includes a sensing element suspended within a fluid filled housing. An optical waveguide that provides communication with the sensing element couples to a feedthrough assembly, which includes a cane-based optical waveguide forming a glass plug sealingly disposed in the housing. The glass plug provides optical communication between the optical waveguide and the sensing element. A pressure transmitting device can transmit the pressure of the fluid to the fluid within the housing. The assembly can maintain the sensing element in a near zero base strain condition and can protect the sensing element from shock/vibration.
摘要翻译： 在恶劣环境中使用的光学传感器需要将光波导的密封压力紧密通过到传感器的内部。 在一个实施例中，用于确定在恶劣环境中的流体的压力的压力传感器组件包括悬挂在流体填充的壳体内的感测元件。 提供与感测元件的连通的光波导耦合到馈通组件，馈通组件包括形成密封地设置在壳体中的玻璃插头的基于基准的光波导。 玻璃插头提供光波导和感测元件之间的光通信。 压力传递装置可以将流体的压力传递到壳体内的流体。 组件可以将感测元件保持在接近零的基本应变状态，并且可以保护感测元件免受冲击/振动。
-
34.发明授权Optical fiber entry strain relief interface for compression-molded structures 失效用于压缩模制结构的光纤入口应变消除界面
公开(公告)号：US5604836A
公开(公告)日：1997-02-18
申请号：US570049
申请日：1995-12-11
申请人： James R. Dunphy , Robert M. Rukus , Jong-Min Ha
发明人： James R. Dunphy , Robert M. Rukus , Jong-Min Ha
CPC分类号： G02B6/3644 , G02B6/3887
摘要： An optical fiber entry strain relief interface includes a composite structure (lay-up) 10 having an optical fiber 20 embedded therein. The optical fiber 20 enters (or exits) the lay-up 10 at at least one point 24 and passes through transition layers 47 comprising an adhesive film 42, a thin rubber sealing layer 44, and a thick rubber strain relief layer 46, and through a polymer plug 48 located above the layer 46. The lay-up is consolidated by heating the lay-up over a temperature profile and applying pressure through mostly closed compression molding tools 30,32. The adhesive film 42 bonds the adjacent layer 44 to the upper surface of the lay-up 10, the sealing layer 44 becomes soft enough to seal around the fiber 20 at a temperature lower than the temperature at which the resin 16 exhibits a low enough viscosity to leak out of the lay-up 10, thereby preventing the resin from leaking out of the lay-up 10 during lay-up consolidation, the strain relief layer 46 provides a rubber strain relief for the optical fiber 20, and the plug 48 supports the layers 47 during consolidation.
摘要翻译： 光纤入口应变消除接口包括嵌入其中的光纤20的复合结构（叠层）10。 光纤20在至少一个点24处进入（或离开）叠层10，并穿过包括粘合膜42，薄橡胶密封层44和厚橡胶应变消除层46的过渡层47，并通过 位于层46上方的聚合物塞48.通过在温度分布上加热叠层并通过大部分封闭的压缩模制工具30,32施加压力来将叠层固结。 粘合膜42将相邻层44粘合到层叠体10的上表面，密封层44变得足够柔软，以便在低于树脂16表现出足够低粘度的温度的温度下围绕纤维20密封 从层叠体10漏出，从而防止树脂在层叠固结期间从层叠体10泄漏出来，应变消除层46为光纤20提供橡胶应变消除，插头48支承 巩固期间的层47。
-
公开(公告)号：US5401956A
公开(公告)日：1995-03-28
申请号：US129217
申请日：1993-09-29
CPC分类号： G01D5/35335 , G01D5/35312
摘要： An optical sensor diagnostic system includes a tunable narrow wavelength-band source 9 which provides a variable wavelength light 44 into an optical fiber 32,52. Reflective sensors 54,58, such as Bragg gratings, are disposed along the fiber 52 in the path of the variable light 44. The sensors 54,58 transmit light 56,60 having a minimum transmission wavelength which varies due to a perturbation, such as strain, imposed thereon. A tuner control circuit 42 drives the tunable light source 9 to cause the source light 44 to scan across a predetermined wavelength range to illuminate each sensor at its minimum transmission wavelength. The power of the transmitted light is converted to an electrical signal by a detector 64 and monitored by a signal processor 68 which detects drops in transmitted power level and provides output signals on lines 71 indicative of the perturbation for each sensor. The system may be configured in open loop mode to measure static strains, or closed loop mode to track static strains and measure dynamic strains. Also, the system may be used in a Fabry-Perot configuration to provide a very sensitive strain detection system. Further, the system may be configured in reflection or transmission mode.
摘要翻译： 光学传感器诊断系统包括可调谐窄波段光源9，其将可变波长光44提供到光纤32,52中。 诸如布拉格光栅的反射传感器54,58沿着可变光44的路径中的光纤52布置。传感器54,58透射具有由于扰动而变化的最小透射波长的光56,60，例如 应变。 调谐器控制电路42驱动可调谐光源9，以使源光44在预定波长范围内扫描，以以最小透射波长照亮每个传感器。 透射光的功率由检测器64转换成电信号，并由信号处理器68监视，信号处理器68检测发射功率电平的下降，并在线71上提供指示每个传感器扰动的输出信号。 该系统可以以开环模式配置，以测量静态应变，或闭环模式来跟踪静态应变并测量动态应变。 此外，该系统可以以法布里 - 珀罗（Fabry-Perot）配置使用，以提供非常敏感的应变检测系统。 此外，系统可以被配置为反射或传输模式。
-
公开(公告)号：US4482247A
公开(公告)日：1984-11-13
申请号：US512311
申请日：1983-07-08
CPC分类号： G01N21/53 , G01N2021/151
摘要： A sensor employs a laser to obtain a collimated light beam for transmission across the gas effluent of a catalytic cracking process. Particulate matter entrained in the gas flow forward scatters light energy to a collecting aperture which, in turn focuses the scattered light on a first photodetector. A second photodetector receives directly transmitted light energy. A ratio between the output signals of the two photodetectors is derived and presented to a threshold level detector. If the magnitude of the scatter exceeds a predetermined level it is concluded that a catalyst load dump has occurred. The optical system is carefully selected to ensure that only light energy scattered from a sample volume within the entrained gas flow reaches the first photodetector. This is important because it prevents particulate matter on the surfaces of the transparent windows from affecting the operating of the sensor.
摘要翻译： 传感器采用激光器获得准直光束，用于穿过催化裂化过程的气体流出物。 携带在气体流中的颗粒物质将光能分散到收集孔，聚集孔又将散射光聚焦在第一光电检测器上。 第二光电检测器接收直接透射的光能。 导出两个光电检测器的输出信号之间的比率并将其呈现给阈值电平检测器。 如果散射的大小超过预定水平，则可以得出结论，已经发生了催化剂负载突降。 仔细选择光学系统，以确保只有从夹带气体流中的样品体积散射的光能才能到达第一光电检测器。 这是重要的，因为它可以防止透明窗口表面上的颗粒物质影响传感器的运行。
-
公开(公告)号：US06789424B2
公开(公告)日：2004-09-14
申请号：US10366900
申请日：2003-02-14
申请人： Sverre Knudsen , Arne Berg , James R. Dunphy , Daniel Woo
发明人： Sverre Knudsen , Arne Berg , James R. Dunphy , Daniel Woo
IPC分类号： G01P1508
CPC分类号： G01V1/181 , G01P15/093 , G01V1/226
摘要： A highly sensitive accelerometer for determining the acceleration of a structure includes a mass within a housing suspended by opposing support members. The support members are alternately wound around a pair of fixed mandrels and the mass in a push pull arrangement. At least a portion of one of the support members comprises a transducer capable measuring the displacement of the mass within the housing. An embodiment of the invention employs optical fiber coils as the support members for use in interferometric sensing processes. Arrays of such interferometer based accelerometers may be multiplexed using known techniques.
摘要翻译： 用于确定结构的加速度的高度敏感的加速度计包括由相对的支撑构件悬挂的壳体内的质量。 支撑构件交替地卷绕在一对固定的心轴和质量块的推拉装置中。 支撑构件中的一个的至少一部分包括能够测量壳体内的质量的位移的换能器。 本发明的实施例采用光纤线圈作为用于干涉测量过程的支撑构件。 可以使用已知技术来复用这种基于干涉仪的加速度计的阵列。
-
公开(公告)号：US5493113A
公开(公告)日：1996-02-20
申请号：US346104
申请日：1994-11-29
申请人： James R. Dunphy , James J. Ryan
发明人： James R. Dunphy , James J. Ryan
IPC分类号： C23C14/14 , C23C14/24 , G01D5/353 , G01M11/00 , G01M11/08 , G01N17/00 , G01N21/45 , G02F1/21 , G01J4/00 , G01J5/08
CPC分类号： G01M11/083 , G01D5/35383 , G01N17/00 , G01N21/45
摘要： A highly sensitive optical fiber cavity coating removal detector employs an optical fiber 18 having a pair of Bragg gratings 20,30 embedded therein and separated by a section of fiber making up an optical cavity 26. The optical path length of the cavity 26 is sized with the central reflection wavelength of the fiber gratings 20,30 so as to create an optical resonator. The cavity 26 is coated with a material 40 which corrodes or is otherwise removable, such as aluminum. The coating 40 exerts forces 46 radially inward on the cavity 26 so as to cause the refractive index of the cavity and thus its optical path length to change, thereby causing the resonator to come out of resonance. The forces 46 on the cavity 26 are reduced when the coating 40 corrodes, thereby causing the resonator to re-enter resonance. Additionally, the coating causes optical losses to exist due to non-uniform variations in refractive index caused by non-uniform forces from coating irregularities.
摘要翻译： 高灵敏度的光纤腔涂层去除检测器采用光纤18，其具有嵌入其中的一对布拉格光栅20,30，并由构成光腔26的纤维的一部分隔开。空腔26的光路长度的大小与 光纤光栅20,30的中心反射波长，以便产生光学谐振器。 空腔26涂覆有腐蚀或其它可移除的材料40，例如铝。 涂层40在空腔26上径向向内施加力46，以使空腔的折射率和其光程长度发生变化，从而使谐振器脱离共振。 当涂层40腐蚀时，空腔26上的力46减小，从而使谐振器重新进入共振。 此外，由于涂层不均匀的不均匀的力引起的折射率的不均匀的变化，涂层会导致光学损失。
-
公开(公告)号：US07013729B2
公开(公告)日：2006-03-21
申请号：US10933132
申请日：2004-09-02
申请人： Sverre Knudsen , Arne Berg , James R. Dunphy , Daniel Woo
发明人： Sverre Knudsen , Arne Berg , James R. Dunphy , Daniel Woo
IPC分类号： G01P15/08
CPC分类号： G01V1/181 , G01P15/093 , G01V1/226
摘要： A highly sensitive accelerometer for determining the acceleration of a structure includes a mass within a housing suspended by opposing support members. The support members are alternately wound around a pair of fixed mandrels and the mass in a push pull arrangement. At least a portion of one of the support members comprises a transducer capable measuring the displacement of the mass within the housing. An embodiment of the invention employs optical fiber coils as the support members for use in interferometric sensing processes. Arrays of such interferometer based accelerometers may be multiplexed using known techniques.
-
公开(公告)号：US06885785B2
公开(公告)日：2005-04-26
申请号：US10894153
申请日：2004-07-19
申请人： James R. Dunphy , James J. Ryan
发明人： James R. Dunphy , James J. Ryan
IPC分类号： G01B11/16 , B29C35/02 , B29C70/54 , C03C25/10 , G01D5/353 , G01M11/08 , G01N11/00 , G01N33/44 , G02B6/00
CPC分类号： G01M11/083 , B29C35/0288 , B29C70/54 , B29K2105/108 , C03C25/1063 , G01B11/18 , G01D5/35316 , G01M11/086 , G01N33/44 , G02B6/02104 , G02B6/022
摘要： An optical corrosion sensor employs an optical fiber Bragg grating 20 embedded within an optical fiber 18. The grating 20 has a coating 40 made of a material, such as aluminum, which corrodes or can otherwise be removed. The coating 40 exerts forces 46 radially inward around and along the grating 20 so as to cause the wavelength bandwidth of the grating reflectivity profile to become broader and to be shifted relative to its uncoated condition. Also, the forces on the grating 20 are reduced when the coating corrodes, thereby causing the wavelength bandwidth and shift of the reflectivity profile of the grating to narrow and to return to its uncoated condition.
摘要翻译： 光学腐蚀传感器采用嵌入在光纤18内的光纤布拉格光栅20。 光栅20具有由诸如铝的材料制成的涂层40，其被腐蚀或以其它方式被去除。 涂层40在光栅20周围沿径向向内施加力46，以使光栅反射率分布的波长带宽变得更宽并相对于其未涂覆的状态移动。 此外，当涂层腐蚀时，光栅20上的力减小，从而导致光栅的波长带宽和反射率分布的偏移变窄并返回到其未涂覆状态。
-
-
-
-
-
-
-
-
-
搜索结果
48 条记录 (耗时 0.06 秒)
