Security check machine prohibited items automatic identification method

Abstract

The invention relates to the field of security equipment, in particular to a method for controlling a security inspection machine. A method for automatic identification of contraband in a security inspection machine, establishing a database, irradiating dangerous substance samples vertically with X-rays emitted by an X-ray emitter, and using an X-ray detector to collect the ray intensity curves of each dangerous substance sample at a scattering angle of 20° or less , compare and match the radiation intensity curve of the inspected object with the radiation intensity curve in the database, if the match is successful, an alarm will be issued and the corresponding dangerous substance samples will be listed according to the successfully matched radiation intensity curve. The present invention utilizes the characteristic that the scattering rates of various substances are quite different under the low scattering angle of X-rays, and the characteristics are obvious to find out dangerous substances, and automatically alarm to remind the security personnel, which can ensure the accuracy of the security inspection and avoid the failure caused by the security personnel's dereliction of duty. missed detection.

Description

technical field [0001] The invention relates to the field of security equipment, in particular to a method for controlling a security inspection machine. Background technique [0002] X-rays have high penetrating power and can pass through many substances that are opaque to visible light, so they are widely used in quality inspections, human inspections and security scans; traditional X-ray security inspections are based on the absorption of X-rays by substances According to the difference, this method can clearly obtain the outline of the metal substance. After applying the dual-energy X-ray inspection method, the effective atomic number of the detected object can also be detected. Through the effective atomic number, various substances can be separated to a certain extent. Separate identification, and then find some dangerous goods with low atomic number, but it is impossible to distinguish the effective atomic number close to living organic matter from plastic explosives ...

AI Technical Summary

Problems solved by technology

[0002] X-rays have high penetrating power and can pass through many substances that are opaque to visible light, so they are widely used in quality inspections, human inspections and security scans; traditional X-ray security inspections are based on the absorption of X-rays by substances According to the difference, this method can clearly obtain the outline of the metal substance. After applying the dual-energy X-ray inspection method, the effective atomic number of the detected object can also be detected. Through the effective atomic number, various substances can be separated to a certain extent. Separate identification, and then find some dangerous goods with low atomic number, but it is impossible to distinguish the effective atomic number close to living organic matter from plastic explosives and drugs. With the wide application of plastic products, it is impossible to use similar signals as suspected contraband. Capable of X-ray inspection method unpacking inspection

[0003] In addition, when several items are closely overlapped, the effective atomic number information detected by the dual-energy X-ray inspection method is an equivalent result, so that dangerous articles can fool the inspection equipment. The visual inspection of the item pattern is highly dependent on the staff itself, and it is a security inspection method with poor stability. Therefore, a more reliable security inspection method is needed.