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Infrasound network directional search association method

A directional search and infrasound technology, applied in the direction of sound wave re-radiation, instruments, measuring devices, etc., can solve the problems that the signal cannot be quickly retrieved for local accurate positioning, the signal cannot be quickly and automatically retrieved, and effective matching, etc., to avoid global grid points Scanning, fast automatic retrieval and effective matching, the effect of improving efficiency

Active Publication Date: 2019-04-23
CTBT BEIJING NAT DATA CENT
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Problems solved by technology

[0006] The purpose of this invention is to provide a directional search correlation method for infrasound network, which solves the problem that the signal cannot be quickly retrieved and local accurate positioning, and also solves the problem of the atmospheric or surface The problem that the signals generated by explosive infrasound events cannot be quickly and automatically retrieved and effectively matched

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Embodiment

[0091] At 23:34 on August 12, 2015, Beijing time, two explosions occurred in the dangerous goods warehouse located in Tanggu Development Zone, Binhai New Area, Tianjin. The explosion location was about 39.044° north latitude and 117.736° east longitude. The present invention correlates the detection signals by using 43 infrasound monitoring signal detection results in the time period of 2015 / 8 / 1222:00-2015 / 8 / 1314:00, and the formed automatic correlation events are shown in Table 2, located in Latitude 36.00°, longitude 114.69°, the event coincided with the Tianjin Port explosion.

[0092] Table 2 Correlation results of the Tianjin Port chemical explosion event by the directional search method of the infrasound network

[0093] signal time

[0094] The present invention utilizes I30JP (Japan Tsukuba), I31KZ (Kazakhstan Aktobesk), I34MN (Mongolia Songjino), I39PW (Palau) and other four infrasound stations to correctly correlate the signals involved in the explosion eve...

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Abstract

The invention discloses an infrasound network directional search association method. According to the association activity degree and the effective monitoring distance of infrasound stations, the infrasound station with the high activity degree serves as a seed station, a monitoring signal of the seed station is a seed signal, and the to-be-associated stations are screened by combining with the effective monitoring distance; signals recorded by the to-be-associated stations with the low activity degree are matched with lattice points pointed by the seed signal correspondingly, the signals andlattice points which conform to the signal travel time, azimuth angles and the frequency attenuation law are screened, and the most probable source item lattice point is analyzed and screened throughthe matching degree; the small lattice points are set in a near field area of the seed station, and the large lattice points are set in a far field of the seed station to meet the requirements of nearfield accurate matching and far field fast search; and the position of the signal source item is determined preliminarily through a lattice point weighting method. Automatic search association and source item position preliminary estimation of a large-scale infrasound network for atmosphere and surface explosion infrasound signals are achieved.

Description

technical field [0001] The invention belongs to the field of infrasound monitoring and relates to a method for directional search and correlation of infrasound station networks. Background technique [0002] Infrasound monitoring technology is an effective technical means to effectively monitor atmospheric and ground explosion events. The International Monitoring System of the Comprehensive Nuclear-Test-Ban Treaty plans to establish a global monitoring network including 60 infrasound stations, and has completed the certification of 49 infrasound stations. , and transmit monitoring data to the international data center in real time. Incidents related to infrasound stations have become an important part of the Comprehensive Nuclear-Test-Ban Treaty Organization Audit Event Bulletin. The bulletin contains more than 2,440 related incidents related to infrasound stations, accounting for 17% of related incidents involving infrasound stations. Since infrasound stations are mainly d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/00
CPCG01S15/003G01S15/006Y02D30/70
Inventor 唐伟刘俊民王晓明王燕刘哲函
Owner CTBT BEIJING NAT DATA CENT
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