Detection device based on energy dispersion X-ray diffraction

Abstract

The invention relates to a detection device based on energy dispersion X-ray diffraction. The detection device based on energy dispersion X-ray diffraction comprises an X-ray emission module, a displacement mechanism, a diffraction detection module and a controller, wherein the controller is electrically connected with the X-ray emission module, the displacement mechanism and the diffraction detection module and is used for controlling the work of each component and the acquisition of signals; the X-ray emission module emits incident beams, the incident beams penetrate different thicknesses of an object to be detected on the displacement mechanism to generate a plurality of diffracted beams, the diffraction detection module comprises a plurality of diffraction detection units, and each diffraction detection unit is arranged on a light path of the corresponding diffracted beam. Compared with the prior art, the X-ray diffraction technology is adopted, the drugs, explosives and other substances can be accurately identified, the detection range in the thickness direction of the object is enlarged, the detection time is shortened, the detection efficiency is improved, the device is low in cost and can be used at normal temperature, the whole system is small in size, and the detection device has important application prospects in the aspect of detection of contraband in the security inspection field.

Description

technical field [0001] The invention belongs to the technical field of X-ray security inspection, and relates to a detection device based on energy dispersive X-ray diffraction. Background technique [0002] At present, important security inspection places, such as airports, logistics and railway stations, mainly use X-ray perspective imaging technology to check for contraband. Security personnel make judgments based on the shape and brightness information of the perspective images of packages or luggage to be tested. X-ray fluoroscopy imaging technology can obtain the effective atomic number and density information of substances, and it has a good detection effect on metal substances with high atomic number, but it has a poor detection effect on substances with low atomic number such as daily organic matter, drugs and plastic explosives, and It is impossible to effectively distinguish daily organic matter, drugs, and explosives, so the accuracy of the detection of such cont...

AI Technical Summary

Problems solved by technology

However, it is very difficult to manufacture large-area pixel type high-purity germanium detectors 10, which can be developed by only a few foreign companies (U.S. Ortec Corporation, Canberra Corporation), and the price is extremely expensive (several million yuan).

In addition, the high-purity germanium detector 10 needs to be used at low temperature and must be equipped with a liquid nitrogen cooling system, resulting in a very large system as a whole

The above two points determine that the diffraction technology of the ring array method cannot be practically applied in the future

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