Hazardous article detection device and method based on neutrons and X-rays

Abstract

The invention discloses a hazardous article detection device and method based on neutrons and X-rays, which relate to the technical field of public safety. A control system of the device is used for controlling a conveying belt to convey a to-be-detected article into an X-ray machine to perform X-ray detection on the to-be-detected article, controlling the conveying belt to convey the to-be-detected article into a detection area of a neutron source, and controlling the neutron source to rotate through a neutron source rotating system, so that the central axis of the neutron source penetrates through a hazardous article, and controlling a neutron source and a gamma ray detector to carry out neutron detection on the hazardous article to obtain a neutron detection result; and an element analysis system is used for determining the type of the hazardous article according to the X-ray detection result and the neutron detection result. The neutron source is rotated to the position where the hazardous article, the neutron source and the neutron source rotating system are on the same line through the neutron source rotating system, so that what can be ensured is that the target piece is closest to the suspected hazardous article, the number of 14MeV neutrons at the suspected hazardous article is maximum, and the detection efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of public safety, in particular to a neutron and X-ray-based dangerous goods detection device and method. Background technique [0002] Terrorist attacks with cargo and explosives are a common attack method used by terrorists. Therefore, the detection of explosives and other dangerous goods is very important for public safety. At present, explosives are mainly detected by X-rays. As a common detection method, X-ray detection uses three-dimensional imaging detection based on the different density of goods in the package, which has the advantage of fast detection speed. However, the density of many explosives is very close to that of common daily necessities. Therefore, false alarms often occur when detecting explosives from the density, and X-ray detection cannot identify the type of substance. [0003] Neutron detection technology can detect the chemical element composition and element content ratio of the ...

AI Technical Summary

Problems solved by technology

However, this type of scheme has the following disadvantages: 1) the detection efficiency is low

However, since the α-particle solid angle corresponding to the α-particle detector is fixed and cannot be adjusted, with the increase of the intensity of the neutron source, the existing α-particle detectors and electronic systems have problems such as signal blockage

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