Digital n-gamma real-time discrimination system

A digital pulse and initialization technology, applied in the field of digital n-gamma real-time discrimination systems, can solve the problems of not fully considering the characteristics of nuclear pulse signals, complex algorithms, inability to complete real-time processing, etc., to meet real-time discrimination and low computational complexity. , the effect of strong screening ability

Inactive Publication Date: 2018-10-09
中国人民解放军火箭军工程大学
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Problems solved by technology

This type of algorithm can obtain a high-accuracy screening effect, but it does not fully consider the characteristics of the nucl

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[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0059] In the field of engineering practice and application, if the real-time screening of digital n-γ rays is to be realized, it is often limited by the actual working conditions such as the bus width of the screening system and FPGA processing speed, which will make the algorithm with high precision and high confidence Therefore, it is necessary to find a screening algorithm that can be realized in engineering practice and does not bring great difficulties to...

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Abstract

The invention discloses a digital n-gamma real-time discrimination system. The system comprises a detector, a data acquisition card, an FPGA hardware platform and an upper computer. The detector is used for converting an n ray and a gamma ray into current signals. The data acquisition card is used for collecting the current signals and converting the current signals into digital pulse signals. TheFPGA hardware platform is used for calculating the centroid analysis providing parameters of the digital pulse signals through using an improved centroid algorithm according to the acquired digital pulse signals and is also used for determining a digital pulse signal amplitude and digital pulse signal time information according to the acquired digital pulse signals. The upper computer is used forstoring the centroid analysis providing parameters, the digital pulse signal amplitude and the digital pulse signal time information and drawing a n-gamma discrimination spectrogram according to storage information. By using the system of the invention, the improved centroid algorithm can be well realized, the n ray and the gamma ray can be distinguished, calculating complexity is low, a discrimination capability is high and a real-time discrimination requirement can be satisfied.

Description

technical field [0001] The invention relates to the technical field of n-γ real-time screening, in particular to a digital n-γ real-time screening system. Background technique [0002] Most neutron radiation fields are accompanied by γ-rays, which mainly originate from the γ-scattering of the neutron source itself and the captured γ-rays during the moderation. Usually, n-γ screening is required when particle detection is carried out in a mixed radiation field of n and γ rays. The influence of neutrons is excluded during the measurement; the third is to eliminate the influence of each other when performing n-γ joint analysis. Usually, neutron measurements are often accompanied by a large number of gamma rays due to the inelastic scattering of neutrons and the surrounding environment and the slowing down of neutron capture. Most neutron detectors are also sensitive to gamma rays, so in order to improve the accuracy of neutron measurement, the interference of gamma rays must ...

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Application Information

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IPC IPC(8): G01T1/38G01T3/00
CPCG01T1/38G01T3/00
Inventor 许鹏王宋牛莉博霍勇刚周满姚青旭黎素芬
Owner 中国人民解放军火箭军工程大学
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