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Radioactive spectrum identification method

An identification method and performance spectrum technology, which are applied in X-ray energy spectrum distribution measurement, special data processing applications, instruments, etc., can solve the problems of inability to perform energy spectrum identification, reduced identification accuracy, and difficulty in training, so as to avoid failure to converge. or local convergence, fast training, and the effect of eliminating interference signals

Inactive Publication Date: 2012-01-11
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

These methods have the disadvantages of being difficult to train, or difficult to converge, or converge to a local minimum, which leads to the failure of energy spectrum recognition or the reduction of recognition accuracy. method, so that the identification of the energy spectrum can be carried out smoothly and can ensure a higher identification accuracy

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  • Radioactive spectrum identification method
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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0021] Due to the protection of nuclear information, it is not necessary to obtain accurate results of nuclide activity, but only to identify what kind of nuclear material the measured object is. Aiming at this situation, the present invention provides a radioactivity spectrum identification method. figure 1 The flow chart of the identification method of the present invention is shown.

[0022] Process flow of the present invention such as figure 1 As shown, it specifically includes the following training steps ① and recognition steps ②:

[0023] ① To train the energy spectrum measured in the radioactivity measurement, follow the steps A~E as follows:

[0024] A. Classify the measured multiple energy spectra according to the type of radioactive source—for exa...

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Abstract

The invention discloses a radioactive spectrum identification method comprising the following steps of: carrying out filtration, dimension reduction and classified treatment on measured energy spectrum in radioactive measurement, extracting feature vectors of energy spectrums as samples, and obtaining the GMMs (Gaussian Mixture Models) of all kinds of feature vectors through training; solving the feature vectors of energy spectrums to be identified and solving the class conditional probability density of the feature vectors according to the GMMs; and then carrying out decision classification to finish energy spectrum identification. The radioactive spectrum identification method has high energy spectrum identification accuracy rate and is an effective method for radioactive spectrum identification.

Description

technical field [0001] The invention relates to a radioactivity spectrum identification method. Background technique [0002] In the energy spectrum measurement of radioactivity, it is often necessary to analyze what radioactive source these random signals are produced based on a large amount of random data collected by the detector. The general radioactivity spectrum analysis method is to analyze the measured energy spectrum by smoothing, filtering, background subtraction, peak finding, and calculating the net peak area, etc., according to the results of the energy, peak shape and efficiency scale, the peak position is determined. The corresponding energies identify which radionuclides the source contains, and the activities of these radionuclides are calculated from the net peak areas. In some applications, due to the protection of nuclear information, it is not necessary to obtain accurate results of nuclide activity, but only to identify what kind of nuclear material th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/36G06F19/00
Inventor 黄洪全方方阎萍王超王敏龚迪琛丁卫撑刘念聪周伟刘易
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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