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Estimation method for three-dimensional distribution of radioactive source intensity

A technology of three-dimensional distribution and intensity distribution, applied in the field of nuclear radiation detection, to achieve accurate estimation, shorten calculation time, and improve accuracy

Active Publication Date: 2021-09-28
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to estimate the intensity distribution of radioactive sources in the three-dimensional complex environment of nuclear emergency

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  • Estimation method for three-dimensional distribution of radioactive source intensity
  • Estimation method for three-dimensional distribution of radioactive source intensity
  • Estimation method for three-dimensional distribution of radioactive source intensity

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Embodiment Construction

[0044] The following describes several preferred embodiments of the present invention with reference to the accompanying drawings, so as to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

[0045] In the drawings, components with the same structure are denoted by the same numerals, and components with similar structures or functions are denoted by similar numerals. The size and thickness of each component shown in the drawings are shown arbitrarily, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of parts is appropriately exaggerated in some places in the drawings.

[0046] Such as Figure 1-3 shown, refer to figure 1 , the concrete realization process of the present invention is as follows:

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Abstract

The invention discloses an estimation method for three-dimensional distribution of the radioactive source intensity, and relates to the field of nuclear radiation. A mathematical model is established to represent the relationship between radioactive source intensity distribution and detection data, the problem of radioactive source intensity distribution estimation is converted into a mathematical problem of solving a linear equation, and the problem is solved through an MLEM iteration method to finally obtain an estimated value of the intensity distribution of the radioactive source in the environment. According to the scheme provided by the invention, the robot can complete the estimation of the intensity distribution of the radioactive source under the condition that only a small amount of gamma camera detection data exists, and each element in a system matrix is analyzed and calculated according to a geometrical relationship by establishing the mathematical model, the robot achieves the online estimation of the intensity distribution of the radioactive source, improves the accuracy, and is suitable for a complex environment with an obstacle.

Description

technical field [0001] The invention relates to the field of nuclear radiation detection, in particular to a method for estimating the three-dimensional distribution of radioactive source intensity. Background technique [0002] While the development of nuclear energy has brought huge economic and social benefits to people, it has also brought huge hidden dangers to safety. Once an accident occurs in a nuclear device, the site is generally highly radioactive, and human work in a high-radiation environment is limited or completely impossible. In this environment, it becomes an option for robots to complete emergency response to accidents. The various charged particles and high-energy rays produced by nuclear accidents have also brought many challenges to robots. When the radiation dose received is too high, the computer system, sensors and other equipment carried by the robot may face the risk of failure. [0003] The traditional gamma ray detection equipment is a Geiger c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/16
CPCG01T1/16
Inventor 熊振华张智宇郭政亚吴建华
Owner SHANGHAI JIAO TONG UNIV
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