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How to distinguish dangerous goods
Today, as economic development becomes more and more developed, people’s living standards improve and their security requirements become higher and higher. At the same time, due to external third world wars, extremists and other factors, domestic airports, railway stations, and mass gathering places Equipped with security equipment is becoming more and more high-end. 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 does this equipment distinguish dangerous objects? The Weisi Dun Xiaobian must start with the principle of the dual-angle security inspection machine.
The double-angle security inspection machine is an electronic device that completes the inspection by using the conveyor belt to send the checked baggage into the X-ray inspection channel. When the baggage enters the X-ray inspection channel, the package detection sensor will be blocked and the detection signal will be sent to the system control part to generate an X-ray trigger signal, and the X-ray source will emit an X-ray beam. The X-ray beam passes through the inspected object on the conveyor belt, X-rays are absorbed by the inspected object, and finally the semiconductor detector installed in the channel is bombarded. The detector converts X-rays into signals. These weak signals are amplified and sent to the signal processing chassis for further processing. These signals are processed and displayed on the display.
“No matter how many layers there are in the bag, X-rays can penetrate and display the contents of the bag layer by layer.†Dangerous objects are identified by different colors. The multi-energy color organics are shown in orange, and the inorganics are shown in blue. Displayed in green, high energy/low energy two energy switching display, high energy display metal, low energy display of non-metal, in the image display system, X-ray sensor L-shaped photodiode array detector (multi-energy optional), 12bit depth, high Penetration display enhances the brightness of the dark areas of the image, allowing objects hidden behind the high-absorbent objects to clearly show low penetrating power. Improves the contrast of low-absorption (easy-to-penetrate) objects, making them easier to penetrate; X The light double-angle security inspection machine is not a decoration, but it actually takes up the work of guarding railway safety. How does the dual-view security checker detect these dangerous items?
1. The image monitoring method The image monitoring method discriminates objects directly from the x-ray image configuration. Therefore, the detected object is not suspicious and depends on the monitor or the image on the display. Unusual objects or irregularities appearing on the display or monitor should be considered suspicious. Items that cannot be accurately identified should also be regarded as suspicious items. They must be carefully investigated and the image location analysis can be performed as needed.
2. Color analysis color analysis method is based on different material information in the x-ray images appear dissimilar colors, and then identify the species. The appearance of various colors on the monitor is a reflection of the density, quality, and quantity of the object. Therefore, the quality of the object can be evaluated based on the depth of the color of the image. Light yellow, generally a single piece of clothing, thin plastic, a small amount of paper color. Orange, usually soap, pan, wood, leather products and other emerging colors. Dark orange, usually a large number of books, paper, renminbi, high-concentration liquids, large bags of rice noodles and so on. Blue is the color of inorganic substances such as copper, iron, and zinc. Thick cables, etc., appear blue and blue. Green is the color of the mixture, stainless steel products, cables, etc. appear light green. Red is the color of impervious objects, mostly heavy metals and thick objects.
3. Recovery judgment method
Items in baggage, because of the different perspectives placed, objects in the X-ray images appear dissimilar shapes, and even deformation, which changed the original appearance. The method of reversing or changing the viewpoint of the baggage in the X-ray system channel can be used to help recover the form.
4. Analytical Hierarchy Process (AHP) investigates overlapping object images, which can be overlapped from the non-overlapping margins of the objects, and then analyzes the colors and shapes of different levels to determine the object shape.
5. Feature Discrimination Any object has its own specific external shape. Security personnel should keep in mind the shape characteristics of various objects on the monitor and then identify what they are. For example, facial cleanser and hair gel show the same color, but there are launch buttons on the hair gel.
Wei Si Dun Technology Co., Ltd. focuses on the field of express logistics and security inspections. It is China's security solution system solution provider. Since its establishment, Wisdom has been adhering to the development strategy of industry-standard security inspections, tailoring the optimal security system for all walks of life. Combining with the characteristics of the express logistics industry, Wei Si Dun New Products - a proprietary intelligent security inspection system with independent intellectual property rights to launch the market, it combines advanced cloud computing technology, to meet the express logistics industry customers for the intelligent operation of the security inspection, traceability, two-way inspection Demand, gaining wide acclaim.