Title:
HIGH WATER PRESSURE RESISTANT TUBULAR OPTICAL FIBER ACOUSTIC SENSOR
Document Type and Number:
Japanese Patent JP2818931
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a high water pressure sensor tubular optical fiber acoustic sensor by employing a pressure balance structure.
SOLUTION: Inner and outer tubular bodies 1, 2 are combined concentrically to produce a double tube structure and a gap part 6, defined by the inner and outer tubular bodies 1, 2, is closed by covers 3 at the opposite ends thereof. Furthermore, optical fibers 5, 5a are wound along the side face of each tubular body and an orifice is made in one cover 3 in order to equalize the hydrostatic pressure in the gap and at the outer circumferential part thereof.
Inventors:
Hishinuma Eiji
Nobuyuki Yoshitake
Shingo Yugo
Ryozawa Sato
Koji Tsuchihashi
Hiroshi Kamata
Nobuyuki Yoshitake
Shingo Yugo
Ryozawa Sato
Koji Tsuchihashi
Hiroshi Kamata
Application Number:
JP33854695A
Publication Date:
October 30, 1998
Filing Date:
December 26, 1995
Export Citation:
Assignee:
Director General, Technical Research Division, Defense Agency
Oki Electric Industry Co., Ltd.
Oki Electric Industry Co., Ltd.
International Classes:
G01H9/00; H04R1/44; (IPC1-7): G01H9/00; H04R1/44
Domestic Patent References:
| JP6339193A | ||||
| JP6109529A | ||||
| JP35875Y2 |
Attorney, Agent or Firm:
Muneharu Sasaki (3 outside)