Radiation device and radiation inspection system

Abstract

The invention discloses a radiation device and a radiation inspection system. The radiation device comprises a scanning device and an attenuating device, wherein the scanning device is used for emitting scanning ray beams to a detection area, the attenuating device has multiple work modes, under the different work modes, intensities of the different-part scanning ray beams emitted by the scanning device are attenuated by the attenuating device, and an absorption close rate of the scanning ray beams after attenuation incident to a corresponding part of a detected object of a detection area is made to be lower than preset threshold. The radiation device is advantaged in that on the condition a detection avoidance portion is guaranteed not to subject to high strength radiation, and normal detection on a non-detection avoidance portion of the detected object is not influenced.

Description

technical field [0001] The invention relates to the field of radiation detection, in particular to a radiation device and a radiation inspection system. Background technique [0002] Vehicle inspection systems based on radiation detection and imaging technology are widely used in customs, airports, ports, stations and other logistics places, as well as municipal buildings and other important national places. The purpose of application has also gradually expanded from the danger inspection and smuggling inspection of large container vehicles to the anti-terrorism security inspection of small and medium passenger vehicles and even human bodies. Among them, the safety inspection system for passenger vehicles is divided into a dragging and conveying scanning method and a driving and passing scanning method. [0003] In the vehicle transport scanning mode, when the inspected vehicle reaches a specific position, the driver and passengers need to get off the vehicle, and the drive...

AI Technical Summary

Problems solved by technology

[0006] Although this method can meet the detection requirements to a certain extent, it requires the use of multi-energy or multi-dose rate radiation sources, or the use of multi-ray sources, which is more complex and costly

Moreover, when scanning in low dose rate mode, it is easy to cause missed detection of non-personnel areas in the vehicle

For example, the driver's cab generally includes the main driver's cab and the auxiliary driver's cab. In the case that only the main driver's cab has personnel, when the driver's cab passes the detection area, since all the rays scanned at this time are low-dose-rate rays, it is impossible to detect Accurate detection of the passenger cab in the personnel area, resulting in missed detection

Furthermore, even if the scan of the drive-through vehicle is realized by switching the energy state, it cannot fully guarantee that the radiation absorbed by the occupants of the vehicle is within a safe range

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