Multi-source positioning method based on airborne radioactivity monitoring system

Abstract

The invention discloses a multi-source positioning method based on an airborne radioactivity monitoring system. The method comprises the steps that the airborne radioactivity monitoring system measures a spatial multi-point dose rate value and records the GPS coordinate of each point; a regional model is established, and a plurality of initial hypothetical radioactive sources are randomly generated in the region; the weight value of each hypothetical radioactive source is calculated through the spatial multi-point dose rate value; the hypothetical radioactive sources are moved in the region; aplurality of new hypothetical radioactive sources are randomly generated in the region; hypothetical radioactive source information is iteratively updated, and then multi-source parameter informationis estimated and multi-source positioning is achieved. The multi-source positioning method based on the airborne radioactivity monitoring system has the advantages that the method is simpler, a complex model does not need to be established, the complexity is independent of the number of the radioactive sources, the hypothetical radioactive sources are updated through iteration, and the distribution of the multiple radioactive sources can be more realistically restored; in addition, the multiple radioactive sources, shielding material wrapping radioactive sources and the like can be accuratelypositioned, prior knowledge of a radioactive space environment and shape and size information of space obstacles are not required, and the scope of application is wide.

Description

technical field [0001] The invention relates to a positioning method for multiple radioactive sources, in particular to a multi-source positioning method based on a radioactive monitoring system, which belongs to the field of radioactive material detection. Background technique [0002] A radioactive bomb (dirty bomb) is a weapon that spreads radioactive substances in a large area. The radioactive substances disseminated after its explosion will cause harm to the human body and cause catastrophic ecological damage. In particular, criminals sometimes carry or hide multiple dirty bombs in order to increase the probability of creating vicious events. Therefore, the detection and location of dirty bombs is particularly important, which will significantly reduce the impact of dirty bombs on humans, the ecological environment, and social economy. [0003] At present, the methods used for radioactive source detection and location are mainly aimed at a single radioactive source, an...

AI Technical Summary

Problems solved by technology

[0003]Currently, the methods used for radioactive source detection and location are mainly aimed at a single radioactive source, and it is difficult to obtain accurate radioactive source information for multiple radioactive sources;

[0004]The radioactive source localization method used for the detection and localization of multiple radioactive sources, its core idea is to estimate by reducing the difference between model estimated data and measured data The number, intensity and location of radioactive sources, the number of parameters in the method is proportional to the number of radioactive sources, and the computational complexity of the method increases exponentially with the increase of the number of radioactive sources

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