A three-station positioning algorithm for explosion infrasonic waves

Abstract

The invention relates to a three-station positioning algorithm for explosion infrasonic waves. The invention carries out positioning calculation and program realization for the triangular array through the arrival time difference of the sound wave, and is used for judging the incoming wave direction of the explosion infrasound event and estimating the distance of the explosion point. Through the chemical explosion experiment verification of this algorithm, the orientation accuracy is within 2°, and the distance estimation accuracy for the actual distance of 1550m is within 60m. Compared with the simplest three-station infrasound positioning technology, it has achieved high positioning accuracy, providing technical reserves for the development of new nuclear explosion monitoring equipment and the construction of nuclear explosion monitoring systems, and is of great significance to my country's nuclear explosion detection and national defense construction.

Description

technical field The invention relates to a three-station positioning algorithm for explosion infrasound waves, which is used for determining the incoming wave direction of the infrasound signal and estimating the distance of the explosion point. Background technique Infrasound is one of the four (infrasound, earthquake, hydroacoustic, and radionuclide) verification technical means of the Comprehensive Nuclear-Test-Ban Treaty (CTBT), and it is the main technical means for remote nuclear test nuclear explosion monitoring in the atmosphere. The International Monitoring System (IMS) of the "Comprehensive Nuclear Test Ban Treaty" Organization Committee (CTBTO) plans to build 60 infrasound monitoring stations around the world. So far, 41 monitoring stations have passed the IMS infrasound monitoring network certification, and the rest Construction of the site is in progress. The average distance between the stations of the IMS infrasound monitoring network is about 2000km, which c...

AI Technical Summary

Problems solved by technology

Existing infrasound positioning methods mostly use time-of-arrival or time-of-arrival for positioning, and most of them use quadratic nonlinear equations, which are easy to amplify errors when performing positioning calculations, and often locate false targets, which require manual intervention to eliminate

Using angle measurement intersection positioning requires multiple infrasound arrays, and at least two azimuth lines can be measured to intersect and locate. This method requires that the measurement baselines of each infrasound array should not be too close, causing the measurement signals to be easily out of sync, which will lead to positioning failure.

The above method can only locate specific events (such as flood discharge, debris flow, etc.), and its applicability is not strong, and it cannot meet the requirements of unattended and real-time positioning of nuclear explosion events in actual situations

Affected by the stagnation of nuclear explosion infrasound technology, the research on nuclear explosion infrasound positioning technology has no precedent in China

Although there are researches in foreign countries, key technologies such as positioning algorithms are kept secret and have not been reported in public

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