Optical fiber interferometer arrangement method of region anti-intrusion system based on optical fiber interferometer

Abstract

The present invention provides an optical fiber interferometer arrangement method of a region anti-intrusion system based on an optical fiber interferometer, wherein one or more defense regions are arranged at the boundary of a protection region of the optical fiber interferometer according to the size of the protection region and a requirement of information precision of an intrusion alarming position, and at least one integrated cycle is formed for the protection region; the plurality of defense regions which are connected in series or parallel form one integrated cycle for the protection region; the light of a light source is transmitted to a light path adapter via a transmission light path, then divided into a plurality of paths corresponding to the defense regions by the light path adapter; one or more defense lines parallel to the boundary are arranged in each of the defense regions, and the plurality of defense lines are arranged at intervals in a longitudinal direction, and each defense line is composed of one path of optical fiber interferometer; the phase difference of the light signal transmitted in two arms of the optical fiber interferometers of each defense region is detected so as to distinguish the characteristic of the doubtful interference events in the boundary of the protection region; when the signal characteristic satisfies the intrusion characteristic mode, the system determines the position of the vibration signal and alarms.

Description

technical field [0001] The invention relates to an optical fiber interferometer-based laying method for an optical fiber interferometer in an area anti-invasion system, and relates to the technical fields of mechanical vibration measurement, impact measurement and pipeline systems. Background technique [0002] Regional security has always been an important issue, such as military bases, airports, armories, oil depots, oil and gas pipeline stations and residential quarters, etc., and the effective protection of these areas is crucial. [0003] At present, the main area intrusion prevention technologies are based on electricity and light. [0004] Electricity-based technologies mainly include high-voltage grid technology and leaky cable technology. The high-voltage power grid is set up on the border of some important areas, which can deter intruders to a certain extent, but the high-voltage power grid has poor security and does not have a linkage alarm function; when using l...

AI Technical Summary

Problems solved by technology

The fiber optic interferometers in the current interference technology solutions are all single interferometers and a single line of defense. These solutions are also susceptible to environmental influences, and some false intrusion signals caused by the environment are mistaken for intrusions to generate false alarms.

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