公开(公告)号：CA2097048C

公开(公告)日：2001-09-11

申请号：CA2097048

申请日：1993-05-26

Applicant: LITTON SYSTEMS INC

Inventor： MAAS STEVEN J ,  MEYER A DOUGLAS

IPC: G01H9/00 ,  H04B11/00 ,  H04R1/44

Abstract: A hydrophone includes a plurality of hydrophone components separated by finite spacings and interconnected to provide a single output signal. Each hydrophone component is based upon a single-mandrel design in which a cylindrical body is apportioned into sensing and reference sections. The sensing sections comprise coaxial arrangements of pliant inner and outer cylinders separated by an annular airspace while the adjacent reference sections comprise solid-walled cylinders. Finite separation distances between the hydrophone components result in reduced flow noise occasioned by increased sensing area while detection sensitivity is maintained.

公开(公告)号：DE69309126D1

公开(公告)日：1997-04-30

申请号：DE69309126

申请日：1993-01-28

Applicant: LITTON SYSTEMS INC

Inventor： DANVER BRUCE A ,  MEYER A DOUGLAS

IPC: G01H9/00

公开(公告)号：GB2272345B

公开(公告)日：1996-07-24

申请号：GB9308890

申请日：1993-04-29

Applicant: LITTON SYSTEMS INC

Inventor： MAAS STEVEN J ,  MEYER A DOUGLAS

IPC: G01H9/00 ,  H04B11/00 ,  H04R1/44 ,  H04R23/00

Abstract: A hydrophone includes a plurality of hydrophone components separated by finite spacings and interconnected to provide a single output signal. Each hydrophone component is based upon a single-mandrel design in which a cylindrical body is apportioned into sensing and reference sections. The sensing sections comprise coaxial arrangements of pliant inner and outer cylinders separated by an annular airspace while the adjacent reference sections comprise solid-walled cylinders. Finite separation distances between the hydrophone components result in reduced flow noise occasioned by increased sensing area while detection sensitivity is maintained.

公开(公告)号：GB2278439A

公开(公告)日：1994-11-30

申请号：GB9410218

申请日：1994-05-23

Applicant: LITTON SYSTEMS INC

Inventor： MEYER A DOUGLAS ,  DANVER BRUCE ,  MOORE EMERY L

IPC: G01B9/02 ,  G01B11/16 ,  G01D5/353 ,  G01H9/00 ,  G02B6/00 ,  G02B6/02 ,  H04R1/44 ,  H04R23/00

Abstract: A plurality of elongate mandrels 35 - 41 are arranged in an planar array with their longitudinal axes parallel. A first optical fiber is wound around portions of each mandrel in a first group of the mandrels 35, 37, 39, 41 such that exposing it to a parameter to be sensed causes the length of the first optical fiber to increase and decrease in direct proportion as the parameter increases and decreases. A second optical fiber is wound around a second group of the mandrels 36, 38, 40 for exposure to the parameter. The second optical fiber preferably is arranged such that exposing it to the parameter to be sensed causes the length of the second optical fiber to increase and decrease in inverse proportion as the parameter increases and decreases. The fibres may be wound externally or internally of the mandrels which may be hollow or filled with polyurethane.

公开(公告)号：NO930291A

公开(公告)日：1993-07-29

申请号：NO930291

申请日：1993-01-28

Applicant: LITTON SYSTEMS INC

Inventor： DANVER BRUCE A ,  MEYER A DOUGLAS

IPC: G01H9/00 ,  G01H3/00 ,  H04B1/44

CPC classification number: G01H9/004

公开(公告)号：NO930279D0

公开(公告)日：1993-01-27

申请号：NO930279

申请日：1993-01-27

Applicant: LITTON SYSTEMS INC

Inventor： DANVER BRUCE A ,  MEYER A DOUGLAS

IPC: G01H9/00 ,  G01S