Title:
INTRUSION DETECTOR AND INTRUSION DETECTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2006/009078
Kind Code:
A1
Abstract:
An intrusion detector comprising an optical cable (1) having a supporting wire part (1a) and an optical core part (1b) and being laid in an area where intrusion is limited, an optical loss generating section (5) having a movable body butting against the optical core part (1b) to bend it forcibly when the optical cable (1) is displaced by the application of an external force thereto and disposed at the end part of the laying route of the optical cable (1) in order to generate an optical transmission loss at the optical core part (1b), and a section (4) for detecting the optical transmission loss, wherein the optical transmission loss detecting section (4) operates when the optical transmission loss attenuates by a predetermined amount or more to deliver a signal for actuating an intrusion detecting device.
Inventors:
NARUMI SHIGERU (JP)
YOSHIDA SUSUMU (JP)
MIKI RYUSUKE (JP)
YOSHIDA SUSUMU (JP)
MIKI RYUSUKE (JP)
Application Number:
PCT/JP2005/013064
Publication Date:
January 26, 2006
Filing Date:
July 14, 2005
Export Citation:
Assignee:
FURUKAWA ENGINEERING & CONSTRU (JP)
TEKUNOWATTSU INC (JP)
NARUMI SHIGERU (JP)
YOSHIDA SUSUMU (JP)
MIKI RYUSUKE (JP)
TEKUNOWATTSU INC (JP)
NARUMI SHIGERU (JP)
YOSHIDA SUSUMU (JP)
MIKI RYUSUKE (JP)
International Classes:
G08B13/186; (IPC1-7): G08B13/186
Foreign References:
| JPH05233969A | 1993-09-10 | |||
| JPH0855286A | 1996-02-27 | |||
| JP2000182158A | 2000-06-30 | |||
| JP2000258135A | 2000-09-22 | |||
| JPH11148980A | 1999-06-02 | |||
| JPS57142577A | 1982-09-03 |
Attorney, Agent or Firm:
Kawawa, Takaho (1-10 Mita 3-chom, Minato-ku Tokyo, JP)
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