Fiber Bragg grating perimeter intrusion pattern recognition method and system
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A pattern recognition and fiber grating technology, applied to instruments, alarms that rely on interference with short-wavelength radiation, burglar alarms, etc., can solve problems such as the inability to effectively identify animal touching behaviors or knocking behaviors, and achieve environmental resistance Strong, low false recognition rate, high sensitivity effect
Active Publication Date: 2013-10-09
WUHAN WUTOS
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[0004] The technical problem to be solved by the present invention is to provide a fiber grating perimeter intrusion mode that can effectively identify the touching behavior or knocking behavior of animals in view of the defects in the prior art that cannot effectively identify the touching behavior or knocking behavior of animals Identification method and system
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[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0038] like figure 1 As shown, the fiber grating perimeter intrusion pattern recognition method in the embodiment of the present invention is mainly performed by the pattern recognition system in the following embodiments, and the method specifically includes the following steps:
[0039] S1. Receive the external vibration signal demodulated by the fiber grating demodulator;
[0040] S11, judging whether the vibration amplitude of the external vibration signal is greater than a threshold;
[0041] S2. When the vibration amplitude of the external vibration signal is greater than the threshold, jud...
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Abstract
The invention discloses a fiber Bragg grating perimeter intrusion pattern recognition method and system. The method comprises the following steps: an external vibration signal which is demodulated through a fiber Bragg grating demodulation instrument is received; when the vibration amplitude of the external vibration signal is greater than a threshold value, whether an abnormal event happens is judged according to preset conditions; if the abnormal event happens, a signal with a fixed time span is intercepted from the external vibration signal, and the intercepted signal with the fixed time span is preprocessed so as to reduce the effects of system noise on a system; a time-domain signal fluctuation extreme value of the preprocessed signal is calculated; the time-domain signal fluctuation extreme value is subjected to curve fitting, and characteristic parameters of a curve after the fitting are extracted; whether the values of the characteristic parameters meet animal touch action or knock action pattern recognition conditions which are set in advance is judged; if the values of the characteristic parameters meet the conditions, pattern recognition information is generated and output to monitoring equipment. The fiber Bragg grating perimeter intrusion pattern recognition method and system can effectively recognize perimeter animal touch events, and is high in sensitivity, strong in resistance to the environment, and low in erroneous recognition rate.
Description
technical field [0001] The invention relates to the field of perimeter security, in particular to a fiber grating perimeter intrusion pattern recognition method and system. Background technique [0002] Perimeter security refers to important areas, such as national defense borders, military bases, key government departments, oil depots and coal fields, nuclear power plants, solar power plants, power plant substations, banks, prisons, museums, airports, ports, villa communities, data centers, water treatment Factories, chemical plants, schools and other major infrastructures, in order to prevent illegal intrusion and sabotage activities, form security precautions along the perimeter of the site; ensure that personnel and property in the defense zone are under protection and control, and restrict the behavior of entering and leaving the defense zone , once the target enters and exits the defense zone from the prohibited section, it can be detected in time and the specific loca...
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