CN103901486B - Human body back scattering safe examination system and its method - Google Patents

Abstract

Disclose a kind of human body back scattering safe examination system and its method.This patent strengthens people's body side surface inspection, had both eliminated possible safety check hidden danger by carrying out various visual angles synchronous scanning to human body, while makes one physical examination and look into speed to be improved.This patent checks people's body side surface potential energy the Checking on effect of object such as blade especially to being close to human body, relatively thin shape etc. is preferable well.

Description

Human body backscatter security inspection system and method thereof

technical field

The technology relates to radiation imaging technology, in particular to a human body backscatter security inspection system and a method thereof, which can eliminate hidden dangers in security inspection and increase the speed of security inspection scanning.

Background technique

Existing X-ray human body backscatter scanning inspection devices adopt the flying-spot scanning method, which scans the front and back of the human body point by point, so that a certain blind area is formed on both sides of the human body, which may cause security loopholes. The current general technical routes include: the X-ray machine and the detector move up and down synchronously for longitudinal scanning, the X-ray machine rotates (or translates), and the detector moves horizontally for scanning. However, no matter which method is used, a plane of the human body is scanned, and the two sides of the human body cannot be inspected well, and the inspection effect on objects that are close to the human body and thinner, such as blades, is poor. Therefore, how to eliminate the hidden danger of security inspection is a problem that we are more concerned about.

Contents of the invention

Aiming at the problem in the prior art that lateral objects close to the human body cannot be recognized, the embodiment of the present invention proposes a human body backscatter security inspection system and its method, which can eliminate hidden dangers in security inspection and increase the speed of security inspection scanning.

In one aspect of the present invention, a method in a human body backscatter security inspection system is proposed, the human body backscatter security inspection system includes a first backscatter scanning device and a second backscatter scanning device arranged at least partially around the object to be inspected , the method includes the steps: the first backscatter scanning device emits an X-ray beam to scan the first side of the human body of the inspected object; the second backscatter scanning device and the first backscatter scanning The device synchronously emits X-ray beams to scan the second side of the human body of the object under inspection, the second side of the human body is adjacent to the first side of the human body.

In another aspect of the present invention, a human body backscatter security inspection system is proposed, including: a first backscatter scanning device and a second backscatter scanning device arranged at least partially around the object to be inspected, wherein the first backscatter The scanning device is configured to emit X-ray beams to scan the first side of the human body of the inspected object; the second backscatter scanning device is configured to emit X-ray beams synchronously with the first backscatter scanning device , scanning the second side of the human body of the inspected object, where the second side of the human body is adjacent to the first side of the human body.

According to the above scheme, multiple viewing angles are adopted to scan synchronously to strengthen the inspection of the side position of the human body, eliminate security loopholes, and increase the inspection speed at the same time.

Description of drawings

The following figures illustrate embodiments of the technology. These figures and embodiments provide some embodiments of the technology in a non-limiting, non-exhaustive manner, in which:

Fig. 1 shows a schematic diagram of a scanning device in a human body backscatter security inspection system according to an embodiment of the present invention;

Figure 2 shows the distribution of X-rays scattered during backscatter inspection;

Figure 3 shows a schematic diagram of a human backscatter security inspection system according to an embodiment of the present invention; and

Fig. 4 shows a schematic diagram of a flying spot forming device in a backscatter scanning device according to an embodiment of the present invention.

Detailed ways

Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described here are only for illustration, not for limiting the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the present invention. In other instances, well-known structures, materials or methods have not been described in detail in order to avoid obscuring the present invention.

Throughout this specification, reference to "one embodiment," "an embodiment," "an example," or "example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in the present invention. In at least one embodiment. Thus, appearances of the phrases "in one embodiment," "in an embodiment," "an example," or "example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, particular features, structures or characteristics may be combined in any suitable combination and/or subcombination in one or more embodiments or examples. In addition, those of ordinary skill in the art should understand that the term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

Aiming at the problem in the prior art that lateral objects close to the human body cannot be identified, embodiments of the present invention propose a human body backscatter security inspection system and a method thereof. The human body backscatter security inspection system includes a first backscatter scanning device and a second backscatter scanning device at least partially arranged around the object to be inspected. In this method, the first backscatter scanning device emits X-ray beams to scan the first side (for example, the left side) of the human body of the object to be inspected. The second backscatter scanning device and the first backscatter scanning device synchronously emit X-ray beams to scan the second side of the human body (for example, the front side) of the object to be inspected, and the second side of the human body is connected to the first side of the human body. adjacent. In another embodiment, the first side may be the front side and the second side may be the right side. In still other embodiments, the first side may be the right side and the second side may be the rear side. In other embodiments, the first side may be the rear side and the second side may be the left side.

In some embodiments, when scanning different sides of the human body, the first backscattering device and the second backscattering device can be configured so that the distance between the emitted X-ray beams is relatively long, thereby reducing the mutual interference between each other. influences. For example, when the upper part of the first side of the human body is scanned along the lateral direction of the human body of the inspected object, the lower part of the second side of the human body is scanned along the lateral direction of the human body of the inspected object. For another example, when the lower part of the first side of the human body is scanned along the lateral direction of the human body of the inspected object, the upper part of the second side of the human body is scanned along the lateral direction of the human body of the inspected object. For another example, when the upper part of the first side of the human body is scanned along the longitudinal direction of the human body of the inspected object, the lower part of the second side of the human body is scanned along the longitudinal direction of the human body of the inspected object. For another example, when the lower part of the first side of the human body is scanned along the longitudinal direction of the human body of the inspected object, the upper part of the second side of the human body is scanned along the longitudinal direction of the human body of the inspected object. In another embodiment, both the scanning of the first side and the scanning of the second side can be performed on the upper or lower part of the human body.

Fig. 1 shows a schematic diagram of a scanning device in a human body backscatter security inspection system according to an embodiment of the present invention. As shown in Figure 1, the scanning device is a common horizontal translation scanning method, including: X-ray machine and beam collimator 1, rotating drum flying spot device 2, backscatter detector 3, inspection interface 5, and signal acquisition The processing device scans the human body 4 . The X-ray machine and the beam collimator 1 and the rotating drum flying spot device 2 can rotate (or translate) coaxially, and the backscatter detector 3 can translate laterally. The flying spot beam scans up and down.

The backscatter detector 3 is relatively close to the human body 4, so that the backscattered back-scattered ray intensity has a great change in the longitudinal and lateral intensity distribution of the human body. As shown in Figure 2, if the backscatter detector is divided into multiple independent Detector, near target point and far target point backscattered detector received signal strengths are very different. At the same time, for two groups of detectors separated by a certain distance, the mutual signal interference can also be ignored. In view of this, multiple sets of scanning devices are set up at a certain space interval for synchronous scanning, and the two sets form a certain angle to realize multi-view synchronous scanning, so that the information of the side of the human body can be fully reflected, and the scanning speed can be accelerated at the same time.

For example, take two scanning devices with an included angle of 30 degrees as an example to discuss in detail, as shown in Figure 3: Unit 1 and Unit 2 form an included angle of 30 degrees. When Unit 1 scans from A to B, Unit 2 just passes from B is scanned to C, and the scanning speed and direction of both sides are consistent, so A and C on both sides of the human body can be well inspected, the two units are separated by a certain distance in space, and the human body is far away from the backscatter detector. Close, so there is less signal interference between the two units. At the same time, the distribution of scattered signal intensity varies greatly in the longitudinal direction of the human body. Multiple separation modules can be made for each unit detector in the longitudinal direction, and the signals can be collected independently.

In some embodiments, when the first unit is scanning the upper part of the human body, the second unit is scanning the lower part of the human body, and each unit only uses the signal of the detector module closer to the scanning point, so that the mutual interference between the signals can be better eliminated .

As an example of a human body backscatter inspection device, the flying spot beam is a discontinuous beam as shown in Figure 4, and there is a beam-free gap time between scanning beam points. The dual viewing angles of the units scan alternately and simultaneously, that is, when one of the units is in beam output, the other unit is in the shielding state, which can better reduce the signal interference between the dual units and dual viewing angles, and realize the simultaneous scanning of dual units and dual viewing angles.

With the solutions of the above embodiments, since adjacent sides are scanned at the same time, the problem of insufficient side scanning in the prior art is eliminated, and the scanning speed is increased at the same time.

The above detailed description has set forth many embodiments of the human backscatter security inspection system and method thereof by using schematic diagrams, flow charts and/or examples. Where such schematic diagrams, flowcharts, and/or examples include one or more functions and/or operations, those skilled in the art will understand that each function and/or operation in such schematic diagrams, flowcharts, or examples may Individually and/or collectively implemented by various structures, hardware, software, firmware, or essentially any combination thereof. In one embodiment, several portions of the subject matter described herein may be implemented in Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Digital Signal Processors (DSPs), or other integrated formats. However, those skilled in the art will recognize that some aspects of the embodiments disclosed herein may be equivalently implemented in whole or in part in an integrated circuit, implemented as one or more Computer programs (e.g., implemented as one or more programs running on one or more computer systems), implemented as one or more programs running on one or more processors (e.g., implemented as One or more programs running on multiple microprocessors), implemented as firmware, or substantially implemented as any combination of the above methods, and those skilled in the art will have the ability to design circuits and/or write software and and/or firmware code capabilities. Furthermore, those skilled in the art will recognize that the mechanisms of the presently disclosed subject matter can be distributed as a variety of forms of program products and that regardless of the particular type of signal-bearing media actually used to carry out the distribution, the subject matter of the presently disclosed Exemplary embodiments are applicable. Examples of signal bearing media include, but are not limited to: recordable-type media such as floppy disks, hard drives, compact discs (CDs), digital versatile discs (DVDs), digital tapes, computer memory, etc.; and transmission-type media such as digital and and/or simulated communication media (eg, fiber optic cables, waveguides, wired communication links, wireless communication links, etc.).

While this invention has been described with reference to a few exemplary embodiments, it is to be understood that the terms which have been used are words of description and illustration, rather than of limitation. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be construed broadly within the spirit and scope of the appended claims. , all changes and modifications falling within the scope of the claims or their equivalents shall be covered by the appended claims.

Claims (7)

1. A method in a human body backscatter security inspection system, the human body backscatter security inspection system comprising a first backscatter scanning device and a second backscatter scanning device at least partially arranged around the object to be inspected, wherein the first backscatter scanning device The scatter scanning device includes a plurality of backscatter detector modules in the longitudinal direction, the second backscatter scanning device includes a plurality of backscatter detector modules in the longitudinal direction, and the method includes the steps of: The first backscatter scanning device emits X-ray beams to scan the first side of the human body of the inspected object, including the front side, the back side, the left side and the right side; The second backscatter scanning device emits X-ray beams, aiming at the second side of the human body front side, rear side, left side and right side of the subject to be inspected, synchronously with the first backscatter scanning device scanning, the second side is adjacent to the first side; Wherein the first backscatter scanning device scans the upper part of the first side of the human body of the inspected object, the second backscatter scanning device scans the lower part of the second side of the human body of the inspected object, and the first backscatter scanning device scans the human body of the inspected object When the first side is lower, the second backscatter scanning device scans the upper part of the second side of the human body of the inspected object. 2. The method according to claim 1, wherein the step of scanning the first side is specifically scanning the upper part of the first side along the transverse direction of the human body of the object under inspection. 3. The method according to claim 2, wherein the step of scanning the second side is specifically scanning the lower part of the second side along the lateral direction of the human body of the inspected object. 4. The method according to claim 1, wherein the step of scanning the first side is specifically scanning the upper part of the first side along the longitudinal direction of the human body of the inspected object. 5. The method according to claim 4, wherein the step of scanning the second side is specifically scanning the lower part of the second side along the longitudinal direction of the human body of the inspected object. 6. The method according to claim 1, wherein during the scanning process, the X-ray output beams of the first backscatter scanning device and the X-ray output beams of the second backscatter scanning device are interleaved in time . 7. A human body backscatter security inspection system, comprising: a first backscatter scanning device and a second backscatter scanning device arranged at least partially around the object to be inspected, wherein the first backscatter scanning device includes multiple A backscatter detector module, the second backscatter scanning device includes a plurality of backscatter detector modules in the longitudinal direction; Wherein the first backscatter scanning device is configured to emit X-ray beams to scan the first side among the front side, back side, left side and right side of the human body of the inspected object; The second backscatter scanning device is configured to emit X-ray beams aimed at the second side of the human body front, rear, left and right sides of the subject to be inspected, and the first backscatter scanning device scanning synchronously, the second side being adjacent to the first side; Wherein the first backscatter scanning device scans the upper part of the first side of the human body of the inspected object, the second backscatter scanning device scans the lower part of the second side of the human body of the inspected object, and the first backscatter scanning device scans the human body of the inspected object When the first side is lower, the second backscatter scanning device scans the upper part of the second side of the human body of the inspected object.