Fiber interferometer-based area anti-intrusion method

Abstract

The invention discloses a fiber interferometer-based area anti-intrusion method, which comprises the following steps of: arranging one or more defense areas on the boundary of a protected area by a fiber interferometer according to the size of the protected area and different requirements on information accuracy of an intrusion alarm device, forming at least one complete enclosure for the protected area, and forming a complete enclosure for the protected area by connecting the plurality of defense areas in series or in parallel; making the light emitted from a light source pass through a transmission light path to reach a light path adapter, splitting beams into a plurality of paths by the light path adapter to correspond to the plurality of defense areas respectively; forming one or moredefense lines parallel to the boundary in each defense area, wherein the plurality of defense lines are separated at intervals on depth, and each defense line consists of a path of fiber interferometer; and detecting the phase difference of optical signals transmitted in two arms of the fiber interferometer in each defense area, discriminating the characteristics of suspicious disturbance events on the boundary of the protected area, judging the position of a vibration signal by the system when the signal characteristic accords with an intrusion behavior characteristic mode and alarming by the system.

Description

Technical field [0001] The invention is a regional intrusion prevention method based on an optical fiber interferometer, and relates to the technical fields of mechanical vibration measurement, impact measurement and pipeline system technology. Background technique [0002] Regional security has always been an important issue, such as military bases, airports, armouries, oil depots, oil and gas pipeline stations, and residential quarters. Effective protection of these areas is essential. [0003] At present, the main regional intrusion prevention technologies are divided into two categories: electricity-based and light-based; [0004] Electricity-based technologies mainly include high-voltage power grid technology and leaky cable technology. High-voltage power grids are set up on the borders of some important areas, which can deter intruders to a certain extent, but the high-voltage power grids have poor safety and do not have the linkage alarm function; when leaking cables that rad...

AI Technical Summary

Problems solved by technology

The current interference technology schemes are all single interferometer and single line of defense. These schemes are also susceptible to environmental influences, and some false intrusion signals caused by the environment are mistaken for intrusion and generate false alarms.

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