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    AIR PATH GAP SENSOR
    1.
    发明专利
    AIR PATH GAP SENSOR 失效

    公开(公告)号：JPH1068617A

    公开(公告)日：1998-03-10

    申请号：JP11769797

    申请日：1997-05-08

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： GRZYBOWSKI RICHARD R ,  MELTZ GERALD

    IPC: G01B15/00 ,  F01D11/02 ,  F01D11/08 ,  F01D11/12 ,  F01D21/04 ,  F02C7/00 ,  G01S13/36 ,  G01S13/88

    Abstract: PROBLEM TO BE SOLVED: To provide a high performance air path gap sensor. SOLUTION: A machine having a projecting material, a mutually movable adjacent seal 18 susceptible to abrasion, an air path gap 18 between the seal 18 and the material 26, and a material interval D2 between a sensor 10 and the material 26 is provided with the sensor 10 being arranged in the seal 18 by the recessed gap D. A gap/thickness circuit 14 delivers transmission and reflection microwave signals 30, 32 having an impedance substantially matching with the characteristic impedance of a coaxial cable 12 along the coaxial cable 12. The circuit 14 receives the reflection signal 32 and supplies an electric signal indicative of the recessed gap D and/or the an air path gap G. Alternatively, the circuit 14 supplies only the recessed gap D. The sensor 10 also determines operation of the machine through measurement.

    POLARIZED FIBER LASER SOURCE
    3.
    发明申请
    POLARIZED FIBER LASER SOURCE 审中-公开
    极化光纤激光源

    公开(公告)号：WO9627223A3

    公开(公告)日：1996-10-10

    申请号：PCT/US9602626

    申请日：1996-02-27

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： D AMATO MARY A ,  BALL GARY A ,  MELTZ GERALD

    IPC: H01S3/07 ,  H01S3/067 ,  H01S5/00 ,  H01S3/06 ,  H01S3/085

    CPC classification number: H01S3/0675 ,  H01S3/06712

    Abstract: A polarized fiber laser source includes a fiber laser (10) comprising a pair of Bragg gratings (14, 16) at opposite ends of a fiber laser cavity (18) which is doped with a rare-earth dopant so as to allow lasing to occur at a lasing wavelength μL. A grating tap (26) is provided along a portion of the laser cavity (18) to couple-out a predetermined amount of light along one polarization, e.g., the 's' polarization, at the lasing wavelength μL. This causes one polarization mode to experience more loss than the other, thereby allowing the fiber laser to lase only on the less lossy polarization mode and causing the laser output light (40) to be polarized only along such polarization.

    Microwave air-path clearance sensor
    4.
    发明公开
    Microwave air-path clearance sensor 失效
    叶梢间隙微波传感器

    公开(公告)号：EP0806680A3

    公开(公告)日：1998-07-08

    申请号：EP97107567

    申请日：1997-05-07

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： CRZYBOWSKI RICHARD R ,  MELTZ GERALD

    IPC: G01B15/00 ,  F01D11/02 ,  F01D11/08 ,  F01D11/12 ,  F01D21/04 ,  F02C7/00 ,  G01S13/36 ,  G01S13/88 ,  G01S13/08

    CPC classification number: G01B15/00 ,  F01D11/025 ,  F01D11/12 ,  F01D21/04 ,  F05D2260/80 ,  G01S13/36 ,  G01S13/88

    Abstract: A machine having protruding elements (26) and an adjacent abradable seal (18), which move relative to each other, an air-path clearance G between the seal (18) and the elements (26) and an element distance D2 between the sensor (10) and the elements (26), is provided with a sensor (10) which is recessed within the seal (18) by a recess distance D. A clearance/thickness circuit (14) provides transmitted and reflected microwave signals (30,32) along a coaxial cable (12) having a characteristic impedance, to the sensor (10), which has an impedance substantially matched to the characteristic impedance of the cable (12). The sensor (10) provides the reflected signal (32) which is indicative of the recess distance D when the elements (26) are not in front of the sensor (10) and is indicative of the blade distance D2 between the sensor (10) and the elements (26) when the elements (26) are in front of the sensor (10). The circuit (14) receives the reflected signal (32) and provides electrical signals indicative of the recess distance D and/or the air-path clearance G. Alternatively, the circuit (14) may provide only the recess distance D. The sensor (10) provides such measurements whether or not the machine is operating.

    6.
    发明专利
    未知

    公开(公告)号：DK0753130T3

    公开(公告)日：2000-04-25

    申请号：DK95913985

    申请日：1995-03-08

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： MELTZ GERALD ,  VARASI MAURO ,  VANNUCCI ANTONELLO ,  SIGNORAZZI MARIO ,  FERRARO PIETRO ,  IMPARATO SABATO INSERRA ,  VOTO CLAUDIO ,  DUNPHY JAMES R

    IPC: G01L1/24 ,  G01B11/16 ,  G01D21/02 ,  G01K5/72 ,  G01K11/12 ,  G01K11/32 ,  G01M11/08 ,  G01D5/353 ,  G01D5/26 ,  G01D5/34

    Abstract: An embedded optical sensor has a plurality of layers 10-20 and an optical fiber 21 with a fiber grating 28, disposed between the layers 14,16. The layers 10-20 comprise filaments 22 and resin 24 which have different thermal expansion coefficients and the filaments 22 are oriented so as to create unequal transverse residual stresses that act through the geometry of a resin-rich region that surrounds on the grating 28 in the fiber 21. The unequal transverse residual stresses cause birefringence in the grating 28, thereby causing the grating 28 to reflect light 32 having two wavelengths with a predetermined separation, each along a different polarization axis. The wavelength separation and average wavelength between such separation have different sensitivities to temperature and strain, thereby allowing independent temperature and strain measurements using only a single grating. The birefringence is maximized when the filaments 22 of the adjacent layers 10,12 are oriented at 90 degrees with respect to the longitudinal (Z-axis) of the fiber 21.

    7.
    发明专利
    未知

    公开(公告)号：DE69513281T2

    公开(公告)日：2000-02-17

    申请号：DE69513281

    申请日：1995-03-08

    Applicant: UNITED TECHNOLOGIES CORP ,  FINMECCANICA SPA

    Inventor： MELTZ GERALD ,  VARASI MAURO ,  VANNUCCI ANTONELLO ,  SIGNORAZZI MARIO ,  FERRARO PIETRO ,  IMPARATO SABATO ,  VOTO CLAUDIO ,  DUNPHY JAMES

    IPC: G01L1/24 ,  G01B11/16 ,  G01D21/02 ,  G01K5/72 ,  G01K11/12 ,  G01K11/32 ,  G01M11/08 ,  G01D5/353 ,  G01D5/34 ,  G01D5/26

    Abstract: An embedded optical sensor has a plurality of layers 10-20 and an optical fiber 21 with a fiber grating 28, disposed between the layers 14,16. The layers 10-20 comprise filaments 22 and resin 24 which have different thermal expansion coefficients and the filaments 22 are oriented so as to create unequal transverse residual stresses that act through the geometry of a resin-rich region that surrounds on the grating 28 in the fiber 21. The unequal transverse residual stresses cause birefringence in the grating 28, thereby causing the grating 28 to reflect light 32 having two wavelengths with a predetermined separation, each along a different polarization axis. The wavelength separation and average wavelength between such separation have different sensitivities to temperature and strain, thereby allowing independent temperature and strain measurements using only a single grating. The birefringence is maximized when the filaments 22 of the adjacent layers 10,12 are oriented at 90 degrees with respect to the longitudinal (Z-axis) of the fiber 21.

    10.
    发明专利
    未知

    公开(公告)号：DE69031707D1

    公开(公告)日：1997-12-18

    申请号：DE69031707

    申请日：1990-12-21

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： MELTZ GERALD ,  MOREY WILLIAM WAYNE ,  WILSON ARNOLD LEROY

    IPC: G02B5/18 ,  G02B6/02 ,  G02B6/122 ,  G02B6/34 ,  G02B6/12 ,  G02B6/16

    Abstract: An optical waveguide light redirecting arrangement includes an optical waveguide having a solid portion that guides light in a first path along a longitudinal axis, with at least one grating region being embedded in the solid portion at a location remote from its end portions. The grating region includes a multitude of grating elements extending at such longitudinal spacings and at such oblique angles relative to the longitudinal axis to redirect light reaching the grating elements between the first path and at least one second path extending externally of the waveguide and diverging between a focus situated at a predetermined distance from the waveguide and the grating region. When light is directed in one of the first and second paths toward the grating region, it is redirected by the grating elements into the respectively other of the second and first paths with attendant in-phase combination in the other path of light having a wavelength within a range around a central wavelength. The grating elements are formed in the waveguide by exposing the waveguide to an interference pattern of two ultraviolet radiation beams that are symmetrical with respect to a plane extending at the oblique angle relative to the waveguide axis at the center of the grating region.

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