CN115144915A

CN115144915A - Auxiliary frame for multifunctional vehicle-mounted security check system and multifunctional vehicle-mounted security check system

Info

Publication number: CN115144915A
Application number: CN202110344025.3A
Authority: CN
Inventors: 张丽; 陈志强; 程熠; 黄清萍; 梁晋宁; 洪明志; 宋全伟
Original assignee: Tsinghua University; Nuctech Co Ltd
Current assignee: Tsinghua University; Nuctech Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2022-10-04
Also published as: WO2022206111A1

Abstract

The application provides a sub vehicle frame and multi-function vehicle carries safety inspection system for multi-function vehicle carries safety inspection system. The sub vehicle frame is used for installing the girder in order to support the cabin body of multi-function vehicle-mounted security inspection system, and the girder is located before the rear end of rear wheel on vertical, wherein, the sub vehicle frame includes: a front frame; a middle connecting part; and a rear frame, wherein the front frame, the middle connecting portion and the rear frame are mechanically connected together or integrally formed in sequence in a longitudinal direction, the front frame and/or the middle connecting portion are mechanically connected to the vehicle side member, and the rear frame is lower than the front frame and the middle frame in a vertical direction to hang downward from the vehicle side member, so that the entire sub-frame assumes a sunk structure.

Description

Auxiliary frame for multifunctional vehicle-mounted security check system and multifunctional vehicle-mounted security check system

Technical Field

The utility model relates to a multi-function vehicle carries security check system, especially relates to multi-function vehicle carries security check system's formula of sinking sub vehicle frame structure.

Background

The traditional security inspection article machine can only obtain a transmission two-dimensional image of an inspected object, and due to the overlapping of various substances in a case, drugs/explosives mixed in different substances are accurately detected, and particularly, the drugs/explosives are difficult to identify from organic matters. In addition, the traditional security inspection article machine can only obtain perspective images along the ray direction, the images of the same article at different placing angles can be different, and when contraband articles are placed at a specific angle, the contraband articles can be ignored by a diagnostician. For the above reasons, while the traditional security inspection machine is used for inspection, unpacking inspection is still required, including random spot inspection of the unsuspecting luggage and parcels in a certain proportion, which brings about little pressure on inspection. In addition, the real state of the interior of the object cannot be reflected on the perspective two-dimensional image, if an interlayer condition exists, the object needs to be destructively disassembled, and the inspection work is also risked due to the condition. The vehicle-mounted article machine security inspection system developed based on the traditional security inspection article machine also has the defects. Most of the existing mobile safety detection devices are single detection devices, namely only object safety detection devices or only human body safety detection devices.

In the security check industry, the single vehicle-mounted article security check system and the single vehicle-mounted human body security check system have mature products at present, but the configuration of two types of equipment for the above conditions is not convenient. Therefore, the vehicle-mounted equipment capable of comprehensively checking human bodies, articles and the like has wide application prospect, and the checking content of the vehicle-mounted equipment comprises various contraband articles such as explosives, drugs and the like. The design requirement of the vehicle-mounted equipment conforms to various human engineering, and the checked person and the checked article can be conveniently checked.

Disclosure of Invention

An object of the present disclosure is to solve at least one aspect of the above problems and disadvantages in the related art.

Embodiments of the present disclosure provide a subframe for a multi-function vehicle security inspection system, the subframe for mounting to a vehicle frame to support a cabin of the multi-function vehicle security inspection system,

the vehicle frame is located longitudinally forward of the rear ends of the rear wheels,

the subframe includes: a front frame; a middle connecting part; and a rear frame, and a rear portion frame,

wherein the front frame, the middle connecting portion and the rear frame are mechanically connected together or integrally formed in sequence in a longitudinal direction, the front frame and/or the middle connecting portion are mechanically connected to the vehicle body frame, and the rear frame is lower than the front frame and the middle frame in a vertical direction to hang downward from the vehicle body frame, so that the entire sub-frame assumes a sunk structure.

In some embodiments, the front frame includes at least two parallel frame bars extending in a longitudinal direction perpendicular to the middle connection.

In some embodiments, the frame bar comprises two frame bars.

In some embodiments, the frame bars span in the lateral direction less than the lateral width of the mid-connection.

In some embodiments, between the parallel extending frame bars, a plurality of transversely extending reinforcing cross bars are provided.

In some embodiments, the subframe is provided with a plurality of threading holes, and the threading holes are arranged in the reinforcing cross bars and/or the frame strips.

In some embodiments, a cantilever projecting laterally towards both sides is provided at an end of the frame bar remote from the middle connecting portion, the cantilever having a lateral width larger than the lateral span of the at least two frame bars.

In some embodiments, the rear frame includes two frame bars extending from both lateral ends of the middle connecting portion.

In some embodiments, the rear frame is configured to mount a CT article inspection device.

In some embodiments, each frame strip of the back frame includes a first portion and a second portion, the two portions forming a generally L-shape.

In some embodiments, the first portion extends vertically downwards from its lateral ends perpendicular to the middle connecting portion, the vertical extension height of the first portion being designed such that its height above the ground is adapted to the height at which the checked person places luggage; and

the second portion extends rearward in the longitudinal direction from a vertically lower end of the first portion.

The embodiment of the present disclosure further provides a multi-function vehicle mounted security inspection system, including:

the subframe of any preceding embodiment; and

the auxiliary frame is arranged on a vehicle girder of the vehicle.

Drawings

FIG. 1 is a schematic diagram of an on-board security system according to one embodiment of the present disclosure.

FIG. 2 is an exemplary security flow performed using the in-vehicle security system of FIG. 1, according to one embodiment of the present disclosure.

FIG. 3 is an exemplary security flow performed using the in-vehicle security system of FIG. 1, according to another embodiment of the present disclosure.

FIG. 4 is a schematic view of a vehicle as a carrier of an on-board security system before processing according to one embodiment of the present disclosure.

FIG. 5 is a schematic view of a subframe according to one embodiment of the present disclosure.

Fig. 6 is a schematic view of an assembled state of a subframe according to an embodiment of the present disclosure after being mounted to a vehicle.

Fig. 7A and 7B are schematic views of installation states of a CT article detection apparatus and a subframe according to an embodiment of the present disclosure.

Fig. 8 is a schematic view of the installation state between the cabin and the subframe according to an embodiment of the present disclosure.

FIG. 9 is an enlarged partial view of a subframe according to one embodiment of the present disclosure.

FIG. 10 is a schematic view of a three-compartment door for a millimeter wave human detection device in a closed state according to one embodiment of the present disclosure.

FIG. 11 is a schematic view of a three-compartment door for a millimeter wave human detection device in an open state according to one embodiment of the present disclosure.

FIG. 12 is a schematic top view of a millimeter wave human detection device detection platform according to one embodiment of the present disclosure.

Fig. 13 is a schematic perspective view of a lower door open state according to one embodiment of the present disclosure.

Fig. 14 is a schematic perspective view of a lower door in a collapsed state according to one embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the embodiments described are only some embodiments of the present disclosure, rather than all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without inventive step, are intended to be within the scope of the present disclosure.

In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are presented only for the convenience of describing and simplifying the disclosure, and in the absence of a contrary indication, these directional terms are not intended to indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the disclosure; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

In the description of the present disclosure, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present disclosure.

The CT security inspection technology, which is a computed tomography security inspection technology, is a high-tech security inspection technology developed in recent years. The CT technology was initially applied in the medical field and later extended to industrial nondestructive inspection and safety inspection. The CT security inspection technology can acquire and utilize multi-dimensional information such as density, effective atomic number and the like of an object to be detected, realize detection and alarm of various drugs/explosives in the luggage and have higher detection capability and lower false alarm rate; the CT security inspection system can well make up the defects of the traditional article machine in the aspect of application.

In the present disclosure, a multi-function vehicle mounted security inspection system is provided. The chassis of a vehicle (such as a truck) is used as a carrier of a multifunctional vehicle-mounted security inspection system, and equipment is configured by utilizing the excellent carrying capacity and good passing performance of the truck. A cabin 15 is disposed behind a chassis cab of the vehicle, and the cabin 15 is divided into a front part and a rear part, the front part being an operation room 16 and the rear part being an equipment room 17.

The method takes a moving vehicle as a carrier and takes an advanced CT security inspection device as a main article detection means. The multi-function vehicle carries safety inspection system of this disclosure includes: a cab 1; an operator compartment inlet 2; a millimeter wave human body detection device detection platform 3; a millimeter wave human body detection device 4; an X-ray fluoroscopy human body detection device 5; an X-ray fluoroscopy human body detection device inlet 6; an outlet conveying mechanism 7 of the CT article detection device; a CT item detection device 8; an inlet conveying mechanism 9 of the CT article detection device; a radioactive substance detection device 10; an operator station 11; a backscatter detection device 12; trace explosive drug safety inspection equipment 13; and a raman detector 14. The multifunctional vehicle-mounted security inspection system has the characteristics of flexibility and quickness in response, can be widely applied to key places such as airports, stations, ports, frontier defense, major activities and the like, can meet the special requirements of special industry departments such as public security, civil aviation, customs and the like on the maneuverability of inspection places, and particularly aims at the conditions that the inspected object is wide in regional distribution but low in density or has an emergency.

The equipment room 17 is provided with: CT article detection equipment 8, X-ray perspective human body security inspection equipment 5 and radioactive substance detection equipment 10. The CT object detection equipment is transversely arranged at the rear part of the cabin body 15. The left side in front of the CT article detection device 8 is provided with a radioactive substance detection device 10, the right side in front of the CT article detection device 8 is provided with an X-ray perspective human body security inspection device 5, and the X-ray perspective human body device is also provided with an X-ray perspective human body detection device inlet 6 so that a detected person can conveniently get in and out. The operation chamber 16 is provided with 1-2 stations and corresponding operation tables, and can control each device. The operator's compartment is provided with a separate 2-compartment access through which an operator can enter. Other detection instruments such as the backscattering detection equipment 12, the trace explosive drug safety inspection equipment 13, the raman detector 14 and the like are arranged in the operation room, so that the operation is convenient for operators to use. The millimeter wave human body security inspection equipment 4 is arranged outside the operation room 16 and is provided with the millimeter wave human body detection equipment detection platform 3, so that the detection of the detected personnel outside the cabin body 15 is facilitated. The layout of each device in the device chamber 17 and the operation chamber 16 described above is merely exemplary, and other layouts may be included.

The functions and effects of the respective devices will be briefly described below. The X-ray human body security inspection equipment 5 can judge whether the human body to be inspected carries dangerous goods and contraband or not by analyzing the scanned image, and can be mainly used for discovering drugs hidden in the abdomen of the human body. The millimeter wave human body security inspection equipment 4 can generate millimeter wave holographic images for the inspected person by using an active millimeter wave holographic imaging technology, and can determine whether hidden suspicions exist on the human body surface from the images. The backscatter detection device 12 uses a non-contact security inspection technique that examines in an image to quickly and accurately detect potential threats behind non-metallic surfaces. The radioactive substance detection device 10 realizes a monitoring system for determining whether a detected region contains a radioactive substance by utilizing the principle that when the radioactive substance passes through a system monitoring passage, the leakage ray of the radioactive substance causes an abnormal change of the counting rate of the system. The trace explosive drug safety inspection device 13 can determine the type of the detected substance by detecting the peak time of the weak current from the detector and matching the peak time with the standard substance library. The raman detector 14 irradiates the substance to be detected with laser light, detects a raman spectrum of the substance to be detected, and identifies the substance to be detected by comparing with spectrograms in the spectrogram library.

The advanced security inspection equipment is an effective detection means in respective detection fields, and each equipment has unique characteristics and a certain application range. If a comprehensive security check is desired, all devices need to be equipped individually. It should be noted that the multi-function vehicle-mounted security inspection system does not necessarily include the various security inspection devices, some or all of the security inspection devices may be selected according to needs, and other security inspection devices known in the art may also be applied to the multi-function vehicle-mounted security inspection system. In performing security inspection, an exemplary operation flow is as follows: the detected person sequentially moves from front to back along the vehicle body from the left side of the vehicle head to back, and the radioactive substance can be monitored without stopping when passing through the radioactive substance detection device 10; when the detected person moves forward, the detected person puts the object into the inlet conveying mechanism 9 of the CT object detection device 8, then the object moves from the left tail to the right tail, and the object is sent back to the detected person by the outlet conveyor 7 of the CT object detection device after the object is detected; then, the person to be detected moves forward along the right side of the tail of the vehicle, and enters the X-ray perspective human body detection equipment 5 for detection through a boarding ladder at the position of the X-ray perspective human body security inspection equipment inlet 6, namely the person to be detected needs to step into the cabin 15; after detection, the millimeter wave human body detection equipment continues to move forwards, and the millimeter wave human body detection equipment is stood on the detection platform 3 for detection, namely, the detected person does not need to step into the cabin 15; after detection, at an entrance 2 of the operation room, an operator samples a suspected substance and brings the sample into the operation room 16, and the suspected substance passes through other detection equipment such as trace explosive drug safety inspection equipment 13 and a Raman detector 14; after the detection, the automobile head can be separated from the front of the right side of the automobile head if all the automobile head passes through the automobile head. The above security process example is merely exemplary, and the security process may be changed according to a change in the location of each security device. In the embodiment shown in fig. 3, the CT article detection device 8 adopts a single-side article entering and exiting mode, and in the flowchart shown in fig. 3, the person to be detected can complete all security inspection processes on one side of the vehicle.

The vehicle-mounted mobile security inspection equipment disclosed by the invention is rapid to move and convenient to unfold. After receiving the security inspection instruction, the system can quickly arrive at the designated security inspection site, quickly unfold and start to perform security inspection work. The security inspection equipment can be installed and debugged without getting off the vehicle, and can directly detect articles.

The vehicle-mounted security inspection equipment adopts a chassis of a vehicle (such as a truck) as a carrier, so that the ground clearance is high; the security personnel who are not suitable for holding the luggage can perform the article security inspection action. It is very inconvenient to get and put the luggage package. Therefore, the sinking design of the whole security inspection equipment is adopted.

FIG. 4 is a schematic diagram of a vehicle (e.g., a truck) as a carrier for an on-board security system before processing according to one embodiment of the present disclosure. As shown in fig. 4, the vehicle frame 20 is divided into a first portion 21 substantially in front of the rear wheel and a second portion 22 substantially behind the rear wheel. To install the vehicle mounted security system according to the present disclosure, the second portion 22 of the vehicle frame 20 is cut off, as indicated by the shape "X" in fig. 4. Thus, the frame 20 carrying the subframe 30 is located substantially longitudinally forward of the rear ends of the rear wheels.

Fig. 5 is a schematic diagram of a subframe 30 according to one embodiment of the present disclosure. The subframe 30 is mechanically fixed to the frame of the vehicle in which the second portion 22 has been cut off, and the assembly of the subframe 30 to the vehicle (e.g., a truck) is schematically shown in fig. 6.

In the embodiment shown in FIG. 5, the subframe 30 is formed by welding section steel. The subframe 30 includes: a front frame 31, a middle connecting portion 32, and a rear frame 33. The front frame 31 and the rear frame 33 are mechanically connected to or integrally formed with the middle connecting portion 32. The front frame 31 includes at least two parallel frame bars 311, preferably two parallel frame bars 311, extending in the longitudinal direction perpendicular to the middle connecting portion 32. In order to increase the rigidity of the front frame 31, between the frame bars 311 extending in parallel, a plurality of reinforcing cross ribs 312 extending laterally are provided. As shown in fig. 9, in order to facilitate the cables and the like to pass through the subframe 30, a plurality of threading holes 313 are provided in the subframe, and the threading holes 313 may be provided in the reinforcing cross ribs 312 or the frame bars 311. At an end of the frame bar 311 remote from the middle connecting portion 32, a cantilever 314 protruding toward both sides in the lateral direction is provided, and the lateral width of the cantilever 314 is larger than the lateral span of the plurality of frame bars 311. The boom 314 is used to support the nacelle 15. The lateral width of the middle connecting portion 32 is also larger than the lateral span of the plurality of frame bars 311 and is comparable to the width of the cantilever 314.

The rear frame 33 includes two frame bars 331 extending from both lateral ends of the middle connecting portion 32. Each frame bar 331 includes a first portion 3311 and a second portion 3312, which form a generally L-shape. The first portion 3311 extends vertically downward from its lateral end perpendicularly to the middle connecting portion 32, and the vertical extension height of the first portion 3311 is designed such that its height from the ground is suitable for the height at which the checked person places luggage. The second portion 3312 extends rearward in the longitudinal direction from a vertically lower end of the first portion 3311. A hollow structure is formed between the two frame bars 331. A reinforcing rib 332 is provided between the two frame bars 331 extending in parallel at the front and rear end portions of the two frame bars 331. Optionally, a wire through hole is also provided on the rear frame 33. Therefore, the rear frame 33 is of a sunken structure, the middle part is of a hollow structure, a space is reserved for the CT object detection device 8, and reinforcing ribs are locally connected, so that the whole subframe 30 is of a special-shaped structure

The rear frame 33 is configured to carry the CT article detection apparatus 8, and the rear frame 33 carries the CT article detection apparatus 8 as shown in fig. 7A (side view) and 7B (top view). As can be seen in fig. 8, the rear part of the cabin sinks. The inspected article may be fed into the CT article inspection device 8 through a hatch door as shown in fig. 8 for inspection.

In the vehicle-mounted security inspection system of the present disclosure, since the X-ray detection needs to be performed for protection, similar to the X-ray film, and the protection needs to be performed outside the irradiation area, the inspection person needs to enter the vehicle, and can enter the cabin 15 through the X-ray human body security inspection device entrance 6 to perform the inspection in the X-ray human body security inspection device 5. The millimeter wave human body detection equipment 4 is completely harmless, does not need to be protected, is directly outside a vehicle, and can be tested by a person standing on the millimeter wave human body detection equipment detection platform 3.

The following will describe the three-compartment door in relation to the millimeter wave human body detection apparatus detection platform 3.

Since the height of the millimeter wave human body detection device 4 exceeds the inner height of the cabin 15, the millimeter wave human body detection device 4 cannot be directly installed in the cabin 15. The millimeter wave human body detection equipment 4 is arranged close to the outer wall of the cabin body 15, the outer wall is designed into a three-open type cabin door, the

cabin doors

41 and 42 which are opened left and right can well shield interference, the handrail can be extended out, and the lower cabin door 43 which is turned down can support the millimeter wave standing detection platform 3. The lower hatch 43 needs to be provided with an assisting pneumatic spring 50 as an auxiliary support due to its larger gravity, so that the force is reduced when the working personnel turns over the hatch.

Fig. 10 is a schematic view of a three-compartment door for a millimeter wave human detection device in a closed state according to one embodiment of the present disclosure. FIG. 11 is a schematic view of a three-compartment door for a millimeter wave human detection device in an open state according to one embodiment of the present disclosure. FIG. 12 is a schematic top view of a millimeter wave human detection device detection platform according to one embodiment of the present disclosure.

The connection relationship between the millimeter wave standing detection platform 3 and the lower hatch 43 will be described in detail below. Fig. 13 is a schematic perspective view of a lower door open state according to one embodiment of the present disclosure. Fig. 14 is a schematic perspective view of a lower door in a folded state according to one embodiment of the present disclosure.

In the embodiment shown in fig. 13 and 14, the millimeter wave standing detection platform 3 and the lower deck door 43 are pivotably connected to the deck 15, for example, pivotably connected to the deck 15 via a standing detection platform pivot axis 3a and a lower deck door pivot axis 43a, so as to be rotatable within a range of 90 ° about

axes

3a and 43a that are horizontally disposed and parallel to each other. In the present disclosure, the millimeter wave standing detection platform 3 and the lower hatch door 43 are pivotable between a folded state as shown in fig. 14, in which the millimeter wave standing detection platform 3 and the lower hatch door 43 are close to each other and flush with the outer wall of the cabin, and an unfolded state as shown in fig. 13, in which the millimeter wave standing detection platform 3 and the lower hatch door 43 are away from each other in the vertical direction and both are unfolded parallel to the horizontal direction, and thus also perpendicular to the outer wall of the cabin. The unfolded standing detection platform 3 enables the examinee to stand thereon.

Hatch opening generally performs the following process: when the mobile security inspection vehicle arrives at a designated working place, the left and

right hatches

41 and 42 are opened firstly, and the opening angle forms a right angle of 90 degrees with the bulkhead, so that the structure can well shield external interference objects; then the millimeter wave lower cabin door 43 is opened and is parallel to the ground, and the standing detection platform 3 which can be overturned out after being unfolded in place can be used as a standing platform for the security personnel to carry out security inspection operation.

Hatch door closing performs substantially the following process: when the security inspection is completed, the lower door 43 is first closed, and then the left and

right doors

41 and 42 are closed, so that the three doors can be closed. The auxiliary gas spring 50 arranged at the moment can play an auxiliary supporting role, so that the side cabin can be conveniently folded by operators.

An auxiliary gas spring 50 and a bracket mechanism are provided between the millimeter wave standing detection platform 3 and the lower deck door 43. The auxiliary gas spring 50 has one end connected to one of the millimeter wave standing detection platform 3 and the lower hatch 43 and the other end connected to the other of the millimeter wave standing detection platform 3 and the lower hatch 43. Specifically, one end of the auxiliary air spring 50 needs to be connected to a member whose position remains unchanged during the ascent and descent of the lower hatch 43. For example, the standing detection platform pivot axis 3a and the lower door pivot axis 43a do not change their positions during this movement due to their connection to the cabin frame. One end of the auxiliary gas spring 50 may be connected to a pivot shaft of one of the standing detection platform and the lower hatch, while the other end of the auxiliary gas spring 50 is connected to the other one of the lower hatch 43 and the standing detection platform 3.

In the embodiment shown in fig. 13, the standing detection platform 3 comprises three rims, a first rim 34 and a second rim 35 perpendicular to the pivot axis 3a, and a third rim 36 parallel to the pivot axis 3a. The lower door 43 includes four rims, a first rim 431 and a second rim 432 respectively extending perpendicularly to the pivot axis 43a, a third rim 433 connected at both ends thereof to the first rim 431 and the second rim 432 and spaced apart from the pivot axis 43a in parallel to the pivot axis 43a, a fourth rim 434 extending along the axis of the lower door pivot axis 43a, and a fourth rim 434 parallel to and opposing the third rim 433. Although in the illustrated embodiment the standing detection platform 3 comprises three rims, it may also comprise four rims, similar to the lower hatch 43. Although in the illustrated embodiment the lower hatch pivot axis 43a and the standing detection platform pivot axis 3a are mounted outside the frame, it is also possible that the standing detection platform pivot axis 3a extends through the first rim 34 and the second rim 35 of the standing detection platform 3. Lower door pivot axis 43a may also extend through first rim 431 and second rim 432 without providing fourth rim 434.

In the embodiment shown in fig. 13, the rod end of the auxiliary gas spring 50 is pivotably connected to the fourth rim 434 of the lower hatch door 43, and the base end of the auxiliary gas spring 50 is pivotably connected to the lower surface of the standing detection platform 3. In another embodiment, the base end of the auxiliary gas spring 50 is pivotally connected to the fourth rim 434 of the lower hatch door 43, and the rod end of the auxiliary gas spring 50 is pivotally connected to the lower surface of the standing detection platform 3. During the whole door movement process, since the position of the pivot shaft 43a is not changed, the position of the fourth frame 434 is also not changed, the rod end of the auxiliary gas spring 50 can be regarded as a fixed point, and the base end connected to the lower surface of the standing detection platform 3 is changed in position along with the downward-turning and upward-lifting movement of the lower door 43, so that the standing detection platform 3 is far away from and close to the lower door 43. The difference between the center distances of the two extreme positions of the base end is the stroke of the gas spring.

However, although the rod end of the auxiliary air spring 50 is pivotably connected to the fourth rim 434 of the lower hatch 43 in the illustrated embodiment, the present invention is not limited thereto, and the base end of the auxiliary air spring 50 can be pivotably connected to the fourth rim 434 of the lower hatch 43. In the present disclosure, it is sufficient if one of the rod end and the base end of the auxiliary gas spring 50 is kept unchanged in position during the movement of the lower door while the position of the other end can be changed. Since neither the position of the standing detection platform pivot shaft 3a nor the lower hatch pivot shaft 43a changes, one of the rod end and the base end of the auxiliary gas spring 50 may also be pivotably connected to the standing detection platform pivot shaft 3a, and the other of the rod end and the base end is connected to the inner surface of the lower hatch 43.

The bracket mechanism includes a first bracket 51 and a second bracket 52, and both ends of the first bracket 51 are pivotally connected to the first rim 431 of the lower hatch door 43 and the first rim 34 of the standing detection platform 3, respectively.

The second bracket 52 is also connected at both ends to the first rim 431 of the lower door 43 and the first rim 34 of the standing detection platform 3, respectively, so that the first rim 431 of the lower door 43 and the first rim 34 and the second bracket 52 of the standing detection platform 3 constitute a parallelogram-like mechanism. By way of example, the first rim 431 of the lower door 43 may be hingedly connected to the lower door pivot shaft 43a and the second bracket 52, respectively, and the first rim 34 of the standing inspection platform 3 may be hingedly connected to the standing inspection platform pivot shaft 3a and the second bracket 52, respectively. As shown in fig. 13, a hinge point between the first frame 431 of the lower door 43 and the lower door pivot shaft 43a is set to a, a hinge point between the first frame 431 of the lower door 43 and the second bracket 52 is set to B, a hinge point between the first frame 34 of the standing detection platform 3 and the second bracket 52 is set to C, and a hinge point between the first frame 34 of the standing detection platform 3 and the standing detection platform pivot shaft 3a is set to D. When the standing detection platform 3 and the lower door 43 are converted from the unfolded state to the folded state, the first frame 431 of the lower door 43 rotates around the hinge point a (or around the lower door pivot shaft 43 a) and the first frame 34 of the standing detection platform 3 rotates around the hinge point D (or around the standing detection platform pivot shaft 3 a). When the first rim 431 of the lower hatch 43 and the first rim 34 of the standing detection platform 3 are rotated to the position as shown in fig. 14, the standing detection platform 3 and the lower hatch 43 are in a folded state. The first bracket 51 and the second bracket 52 may provide a restriction for the rotation of the first rim 431 of the lower hatch 43 and the first rim 34 of the standing detection platform 3, may make the rotation of the first rim 431 of the lower hatch 43 and the first rim 34 of the standing detection platform 3 more stable, and may be able to follow a predetermined trajectory to avoid unnecessary mechanical interference.

In the present disclosure, two secondary gas springs 50 and two bracket structures are preferably included. The other auxiliary gas spring 50 is disposed in parallel with the aforementioned auxiliary gas spring 50. The other bracket mechanism has two ends pivotally connected to the second frame 432 of the lower door 43 and the second frame 35 of the standing detection platform 3, respectively.

The first bracket 51 is formed of a first portion 511 and a second portion 512, the first portion 511 and the second portion 512 being hinged together at the middle of the first bracket 51 such that the first portion and the second portion are rotatable relative to each other, whereby the relative positions of the first portion and the second portion are different in the unfolded state and the folded state. The hinge end face 5111 of the first portion 511 and the hinge end face 5121 of the second portion are formed obliquely, respectively, so that when the first bracket 51 is in the most unfolded state, as shown in fig. 13, the first portion 511 and the second portion 512 are not parallel to each other, and in order to avoid generation of a dead point, an angle therebetween is less than 180 ° (e.g., between 150 ° and 170 °), thereby preventing the first portion 511 and the second portion 512 from being rotated in opposite directions. In the folded state, as shown in fig. 14, the first and

second portions

511, 512 are pivoted to overlap each other, again with an angle of substantially 0 ° between them.

In the illustrated embodiment, the rod end of the auxiliary air spring 50 is pivotally connected to the fourth rim 434 of the lower door 43, and the auxiliary air spring 50 can assist in lifting the lower door upward, thereby reducing the burden on the worker. The above-described

bracket mechanisms

51 and 52 support the standing detection platform 3 rigidly by abutting against each other through the end faces 5111 and 5121 in the deployed state so that the standing detection platform 3 is away from the lower hatch door 43. The above-described

bracket mechanisms

51 and 52 allow the standing detection platform 3 to approach the lower hatch door 43 by being stacked together in the folded state.

It will be appreciated by those skilled in the art that the embodiments described above are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without conflict in structure or principle. Although the three doors are described as an example in the above embodiment, embodiments of the present disclosure are not limited thereto, and for example, the multi-door structure for a multi-function vehicle security system may include other numbers of doors, such as two, four, or more, etc.

The embodiment of the present disclosure further provides a multi-function vehicle-mounted security inspection system, including as aforementioned any embodiment the sub vehicle frame and be used for bearing the vehicle of security inspection equipment, the sub vehicle frame is installed the vehicle girder of vehicle.

Although the present disclosure is described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of the preferred embodiments of the disclosure, and should not be construed as limiting the disclosure. Although a few embodiments of the disclosed inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims

1. A subframe for a multi-function vehicle security inspection system, the subframe being adapted to be mounted to a vehicle frame to support a cabin of the multi-function vehicle security inspection system,

the frame is longitudinally forward of the rear ends of the rear wheels, characterized in that,

the sub-frame includes: a front frame; a middle connecting part; and a rear frame,

2. The subframe of claim 1 wherein the front frame includes at least two parallel frame bars extending longitudinally perpendicular to the central connecting portion.

3. The subframe of claim 2 wherein said frame bar comprises two frame bars.

4. The subframe of claim 2 or 3 wherein said frame bars span in the transverse direction less than the transverse width of the intermediate link portion.

5. The subframe of claim 2 or 3 wherein a plurality of transversely extending reinforcement cross bars are provided between the parallel extending frame bars.

6. The subframe of claim 5 wherein a plurality of cable holes are provided in the subframe, the cable holes being provided in the reinforcement cross bars and/or the frame bars.

7. The subframe of claim 2 or 3 wherein a cantilevered arm is provided at an end of the frame bar remote from the intermediate connecting portion and projecting laterally toward both sides, the cantilevered arm having a lateral width greater than the lateral span of at least two of the frame bars.

8. The subframe of claim 1 wherein the rear frame includes two frame bars extending from lateral ends of the center connection.

9. The subframe of claim 1 wherein the rear frame is configured to mount CT article detection equipment.

10. The subframe of claim 8 wherein each frame strip of the rear frame includes a first portion and a second portion, the first and second portions defining a generally L-shape.

11. The subframe of claim 10 wherein a first portion extends vertically downward from a lateral end thereof perpendicularly to the middle connecting portion, the first portion having a vertical extension height designed such that the height thereof from the ground is suitable for a height at which the checked person places luggage; and

12. A multi-function vehicle mounted security system comprising:

the subframe of any one of claims 1-11; and

the auxiliary frame is installed on a vehicle crossbeam of the vehicle.