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Digging Behavior Recognition Method for Buried Optical Fiber Sensor Vibration Detection System

A fiber optic sensing and detection system technology, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve problems such as mining behaviors that do not pay attention to threats, and reduce system leakage alarms and system false alarms. Effect

Active Publication Date: 2020-12-29
WUHAN WUTOS
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Problems solved by technology

The above techniques focus on whether the system detects strong vibrations, but not whether the detected vibrations are truly threatening digging behavior

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  • Digging Behavior Recognition Method for Buried Optical Fiber Sensor Vibration Detection System
  • Digging Behavior Recognition Method for Buried Optical Fiber Sensor Vibration Detection System
  • Digging Behavior Recognition Method for Buried Optical Fiber Sensor Vibration Detection System

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Embodiment Construction

[0051] 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.

[0052] In the excavation behavior recognition method of the buried optical fiber sensor vibration detection system of the present invention, according to the current numerical fluctuation range of the vibration signal detected by the optical fiber, a numerical value for feature calculation is automatically calculated and configured for each detection position to avoid interference The impact of fading on signal analysis provides an alarm method for mining behavior.

[0053] Such as figure 1 As shown, it is a structural schematic diagram of the buried optical fiber sensor vibration detection system...

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Abstract

The invention discloses an excavation behavior identification method of a buried fiber sensing vibration detection system. The method comprises the following steps that buried fiber sensing vibrationdetection units obtain fiber sensing signals; a low-frequency part is filtered from each fiber sensing signal; the signal fluctuation characteristics after filtering are calculated; and when a value of the signal fluctuation characteristic of certain detection unit exceeds a threshold, single-point analysis is carried out on the detection unit itself and neighbor detection units thereof, and whether there is an excavation behavior or other interference is determined. Thus, destructive excavation behaviors can be effectively distinguished from non-destructive interference caused by vehicles, and mis-alarm of the system can be reduced.

Description

technical field [0001] The invention relates to the field of optical fiber sensing, in particular to an excavation behavior identification method for a buried optical fiber sensing vibration detection system. Background technique [0002] Security products based on fiber optic sensor vibration detection technology can be divided into two types: hanging net and buried according to the installation method. The detection principle is mainly based on fiber optic interferometer technology, fiber grating vibration sensor technology and other types. Buried optical fiber security products have a relatively broad market demand in some scenarios where physical physical fences (nets) or walls cannot be installed due to their advantages such as good concealment and strong anti-environmental interference. The main application scenarios are: oil and gas pipeline anti-excavation damage, perimeter intrusion detection, etc. [0003] Patent CN200910229192 The safety real-time monitoring meth...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H9/00G08B21/18
CPCG01H9/004G08B21/182
Inventor 杨玥闫奇众徐绍刚彭特刘洪凯
Owner WUHAN WUTOS
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