Addressing method and system for quasi-distributed fiber grating perimeter intrusion alarm system

Abstract

The invention discloses an addressing method and an addressing system for a quasi-distributed fiber bragg grating perimeter intrusion alarming system. The addressing method for the quasi-distributed fiber bragg grating perimeter intrusion alarming system comprises the following steps: acquiring real-time wavelength data information of each fiber bragg grating sensor; calculating wavelength reference values of the fiber bragg grating sensors, and excluding influence of a temperature drift effect; calculating wavelength deviation variations of the fiber bragg grating sensors, and judging whether the wavelength deviation variations meet a preset sensitivity threshold triggering condition; if ,the wavelength deviation variations meet a preset sensitivity threshold triggering condition, selecting a data sequence which has a preset time span and whose wavelength deviation changes along with the time, and calculating low-frequency signal energy within the time span; calculating and comparing low-frequency energy of adjacent fiber bragg grating sensors, selecting a fiber bragg grating sensor with the maximum low-frequency energy, and recognizing the position of the fiber bragg grating sensor as an intrusion address so as to give an alarm. According to the addressing method and the addressing system, the invasion addressing accuracy is improved, the environmental adaptability of the quasi-distributed fiber bragg grating perimeter intrusion alarming system is enhanced, and market promotion of the fiber bragg grating perimeter intrusion alarming system is facilitated.

Description

technical field [0001] The invention relates to the field of perimeter security technology and an optical fiber grating sensor network signal processing method, in particular to an addressing method and system for a quasi-distributed optical fiber grating perimeter intrusion alarm system. Background technique [0002] The existing fiber Bragg grating intelligent addressing perimeter intrusion self-adaptive alarm system (CN101840615) mainly judges whether to alarm by the vibration amplitude of a single sensor waveform. At the same time, the optical fiber perimeter intrusion system (CN101556724) has the defects of inaccurate positioning and high false alarm rate. The intrusion detection and positioning method of the anti-intrusion system sensor network (CN101860866B) is aimed at the extraction of characteristic information of a single sensor; the implementation method of the optical fiber vibration processor system (CN101639963) uses the combination of FPGA and DSP to process ...

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