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公开(公告)号：US07502531B2
公开(公告)日：2009-03-10
申请号：US11314729
申请日：2005-12-21
摘要： A method and apparatus for monitoring one or more environmental parameters using interferometric sensor(s), a cross-correlator, a two-dimensional photosensitive array and optical focusing means are described. The method and apparatus allows for near simultaneous monitoring of the parameter(s) of interest.
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2.发明授权Method and apparatus for continuous readout of Fabry-Perot fiber optic sensor 有权连续读出法布里 - 珀罗光纤传感器的方法和装置公开(公告)号：US07492463B2
公开(公告)日：2009-02-17
申请号：US11105651
申请日：2005-04-14
CPC分类号： G01B9/02023 , G01B9/02004 , G01B2290/25 , G01D5/268 , G01D5/35303 , G01L9/0079
摘要： A pressure measurement system and method are described. The system uses a tunable laser and a Fabry-Perot sensor with integrated transducer. A detector senses the light modulated by the Fabry-Perot sensor. A signal conditioner, which can be located up to 15 km away, then uses the detector signal to determine the displacement of the diaphragm, which is indicative of pressure exerted against the diaphragm. Use of a temperature sensor to generate a signal, fed to the signal conditioner, to compensate for temperature is also contemplated.
摘要翻译： 描述了压力测量系统和方法。 该系统使用可调谐激光器和带有集成传感器的法布里 - 珀罗传感器。 检测器感测法布里 - 珀罗传感器调制的光。 可以位于距离15公里的信号调节器，然后使用检测器信号来确定隔膜的位移，其指示施加在隔膜上的压力。 还考虑使用温度传感器来产生馈送到信号调节器以补偿温度的信号。
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公开(公告)号：US07355726B2
公开(公告)日：2008-04-08
申请号：US11105671
申请日：2005-04-14
申请人： Larry A. Jeffers , John W. Berthold
发明人： Larry A. Jeffers , John W. Berthold
IPC分类号： G01B11/14
CPC分类号： G01D5/268
摘要： Linear variable reflector sensors can be used to measure the displacement of objects. These sensors are useful in that they can be very small, do not conduct electricity, and are resistant to electrical interference from EMI/EMP and lightning strikes. The present linear variable reflector system comprises a light source, a light transmitting member in optical communication with the light source, a sensor in optical communication with the light transmitting member. The sensor comprises a moveable transparent body, a reflective material deposited on the transparent body, and at least one film deposited over said reflective material, wherein said reflective material reflects light. Further, the linear variable reflector system comprises a detector coupled to the sensor to detect displacement of the moveable transparent body.
摘要翻译： 线性可变反射器传感器可用于测量物体的位移。 这些传感器是有用的，因为它们可以非常小，不导电，并且能抵抗EMI / EMP的电气干扰和雷击。 本线性可变反射器系统包括光源，与光源光学连通的光传输部件，与光传输部件光学连通的传感器。 传感器包括可移动的透明体，沉积在透明体上的反射材料和沉积在所述反射材料上的至少一个膜，其中所述反射材料反射光。 此外，线性可变反射器系统包括耦合到传感器以检测可移动透明体的位移的检测器。
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4.发明授权Interferometric signal conditioner for measurement of absolute static displacements and dynamic displacements of a Fabry-Perot interferometer 有权用于测量法布里 - 珀罗干涉仪的绝对静态位移和动态位移的干涉信号调理器公开(公告)号：US07305158B2
公开(公告)日：2007-12-04
申请号：US11048521
申请日：2005-02-01
CPC分类号： G01B9/02007 , G01B9/02027 , G01B9/02057 , G01B9/0209 , G01B2290/25 , G01B2290/45
摘要： A signal conditioner to measure the length of an interferometric gap in a Fabry-Perot sensor (interferometer). The invention includes a light source, a Fabry-Perot interferometer capable of spanning a range of gaps in response to physical changes in the environment, a second interferometer that is placed in series with the Fabry-Perot interferometer which does not filter any particular wavelengths of light but acts as an optical cross-correlator, a detector for converting the correlated light signal into electronic signals, and an electronic processor which controls system elements and generates a signal indicative of the length of the gap spanned by the Fabry-Perot sensor.
摘要翻译： 用于测量法布里 - 珀罗传感器（干涉仪）中干涉间隙长度的信号调节器。 本发明包括光源，法布里 - 珀罗干涉仪，其能够响应于环境中的物理变化而跨越一定范围的间隙;第二干涉仪与法布里 - 珀罗干涉仪串联放置，该干涉仪不过滤任何特定波长的 光，但用作光学互相关器，用于将相关光信号转换为电子信号的检测器，以及控制系统元件并产生指示由法布里 - 珀罗传感器跨越的间隙的长度的信号的电子处理器。
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公开(公告)号：US6033108A
公开(公告)日：2000-03-07
申请号：US355926
申请日：1994-12-14
申请人： John W. Berthold , Larry A. Jeffers
发明人： John W. Berthold , Larry A. Jeffers
CPC分类号： G01K11/3206
摘要： An apparatus and method for sensing temperature within a broad temperature range, includes a fiber optic having an etalon at one end for reflecting light supplied at an opposite end by a pair of light sources operating at different wavelengths. The light sources are either applied to the optical fiber at different times for discriminating between the wavelengths and producing a temperature signal based on the two wavelengths, or the light is simultaneously applied to the optical fiber from both sources and thereafter divided into its component wavelengths before reflected and reference light detectors detect light signals at the different wavelengths. Known etalon/optical fiber based temperature sensors having a usual maximum temperature range of 500.degree. C. are thus modified to increase their range to as much as double this range.
摘要翻译： 一种用于在宽温度范围内感测温度的装置和方法，包括在一端具有标准具的光纤，用于反射在另一端由在不同波长下工作的一对光源提供的光。 在不同时间将光源施加到光纤上以区分波长并基于两个波长产生温度信号，或者光从两个源同时施加到光纤，然后在其之间分为其分量波长 反射和参考光检测器检测不同波长的光信号。 因此，修改了具有500℃的通常最大温度范围的已知的标准具/基于光纤的温度传感器，以将它们的范围增加到该范围的两倍。
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公开(公告)号：US5832157A
公开(公告)日：1998-11-03
申请号：US680339
申请日：1996-07-12
申请人： John W. Berthold , Garry W. Roman
发明人： John W. Berthold , Garry W. Roman
CPC分类号： G01H9/006 , G02B6/262 , G02B6/29359
摘要： A fiber optic acoustic emission (FOAE) sensor particularly suitable for vibration sensing in a hostile environment has a pair of optical fibers each having an end face. In one embodiment, a hollow tube or core having opposite open ends receives the end faces of the optical fibers. Means are provided for fixing the optical fibers in the hollow core with the end faces facing each other and spaced by a distance from each other in the core. A signal processing unit is connected to the optical fibers for supplying light to, and for receiving light from, the optical fibers and for measuring variations in optical phase which result in changes in the light intensity due to vibrations of the hollow core. The hollow core is fixed in a resonant cylinder, and the resonant cylinder is fixed in a housing to complete the sensor. Other embodiments dispense with the need for the hollow tube or core and employ means for fixing the optical fibers within a precision hole, advantageously produced by electrical discharge machining (EDM) or similar processes, provided in the resonant cylinder. A system employing these embodiments of the FOAE sensor is also disclosed.
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公开(公告)号：US5226730A
公开(公告)日：1993-07-13
申请号：US889217
申请日：1992-05-27
申请人： John W. Berthold
发明人： John W. Berthold
摘要： A method and apparatus for measuring the internal temperature of a work piece comprises an excitation laser for generating laser pulses which are directed through a water cooled probe, and in an optical fiber, to a first surface of the work piece. The laser is of sufficient intensity to ablate the surface of the work piece, producing a displacement and a resulting ultrasonic pulse which propagates within the thickness of the work piece to an opposite surface. The ultrasonic pulse is reflected from the opposite surface and returns to the first surface to create a second displacement. A second continuous laser also shines its light through an optical fiber in the probe into the first surface and is used in conjunction with signal processing equipment to measure the time between the first and second displacements. This time is proportional to the time-of-flight of the ultrasonic pulse in the work piece which, with a known or detected thickness of the work piece, can be used to calculate the internal temperature of the work piece.
摘要翻译： 用于测量工件的内部温度的方法和装置包括激发激光器，用于产生通过水冷探针引导的激光脉冲，并且在光纤中产生到工件的第一表面。 激光器具有足够的强度来烧蚀工件的表面，产生位移，并产生在工件的厚度内传播到相对表面的超声波脉冲。 超声脉冲从相对表面反射并返回到第一表面以产生第二位移。 第二连续激光器还将其光通过探针中的光纤照射到第一表面中，并与信号处理设备结合使用以测量第一和第二位移之间的时间。 这一次与工件中的超声波脉冲的飞行时间成正比，该工件可以使用已知或检测到的工件厚度来计算工件的内部温度。
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公开(公告)号：US5220172A
公开(公告)日：1993-06-15
申请号：US763837
申请日：1991-09-23
CPC分类号： G01N21/6408 , G01N21/645 , G01N2021/6432 , G01N21/85 , G01N2201/084
摘要： A method and appartus for measuring lignin concentration in an undiluted sample of wood pulp or black liquor comprises a light emitting arrangement for emitting an excitation light through optical fiber bundles into a probe which has a sensing end facing the sample. The excitation light causes the lignin concentration to produce fluorescent emission light which is then conveyed through the probe to analyzing equipment which measures the intensity of the emission light. Measures are taken to maximize the emission light intensity which is due to lignin concentration and distinguish it from background and interfering light. The fluorescent light intensity is found to drop off in a predictable manner with increased lignin concentration.
摘要翻译： 用于测量未经稀释的木浆或黑液样品中的木质素浓度的方法和装置包括用于通过光纤束将激发光发射到具有面向样品的感测端的探针的发光装置。 激发光使木质素浓度产生荧光发射光，然后将荧光发射光通过探针传送到测量发射光强度的分析设备。 采取措施来最大化由木质素浓度引起的发射光强度，并将其与背景和干扰光区分开来。 发现荧光强度随着木质素浓度增加而以可预测的方式下降。
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公开(公告)号：US4976157A
公开(公告)日：1990-12-11
申请号：US433493
申请日：1989-11-08
IPC分类号： G01F1/28
CPC分类号： G01F1/28
摘要： A fiber optic flow sensor situated transversely in a conduit wherein two fiber optic cables are enclosed with a holding mechanism or tube. The fiber optic cables are axially aligned but separated by a gap. Fluid flow in the conduit produces a deflection in the tube and attenuation of light transmitted from one fiber to the other which is proportional to the flow rate.
摘要翻译： 横向位于导管中的光纤流量传感器，其中两个光纤电缆用保持机构或管封闭。 光纤电缆轴向对齐，但间隔开。 导管中的流体流动导致管中的偏转和从一个纤维传递到另一个的光的衰减，其与流速成比例。
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10.发明授权Fiber optic sensor system having circulators, Bragg gratings and couplers 有权具有循环器，布拉格光栅和耦合器的光纤传感器系统公开(公告)号：US07864329B2
公开(公告)日：2011-01-04
申请号：US11314714
申请日：2005-12-21
申请人： John W. Berthold
发明人： John W. Berthold
IPC分类号： G01B9/02
CPC分类号： G01D5/35303 , G01D5/35383 , G01H9/004 , G01P15/093 , G01P15/18
摘要： A method and apparatus for detecting seismic vibrations using a series of MEMS units, with each MEMS unit including an interferometer is described. The interferometers on the MEMS units receive and modulate light from two differing wavelengths by way of a multiplexing scheme involving the use of Bragg gratings and light circulators, and an optoelectronic processor receives and processes the modulated light to discern vibrational movement of the system, which in turn allows for monitoring and calculation of a specified environmental parameter, such as seismic activity, temperature or pressure.
摘要翻译： 描述了使用一系列MEMS单元检测地震振动的方法和装置，其中每个MEMS单元包括干涉仪。 MEMS单元上的干涉仪通过涉及使用布拉格光栅和光循环器的复用方案接收和调制来自两个不同波长的光，并且光电子处理器接收并处理调制光以识别系统的振动运动， 转动允许监测和计算指定的环境参数，如地震活动，温度或压力。
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