Distributed optical fiber fence vibration invasion identifying system

Abstract

The invention discloses a distributed optical fiber vibration invasion identifying system comprising a distributed optical fiber vibration sensing system used for identifying fence invasion optical fiber vibration signals, an abnormal vibration block interception module used for subjecting the collected optical fiber vibration signals to framing operation and calculating a zero-crossing rate of framed optical fiber vibration signals, a feature extraction module used for providing feature parameters for an artificial network mode identification method, and an artificial nerve network module used for accurately identifying vibration data of unknown invasion events by training feature parameters of known invasion events. The abnormal vibration block interception module is used for intercepting abnormal vibration blocks. According to the distributed optical fiber fence vibration invasion identifying system, a two stage invasion behavior identification mechanism is used in an optical fiber fence security and protection system, abnormal vibration events are intercepted, abnormal event data is subjected to artificial network identification operation, intelligent identification calculation of a normal vibration data segment can be prevented, fence safety and protection invasion event identification processes are enabled to be pertinent, and work efficiency of an optical fiber fence invasion alarm system can be improved.

Description

technical field [0001] The invention relates to the field of optical fiber fence security, in particular to a distributed fiber optic fence vibration intrusion identification system. Background technique [0002] The fiber optic fence uses fiber optic vibration as the sensing object, which has many advantages such as wide monitoring range, high sensitivity, good environmental adaptability, and strong anti-interference ability, and is widely used in the security field. [0003] The working principle of the fiber optic fence security alarm system is: when the fence intrusion occurs (such as climbing, trampling, shaking, squeezing, etc.), the fiber optics on the fence can generate tiny vibrations; Acquisition, combined with advanced signal processing and pattern recognition methods, identifies fence intrusion behaviors, and reports intrusion alarm information (including alarm location, alarm type, duration, etc.) to the security management system in real time and reliably. The...

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Problems solved by technology

[0004] Most existing fiber optic fence security systems rely on energy thresholds or zero-crossing rate thresholds to identify intrusion events, which better solves the problem of intrusion behavior alarms, but it cannot accurately identify specific intrusion behaviors such as kicking and climbing

At the same time, optical fiber vibrations in harsh natural environments such as heavy storms are also easily identified as intrusions, resulting in a large number of false alarms

[0005] Although the fiber optic fence security system with pattern recognition function can accurately identify specific behavior events of fence intrusion, the system has a lot of redundant calculations, that is, it performs pattern recognition processing on all fiber optic vibration signals, and lacks the distinction between normal vibration data and abnormal data. , resulting in a large amount of data processing in the fiber optic fence security system

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