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A landslide infrasound signal recognition method

A signal recognition and infrasound technology, applied in the direction of sound existence detection, seismology, instruments, etc., can solve the problems of low recognition accuracy, failure to eliminate environmental interference noise, and inability to distinguish landslide infrasound signals, so as to achieve accurate identification, The effect of eliminating environmental noise interference

Active Publication Date: 2020-06-16
CHENGDU UNIV OF INFORMATION TECH +1
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Problems solved by technology

However, the problem with this type of technology is that it does not eliminate the influence of environmental interference noise (many phenomena or events in nature will generate infrasonic signals), resulting in low recognition accuracy
[0005] If this method is applied to landslide monitoring and early warning, the defect is that the characteristics of landslide infrasound signals are completely different from those of debris flow infrasound signals, and it is impossible to distinguish landslide infrasound signals by using the identification method of debris flow infrasound signals

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  • A landslide infrasound signal recognition method
  • A landslide infrasound signal recognition method
  • A landslide infrasound signal recognition method

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Embodiment Construction

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0043] Overall steps of the present invention are as figure 1 shown. Landslides are divided into soil landslides and rock landslides according to their constituent materials. The embodiments of the present invention mainly introduce soil landslides, and the method is also applicable to rock landslides. Embodiments of the present invention are as follows:

[0044] (1) Carry out indoor simulation experiments of landslide catastrophe on a variety of (at least 10 types of soil) different types of soils (all from landslide bodies) collected (each soil is different according to the degree of compaction and particle gradation, at least Carry out 20 groups of experiments, each group of experiments can extract several effective landslide infrasound signals according to the signal quality and duration), and collect a large number of infrasound signals...

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Abstract

The invention provides a method for identifying landslide infrasound signals, comprising the following steps: collecting various types of soil from landslide bodies to obtain landslide infrasound signals; collecting environmental interference infrasound signals in the field; analyzing the landslide times respectively A series of representative key features are extracted based on the relevant features and feature differences of the acoustic signal and the interfering infrasound signal in the time and frequency domains; according to the key features, combined with the KNN classification algorithm, an intelligent identification model of the landslide infrasound signal is established , to discriminate the monitored signal. The invention can eliminate environmental noise interference and realize accurate identification of landslide infrasound signals.

Description

technical field [0001] The invention relates to the technical field of geological disaster monitoring, in particular to a landslide infrasound signal identification method. Background technique [0002] From the beginning of the development of the landslide to the final slide, infrasound waves with a certain frequency, which can propagate stably in the air and contain important geological information will be released due to deformation, fracture and friction of the slope. The infrasound signal generated by the landslide during the catastrophe has its unique characteristics in the time and frequency domains. The propagation speed of the infrasound wave has nothing to do with air density, pressure, etc., but only with temperature, and the source of its acoustic emission is a spherical wave, which has no direction. Sex, spread in all directions. In addition, infrasound has the characteristics of strong penetrating power, weak viscous effect of air and water, less distortion du...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/00
CPCG01V1/001
Inventor 刘敦龙唐聃吴非何磊张少杰高燕岳希
Owner CHENGDU UNIV OF INFORMATION TECH
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