Prohibited article detection method and device

Abstract

The invention discloses a method and device for detecting contraband articles, comprising: collecting absorption spectrum data of articles to be inspected with a set content; Absorption spectrum data; for each kind of interference sample, for each content ratio set in advance, according to the absorption spectrum data of the interference sample of the content ratio, the absorption spectrum data of the collected item to be inspected is decomposed, and the The de-interference absorption spectrum data of the inspected item under the interference sample of the content ratio; Compare the de-interference absorption spectrum data with the absorption spectrum data of the standard product of the prohibited item with a set content, and judge whether the item to be inspected is the prohibited item according to the comparison result. By applying the present invention, it can be detected whether the item to be checked containing the interfering substance is a prohibited item.

Description

technical field [0001] The invention relates to the field of spectroscopy, in particular to a method and device for detecting contraband items. Background technique [0002] At present, the detection of prohibited items has been widely used in airports, customs, stations, ports, nuclear power plants, government agencies, postal inspection centers, courts, embassies and other places to detect prohibited items carried by people or in luggage , so as to ensure safety. [0003] An existing detection method for prohibited items is: use X-rays to irradiate the measured object, and display the shape and outline of the measured object according to the principle of X-ray transmission, and display the measured objects with different densities in different colors , for example, organic substances are displayed in orange, inorganic substances are displayed in blue, and mixtures are displayed in green. Detectors can easily identify metal prohibited items such as guns and knives accordi...

AI Technical Summary

Problems solved by technology

However, in practical work, common substances that have no characteristic absorption in the terahertz frequency band are often encountered. Some of these substances are mixed with prohibited items, and some are used as packaging materials to cover prohibited items, which interferes with the detection of items to be inspected. May lead to failure to detect whether the item to be inspected is a prohibited item

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