Security inspection machine and cargo detection method

Abstract

The invention provides a security inspection machine and a cargo detection method. The security inspection machine comprises a conveying device, a ray generating device and a ray receiving device. A scanning area located in the conveying device is formed between the ray generating device and the ray receiving device. The security inspection machine further comprises a detection device which is located on the side, relatively close to the receiving end of the conveying device, of the ray generating device and used for collecting position information and graphic information of cargoes, and a transillumination adjusting device which comprises a light transmission assembly and an adjusting assembly, the light transmission assembly comprises a plurality of light transmission areas, the adjusting assembly controls each light transmission area to be independently opened and closed according to the position information and the graphic information so as to change the irradiation range of rays allowed to pass through by the light transmission assembly. The cargo detection method comprises the following steps that the detection device collects the position information and graphic information of the cargoes; the conveying device conveys the cargoes to a scanning area; and the transillumination adjusting device controls opening and closing of each light transmission area according to the position information and the graphic information, so that rays passing through the light transmission assembly cover the cargoes.

Description

technical field [0001] The invention relates to the technical field of security inspection, in particular to a security inspection machine and a cargo inspection method. Background technique [0002] The security inspection machine is a device that uses X-rays to detect goods. Its principle is based on the fact that X-rays have different degrees of energy intensity attenuation after penetrating different substances. The energy intensity signal of the transmitted radiation is obtained through the ray receiving device, and finally the energy intensity signal is transformed. for the image signal. However, X-rays are highly radioactive. In practical applications, the single-check radiation dose of the security inspection machine and the surrounding radiation dose equivalent rate must be reduced to reduce the damage to human health caused by X-rays. [0003] In order to ensure the integrity and clarity of the image of the goods, most of the existing security inspection machines ...

AI Technical Summary

Problems solved by technology

However, most of the goods passing through the security inspection channel cannot completely occupy the security inspection channel, which means that a large part of X-rays will not participate in the transillumination scanning and imaging of the goods, thus generating a large amount of redundant radiation

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