X-ray security inspection system

----------------------------The principle of security inspection machine----------------------------

The Spring Festival of the Year of the Dragon is approaching, and everyone is embarking on a journey back home. College students who have completed their final exams have dragged their luggage and boarded the high-speed rail plane first, packing their thick clothes and quilts in large and small packages and mailing them home.

Inspectors at high-speed rail stations, airports, bus stations, and logistics express delivery are responsible for inspecting these luggage packages, that is, using X-ray security inspection equipment (also known as: security inspection machines, X-ray machines, etc.)

The performance of security inspection equipment has improved a lot compared to previous years. The security X-ray machine is a must-have equipment for the security inspection channel. How this equipment distinguishes explosives, drugs, guns, knives and other dangerous items starts with the principle of the security inspection machine.

The security inspection machine is an electronic device that uses a conveyor belt to send the checked baggage into the X-ray inspection channel to complete the inspection.

When baggage enters the X-ray inspection channel, it will block the package detection sensor, and the detection signal is sent to the system control part to generate an X-ray trigger signal. After triggering, the ray source emits an X-ray beam.

The X-ray beam passes through the inspected items on the conveyor belt. The X-rays are absorbed by the inspected items and then captured by the detector in the channel. The detector converts X-rays into signals and sends them to the signal processing end for further analysis, and finally generates structural images to display the picture.

So how does the security inspection machine detect these dangerous items?

1. image surveillance law

The image monitoring method directly identifies objects from the configuration of X-ray fluoroscopic images. Therefore, whether the inspected object is suspicious depends on the image on the monitor or display. Unusual or strange objects appearing on the display or monitor should be regarded as suspicious items. Those items that cannot be accurately identified should also be regarded as suspicious items and need to be carefully investigated, and the images can be located and analyzed as needed.

2. color analysis

The color analysis method is based on the appearance of different colors in x-ray images by different material materials, and then the identification of material types is carried out. The various colors that appear on the monitor reflect the density, quality and quantity of objects. Therefore, the quality of objects can be evaluated based on the depth of the image color.

Light yellow is usually the color of a single piece of clothing, thin plastic, and a small amount of paper.

Orange is generally the color of soap, soap, explosives, drugs, wood, leather products, etc.

Dark orange color usually indicates a large number of books, papers, RMB, high-concentration liquids, large bags of rice and noodles, etc.

Blue is the color of inorganic substances such as copper, iron, and zinc. Thick cables, stun guns, bullets, grooved bullets, guns, and knives appear in different shades of blue.

Green is the color of mixtures, and stainless steel products, cables, etc. appear in different shades of green. Red is the color that appears on impenetrable objects, mostly heavy metals and thick objects.

3． Restoration Judgment

Due to the different placement angles of the items in the luggage, the objects will appear in different shapes under the X-ray image, and may even deform, even changing their original appearance. You can restore the original shape by repositioning or changing the angle of the baggage in the X-ray system channel.

4. analytic hierarchy process

Observe overlapping object images, and determine the true shape of the object through the analysis of different levels of color and shape.

5. feature discrimination method

Any object has its specific external shape. Security personnel should keep in mind the shape characteristics of various objects on the monitor and then determine what kind of objects they are. For example, facial cleanser and hairspray have the same color, but there is a start button on the hairspray.

"Smart +" upgrade, the emergence and use of AI recognition security inspection machines

With the recovery and growth of passenger travel rates and express delivery business volume after the epidemic is lifted, the efficiency of baggage and parcel transit security inspections is a new issue.

A real case is that at a high-speed rail station in a city in Guangdong, a security officer inspected a woman’s luggage bag through an X-ray security inspection machine and initially judged from the image that she was hiding a knife, and asked the woman to open the bag. It turned out that it only contained the woman’s underwear. , after re-packing and inspection, it was confirmed that there were no dangerous items. Afterwards, the woman complained to the staff, believing that he deliberately made things difficult and opened her package in public, which violated her privacy and affected her ride time. Finally, after processing, it was found that the staff had not been on the job recently and had insufficient experience in recognizing images, causing mistakes.

In another case, at a logistics transfer station in a city in Hunan, the person in charge recruited temporary workers to screen parcels during the National Day holiday. However, identifying contraband requires experienced professionals, which resulted in missed inspections and serious consequences. Security Risk.

Intelligent security inspection can further strengthen accurate identification, speed up screening, improve security inspection efficiency, speed up the passage time at the security inspection entrance, effectively prevent security inspection conflicts, block prohibited items from flowing into delivery channels, and improve the security management and control capabilities of the delivery network.

The intelligent security inspection machine can quickly and accurately detect organic matter, inorganic matter and mixtures (or light metals) in various packages based on the effective atomic number of the inspected object. It uses self-developed deep learning algorithms and can intelligently identify 35 major categories and 51 sub-categories of prohibited items. and promptly remind security personnel of the type of contraband. The identification rate reaches 99% for express items containing dangerous goods such as knives, lithium batteries, guns, scissors, handcuffs, swing sticks, spray cans, lighters, fireworks, and liquids.

The put into use of intelligent security inspection machines has realized the "intelligent initial screening, manual re-inspection" mode. Security inspectors can further review based on the intelligent recognition and early warning results of the security inspection machines, effectively shortening the package inspection time and improving the efficiency of security inspection work.

AI intelligent identification of X-ray safety inspection equipment

ZOAN GAOKE is one professional security equipment manufacturer,which was established in 2005,the total business space is 3000m²,with more than 200 employees.For years we devoted to public security,anti-terrorism equipment research,development,production,marketing and service,and we offer one-stop security solution to our clients from all the world.

The company have 6 series production lines,such as Under Vehicle Surveillance System,X-ray Baggage scanner,explosives and drug detection equipment,liquid&gas detector,metal detection equipment and etc.All the products have passed CE/FCC/CCC/ROHS Certificates,and have been exported to more than 50 countries and regions.The products is widely used in large-scale events,meetings,exhibitions,political and legal departments,highways,ports and other places.