CN110850495A - A static X-ray three-dimensional tomography CT security inspection machine - Google Patents

Abstract

The invention discloses a static X-ray three-dimensional tomography CT security inspection machine, which includes a main body of the security inspection machine and a display device. The main body of the security inspection machine includes a frame and a conveyor belt, and also includes a detection frame, a first X-ray source, a second X-ray source and X-ray detection conversion data line array signal acquisition circuit board, the detection frame is arranged on the rack, the first X-ray source and the second X-ray source are arranged in the rack Above, the X-ray detection and conversion data line array signal acquisition circuit board is arranged in the detection frame, the X-ray detection and conversion data line array signal acquisition circuit board includes a processor, and the detection frame includes an inner ring and an outer ring. and the side of the detection frame, the inner ring and the outer ring are detachable, the outer ring is formed by splicing 4 outer ring components, the angle between the side of the detection frame and the horizontal plane is less than 90° during normal installation, and the three-dimensional imaging quality is High precision, high efficiency in security inspection, and can replace dynamic spiral CT scanning system.

Description

A static X-ray three-dimensional tomography CT security inspection machine

technical field

The invention relates to the field of security inspection equipment, in particular to a static X-ray three-dimensional tomography CT security inspection machine.

Background technique

The work of the security inspection machine is mainly realized by X-rays. It is an electronic device that uses the conveyor belt of the security inspection machine to send the inspected items into the X-ray inspection channel to complete the inspection. The inspected objects enter the X-ray inspection channel through the conveyor belt. Block the detection sensor of the object to be inspected, and the detection signal is sent to the system control part to generate an X-ray trigger signal, which triggers the X-ray source to emit X-ray beams. A fan-shaped X-ray beam passing through the collimator passes through the inspected object on the conveyor belt, the X-ray is absorbed by the inspected object, and finally bombards the dual-energy semiconductor detector installed in the channel. The detector converts the X-rays into signals, and these very weak signals are amplified and sent to the signal processing cabinet for further processing. X-rays are electromagnetic waves that can penetrate opaque objects such as wood, cardboard, and leather. The security inspection machine can display images of different colors on the screen according to the absorption of X-rays by the object. For example, orange represents organic matter, such as food, plastic, etc. ; Books, ceramics, etc. are displayed in green, and metals are displayed in blue. At this time, the security inspector can quickly view the X-ray scanned fluoroscopic image on the display device, and can determine whether the inspected item is an illegal item based on experience.

At present, the scanning speed of X-ray security inspection machines on the market is generally controlled at 0.2 meters per second, and the two-dimensional pictures generated by scanning are displayed on the display, and then observed by the security inspector with the naked eye, mainly based on the personal experience of the security inspector. With prohibited items, the efficiency of manual judgment is low, especially in subway stations or train stations with large crowds, the security inspection efficiency of parcels is low, and the probability of dangerous chemicals and contraband items not being detected is high.

However, in the prior art, because the X-ray security inspection machine currently on the market scans the inspected item, the two-dimensional image generated by the scanning is displayed on the display, and then the security inspector observes with the naked eye, mainly based on the security inspector's personal experience to judge the prohibited items, The two-dimensional picture display makes the efficiency of manual judgment low, the efficiency of parcel security inspection is low, and the probability of contraband not being detected is high.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a static X-ray three-dimensional tomography CT security inspection machine, which is simple in installation, low in hardware processing cost, long in working life, stable and reliable in X-ray data collection, and clear in three-dimensional X-ray images. The three-dimensional imaging quality is high, and the security inspection image judgment efficiency is high. It can realize the automatic image judgment of machine vision software, unattended security inspection function, reduce labor costs, and can replace the dynamic spiral CT scanning system.

In order to solve the above-mentioned technical problems, the technical scheme of the present invention is:

A static X-ray three-dimensional tomography CT security inspection machine includes a main body of the security inspection machine and a display device. The main body of the security inspection machine includes a frame and a conveyor belt, and also includes a detection frame, a first X-ray source, and a second X-ray source. and X-ray detection conversion data line array signal acquisition circuit board, the detection frame is arranged on the frame, the first X-ray source and the second X-ray source are arranged on the frame, the The X-ray detection and conversion data line array signal acquisition circuit board is arranged in the detection frame, the X-ray detection and conversion data line array signal acquisition circuit board includes a processor, and the detection frame includes an inner ring, an outer ring and a side surface of the detection frame , the inner ring and the outer ring are detachable, the outer ring is formed by splicing 4 outer ring components, and the angle between the side of the detection frame and the horizontal plane is less than 90° during normal installation;

Preferably, the angle between the side surface of the detection frame and the horizontal plane during normal installation is 76°˜82°.

Preferably, the outer ring assembly is connected and installed through a U-shaped card, and the U-shaped card is provided with an installation through hole.

Preferably, the inner ring and the outer ring are coaxial, the inner ring is provided with a U-shaped groove along the circumference, and the outer ring is provided with mounting holes.

Preferably, the installation through holes are installed corresponding to the installation holes.

Preferably, the first X-ray source and the second X-ray source are installed at the upper left corner and the lower right corner of the detection frame, respectively, and the first X-ray source illuminates the upper half of the detection frame, The second X-ray source illuminates the lower half circle of the detector frame.

Preferably, the dot spacing of the X-ray detection and conversion data line array signal acquisition circuit board is 0.4 mm or 0.8 mm or 1.575 mm or 2.5 mm or 4 mm.

With the above technical solution, since there are the first X-ray source and the second X-ray source, the upper and lower half circles of the detection frame are respectively irradiated, so that the entire detection frame is irradiated. Obtaining 3D X-ray stereo tomography images, the security inspection machine is simple to install, low in hardware processing costs, long in working life, stable and reliable in X-ray data collection, clear in 3D X-ray images, high in 3D imaging quality, and efficient in security inspection. It can realize automatic image judgment by machine vision software, unattended security inspection function, reduce labor costs, and can replace dynamic spiral CT scanning system.

Description of drawings

1 is a front view of a static X-ray three-dimensional tomography CT security inspection machine of the present invention;

FIG. 2 is a right side view of a static X-ray three-dimensional tomography CT security inspection machine according to the present invention.

Detailed ways

The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help the understanding of the present invention, but do not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in FIG. 1 , a static X-ray three-dimensional tomography CT security inspection machine includes a main body of the security inspection machine and a display device. The main body of the security inspection machine includes a rack 1 and a conveyor belt 2, and the rack 1 is used for installing the security inspection machine. other components, the conveyor belt 2 sends the inspected items into the security inspection area, and then sends them out to the security inspection machine, and also includes a detection frame 5, a first X-ray source 3, a second X-ray source 4 and X-ray detection conversion data Line array signal acquisition circuit board, the detection frame 5 is arranged on the frame 1, the detection frame 5 can be arc-shaped or square, the conveyor belt 2 passes through the detection frame 5, when the security inspection machine is working, the conveyor belt 2 The items that need to be checked will be transported through the detection rack 5, the first X-ray source 3 and the second X-ray source 4 are set on the rack 1, and the X-ray detection conversion data line array signal acquisition circuit The board is arranged in the detection frame 5, the X-ray detection conversion data line array signal acquisition circuit board includes a processor, the detection frame 5 includes an inner ring, an outer ring and a side surface of the detection frame, the inner ring and the outer ring Removable, the outer ring is formed by splicing 4 outer ring components, the angle between the side of the detection frame and the horizontal plane is less than 90° during normal installation, and the static X-ray stereo scanning CT security inspection machine uses a precisely collimated X-ray beam , together with the highly sensitive detectors to perform cross-sectional scans one by one around the inspected items, with the characteristics of fast scanning time and clear images; The current density signal of the 360° X-ray absorption of the inspected items such as luggage and parcels is collected, and after computer image processing, the 3D X-ray stereo tomography images of the inspected articles such as luggage and parcels are generated. The 3D X-ray stereo tomography images are displayed in the On the display device, compared with the two-dimensional X-ray stereoscopic scanning image, the operator of the security inspection machine can identify and judge the contraband and dangerous chemicals more accurately and clearly; the angle between the side of the detection frame and the horizontal plane is 76°~ 82°, the inclined design of the detection frame 5 can stagger the two opposite X-ray sources, which is convenient for the detection frame to receive the rays emitted by the radiation sources; the outer ring assembly is connected and installed by a U-shaped card, and the U-shaped card is installed on the There are installation through holes, which are connected by bolts, and are welded with the U-shaped card on the side of the inner ring of the detection frame; the inner ring and the outer ring are coaxial, and the inner ring is provided with a U-shaped groove along the circumference. The outer ring is provided with installation holes; the installation through holes are installed corresponding to the installation holes; the first X-ray source 3 and the second X-ray source 4 are respectively installed in the upper left corner and the right side of the detection frame 5 In the lower corner, the first X-ray source 3 illuminates the upper half of the detection frame, the second X-ray source 4 illuminates the lower half of the detection frame, the first X-ray source 3 and the second X-ray source 4 illuminate the lower half of the detection frame. The X-ray source 4 irradiates the entire detection frame 5 together; the point spacing of the X-ray detection conversion data line array signal acquisition circuit board is 0.4mm or 0.8mm or 1.575mm or 2.5mm or 4mm, and the X-ray detection conversion data The dot pitch of the line array signal acquisition circuit board can be one of the above values.

The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions and alterations to these embodiments still fall within the protection scope of the present invention.

Claims (7)

1. The utility model provides a static three-dimensional tomography CT security check machine of X-ray, includes security check machine main part and display device, the security check machine main part includes frame and conveyer belt, its characterized in that: still survey conversion data line array signal acquisition circuit board including detection frame, first X ray source, second X ray source and X-ray, it sets up to survey the frame in the frame to survey the frame, first X ray source and second X ray source set up in the frame, X-ray surveys conversion data line array signal acquisition circuit board and sets up in the detection frame, X-ray surveys conversion data line array signal acquisition circuit board and includes the treater, survey the frame and include inner circle, outer lane and survey the frame side, inner circle and outer lane can be dismantled, the outer lane is formed by 4 outer lane subassemblies concatenation, it is less than 90 with the contained angle of horizontal plane to survey the frame side when normal installation.

2. A static X-ray stereotomography CT security machine according to claim 1, characterized in that: and the included angle between the side surface of the detection frame and the horizontal plane is 76-82 degrees when the side surface of the detection frame is normally installed.

3. A static X-ray stereotomography CT security machine according to claim 1, characterized in that: the outer ring assembly is connected and installed through a U-shaped card, and the U-shaped card is provided with an installation through hole.

4. A static X-ray stereotomography CT security machine according to claim 1, characterized in that: the inner ring and the outer ring are coaxial, the inner ring is provided with a U-shaped groove along a circle of the circumference, and the outer ring is provided with a mounting hole.

5. A static CT security machine according to claims 3 and 4, characterized in that: the mounting through hole and the mounting hole are correspondingly mounted.

6. A static X-ray stereotomography CT security machine according to claim 1, characterized in that: the first X-ray source and the second X-ray source are respectively installed at the upper left corner and the lower right corner of the detection frame, the first X-ray source irradiates the upper half circle of the detection frame, and the second X-ray source irradiates the lower half circle of the detection frame.

7. A static X-ray stereotomography CT security machine according to claim 1, characterized in that: the dot spacing of the X-ray detection conversion data line array signal acquisition circuit board is 0.4mm or 0.8mm or 1.575mm or 2.5mm or 4 mm.

Images