公开(公告)号：US20030075677A1

公开(公告)日：2003-04-24

申请号：US09797220

申请日：2001-06-11

Inventor： Maurice J. Halmos

IPC: G01J001/04 ,  G01J005/08

CPC classification number: G01H9/002 ,  G01H9/00

Abstract: A multimode remote vibration sensor. The inventive sensor (8) includes a mode locked laser transmitter (10); a receiver (30) adapted to detect signals transmitted by said laser (10) and reflected by an object (22) and a signal processor (40) for analyzing the signals and providing an indication with respect to a vibration of the object (22). The laser is particularly novel as a vibration sensor transmitter inasmuch as it includes a mode locking mechanism. The mode locking mechanism causes the laser to output energy at all modes within the gain profile in phase with one another. The result is a series of tight clean pulses which may be used for range resolved vibration and one-dimensional (high resolution ranging) applications. In a particular embodiment, the present teachings are implemented in a multifunctional laser which, in its operational mode, outputs a mode locked beam for vibration sensing. In the illustrative embodiment, the laser is an erbium or erbium, ytterbium-doped, fiber pumped laser and the mode locking mechanism is a passive quantum well absorber crystal or an active acoustic crystal mounted in the laser cavity. In any event, the return signals are received and processed to extract vibration, range-resolved vibration, one-dimensional profiling or three-dimensional imaging information. To this end, the signal processor includes a range de-multiplexer for organizing the return signals into range bins. For each range bin, the signal processor further includes means for extracting a signal representing vibration for each range bin and a signal representing intensity for each range bin.

Abstract translation: 多模远程振动传感器。 本发明的传感器（8）包括模式锁定激光发射器（10）; 接收器（30），适于检测由所述激光器（10）发送并由物体（22）反射的信号和用于分析信号并提供关于物体（22）的振动的指示的信号处理器（40） 。 激光器作为振动传感器发射器特别新颖，因为其包括模式锁定机构。 模式锁定机构使得激光器在增益分布内的所有模式下彼此相位地输出能量。 结果是一系列紧密清洁脉冲，可用于范围分辨振动和一维（高分辨率测距）应用。 在特定实施例中，本教导在多功能激光器中实现，该多功能激光器在其操作模式下输出用于振动感测的锁模光束。 在说明性实施例中，激光器是铒或铒掺镱纤维泵浦激光器，并且模式锁定机构是安装在激光腔中的无源量子阱吸收体晶体或有源声学晶体。 在任何情况下，接收和处理返回信号以提取振动，范围分辨振动，一维轮廓或三维成像信息。 为此，信号处理器包括范围解复用器，用于将返回信号组织到范围仓中。 对于每个范围仓，信号处理器还包括用于提取表示每个范围仓的振动的信号的装置和表示每个范围仓的强度的信号。

公开(公告)号：US20030071201A1

公开(公告)日：2003-04-17

申请号：US10036274

申请日：2001-12-24

Inventor： Tai-Cheng Yu ,  Yao-Hao Chang

IPC: G01J001/04 ,  G01J005/08

CPC classification number: H04B10/25073 ,  G01J1/1626

Abstract: An optical attenuator (10) includes: an optical splitter (11), a collimator (12), two detectors (51, 52), a first and second reflectors (21, 22), an attenuating element (3) and a driving device (4). The optical splitter includes a ferrule (112) and a GRIN (graded index) lens (113). The collimator is similar to the optical splitter. Input optical signals are transmitted from an input fiber (110) through the optical splitter and are then directed to the first reflector. The optical signals reflected by the first reflector pass through the attenuating element and are subsequently reflected to the collimator by the second reflector. The two detectors receive sampling signals via an input and an output sampling fibers (111, 112). The driving device can drive the attenuating element in response to the attenuation ratio coming from the two detectors.

Abstract translation: 光衰减器（10）包括：分光器（11），准直仪（12），两个检测器（51,52），第一和第二反射器（21,22），衰减元件（3）和驱动装置 （4）。 光分路器包括套圈（112）和GRIN（渐变折射率）透镜（113）。 准直器类似于光分路器。 输入光信号从输入光纤（110）通过光分路器传输，然后被引导到第一反射器。 由第一反射器反射的光信号通过衰减元件，随后通过第二反射器反射到准直器。 两个检测器通过输入和输出采样光纤（111,112）接收采样信号。 驱动装置可以响应于来自两个检测器的衰减比而驱动衰减元件。

公开(公告)号：US20020163953A1

公开(公告)日：2002-11-07

申请号：US09846290

申请日：2001-05-02

Applicant: Mesure Technology Co., Ltd.

Inventor： Chu-Yih Yu

IPC: G01J005/08 ,  G01J005/00

CPC classification number: G01J5/04 ,  G01J5/0003 ,  G01J5/0011 ,  G01J5/049 ,  G01J5/06 ,  G01J5/08 ,  G01J5/0818 ,  G01J5/0893

Abstract: A wave-guide arrangement includes a conical shell, a wave-guide mounted in the conical shell, a thermopile fastened to the wave-guide and adapted to detect radiation heart, the wave-guide having an isothermic base, a front neck perpendicularly extended from and formed integral with the center of the front side of the isothermic base, a coupling portion disposed at the center of the rear side of the isothermic base and adapted to receive the thermopile, and a center wave-guide hole axially extended through the neck, the isothermic base and the coupling portion, and adapted to guide radiation heat to the thermopile.

Abstract translation: 波导装置包括锥形壳体，安装在锥形壳体中的波导件，固定到波导管并适合于检测辐射心脏的热电堆，波导管具有等温基座，前颈部垂直地从 并且与等温基体的前侧的中心成一体，设置在等温基底的后侧中心并适合于接收热电堆的联接部分和沿颈部轴向延伸的中心波导孔， 等温基底和耦合部分，并且适于将辐射热引导到热电堆。

公开(公告)号：US20020134925A1

公开(公告)日：2002-09-26

申请号：US09817404

申请日：2001-03-26

Inventor： Aaron E. Grenlund

IPC: G01J005/08

CPC classification number: A63B60/46 ,  A63B59/50 ,  A63B71/0619 ,  A63B71/0686 ,  A63B2102/18 ,  A63B2220/40 ,  A63B2220/64 ,  A63B2220/803 ,  A63B2220/805 ,  A63B2225/50 ,  G01P15/093

Abstract: An accelerometer useful over a very wide range of gravitational forces is described. The device is based on the use of an optical fiber having a free cantilevered end subject to movement due to inertial lag. A constant output light source is located at one end of the optical fiber and a multicell photoarray is placed adjacent the free end of the fiber so that movement of the fiber due to acceleration can be readily detected. The individual cells in the array are preferably masked so that the output is a function of the lateral displacement of the fiber. This gives a linear or other voltage output curve related to the magnitude and direction of fiber movement. A multiplexing circuit repetitively samples the output of each photocell in the array. The output is preferably digitized and can provide a direct input into a computer that will convert data on acceleration to associated position, velocity and force involved.

Abstract translation: 描述了在非常宽的重力范围内有用的加速度计。 该装置基于使用具有由于惯性滞后而运动的自由悬臂端的光纤。 恒定输出光源位于光纤的一端，并且多单元光阵列被放置在与光纤的自由端相邻的位置，从而可以容易地检测出由于加速而导致的光纤的移动。 优选地，阵列中的各个单元被掩蔽，使得输出是光纤的横向位移的函数。 这给出了与光纤运动的幅度和方向有关的线性或其他电压输出曲线。 复用电路重复地对阵列中每个光电管的输出进行采样。 输出优选地被数字化，并且可以向计算机提供直接输入，该计算机将加速度上的数据转换成相关的位置，速度和力。

公开(公告)号：US20020125414A1

公开(公告)日：2002-09-12

申请号：US10096158

申请日：2002-03-11

Inventor： Hans-Joachim Dammann

IPC: G01J001/04 ,  G01J005/08

CPC classification number: G08B17/06 ,  B64D45/00 ,  B64D2045/009 ,  G01K3/005 ,  G01K11/32

Abstract: A fiber optic cable forms a temperature sensor arranged along an object or space to monitor the temperature thereof and detect overheating or fire conditions. An end of the sensor is con5 nected through an interface to a laser emitter and an optical receiver, which are further connected to a computer. The computer controls the laser emitter to emit a laser pulse into the sensor. The optical receiver receives the resulting reflection signal from the sensor, and provides a corresponding signal to the computer to be evaluated in connection with a nominal comparison signal. If any location of the sensor is subjected to an unacceptable temperature increase, the sensor's refractive characteristics are changed, to cause an additional reflection pulse in the reflection signal. By evaluating the amplitude and the return time of the additional reflection pulse, the temperature level and the location of the overheating condition are determined by the computer.

Abstract translation: 光纤电缆形成沿着物体或空间布置的温度传感器，以监测其温度并检测过热或起火情况。 通过与激光发射器和光接收器的接口连接传感器的一端，进一步连接到计算机。 计算机控制激光发射器将激光脉冲发射到传感器中。 光接收器从传感器接收所得到的反射信号，并且将相应的信号提供给计算机，以结合标称比较信号进行评估。 如果传感器的任何位置受到不可接受的温度升高，则传感器的折射特性被改变，从而在反射信号中产生附加的反射脉冲。 通过评估附加反射脉冲的振幅和返回时间，温度水平和过热状态的位置由计算机确定。

公开(公告)号：US20020064205A1

公开(公告)日：2002-05-30

申请号：US09987587

申请日：2001-11-15

Inventor： Henry Tubbs

IPC: G01J005/08

CPC classification number: G01J5/0014 ,  G01J5/0088 ,  G01J5/02 ,  G01J5/029 ,  G01J5/04 ,  G01J5/061 ,  G01J5/08 ,  G01J5/0821 ,  G01J5/0887 ,  G01J5/0893

Abstract: Use of an optical fibre for the direct receipt of heat radiation for transmission to a remote pyrometer is enabled by the provision of an apertured, contaminant free compartment in the component being heated, and aligning the heat receiving end of the optical fibre with the aperture so as to receive radiated heat from within the compartment.

Abstract translation: 使用光纤直接接收热辐射以传输到远程高温计可以通过在被加热的部件中提供有孔，无污染的隔室，并将光纤的热接收端与孔对准 以接收来自隔室内的辐射热。

公开(公告)号：US20010005393A1

公开(公告)日：2001-06-28

申请号：US09766449

申请日：2001-01-19

Inventor： Volker Schmidt ,  William Menchine ,  Hans-Jurgen Rostalski ,  Frank Wyrowski

IPC: G01J005/08 ,  G01J005/02

CPC classification number: G01J5/08 ,  G01J5/0803 ,  G01J5/0806 ,  G01J5/0809 ,  G01J5/089 ,  G01J5/0896 ,  Y10S33/21

Abstract: A device for temperature measurement uses an optical system to image the heat radiation emanating from a measurement spot on an object of measurement onto a detector. A sighting arrangement is also provided which has a diffractive optical system by which a light intensity distribution is produced which corresponds to the position and size of the measurement spot on the object of measurement.

Abstract translation: 用于温度测量的装置使用光学系统将从测量对象上的测量点发出的热辐射成像到检测器上。 还提供了具有衍射光学系统的瞄准装置，通过该衍射光学系统产生对应于测量对象上的测量点的位置和尺寸的光强度分布。

公开(公告)号：US20040256542A1

公开(公告)日：2004-12-23

申请号：US10869077

申请日：2004-06-17

Applicant: FUJI PHOTO FILM CO., LTD.

Inventor： Yoji Okazaki

IPC: G01J001/04 ,  G02B027/02 ,  G01J005/08 ,  G01J001/42

CPC classification number: G02B6/4249 ,  G02B6/4204

Abstract: An optical tweezer device for capturing minute bodies on a stage in accordance with very fine patterns. A fiber array light source of the device is equipped with a laser module which is structured with a high-luminance, high-power multiplex laser light source. High-intensity laser light which is emitted from this fiber array light source is modulated by a DMD and focused by a microlens array. The focused light enters corresponding optical fiber cores which are arranged in a matrix form at an array head, and is guided in the fibers. The light focused by the microlens array is caused to enter the fiber cores corresponding to the microlenses with high efficiency. The optical fibers are two-dimensionally arrayed to correspond with pixel portions of the DMD. High-intensity laser light is emitted from the array head in accordance with an on-off pattern of the DMD.

Abstract translation: 一种用于根据非常精细的图案在舞台上捕获微小物体的光学镊子装置。 该装置的光纤阵列光源配备有由高亮度，大功率多路复用激光光源构成的激光模块。 从该光纤阵列光源发射的高强度激光由DMD调制并由微透镜阵列聚焦。 聚焦光进入相应的光纤芯，其以矩阵形式排列在阵列头部，并在光纤中引导。 使由微透镜阵列聚焦的光以高效率进入对应于微透镜的纤芯。 二维排列的光纤与DMD的像素部分对应。 根据DMD的开 - 关模式，从阵列头发射高强度激光。

公开(公告)号：US20040099801A1

公开(公告)日：2004-05-27

申请号：US10458109

申请日：2003-06-10

Inventor： Whitten Lee Schulz ,  Eric Udd

IPC: G01J001/04 ,  G01J001/42 ,  G01J005/08

CPC classification number: G01N21/774 ,  G01M3/165 ,  G01M3/38 ,  G01N2021/7723 ,  G02B6/022

Abstract: Fiber grating environmental measurement systems are comprised of sensors that are configured to respond to changes in moisture or chemical content of the surrounding medium through the action of coatings and plates inducing strain that is measured. These sensors can also be used to monitor the interior of bonds for degradation due to aging, cracking, or chemical attack. Means to multiplex these sensors at high speed and with high sensitivity can be accomplished by using spectral filters placed to correspond to each fiber grating environmental sensor. By forming networks of spectral elements and using wavelength division multiplexing arrays of fiber grating sensors may be processed in a single fiber line allowing distributed high sensitivity, high bandwidth fiber optic grating environmental sensor systems to be realized.

Abstract translation: 光纤光栅环境测量系统由传感器组成，传感器被配置为通过涂层和板的作用来响应周围介质的湿度或化学成分的变化，诱导测量的应变。 这些传感器也可用于监测由于老化，开裂或化学侵蚀而导致的结合物内部的退化。 可以通过使用放置为对应于每个光纤光栅环境传感器的光谱滤波器来实现以高速和高灵敏度复用这些传感器的手段。 通过形成光谱元件的网络并使用光纤光栅传感器的波分复用阵列可以在单个光纤线路中进行处理，从而实现分布式高灵敏度，高带宽光纤光栅环境传感器系统。

公开(公告)号：US20040091015A1

公开(公告)日：2004-05-13

申请号：US10618100

申请日：2003-07-10

Inventor： Kenneth J. Crowe ,  Albert van der Tuuk ,  Willem Griffioen

IPC: G01J005/08

CPC classification number: G01K11/32

Abstract: A fiber optic cable is used as a distributed temperature sensing (DTS) transducer for temperature profile measurements in a protective underground duct in which a high voltage (HV) cable has already been laid. The sensing cable is not incorporated into the power cable itself, and in some installations does not have direct physical contact with the HV cable. The sensing cable is installed externally (along side) of the HV power cable, either in direct surface contact with the HV cable, or alternatively, the fiber optic sensing cable is installed in a small diameter guide tube that is placed in the upper annulus between the HV cable and the protective duct. The sensing fiber and one or more guide tubes are installed in a loose bundle at least in part by fluid drag forces (blowing with pressurized air) using conventional cable launching equipment. Large diameter guide tubes are placed on opposite sides of the HV cable in a wedging position that blocks shifting movement of the small guide tubes and optical fibers down into the lower cusp-shaped space between the HV cable and the protective duct.