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Landslide infrasound signal recognizing method

A signal recognition and infrasound technology, which is applied in the direction of sound presence detection, measuring devices, instruments, etc., can solve the problems of not eliminating environmental interference noise, low recognition accuracy, and inability to distinguish landslide infrasound signals, so as to eliminate environmental noise Interference, the effect of accurate identification

Active Publication Date: 2019-09-03
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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  • Landslide infrasound signal recognizing method
  • Landslide infrasound signal recognizing method
  • Landslide infrasound signal recognizing method

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Embodiment Construction

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

[0043] The overall steps of the present invention are as figure 1 Shown. Landslides are classified into soil landslides and rock landslides according to their constituent materials. The embodiments of the present invention mainly introduce soil landslides, and this method is also applicable to rock landslides. The embodiment of the present invention is as follows:

[0044] (1) Carry out multiple indoor simulation tests of landslide disasters on a variety of collected (at least 10 types of soil) and different types of soil (all from landslide bodies) (each type of soil is different according to the degree of compaction and particle gradation, at least Carry out 20 sets of tests, each set of tests can extract several effective landslide infrasound signals according to the signal quality and duration), and collect a large number of infrasound signals generated by d...

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Abstract

The invention provides a landslide infrasound signal recognizing method, which comprises the following steps: multiple different types of soil from a landslide body are collected to obtain landslide infrasound signals; environment interference infrasound signals are collected in a wild field; relevant characteristics of the above landslide infrasound signals and the interference infrasound signalsin time and frequency domains and characteristic differences are analyzed respectively to extract a series of key characteristics with characterization; and according to the key characteristics, in combination of a KNN classification algorithm, a landslide infrasound signal intelligent recognition model is built, and monitored signals are discriminated. Environment noise interference can be eliminated, and accurate landslide infrasound signal recognition is realized.

Description

Technical field [0001] The invention relates to the technical field of geological disaster monitoring, in particular to a method for identifying infrasound signals of landslides. Background technique [0002] From the beginning to the final sliding process of the landslide body, due to the deformation, fracture and friction of the slope body, infrasound waves with a certain frequency, which can be steadily propagated in the air and contain important geological information, are released. The infrasound signal generated by the landslide body in the catastrophic process has its unique characteristics in the time and frequency domains. The propagation speed of infrasound has nothing to do with air density, pressure, etc., but only related to temperature, and its acoustic emission source is spherical wave without direction. Sex, spread to all directions. In addition, infrasound has the characteristics of strong penetrating power, weak viscous effect of air and water, less distortion ...

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Application Information

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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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