Security check machine prohibited items automatic identification method

Abstract

The invention relates to the security equipment field, especially a security check machine control method. The security check machine prohibited items automatic identification method comprises setting up a database; employing an X ray emitter to emit X ray to vertically irradiate dangerous substance samples; utilizing an X ray detector to collect the ray intensity curve of each dangerous substance sample under the scattering angle less than 20 DEG; matching the ray intensity curve of an inspected item with ray intensity curves in the database; and if matching is successful, giving an alarm and listing corresponding dangerous substance samples according to a successfully matched ray intensity curve. Under X ray low scattering angles, substance scattering rates are strikingly different and characteristics are obvious; according to the feature, the method finds dangerous substances, and automatically gives an alarm to prompt security check personnel, thereby ensuring security check accuracy, and meanwhile avoiding leak detection caused by neglect of duty of the security check personnel.

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.