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A Method for Fitting Wind Noise-Wind Velocity of Infrasound Observatory

A wind noise and infrasound technology, applied in the field of infrasound monitoring, can solve the problem of inconsistent wind noise amplitude with the wind speed growth rate, and achieve the effect of avoiding model errors

Active Publication Date: 2019-06-21
CTBT BEIJING NAT DATA CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for fitting infrasound station wind noise-wind speed data, which solves the influence of the wind noise amplitude value inconsistent with the wind speed growth rate under the conditions of low wind speed and high wind speed; The problem of large model errors caused by data influence; it can be used to calculate the amplitude level of the recorded signal of the infrasound station at a specific wind speed, evaluate the effect of wind noise on the monitoring ability of the infrasound station, and select the site for the construction of the infrasound station Provide data support for disaster prevention and disaster prevention

Method used

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  • A Method for Fitting Wind Noise-Wind Velocity of Infrasound Observatory
  • A Method for Fitting Wind Noise-Wind Velocity of Infrasound Observatory
  • A Method for Fitting Wind Noise-Wind Velocity of Infrasound Observatory

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Experimental program
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Embodiment

[0057] Using the establishment method of infrasonic wind noise-wind speed numerical model established above, select the complete infrasound station monitoring data during one or more strong typhoons as the basic data for modeling, figure 1 The maximum wind speeds of the two typhoons shown are 34.3m / s and 48.4m / s respectively, and the noise and wind speed data of the H1 sub-typhoon of the I51GB station are used to fit the data. The specific process is as follows:

[0058] (1) Select sample points with wind speed less than 45m / s to directly perform 5th-order high-order fitting, and obtain a fitting curve within the range of wind speed 6.2-45m / s:

[0059]

[0060] (2), select sample points with wind speed less than 15m / s, for A rms Take the logarithm to get an A log = log 10 A rms ,

[0061] Then to A log , V max Perform 5th-order high-order fitting to obtain a fitting curve within the range of wind speed 0-6.2m / s:

[0062]

[0063] A I =10 A log

[0064] Fitting ...

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Abstract

The invention relates to a method for fitting infrasonic station wind noise-wind speed data, and on the basis of monitoring data of an international monitoring system infrasonic station affected by typhoon, a method for segmentation fitting of infrasonic wind noise-wind speed data is provided. A fifth-order polynomial is employed for fitting in a segmented interval, the infrasonic wind noise-wind speed data can correspond with actually measured data well, a method that a modeling data wind speed interval is larger than a model data interval is employed, and a relatively-large model error caused by end-point data influence is effectively avoided. The problem that under the condition of the low wind speed and the high wind speed, the increase rate of the amplitude of wind noise along with the wind speed is different is effectively solved.

Description

technical field [0001] The invention belongs to the field of infrasound monitoring, in particular to a method for segmentally fitting infrasonic wind noise-wind speed data. Background technique [0002] Infrasound monitoring technology is one of the four monitoring technologies specified in the "Comprehensive Nuclear Test Ban Treaty". Infrasound monitoring technology includes detection of infrasound signals, feature analysis, event identification, signal source location, intensity estimation, station and station Assessment of network monitoring capabilities, etc. The transmission of infrasound signals in the atmosphere is restricted by meteorological conditions, and the wind has a particularly significant impact on the transmission of infrasound signals and the monitoring capabilities of infrasound stations. Although the impact of wind noise can be reduced to a certain extent by laying out noise reduction pipe arrays, building windshield walls, and selecting sites with weak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H17/00G06F17/50
CPCG01H17/00G06F30/20
Inventor 唐伟刘哲函王燕王晓明刘俊民李靓王媛
Owner CTBT BEIJING NAT DATA CENT