公开(公告)号：EP1576342A2

公开(公告)日：2005-09-21

申请号：EP03781945.5

申请日：2003-11-12

申请人： CiDra Corporation

发明人： FERNALD, Mark, R. ,  DAVIS, Michael, A. ,  KERSEY, Alan, D. ,  GYSLING, Daniel, L. ,  BAILEY, Timothy, J.

IPC分类号： G01F1/74 ,  G01F1/708 ,  G01F1/712 ,  G01F1/66

CPC分类号： G01F1/668 ,  G01F1/666 ,  G01F1/7082 ,  G01F1/712 ,  G01F1/74

摘要： A apparatus (10, 110, 170) is provided that measures the speed of sound and/or vortical disturbances propagating in a single phase fluid flow and/or multiphase mixture to determine parameters, such as mixture quality, particle size, vapor/mass ratio, liquid/vapor ratio, mass flow rate, enthalpy and volumetric flow rate of the flow in a pipe, by measuring acoustic and/or dynamic pressures. The apparatus includes a spatial array of unsteady pressure sensors (15-18) placed at predetermined axial locations x1 - xN disposed axially along the pipe (14). The pressure sensors (15-18) provide acoustic pressure signals P1(t) - PN(t) to a signal processing unit (30) which determines the speed of sound amix propagating through of the process flow (12) flowing in the pipe (14). The pressure sensors are piezoelectric film sensors that are clamped onto the outer surface of the pipe at the respective axial location.

公开(公告)号：EP1386192A2

公开(公告)日：2004-02-04

申请号：EP02728662.4

申请日：2002-04-03

申请人： CiDra Corporation

发明人： MOON, John ,  KERSEY, Alan, D. ,  SIRKIS, James, S. ,  DUNPHY, James ,  PINTO, Joseph ,  SZCZPPANEK, Paul ,  DAVIS, Michael

IPC分类号： G02B27/10 ,  G02B26/08 ,  H04J14/02 ,  G02B6/34 ,  H04Q11/00 ,  G02B6/42

CPC分类号： G02B6/4246 ,  G02B6/262 ,  G02B6/266 ,  G02B6/2713 ,  G02B6/272 ,  G02B6/278 ,  G02B6/2793 ,  G02B6/2931 ,  G02B6/29311 ,  G02B6/29313 ,  G02B6/29314 ,  G02B6/29395 ,  G02B6/29398 ,  G02B6/3516 ,  G02B6/356 ,  G02B6/3588 ,  G02B6/359 ,  G02B6/4226 ,  G02B26/0833 ,  G02B26/0841 ,  G02B27/1006 ,  G02B27/1073 ,  G02B27/108 ,  G02B27/1086 ,  G02B27/126 ,  G02B27/144 ,  G02B27/147 ,  H04J14/021 ,  H04J14/0213 ,  H04J14/0221 ,  H04Q2011/0009 ,  H04Q2011/0026

摘要： An dynamic optical filter 10 is provided to selectively attenuate or filter a wavelength band(s) of light (i.e., optical channel(s)) or a group(s) of wavelength bands of an optical WDM input signal 12. The optical filter is controllable or programmable to selectively provide a desired filter function. The optical filter 10 includes a spatial light modulator 36, which comprises an array of micromirrors 52 effectively forms a two-dimensional diffraction grating mounted in a retro-reflecting configuration. Each optical channel 14 is dispersed separately or overlappingly onto the array of micro-mirrors 52 along a spectral axis or direction 55 such that each optical channel or group of optical channels are spread over a plurality of micro-mirrors to effectively pixelate each of the optical channels or input signal. Each channel 14 or group of channels may be selectively attenuated by flipping or tilting a selected number of micro-mirrors to thereby deflect a portion of the incident radiation away from the return optical path. The micro-mirrors operate in a digital manner by flipping between a first and second position in response to a control signal 56 provided by a controller 58 in accordance with an attenuation algorithm and an input command 60. The switching algorithm may provide a bit (or pixel) map or look-up table indicative of the state of each of the micro-mirrors 52 of the array to selectively attenuate the input signal and provide a modified output signal 38 at optical fiber 40.

公开(公告)号：EP1261888A2

公开(公告)日：2002-12-04

申请号：EP01937156.6

申请日：2001-03-06

申请人： CiDRA Corporation

发明人： BAILEY, Timothy ,  FERNALD, Mark, R. ,  KERSEY, Alan, D. ,  MACDOUGALL, Trevor ,  PUTNAM, Martin, A. ,  SANDERS, Paul, E.

IPC分类号： G02B6/16 ,  H04J14/02

CPC分类号： G02B6/2932 ,  G02B6/022 ,  G02B6/29322 ,  G02B6/29383 ,  G02B6/29395 ,  G02B6/29398 ,  H04J14/021

摘要： A compression-tuned fiber Bragg grating based reconfigurable wavelength add/drop module has a compression force assembly and an all-glass Bragg grating compression unit having gratings spaced along an axis of compression. The compression force assembly responds to a control electronics signal containing information about a selected wavelength of a channel to be added to or dropped from an optical traffic signal, for providing a compression force applied along the axis of compression. The compression unit responds to the optical traffic signal and the compression force, for providing an all-glass Bragg grating compression unit optical signal having the selected wavelength of the channel to be added to or dropped from the optical traffic signal. The compression unit optical signal may include either the traffic with an added reflected channel(s), or a dropped reflected channel(s). The compression unit is a 'dogbone' structure having either a glass tube with an optical fiber fused therein, or a single large diameter waveguide having a core. The core of the optical fiber or waveguide has the gratings spaced therein. The axis of compression is parallel with the longitudinal axis of the dogbone structure.

公开(公告)号：EP1234161A2

公开(公告)日：2002-08-28

申请号：EP00992345.9

申请日：2000-11-28

申请人： CiDra Corporation

发明人： KERSEY, Alan, D.

IPC分类号： G01D5/353

CPC分类号： G01L1/246 ,  G01D5/35316

摘要： A fiber Bragg grating sensor system for sensing a parameter, including temperature or strain comprises a structured sensor fiber Bragg grating in combination with a broadband light source, coupler, readout grating mixing and spectral analysis system. The structured sensor fiber Bragg grating combination responds to an optical signal, and further responds to a sensed parameter, for providing a structured sensor fiber Bragg grating signal containing information about the sensed parameter. The broadband light source, coupler, readout grating mixing and spectral analysis system provides the optical signal, and responds to the structured sensor fiber Bragg grating signal, mixes the structured sensor fiber Bragg grating with a reference grating spectrum, for providing a broadband source, coupler, readout grating mixing and spectral analysis system signal containing information about a mixed and spectrally analyzed structured sensor fiber Bragg grating signal that is used to determine the sensed parameter. The structured sensor fiber Bragg grating signal may be reflected off a structured readout fiber Bragg grating, and a combined structured sensor and readout fiber Bragg grating signal is spectrally analyzed. The structured sensor fiber Bragg grating signal may also be analyzed with an optical spectrum analyzer, then electronically mixed and multiplied with a simulated reference grating spectrum in a spectrum weighting device.

公开(公告)号：EP1144969B1

公开(公告)日：2010-09-08

申请号：EP99972434.7

申请日：1999-12-06

申请人： CiDra Corporation

发明人： WRIGHT, Christopher, J. ,  BAILEY, Timothy, J. ,  FERNALD, Mark, R. ,  SULLIVAN, James, M. ,  DAVIS, Michael, A. ,  DUNPHY, James, R. ,  KERSEY, Alan, D. ,  PUTNAM, Martin, A. ,  BRUCATO, Robert, N. ,  SANDERS, Paul, E.

IPC分类号： G01K11/32

CPC分类号： G01K11/32

公开(公告)号：EP1673614A1

公开(公告)日：2006-06-28

申请号：EP04785292.6

申请日：2004-10-01

申请人： CiDra Corporation

发明人： MOON, John, A. ,  FOURNIER, David, R. ,  PUTNAM, Martin, A. ,  KERSEY, Alan, D. ,  LI, Tuo

IPC分类号： G01N21/64 ,  G06K19/06 ,  G06K7/10

CPC分类号： G06K19/06009 ,  B01J2219/00466 ,  B01J2219/005 ,  B01J2219/00551 ,  B01J2219/0056 ,  B01J2219/00576 ,  B01J2219/00702 ,  B01L3/502715 ,  B01L2200/0668 ,  B01L2300/0636 ,  B01L2300/0877 ,  G01N21/4788 ,  G01N21/6428 ,  G01N21/645 ,  G06F3/0321 ,  G06K1/12 ,  G06K7/12 ,  G06K2019/06234

摘要： An optical reader system 7 for diffraction grating-based encoded microbeads (or bead reader system), comprises a reader box 100, which accepts a bead cell (or cuvette) 102 that holds the microbeads 8, having an embedded code therein. The reader box 100 interfaces along lines 103 with a known computer system 104. The reader box 100 interfaces with a stage position controller 112 and the controller 112 interfaces along a line 115 with the computer system 104 and a manual control device (or joy stick) 116 along a line 117. The reader interrogates the microbeads to determine the embedded code and/or the fluorescence level on the beads. The reader provides information similar to a bead flow cytometer but in a planar format, i.e., a virtual cytometer.

公开(公告)号：EP1585944A2

公开(公告)日：2005-10-19

申请号：EP04701857.7

申请日：2004-01-13

申请人： CiDra Corporation

发明人： KERSEY, Alan, D. ,  GYSLING, Daniel, L.

IPC分类号： G01F1/66 ,  G01F1/74 ,  G01F1/704 ,  G01F1/708 ,  G01F1/712

CPC分类号： G01F1/662 ,  G01F1/666 ,  G01F1/667 ,  G01F1/7082 ,  G01F1/712 ,  G01F1/74 ,  G01N29/024 ,  G01N29/032 ,  G01N29/222 ,  G01N29/348 ,  G01N2291/011 ,  G01N2291/02408 ,  G01N2291/02416 ,  G01N2291/02425 ,  G01N2291/02836 ,  G01N2291/102 ,  G01N2291/106 ,  G01P5/245

摘要： An apparatus and method for measuring the flow velocity of a fluid flowing through a pipe that includes an array of at least two ultrasonic sensor units (with as many as 16 sensor units) disposed at predetermined locations along the pipe. Each sensor unit includes an ultrasonic transmitter and an ultrasonic receiver. Each sensor unit provides a respective signal indicative of a parameter of the transit time or amplitude of the ultrasonic signal propagating between each respective ultrasonic transmitter and ultrasonic receiver. A signal processor defines a convective ridge in the k-ω plane in response to the ultrasonic signals using an adaptive beamforming algorithm, such as Capon and Music. The signal processor further determines the slope of at least a portion of the convective ridge to determine the flow velocity of the fluid.

公开(公告)号：EP1386193A2

公开(公告)日：2004-02-04

申请号：EP02763940.0

申请日：2002-04-03

申请人： CiDra Corporation

发明人： DAVIS, Michael ,  KERSEY, Alan, D. ,  MOON, John ,  DUNPHY, James ,  SIRKIS, James ,  PINTO, Joseph ,  SZCZEPANEK, Paul

IPC分类号： G02B27/10 ,  G02B26/08 ,  H04J14/02 ,  G02B6/34 ,  H04Q11/00 ,  G02B6/42

CPC分类号： G02B6/2931 ,  G02B6/278 ,  G02B6/29311 ,  G02B6/29313 ,  G02B6/29314 ,  G02B6/29394 ,  G02B6/29395 ,  G02B6/29398 ,  G02B6/3516 ,  G02B6/356 ,  G02B6/3588 ,  G02B6/359 ,  G02B26/0841 ,  G02B27/1006 ,  G02B27/1073 ,  G02B27/1086 ,  H04J14/021 ,  H04J14/0213 ,  H04J14/0221 ,  H04Q2011/0009 ,  H04Q2011/0018 ,  H04Q2011/0026

摘要： A variable optical source (801) to selectively provide a desired optical output signal in response to a control signal is provided. The optical source includes an optical filter that attenuates a broadband optical input signal or a multi-spectral input signal (802). The optical filter is controllable or programmable to selectively provide a desired filter function. The optical filter (10) includes a spatial light modulator (36), which may comprise an array of micromirrors (52) that effectively forms a two-dimensional diffraction grating mounted in a retro-reflecting configuration. The input optical signal is dispersed onto the array of micromirrors (52) along a spectral axis or direction (55) such that input light is spread over a plurality of micromirrors to effectively pixelate the light. The broadband light or signals of the multi-spectral input light is selectively attenuated by flipping or tilting a selected number of micromirrors to thereby deflect a portion of the incident radiation away from the return optical path. The micro-mirrors operate in a digital manner by flipping between a first and second position in response to a control signal (56) provided by a controller (58) in accordance with an attenuation algorithm and an input command (60).

公开(公告)号：EP1145059A2

公开(公告)日：2001-10-17

申请号：EP99972433.9

申请日：1999-12-06

申请人： CiDra Corporation

发明人： FERNALD, Mark, R. ,  BAILEY, Timothy, J. ,  MILLER, Matthew, B. ,  SULLIVAN, James, M. ,  DAVIS, Michael, A. ,  OGLE, Peter ,  KERSEY, Alan, D. ,  PUTNAM, Martin, A. ,  BRUCATO, Robert, N. ,  SANDERS, Paul, E.

IPC分类号： G02B6/293 ,  G02B6/16

CPC分类号： G02B6/022 ,  G02B6/0218

摘要： A tube-encased fiber grating includes an optical fiber (10) having at least one Bragg grating (12) impressed therein which is embedded within a glass capillary tube (20). Light (14) is incident on the grating (12) and light (16) is reflected at a reflection wavelength μ1. The shape of the tube (20) may be other geometries (e.g., a 'dogbone' shape) and/or more than one concentric tube may be used or more than one grating or pair of gratings may be used. The fiber (10) may be doped at least between a pair of gratings (150, 152), encased in the tube (20) to form a tube-encased compression-tuned fiber laser or the grating (12) or gratings (150, 152) may be constructed as a tunable DFB fiber laser encased in the tube (20). Also, the tube (20) may have an inner region (22) which is tapered away from the fiber (10) to provide strain relief for the fiber (10), or the tube (20) may have tapered (or fluted) sections (27) which have an outer geometry that decreases down to the fiber (10) and provides added fiber pull strength. Also, the tube encased grating (12) exhibits lower mode coupling from the fiber core to the cladding modes due to the increased diameter of the cladding where the tube (20) is fused to the fiber (10) where the grating is located (12).

公开(公告)号：EP0954743A1

公开(公告)日：1999-11-10

申请号：EP98902822.0

申请日：1998-01-20

申请人： Cidra Corporation ,  THE UNITED STATES OF AMERICA as represented by THE SECRETARY OF THE NAVY

发明人： MARON, Robert, J. ,  KERSEY, Alan, D.

IPC分类号： G01D5 ,  G01K5 ,  G01P15

CPC分类号： G01L11/02 ,  G01D5/35383 ,  G01K5/52 ,  G01P15/093

摘要： A sensor capable of measuring a number of physical parameters in a harsh environment includes a plurality of intrinsic fiber optic sensor elements formed within a core of an optical fiber, the optical fiber being disposed within a capillary tube made of a high strength, corrosion resistant material. The sensor is located at a distal end of the capillary tube, and the capillary tube is mounted in a monitoring location, such as mounted to the casing of an electrically submersible pump (ESP), such that the sensor can be utilized to measure physical parameters, including static and dynamic pressure, temperature, acceleration and acoustic signals, at the monitoring location. Each sensor is constructed such that a reference element, such as a rigid element, isolates a reference location in the optical fiber from mechanically induced strain. A Bragg grating sensing element is positioned with respect to the reference element, and responsive to an optical signal and to a strain associated with a respective measurand field for providing an optical sensing signal related to a magnitude of the respective measurand field.