公开(公告)号：GB2147412A

公开(公告)日：1985-05-09

申请号：GB8422229

申请日：1984-09-03

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MELTZ GERALD ,  ALLEN LOUIS BENTON ,  FERRAR CARL MCALVAY

IPC: G01L11/00 ,  G01L1/24 ,  G01L9/00 ,  G01L11/02

Abstract: An integrated optical pressure transducer having a diaphragm fabricated from a low-loss glass is positioned at the location where pressure changes are to be measured. An optical waveguide loop formed on one surface of the diaphragm acts as a ring cavity in which the difference between the resonating frequencies varies with pressure but not with temperature. Light energy is coupled into the waveguide loop from an optical source through a tangentially located input waveguide. An output waveguide, also tangentially located, couples light energy from the waveguide loop to a broadband detector so that the changes in frequency spectrum of the resonating frequencies within the waveguide loop can be monitored.

公开(公告)号：DK461784D0

公开(公告)日：1984-09-27

申请号：DK461784

申请日：1984-09-27

Applicant: UNITED TECHNOLOGIES CORP

Inventor： ALLEN JR LOUIS BENTON ,  FERRAR CARL MCALVAY ,  MELTZ GERALD

IPC: G01L11/00 ,  G01L1/24 ,  G01L9/00 ,  G01L11/02 ,  G01B

Abstract: An integrated optical pressure transducer having a diaphragm fabricated from a low-loss glass is positioned at the location where pressure changes are to be measured. An optical waveguide loop formed on one surface of the diaphragm acts as a ring cavity in which the difference between the resonating frequencies varies with pressure but not with temperature. Light energy is coupled into the waveguide loop from an optical source through a tangentially located input waveguide. An output waveguide, also tangentially located, couples light energy from the waveguide loop to a broadband detector so that the changes in frequency spectrum of the resonating frequencies within the waveguide loop can be monitored.

公开(公告)号：NO811426A

公开(公告)日：1981-04-28

申请号：NO811426

申请日：1981-04-28

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MELTZ GERALD ,  SNITZER ELIAS

IPC: G01B20060101 ,  G01B11/16 ,  G01L20060101 ,  G01L1/24 ,  G01B ,  G01L

公开(公告)号：DE69727169D1

公开(公告)日：2004-02-19

申请号：DE69727169

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

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.

公开(公告)号：GR3032556T3

公开(公告)日：2000-05-31

申请号：GR20000400252

申请日：2000-02-02

Applicant: UNITED TECHNOLOGIES CORP ,  FINMECCANICA SPA

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

IPC: G01B11/16 ,  G01D21/02 ,  G01K5/72 ,  G01L1/24 ,  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.

公开(公告)号：DE69604569D1

公开(公告)日：1999-11-11

申请号：DE69604569

申请日：1996-02-27

Applicant: UNITED TECHNOLOGIES CORP

Inventor： D AMATO MARY ,  BALL GARY ,  MELTZ GERALD

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

公开(公告)号：DE69602236D1

公开(公告)日：1999-06-02

申请号：DE69602236

申请日：1996-02-27

Applicant: UNITED TECHNOLOGIES CORP

Inventor： BALL GARY ,  MELTZ GERALD

IPC: G02B6/024 ,  G02B6/02 ,  G02B6/126 ,  H01S3/06 ,  H01S3/067 ,  H01S3/10 ,  G02B6/12

Abstract: A single polarization fiber and/or amplifier includes a non-polarization preserving fiber 10 having a fiber grating tap 12 which has a predetermined length and strength ( DELTA n/n) and is oriented at a predetermined angle theta and has a grating spacing D so as to couple-out of the fiber 10 a predetermined amount of one polarization 24 over a predetermined wavelength range of an input light 16 and pass the other polarization 28 as output light 26, the grating length being substantially the length of the fiber 10. Alternatively, all or a portion of the fiber 10 may be doped to form a polarization sensitive optical amplifier.

公开(公告)号：CA2204693A1

公开(公告)日：1997-11-08

申请号：CA2204693

申请日：1997-05-07

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: 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.

公开(公告)号：DE3587641D1

公开(公告)日：1993-12-02

申请号：DE3587641

申请日：1985-07-31

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MELTZ GERALD ,  GLENN WILLIAM ,  SNITZER ELIAS

IPC: G01L1/24 ,  G01B11/16 ,  G01D5/353 ,  G01K5/52 ,  G01K11/12 ,  G01J5/08 ,  G01J5/38

公开(公告)号：FR2569006B1

公开(公告)日：1989-07-13

申请号：FR8512161

申请日：1985-08-08

Applicant: UNITED TECHNOLOGIES CORP

Inventor： DUNPHY JAMES RICHARD ,  MELTZ GERALD ,  SNITZER ELIAS

IPC: G02B6/00 ,  G01B11/16 ,  G01L1/24 ,  G02B6/02 ,  G01N21/84

Abstract: An optical strain measuring arrangement including an optical waveguide comprising first and second cores fixedly mounted with respect to a mechanical structure to be monitored, and a detection system for relating the contrast in light intensity emerging from said cores to a range of wavelengths to establish an indication of strain along the range of the optical waveguide.