INTRUSION DETECTOR AND INTRUSION DETECTION SYSTEM

摘要

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.