Neutron back scattering plastic landmine imaging method based on probability matrix source tracing
An imaging method and probability matrix technology, applied in the field of nuclear radiation detection and imaging, can solve problems such as high false alarm rate and large influence of soil uniformity, and achieve the effect of precise positioning conditions
Active Publication Date: 2019-10-11
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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At present, neutron backscatter plastic landmine detection technology mainly uses backscatter neutron count anomalies to judge whether there are mines in the detection area [Chu Chengsheng et al. Experimental research on neutron backscatter mine detection. Proceedings of National Symposium on Hazardous Substances and Safety Emergency Technology. 2011, 450 ~ 454; Cao Lin et al. Analysis and evaluation of neutron backscatter mine detection technology. Atomic Energy Science and Technology. 2012, 46(10): 1274 ~ 1280.], this method is affected by the uniformity of soil and the organic Impurities have a greater influence, so there is usually a higher false alarm rate
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[0054] combine figure 1 and figure 2 , the neutron backscatter plastic landmine imaging method based on probability matrix traceability of the present invention comprises the following steps:
[0055] a. Fixed layout to obtain the influence factor of system direct neutrons on position-sensitive slow-heating neutron detectors;
[0056] In step a, the specific steps for obtaining the influence factor of system direct neutrons on position-sensitive slow-heating neutron detectors are as follows:
[0057] a1. The layout of each module is fixed. The modules include the neutron generator module, the position-sensitive slow-heating neutron detector module and the neutron yield monitoring module. The structure includes the moderation shielding structure, the mechanical fixing structure and the mobile platform structure. The relative positions of the structures are kept fixed, and the modules and structures are suspended, and no backscattered neutrons are generated under the modules ...
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The invention discloses a neutron back scattering plastic landmine imaging method based on probability matrix source tracing. The method comprises the following specific steps of: obtaining an influence factor of a system direct irradiation neutron on a position sensitive slow thermal neutron detector; measuring the influence factor of a bottom back scattering neutron on the position sensitive slow thermal neutron detector; measuring a target area to obtain response distribution of the sensitive slow thermal neutron detector of the target area; correcting the influence of direct neutrons in the target area; correcting the influence of background back scattering neutrons in the target area; and performing inversion imaging on the corrected data by using a probability matrix to obtain the plastic landmine burying distribution. Compared with a traditional counting abnormity judgment method, the method provided by the invention provides distribution information of the soil landmine burying, and improves the landmine detection accuracy while reducing the landmine detection workload.
Description
technical field [0001] The invention belongs to the field of nuclear radiation detection and imaging, and in particular relates to a neutron backscattering plastic landmine imaging method based on probability matrix traceability. Background technique [0002] There are various types of landmines, and the background of laying them is complicated. Landmines with different appearance characteristics and different materials are buried in soil with different soil quality, different vegetation and soil mixed with different materials, which makes the identification of mine targets very complicated, and "mine detection" has thus become a recognized worldwide problem . All the military powers in the world are constantly carrying out multi-channel exploration work aiming at the different characteristics of landmines. At present, the most widely used and most mature landmine detection method is metal mine detection. This method judges the existence of landmines by detecting the metal...
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IPC IPC(8): G01V5/00G01N23/204
CPCG01N23/204G01V5/222
Inventor 张迎增曾军郭小峰向永春郝樊华向清沛储诚胜秦义
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF