How does X-ray baggage scanner work?

How does X-ray baggage scanner work?

The X-ray baggage scanner is an electronic device that inspects every baggage in a conveyor belt when it enters into the X-ray inspection channel. Have you ever wondered how X-ray baggage scanner at security screening sees through your bag? The purpose of X-ray baggage scanner is to prevent dangerous goods from entering aircraft and to ensure safety. Therefore, all passengers must walk through a people screening before entering the gate area, and baggage are scanned with an X-ray baggage scanner.  

l Why choose X-ray to make of X-ray baggage scanner?

l How does X-ray baggage scanner work?

l What is the difference between single view X-ray baggage scanner and double view X-ray baggage scanner?

Why choose X-ray to make of X-ray baggage scanner?

Before we dive into how X-ray baggage scanner works, we need to take a step back and discuss the concept of vision in general. When you look at someone, you don’t see them per say, rather you see a series of light waves that the human eye can process, which take the form of your acquaintance. These light waves make up one part of the electromagnetic spectrum. In addition to visible light waves, the spectrum contains invisible waves such as, radio waves, microwaves, infrared waves, and importantly X-rays.

X-rays of X-ray baggage scanner have peculiar properties. When generated, X-ray can penetrate human tissue. However, X-rays cannot penetrate human bones, and other matters. Therefore, when a human gets exposed to an X-ray, the X-Ray will pass through his flesh but not his bone, leaving a negative impression on the film.

An X-ray baggage scanner doesn’t only penetrate human skin leaving a negative of the bone matter, but it can also penetrate other items such as bags, computers, and jackets, leaving a negative of the items located inside those cases.

How does X-ray baggage scanner work?

When the baggage enters the X-ray baggage scanner, it blocks the package detection sensor and sends the detection signal to the system control section to generate an X-ray trigger signal, emitting the X-ray from the source. As the X-ray beam penetrates every target object on the conveyor belt of X-ray baggage scanner, the radiation gets absorbed by the object, followed by the bombardment of the semiconductor detector mounted in the channel. The semiconductor detector converts the X-rays into signals, getting amplified, and transfers to the signal processing frame for more processing. These signals are finally processed and then displayed on the screen. Even if there are many layers in the baggage, X-rays can penetrate and show the contents of the baggage layer by layer.

A conveyor belt transfers each item towards X-ray baggage scanner. X-rays are electromagnetic waves with high energy, compared to light. Hence, they can penetrate through any material. The X-ray baggage scanner used in airports is usually based on a dual view X-ray system. This system has one X-ray source emitting X-rays in the range of 140 to 160kilovolt peak. KVP denotes the quantity of penetration an X-ray makes. The higher the KVP, the further will be the penetrating power of X-rays. After passing through the items under X-rays, the images are captured by a detector. This detector then transfers the X-rays onto a filter, which blocks the lower-energy X-rays. The resultant high-energy X-rays hit the second detector.

What is the difference between single view X-ray baggage scanner and double view X-ray baggage scanner?

First of all, the size of the detection channel of single view and double view X-ray baggage scanners is the same, as well as the technical principle of detection. X-rays penetrate the scanned object and then display the shape and color of the object.

The first difference is that the core X-ray source is different. Single view X-ray baggage scanner has a ray power of 100KV, and double view X-ray baggage scanner is 160KV, which also represents the difference in penetration. The single view X-ray baggage scanner can only penetrate 20 to 30mm stainless steel plates, while the double view X-ray baggage scanner can penetrate stainless steel plates up to 30 to 40mm.

The second difference is based on the difference of the X-light source, the imaging angle and method are different. The single view X-ray baggage scanner is single-view imaging. Single-view X-ray imaging can only be imaged by different attenuation of rays, which cannot distinguish the difference in density. Therefore, the displayed image color is not so rich and obvious. The double view X-ray baggage scanner is dual-energy imaging. The pictures displayed are richer in color with a stronger sense of layering. The distinction between organics, in-organics, and mixtures is clearer. The spectrum produced by dual-energy X-rays has two bands with two central values respectively. In a single view, there is only one band and one center value.

Learn more something about X-ray baggage scanner can know how X-ray baggage scanner works and the difference between single view and double view X-ray baggage scanner If you want to buy good X-ray baggage scanner with reasonable price, Shanghai Eastimage Equipment CO., LTD. is your best choice. Whether from quality or price, or delivery time, we can help customers to open up a further and larger market. We have all types of different X-ray baggage scanners and if you have any questions, you can contact us or search us online.