WO2019214324A1

WO2019214324A1 - Safety inspection system

Info

Publication number: WO2019214324A1
Application number: PCT/CN2019/076609
Authority: WO
Inventors: 于昊; 李营; 王伟珍; 宋全伟; 王东宇; 迟豪杰; 李荐民; 李玉兰; 宗春光; 陈志强; 李元景; 张丽
Original assignee: 清华大学; 同方威视技术股份有限公司
Priority date: 2018-05-09
Filing date: 2019-03-01
Publication date: 2019-11-14
Also published as: CN108732192A; PL435899A1

Abstract

A safety inspection system, which relates to the technical field of safety inspection; the safety inspection system comprises a backscatter scanning device (1) and a support device (2); the support device (2) forms an inspection channel that allows an inspected object (a) to pass therethrough, and the backscatter scanning device (1) is disposed at an upper part of the support device (2) and comprises a backscatter ray source device (11) and a backscatter detecting device (12), the support device (2) adjusting the height of the backscatter scanning device (1). The support device (2) of the safety inspection system may adjust the height of the backscatter scanning device (1) mounted on the support device (2) so as to facilitate adjusting the projection size and opening angle size of a backscattered flying spot according to the height of the inspected object (a) during scanning, and thus the imaging quality of a backscattered image may be effectively improved.

Description

Safety inspection system

Cross-reference to related applications

The disclosure is based on the Chinese application No. 20181043669, filed on May 9, 2018, the disclosure of which is hereby incorporated by reference.

Technical field

The present disclosure relates to the field of security inspection technology, and in particular to a security inspection system.

Background technique

The safety inspection system is a device that scans and inspects objects such as vehicles, containers, and airplanes at customs and airports to obtain images. From the perspective of imaging principles, security inspection systems can be divided into two categories: transmission imaging and backscatter imaging. Among them, backscatter imaging technology uses the Compton scattering effect to image photons reflected by the scanned object. The scatter image is formed by a ray signal scattered by an object of a certain depth in the direction of the detector. Since the Compton scattering of rays in low atomic number substances such as explosives and drugs is stronger, backscatter imaging technology can distinguish materials and highlight organic substances, which have low radiation dose, sensitivity to light materials, and images. Intuitive and other advantages.

Summary of the invention

However, the inventors have recognized that the image quality of the existing backscatter inspection system still needs to be improved.

Therefore, one technical problem to be solved by the present disclosure is to improve the imaging quality of the backscattered image.

In order to solve the above technical problems, the present disclosure provides a security inspection system including a backscatter scanning device and a support device that form an inspection channel that allows a test object to pass through, the backscatter scanning device being disposed at an upper portion of the support device and including The backscattered ray source device and the backscatter detecting device, and the supporting device adjusts the height of the backscatter scanning device.

In some embodiments, the support device includes two support arms on opposite sides of the inspection channel, the backscatter scanning device is coupled between the two support arms and located at an upper portion of the two support arms, both of which are height-adjustable Ground to adjust the height of the backscatter scanning device.

In some embodiments, the support arm includes at least two arm sections arranged in a vertical direction, at least two of which are relatively telescopically sleeved, and the backscatter scanning device is coupled to the upper one of the at least two arm sections .

In some embodiments, the backscatter scanning device further includes a backscattering capsule, the backscattered ray source device and the backscatter detecting device are both disposed inside the backscattering capsule, and the backscattering capsule is coupled between the two support arms and located in two The upper support arm of the support arm.

In some embodiments, the security inspection system further includes a height detecting device for measuring the height of the object before the object passes through the bottom of the backscatter scanning device, and the supporting device adjusts the back according to the detection result of the height detecting device. The height of the scattering scanning device.

In some embodiments, the security inspection system further includes a transmissive scanning device having a transmissive ray source device and a transmissive ray source device disposed at a side of the support device.

In some embodiments, the transmissive ray source device is disposed on one side of the support device, the transmissive detection device includes a first transmissive detecting device and a second transmissive detecting device, wherein: the first transmissive detecting device is disposed at the supporting device and the transmissive ray source The opposite side of the device; the second transmission detecting means is disposed at an upper portion of the supporting device and is arranged offset from the backscatter scanning device in the extending direction of the inspection passage.

In some embodiments, the second transmission detecting device changes height with the backscatter scanning device under the adjustment of the supporting device.

In some embodiments, the support device further includes a transmissive chamber disposed at a side of one of the two support arms on opposite sides of the inspection channel, the transmissive source device disposed in the transmissive chamber, and the support device further Included in the vertical mounting bracket, the vertical mounting bracket and the other of the two supporting arms on opposite sides of the inspection passage are staggered along the extending direction of the inspection passage, and the first transmission detecting device is disposed on the vertical mounting bracket; And, the supporting device further comprises a lateral mounting bracket disposed between the two supporting arms on opposite sides of the inspection passage and located at an upper portion of the two supporting arms, and the second transmission detecting device is disposed between the lateral mounting brackets.

In some embodiments, the support device includes a vertical mount and a lateral mount, the lateral mount and the vertical mount being coplanar.

In some embodiments, the security inspection system further includes a walking wheel disposed at the bottom of the support device.

In the present disclosure, the support device of the security inspection system can adjust the height of the backscatter scanning device mounted on the support device, because it is convenient to adjust the backscattered spot spot projection size and sheet according to the height of the object during scanning. The angular size, therefore, can effectively improve the imaging quality of the backscattered image.

Other features and advantages of the present disclosure will become apparent from the Detailed Description of the Drawing.

DRAWINGS

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present disclosure, and other drawings can be obtained from those skilled in the art without any inventive labor.

Fig. 1 is a schematic perspective view showing a three-dimensional structure of a security inspection system of a first embodiment of the present disclosure.

FIG. 2 is a block diagram showing the structure of the backscatter scanning device of FIG. 1.

Fig. 3 is a schematic view showing the structure of the backscattering device of Fig. 1 when it is adjusted to a lower height by the supporting means.

Figure 4 is a schematic diagram showing the principle of the support device adjusting the backscatter scanning device height to affect the imaging quality of the backscatter device.

Fig. 5 is a schematic perspective view showing a three-dimensional structure of a security inspection system of a second embodiment of the present disclosure.

Fig. 6 is a schematic view showing the structure of the backscattering device of Fig. 5 when it is adjusted to a lower height by the supporting device.

detailed description

The technical solutions in the embodiments of the present disclosure are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present disclosure. It is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of the at least one exemplary embodiment is merely illustrative and is in no way All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without departing from the inventive scope are the scope of the disclosure.

Techniques, methods and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and apparatus should be considered as part of the authorization specification.

In the description of the present disclosure, it is to be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom", etc. indicate the orientation. Or the positional relationship is generally based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the disclosure and the simplification of the description, which does not indicate or imply the indicated device or component. It must be constructed and operated in a specific orientation or in a specific orientation, and thus is not to be construed as limiting the scope of the disclosure; the orientations "inside and outside" refer to the inside and outside of the contour of the components themselves.

In the description of the present disclosure, it is to be understood that the terms "first", "second" and the like are used to define the components only for the purpose of facilitating the distinction between the corresponding components. If not stated otherwise, the above words are not special. The meaning is therefore not to be construed as limiting the scope of the disclosure.

Figures 1-6 illustrate two embodiments of the security inspection system of the present disclosure. Referring to Figures 1-6, the security inspection system provided by the present disclosure includes a backscatter scanning device 1 and a support device 2, the support device 2 forming an inspection channel that allows the object a to pass, and the backscatter scanning device 1 is disposed on the support device 2 The upper portion includes the backscattered ray source device 11 and the backscatter detecting device 12, and the supporting device 2 adjusts the height of the backscatter scanning device 1.

The height of the backscatter scanning device 1 mounted on the support device 2 can be adjusted by arranging the security inspection system as its supporting device 2, so that the backscattered flying spot can be adjusted according to the height of the object a during scanning. The projection size and the opening angle can effectively improve the quality of the image generated by the security inspection system based on the backscatter scanning device 2.

In the present disclosure, the supporting device 2 may adopt a ring structure, and the height of the backscattering scanning device 1 may be realized by changing the ring diameter of the supporting device 2; or the supporting device 2 may also adopt a gantry frame structure by changing the supporting device The height of the two support arms 21 on both sides of the inspection channel is 2 to achieve the height of the backscatter scanning device 1.

Wherein, when the support device 2 adopts the gantry frame structure, in order to adjust the heights of the two support arms 21 of the support device 2 on both sides of the inspection channel, the support arm 21 may be disposed to include at least two arranged in the vertical direction. An arm section, and the at least two arm sections are sleeved relative to each other such that the support arm 21 changes its height by relative expansion and contraction of the arm sections; or the support arm 21 may be arranged to include at least the upper and lower arrangements Two arm sections, and the at least two arm sections are rotatably coupled such that the support arm 21 changes its height by relative rotation of the arm sections.

The security inspection system of the present disclosure will be further described below in conjunction with the first embodiment illustrated in Figures 1-4.

As shown in FIGS. 1-3, in this embodiment, the security inspection system includes a backscatter scanning device 1 and a support device 2, wherein the backscatter scanning device 1 is used to scan the object a based on the Compton scattering effect. The support device 2 is used to support the backscatter scanning device 1 and to adjust the height of the backscatter scanning device 1.

1 and 2, the backscatter scanning device 1 of this embodiment includes a backscattered ray source device 11, a backscatter detecting device 12, and a backscattering capsule 13, and the backscattered ray source device 11 and the backscatter detecting device 12 are both disposed at In the backscattering chamber 13, wherein the backscattered ray source device 11 is configured to emit X-rays; the backscatter detecting device 12 is configured to receive the backscattered rays after the radiation emitted from the backscattered ray source device 11 is irradiated to the object a and The received backscattered rays are converted into electrical signals for recording for use in generating backscattered images, which may employ a detector array structure.

By arranging the backscattering ray source device 11 and the backscattering detecting device 12, the ray can be shielded, the damage caused by the radiant radiation to the human body and the like can be reduced, and the backscattering scanning device 1 is also more convenient in the supporting device. 2 on the installation.

As can be seen from FIG. 1, the support device 2 of this embodiment includes two bases 25 and two support arms 21, wherein the two support arms 21 are spaced apart from each other such that there is a hollow space between them to form a supply. The inspection passage through which the specimen a passes, that is, enables the specimen a to pass between the two; the two bases 25 are respectively disposed at the bottom ends of the two support arms 21, and the bottom surface of the base 25 is larger than the bottom of the support arm 21. The area, therefore, is advantageous for increasing the support stability of the support device 2. It can be seen that the supporting device 2 of the embodiment adopts a gantry frame structure, has a simple structure, is convenient to use, and has low cost.

1 and FIG. 3, in this embodiment, the support arm 21 includes two arm sections arranged in the vertical direction, which are a first arm section 211 and a second arm section 212, respectively, wherein the first arm The bottom end of the joint 211 is connected to the base 25, and the second arm joint 212 is disposed above the first arm joint 211 and sleeved with the first arm joint 211. Thus, the support arm 21 is telescopic and adjustable in height. At the same time, the backscattering capsule 13 is connected between the two support arms 21 and is located above the upper second arm section 212 of the two arm sections. Wherein, the backscattering cabin 13 can be directly connected to the two supporting arms 21, or a cross arm connected to the two supporting arms 21 can be additionally added between the two supporting arms 21, and the backscattering cabin 13 can be disposed on the cross arm. In this way, the backscattering capsule 13 is indirectly connected to the two support arms 21 via the cross arm.

Based on the above arrangement, when the second arm section 212 is expanded and contracted relative to the first arm section 211, the height of the support arm 21 is changed, which can drive the backscatter scanning device 1 to move up and down, changing the height of the backscatter scanning device 1, so that during the inspection process The height of the backscatter scanning device 1 can be adjusted by the supporting device 2 according to the difference of the object a, and the relative height between the backscatter scanning device 1 and the object a can be changed to bring the backscatter scanning device 1 closer to or Keeping away from the object a, this not only helps to expand the scope of the safety inspection system, meets the inspection requirements of more different types of objects, and also improves the quality of backscattered images.

Taking the object a as a vehicle as an example, when the object a is a container truck having a high height, as shown in FIG. 1, the second arm section 212 can be extended relative to the first arm section 211 to increase the support arm. The height of 21 causes the backscatter scanning device 1 to rise to a higher position to prevent the backscatter scanning device 1 from colliding with the container truck due to the height being too low, thereby ensuring that the container truck can smoothly pass through the inspection channel; When the object a is a passenger car with a lower height, if the height of the backscatter scanning device 1 is not adjustable, that is, if the backscatter scanning device 1 is still at a higher height position as shown in FIG. 1, the backscatter scanning device 1 The distance from the top of the passenger car is large. In this case, although the passenger car can pass through the inspection channel smoothly, the backscatter scanning device 1 can also scan the passenger car to generate a backscatter image, but it is found during use. The backscattered image generated at this time is of poor quality, and the principle thereof is explained in conjunction with FIG.

In FIG. 4, the upper and lower planes at the heights h1 and h2, respectively, can be regarded as the tops of different objects a, for example, the plane at the higher position h1 (referred to as the h1 plane) can be regarded as a container truck. At the top, the plane at the lower position h2 (the h2 plane for short) is regarded as the top of the passenger car. If the height of the backscatter scanning device 1 is not adjustable, the h2 plane is more in the height direction than the h1 plane during the inspection. Far from the backscatter scanning device 1, that is, the height of the backscatter scanning device 1 from the h2 plane is greater than the height of the plane h1. On the one hand, the projection of the spot of the ray emitted by the backscattered ray source device 11 on the h2 plane is greater than The projection on the h1 plane results in a lower image resolution. On the other hand, the opening angle α ₂ formed between the backscatter detecting device 12 and the h2 plane is smaller than the opening angle formed between the backscatter detecting device 12 and the h1 plane. α ₁ , resulting in low detection efficiency, which causes the backscatter scanning device 1 to scan the h2 plane with a large difference in height to produce an image with poor quality.

Based on the above research, the difference in the relative distance between the backscatter scanning device 1 and the sample a affects the projection size and the opening angle of the backscattered spot spot, and the image resolution is affected by the projection size and the opening angle of the flying spot. And the detection efficiency, therefore, the difference in the relative distance between the backscatter scanning device 1 and the object a has a large influence on the quality of the backscattered image.

4, when the backscatter scanning device 1 is closer to the object a, the projection of the flying spot is smaller, the image resolution is better, and the angle of the object a facing the backscatter detecting device 12 is higher. Large, high detection efficiency. Therefore, this embodiment can adjust the height of the backscatter scanning device 1 by setting the supporting device 2 so that when the object a is changed from a higher object such as a container truck to a lower object such as a passenger car, the supporting device 2 can be utilized. The backscatter scanning device 1 is lowered to a lower height, for example, from the height shown in FIG. 1 to the height shown in FIG. 3, the projection size of the flying spot is reduced, and the opening angle is increased to improve the security inspection system. The image quality of an inspection image of a lower object such as a passenger car.

In order to more accurately achieve the adjustment of the height of the backscatter scanning device 1, it is also possible to provide a height detecting device for measuring the detected object a before passing through the bottom of the backscatter scanning device 1 in the security inspection system. The height of the sample a is measured, and the supporting device 2 adjusts the height of the backscatter scanning device 1 based on the detection result of the height detecting device. In this way, the security inspection system can more easily and quickly adjust the backscatter scanning device 1 to a more appropriate height, so that the object a can pass smoothly, and a higher quality backscatter image can be obtained.

In addition, in order to facilitate the stabilization of the backscatter scanning device 1 to a suitable height to be adjusted, it is also possible to provide a locking device in the security inspection system for adjusting the backscatter scanning device 1 to a preset height. The continued movement of the backscatter scanning device 1 in the height direction is restricted. The locking device can lock the backscatter scanning device 1 in various manners such as a screw connection manner, a hooking manner or a snapping manner. For example, the locking device can include a threaded connection member and is disposed correspondingly in the height direction on the first arm joint 211. And a plurality of threaded connecting holes on the second arm joint 212 are engaged with the threaded connecting holes of different height positions by the threaded connecting members to maintain the backscatter scanning device 1 at different height positions.

As can be seen from the above, the present disclosure can effectively adjust the height of the backscatter scanning device 1 mounted on the supporting device 2 by setting the security inspection system as its supporting device 2, and can effectively improve the image generated by the security inspection system based on the backscatter scanning device 2. the quality of.

In addition, in order to further enrich the function of the security inspection system of the present disclosure and improve the inspection quality, in the present disclosure, a transmission scanning device 4 may be added to the foregoing security inspection system, so that the security inspection system of the present disclosure can integrate the backscatter scanning device 1 And the transmission scanning device 4, in addition to being able to perform inspection based on backscatter scanning technology, can also perform inspection based on the transmission scanning technology, so that the security inspection system can not only utilize the advantages of backscatter scanning technology, but also achieve lower radiation dose and lighter materials. The sensitive and intuitive inspection process can also take advantage of the advantages of transmission scanning technology to achieve a better penetration and better image quality inspection process.

The transmissive source device 41 of the transmissive scanning device 4 may be disposed at a side of the support device 2. Thus, on the one hand, since the transmissive ray source device 41 and the backscatter ray source device 11 are disposed at different portions of the support device 2, the arrangement of the transmissive scanning device 4 and the backscatter scanning device 1 on the support device 2 is more facilitated, while It is also advantageous to reduce the risk of interference between the two; on the other hand, since the backscatter scanning device 1 is disposed at the upper portion of the supporting device 2, a top viewing angle detection is formed, and the transmissive scanning device 4 is disposed at the side of the supporting device 2 to form a side viewing angle. The detection, therefore, can also obtain inspection images of different viewing angles, thereby achieving more accurate and reliable inspection of the object a.

When the transmissive ray source device 41 is disposed at the side of the support device 2, it may be disposed only on one side of the support device 2, in which case the transmission detecting device for receiving the transmitted ray may simultaneously include the first transmission detecting device And a second transmission detecting device, the first transmission detecting device is disposed on the other side of the supporting device 2 opposite to the transmitted ray source device 41, and the second transmitting detecting device is disposed at the upper portion of the supporting device 2 and with the backscattering scanning device 1 is staggered along the extending direction of the inspection passage so that the transmitted rays can be simultaneously received in two different viewing angle directions, and the overall scanning inspection of the object a is performed more efficiently.

Next, the case where the security inspection system includes both the backscatter scanning device 1 and the transmission scanning device 4 will be further described with reference to the second embodiment shown in Figs. 5-6.

As shown in Figures 5-6, the second embodiment is identical to the first embodiment shown in Figures 1-4 above in that the backscatter scanning device 1 is still disposed on the upper portion of the support device 2, and the support device 2 is also Still adopting a gantry frame structure comprising two support arms 21 on opposite sides of the inspection channel, and the support arm 21 still regulates the backscatter scanning device 1 by the relative expansion and contraction of its first arm segment 211 and second arm segment 212 Height to improve backscattered image quality, but the main difference is that the second embodiment includes a backscattering scanning device 1 and a transmissive scanning device 4, and the transmissive scanning device 4 includes a transmissive ray source device 41, a transmission detecting device and a second transmission detecting device, wherein the transmissive ray source device 41 is disposed in a transmissive chamber 24 mounted on a side (particularly outside) of a support arm 21 for emitting transmitted radiation, which may adopt an electronic straight line a plurality of structural forms such as an accelerator, an inductive accelerator, or an isotope source; the first transmission detecting device is disposed on an opposite side of the transmissive source device 41 and extends along the inspection channel with the other support arm 21 On the vertical mounting frame 22, which is arranged in a staggered manner, a second transmission detecting means is disposed on the lateral mounting frame 23 between the two supporting arms 21 and located on the upper portions of the two supporting arms 21, both for receiving transmitted rays. A detector array structure can be used.

Based on the above arrangement, the security inspection system of the second embodiment includes not only the top view backscatter scanning device 1 but also the side view transmission scanning device 4, so that the security inspection system can provide both backscattering and transmissive scanning modes, and They are distributed in vertical and horizontal views, that is, side view transmission and top view backscatter, which are more abundant in function and more accurate in detection results.

When the safety inspection system is working, according to actual needs, it is possible to select only one of the backscatter scanning device 1 and the transmission scanning device 4 to work, obtain only the top view backscatter image or only obtain the side view transmission image, or select to be scattered. Both the scanning device 1 and the transmissive scanning device 4 operate, and both the top view backscattered image and the side view transmitted image are obtained at the end of the scan. Wherein, when both the scatter scanning device 1 and the transmission scanning device 4 are selected to operate, the backscatter scanning device 1 and the transmission scanning device 4 can be simultaneously unwound to more easily prevent the transmission imaging and the backscatter imaging from interfering with each other.

The transmission scanning device 4 of this embodiment may be configured to have three working modes of a high dose mode, a low dose mode, and a high and low metering switching mode. When the transmission scanning device 4 is operated in the high-dose mode, the radiation dose is large, the transmission effect is better, but the damage to the human body and the like is large, and in this mode, it is preferable to avoid the portion of the test object a such as the cab of the vehicle. In order to reduce the damage of the radiation to the human body and the like, for example, after the transmissive ray source device 41 is passed through the cab of the container truck, the transmissive scanning device 4 is activated to perform transmissive scanning on the container truck, and after the scanning is completed, a portion other than the cab is obtained. The side view transmission image; when the transmission scanning device 4 operates in the low dose mode, the radiation dose is small, the transmission effect is relatively poor, but the human body is safe, and the mode can be used for the object a (such as a container truck or a small Each part of the passenger car, etc. is scanned, and a side view transmission image of the entire object a (such as a whole car) is obtained after the scanning is completed; and when the transmission scanning device 4 operates in the high and low metering switching mode, the inspection can be flexibly and conveniently satisfied. Different requirements for transmission and human safety in different parts of a, for example, when scanning a container truck, you can use low dose first. The cab is scanned, and after the cab passes through the transmitted ray source 41, the transmissive scanning device 4 is switched to the high dose mode, and the remaining parts such as the container other than the cab are scanned, and the scanning ends to obtain the side view of the whole vehicle. Transmission image.

Also, as shown in FIG. 5, in this embodiment, the vertical mount 22 and the lateral mount 23 are disposed in a coplanar manner such that the first transmission detecting means and the second transmission detecting means can be identical to the object a to be inspected Plane imaging. At the same time, the vertical mounting frame 22 and the lateral mounting frame 23 are respectively arranged offset from the support arm 21 and the backscatter scanning device 1 in the extending direction of the inspection channel, so that the transmission detecting device does not affect the expansion and contraction of the support arm 21, nor does it The backscatter scanning device 1 undergoes physical interference and is advantageous in reducing mutual interference between transmitted rays and backscattered rays.

In addition, as can be seen from FIG. 5 and FIG. 6, in this embodiment, the lateral mounting bracket 23 is coupled to the backscattering capsule 13, which enables the lateral mounting bracket 23 to carry the second transmission detecting device located thereon along with the backscatter scanning. The device 1 moves up and down together, that is, enables the second transmission detecting device to change the height together with the backscatter scanning device 1 under the adjustment of the supporting device 2, which facilitates adjusting the second transmission detecting device according to the height of the object a to be detected. The relative height between the objects a is obtained as a transmission image of good quality.

Wherein, the bottom surface of the lateral mounting frame 23 may be disposed flush with the bottom surface of the backscattering cabin 13 in order to more accurately adjust the heights of the two, and more reasonably meet the different requirements of the different inspection objects a for the height of the safety inspection system .

In the above two embodiments, the supporting device 2 is set to be height-adjustable, and the advantages thereof are that it is advantageous for improving image quality, improving the accuracy and reliability of the inspection result, and also facilitating the transition, because after the inspection is finished, It is possible to easily complete the transition without lowering the safety inspection system, and simply lowering the support device 2, for example, lowering the support device 2 to such an extent that the overall height of the safety inspection system is less than the height of the container, ie The three-dimensional size of the safety inspection system can be made smaller than the three-dimensional size of the container for accommodating the safety inspection system, so that the safety inspection system can be transferred into the container through the container truck after the use, or it can be directly lowered. The safety inspection system is placed in the open frame of the chassis or placed directly on the container truck chassis for transfer, so that the overall height of the vehicle after placement does not exceed the vehicle height required by road regulations.

In addition, as can be seen from the comprehensive figures 1-6, in the foregoing two embodiments, the safety inspection system further includes a walking wheel 3 disposed at the bottom of the supporting device 2. Specifically, as shown in FIG. 1-3, in the foregoing first embodiment, two walking wheels 3 are provided at the bottom of each base 25; and as shown in FIG. 5 and FIG. 6, in the foregoing second embodiment, the right side The bottom of the base 25 and the bottom of the transmissive compartment 24 on the left side are respectively provided with two walking wheels 3 and four traveling wheels 3.

By setting the walking wheel 3, the safety inspection system can move by itself, which is not only convenient for the transition, but also because it does not need to be restricted to the chassis exhaust, left rudder, right rudder and other related road regulations as the vehicle-mounted mobile safety inspection system. Therefore, it is more flexible and has a wider range of applications.

Moreover, by setting the walking wheel 3, the security inspection system can realize both the fast inspection scanning mode and the active scanning mode, and the usage mode is more flexible, and can conveniently meet more security inspection requirements. When the fast inspection scan mode is implemented, the walking wheel 3 is made stationary, the safety inspection system is kept stationary, and the object to be inspected is moved, and the scanning inspection process is completed through the inspection channel, thereby realizing a high throughput scanning process; In the active scanning mode, the object a is stationary, and the security inspection system actively moves under the action of the walking wheel 3 to complete the scanning inspection process and obtain a high quality scanned image. In the fast scan mode, since the driver usually drives a container truck or a passenger car to complete the scanning inspection process, in order to reduce the damage of the radiation to the human body, among the container trucks, the transmission scanning device 4 may first adopt a low dose. The mode scans the cab with the driver, and when the cab passes the transmitted ray source 41, the transmissive scanning device 4 can switch to the high dose mode to scan the rest of the container other than the cab, or The transmissive scanning device 4 can also start scanning the remaining parts of the container outside the cab with the high dose mode after the cab is not activated and after the cab passes; for the passenger car, the transmissive scanning device 4 can The low dose mode is used throughout the fast inspection process.

Among them, the walking wheel 3 can be either a track wheel or a universal wheel. When the walking wheel 3 is set as a track wheel, the security inspection system can move on the track. When the walking wheel 3 is set as a universal wheel, the safety inspection system can not only flexibly move, but also can flexibly turn, and does not require civil construction, and is convenient for transition and relocation. When the walking wheel 3 is a universal wheel, an optical or magnetic mark can be set on the ground to further facilitate the walking of the walking wheel 3, so that the movement path of the safety inspection system is more in line with the actual needs of the scanning, thereby obtaining more accurate and reliable inspection. result.

In addition, when the walking wheel 3 is set as a universal wheel, the safety inspection system can flexibly adjust the moving direction during the scanning process, which is also advantageous for more reliably preventing the safety inspection system from colliding with the object a during the movement. Improve usage security.

Moreover, in order to further reduce the risk of collision, an anti-collision detecting device can also be provided in the security inspection system. The collision avoidance detecting device may include an anti-collision sensor disposed at the front end, the rear end, the left and right sides, and/or the inside of the support arm 21 of the security inspection system, such that, during the movement of the security inspection system, if the front end, the rear end, and/or When the anti-collision sensor on the left and right sides and/or the inside of the support arm 21 detects the obstacle, or the object a in the inspection channel collides with the inner wall of the support arm 21, the anti-collision sensor can send a signal to notify the alarm device to issue The alarm is notified and the control device is controlled to control the safety inspection system to automatically stop the movement to prevent the collision from occurring.

Further, as a further improvement of the foregoing embodiments, it is also possible to provide the object information identifying means, such as a license plate identifying means or a box number identifying means, in the security check system, and to check the identified vehicle information or container information. The object information is bound to the scanned image, so that the object a is matched with the scanned image, which facilitates subsequent processing of the record.

In summary, it can be seen that the security inspection system of the present disclosure can obtain a higher quality scanned image, which includes not only a higher quality backscattered image that can highlight organic matter and is easy to find contraband, but also a higher quality. It has a high penetration and high resolution transmission image, and it can also have an active scan mode and a fast scan mode. It can be seen that the security inspection system of the present disclosure integrates the advantages of various inspection systems into one body, and is convenient to use flexibly according to the difference of the inspection object a and the scanning requirements.

The above description is only exemplary embodiments of the present disclosure, and is not intended to limit the disclosure, and any modifications, equivalents, improvements, etc., made within the spirit and principles of the present disclosure should be included in the protection of the present disclosure. Within the scope.

Claims

A security inspection system that includes:

a support device (2) forming an inspection passage allowing the test object (a) to pass; and

a backscatter scanning device (1) disposed at an upper portion of the supporting device (2) and including a backscattered ray source device (11) and a backscatter detecting device (12), and the supporting device (2) adjusts the back The height of the scattering scanning device (1).
A security inspection system according to claim 1, wherein said support means (2) comprises two support arms (21) on opposite sides of said inspection channel, said backscatter scanning means (1) being connected to the Between the two support arms (21) and at the upper part of the two support arms (21), the two support arms (21) are height-adjustably arranged to adjust the backscatter scanning device (1) )the height of.
The security inspection system according to claim 2, wherein said support arm (21) comprises at least two arm sections arranged in a vertical direction, said at least two section sections being telescopically sleeved, said back A scatter scanning device (1) is coupled to the upper of the at least two of the arm segments.
A security inspection system according to claim 2, wherein said backscatter scanning device (1) further comprises a backscattering capsule (13), said backscattered radiation source means (11) and said backscatter detecting means (12) Both are disposed inside the backscatter capsule (13), and the backscatter capsule (13) is connected between the two support arms (21) and located at an upper portion of the two support arms (21).
The security inspection system according to claim 1, wherein said security inspection system further comprises height detecting means for passing said object (a) through said backscatter scanning means (1) The height of the test object (a) is measured before the bottom, and the support device (2) adjusts the height of the backscatter scanning device (1) according to the detection result of the height detecting device.
A security inspection system according to any of claims 1-5, wherein said security inspection system further comprises a transmission scanning device (4) having a transmitted ray source device (41) and a transmission detecting device, said transmissive ray source device (41) is provided at a side of the support device (2).
A security inspection system according to claim 6, wherein said transmitted ray source means (41) is disposed on one side of said support means (2), said transmission detecting means comprising a first transmission detecting means and a second transmission a detecting device, wherein: the first transmission detecting device is disposed on another side of the supporting device (2) opposite to the transmissive source device (41); the second transmissive detecting device is disposed on the support The upper portion of the device (2) is arranged offset from the backscatter scanning device (1) along the direction of extension of the inspection channel.
A security inspection system according to claim 7, wherein said second transmission detecting means changes height with said backscattering scanning means (1) under the adjustment of said supporting means (2).
A security inspection system according to claim 7, wherein said support device (2) further comprises a transmissive compartment (24) disposed on two support arms on opposite sides of said inspection channel a side of one of (21), the transmissive ray source device (41) is disposed in the transmissive chamber (24), and the support device (2) further includes a vertical mounting bracket (22) The other of the vertical mounting brackets (22) and the two supporting arms (21) on opposite sides of the inspection passage are staggered along the extending direction of the inspection passage, and the first transmission detecting device is disposed at The vertical mounting bracket (22); and/or the supporting device (2) further comprises a lateral mounting bracket (23), the lateral mounting bracket (23) being disposed on two opposite sides of the inspection passage Between the support arms (21) and at the upper portion of the two support arms (21), the second transmission detecting means is disposed between the lateral mounts (23).
A security inspection system according to claim 9, wherein said support means (2) comprises said vertical mounting bracket (22) and said lateral mounting bracket (23), said transverse mounting bracket (23) and The vertical mounting brackets (22) are arranged in a coplanar manner.
A security inspection system according to any of claims 1-5, wherein the security inspection system further comprises a walking wheel (3) disposed at the bottom of the support device (2).