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Directive bunching detection method aiming at specific regions

A specific area and detection method technology, applied in the direction of seismic signal processing, etc., can solve the problems of long time-consuming, large amount of calculation of nuclear explosion and earthquake events, etc.

Active Publication Date: 2016-07-06
CTBT BEIJING NAT DATA CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a directional spotlight detection method for a specific area, which solves the problem of large amount of calculation and long time-consuming for detecting nuclear explosion and seismic events in a specific area by using an array, and further improves the detection method for nuclear explosion events in a specific area. monitoring capability

Method used

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  • Directive bunching detection method aiming at specific regions
  • Directive bunching detection method aiming at specific regions
  • Directive bunching detection method aiming at specific regions

Examples

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Embodiment

[0054] Embodiment: A directional spotlight detection is carried out for a nuclear explosion earthquake event in a specific area. By analyzing the signal spectrum recorded by the monitoring array for historical events, the slowness vectors Snm and Sem corresponding to the maximum value of the signal spectrum are determined, and they are used as the directional beamforming parameters of the array for signal detection in this area. see figure 1 and figure 2 By comparing the detection results, it can be seen that the signal detection probability of the nuclear explosion seismic signal in a specific area is higher than the threshold, and an event alarm is given; the detection probability of natural seismic signals in other areas is basically 0, and no event alarm is given. The specified area is a nuclear test site in a certain country.

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Abstract

The invention discloses a directive bunching detection method aiming at specific regions. Signal detection probability can be calculated by adopting an F detection theory, and an array is guaranteed only to be sensitive to some seismic phases in the specific regions by designating array signal bunching processing of slowness vectors, and then the detection of other seismic phases from other regions or the signals in other regions can be filtered. When the signal detection probability P is greater than the set detection threshold, the result of the nuclear earthquake events in the specific regions can be given, and therefore the detection efficiency is higher. The directive bunching detection method is advantageous in that the directivity is strong, the detection sensitivity is high, the flow is concise, the calculation quantity is small, and the realization is convenient.

Description

technical field [0001] The invention belongs to the field of nuclear explosion earthquake monitoring, and in particular relates to a directional spotlight detection method for a specific area, and specifically relates to a seismic array monitoring technology in the nuclear explosion earthquake monitoring in a specific area. Background technique [0002] The seismic array is the main seismic monitoring facility in the international monitoring system. It is a group of seismometers regularly arranged within the aperture range equivalent to the wavelength of the observed seismic waves. Through various combined analysis of the output signals of this group of seismometers, Reduce background noise, highlight useful seismic wave signals and obtain information about seismic sources and the internal structure of the earth. The existing seismic data processing system adopts the coherent beamforming method for array signal processing, which improves the signal-to-noise ratio by performi...

Claims

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Application Information

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IPC IPC(8): G01V1/36
CPCG01V1/36
Inventor 刘哲函唐恒专王晓明唐伟王燕李靓王媛
Owner CTBT BEIJING NAT DATA CENT
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