Pre-judging method of characteristics of nuclear component material driven by 252Cf source

A discriminant method, source-driven technology, applied in the analysis of materials, computer components, material analysis using wave/particle radiation, etc., can solve problems such as single, no pre-judgment mechanism, non-nuclear material interference characteristic parameters, etc., to strengthen the identification Effect, effect of recognition result enhancement

Inactive Publication Date: 2015-06-24
CHONGQING UNIV
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Problems solved by technology

[0006] The technical problem solved by the present invention is how to obtain information on the thickness of unknown nuclear components, remove the interference of non-nuclear materials, determine the characteristics of materials of unknown nuclear components, and judge the thickness and material of materials, so as to overcome the lack of pre-judgment mechanism in the existing system, which is easily disturbed by non-nuclear materials and Disadvantages of a single feature parameter

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  • Pre-judging method of characteristics of nuclear component material driven by 252Cf source
  • Pre-judging method of characteristics of nuclear component material driven by 252Cf source
  • Pre-judging method of characteristics of nuclear component material driven by 252Cf source

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Embodiment Construction

[0050] The present invention will be described in further detail through the following examples, but the present invention is not limited to the scope of the examples.

[0051] see Figure 4 , a based on 252 Pre-discrimination method of material characteristics of nuclear components driven by Cf source: firstly, adopt 252 Cf source-driven noise analysis method and a series of standard materials to establish a calibration database of neutron peak position, neutron peak ratio and gamma peak count value that can reflect material thickness and material; then, adopt 252 The Cf source-driven noise analysis method extracts the neutron peak position, neutron peak ratio and gamma peak count value of the component to be tested; finally, compares and calculates the extracted three values ​​with the calibration database to obtain the material characteristic parameters of the component to be tested ;

[0052] The material characteristic parameters include thickness interpretation, non-n...

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Abstract

The invention discloses a pre-judging method of characteristics of a nuclear component material driven by a 252Cf source. The method mainly comprises, aiming at thickness and material information of the nuclear component material, pre-judging work by means of a time domain related model and signal processing method. The time domain related model and signal processing method comprises three main aspects: intercepting the thickness of an unknown nuclear component material by a neutron peak position in a source-probe inter-time domain related function; analyzing the ascending edge and descending edge of the neutron peak to put forward a neutron ratio method, and eliminating interference of a non-nuclear material and initially judging the material of the nuclear component; and determining the material of the unknown nuclear component and enhancing the judging result by means of gamma count value of the source-probe inter-time domain related function. According to the method, a better pre-judging effect of the nuclear component material is obtained due to the unprecedented non-nuclear material eliminating capacity and judging capacity for material and thickness characteristics of the nuclear component.

Description

technical field [0001] The invention belongs to the technical field of digital signal processing and verification, and relates to a 252 Pre-discrimination method for unknown nuclear component materials driven by Cf source. Background technique [0002] The nuclear material identified system (Nuclear Material Identified System, NMIS) in the field of verification technology, that is, the nuclear material verification system, aims to measure the characteristic parameters of nuclear materials, so as to infer its use field. Its important function is to detect the enrichment of nuclear materials (the enrichment of nuclear materials is an important symbol to distinguish between weapon grade and civilian grade, and it can be inferred from it that it has the level of the national nuclear industry). From the perspective of the way to obtain the radiation signal of nuclear materials, the verification technology route is usually divided into two types: passive and active. Limited to t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/62G01B15/02G01N23/00
Inventor 杨帆魏彪冯鹏米德伶任勇
Owner CHONGQING UNIV
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