Security screening device capable of detecting and locating dangerous objects by using radiation

A security screening device, comprising:

• a radiation generator configured to produce an X-ray and neutron radiation and irradiate the X-ray and the neutron radiation toward an inspection object;
• an inspection object transfer unit configured to change a position of the inspection object;
• a shielding unit that is installed along a propagation path of the X-ray and the neutron radiation and selectively allows the X-ray and the neutron radiation to pass therethrough to prevent interference between the X-ray and the neutron radiation;
• a radiation detector that is located at an opposite side of the radiation generator with the inspection object interposed therebetween and is configured to detect the X-ray and the neutron radiation that pass through the inspection object;
• and
• a gamma ray detector that is installed adjacent to the inspection object and is configured to detect a gamma signal generated from the inspection object,
• wherein the shielding unit includes:
• an X-ray shielding part adjacent to a front side of the neutron radiation detection part to absorb an X-ray;
• and
• a neutron radiation shielding part vertically disposed with respect to the X-ray shielding part and adjacent to a front side of the X-ray detection part to shield neutron radiation.

A security screening device, comprising:

• a radiation generator configured to produce an X-ray and neutron radiation and irradiate the X-ray and the neutron radiation toward an inspection object;
• an inspection object transfer unit configured to change a position of the inspection object;
• a radiation detector configured to detect an X-ray and neutron radiation passed through the inspection object;
• and
• a gamma ray detector that is installed adjacent to the inspection object and is configured to detect a gamma signal generated from the inspection object;
• wherein the radiation detector obtains image information of the inspection object using radiation information detected from the X-ray and the neutron radiation passed through the inspection object, and
• wherein the gamma ray detector analyzes a detected gamma ray to analyze the inspection object, and identifies a location of the inspection object from the image information,
• wherein the X-ray and the neutron radiation are alternately produced with a predetermined time difference by the radiation generator to be irradiated toward the inspection object,
• the radiation generator includes:
• an electron gun configured to produce an electron beam;
• an electron accelerator that is connected to the electron gun and is configured to accelerate the electron beam generated by the electron gun;
• and
• a target module that is connected to the electron accelerator and is configured to generate radiation by being irradiated with the electron beam accelerated by the electron accelerator,
• wherein the target module includes:
• a housing having one open end and provided therein with a vacuum chamber;
• an inner case having a cylindrical shape that protrudes toward the vacuum chamber to be installed inside the housing and including an electron beam inlet hole formed on a front portion thereof so as to allow the electron beam to be incident toward the housing;
• a cover plate fixedly installed on the housing to cover the open one end of the housing;
• a driving part including a rotating shaft installed through the cover plate and the inner case, and a motor configured to rotate the rotating shaft;
• and
• a radiation generating target that is coupled to the rotating shaft to rotate in one direction and is configured to produce radiation of different energies as the incident electron beam passes therethrough.