CN220795493U

CN220795493U - Vehicle chassis inspection device

Info

Publication number: CN220795493U
Application number: CN202322236574.6U
Authority: CN
Inventors: 黄玮; 孟辉; 史俊平; 宋全伟; 樊旭平
Original assignee: Nuctech Co Ltd
Current assignee: Nuctech Co Ltd
Priority date: 2023-08-18
Filing date: 2023-08-18
Publication date: 2024-04-16
Anticipated expiration: 2033-08-18

Abstract

The utility model provides a vehicle chassis inspection device, and relates to the field of safety inspection. The vehicle chassis inspection device comprises a bearing mechanism, a back scattering scanning mechanism, N detectors and a vehicle conveying mechanism. When the detected vehicle is inspected, the top of the bearing mechanism is positioned below the detected vehicle; a backscatter scanning mechanism positioned below the top of the carrier mechanism and configured to emit a beam of radiation to scan a chassis of the inspected vehicle at least during inspection of the inspected vehicle; n detectors are positioned below the top of the bearing mechanism and above the back-scattering scanning mechanism and are configured to receive back-scattering signals generated by the chassis of the detected vehicle; the vehicle conveying mechanism is positioned above the N detectors and is configured to drive the detected vehicle to move so that the ray beam scans the chassis of the detected vehicle.

Description

Vehicle chassis inspection device

Technical Field

The present utility model relates to the field of security inspection, and more particularly to a vehicle chassis inspection device.

Background

The vehicle chassis may be hidden from contraband and inspection of the vehicle chassis is therefore necessary, for example, detailed manual inspection of the chassis of each inspected vehicle. However, manual inspection is laborious and time consuming, requires considerable knowledge of the various vehicle chassis by the inspector, and requires a high level of experience and careful responsibility.

In the related art, a vehicle is scanned by using an X-ray transmission mode, for example, patent application with publication number CN1141152994a, entitled security inspection device, security inspection system and security inspection method discloses that a speed detection device is disposed at an upstream of the security inspection device, and beam-out time of a first X-ray accelerator and a second X-ray accelerator is controlled according to a measured speed of the vehicle, so as to radiate X-rays after a cab of the vehicle passes through the security inspection device, so as to improve security of a detection process.

If a mode of checking the chassis of the vehicle when the vehicle runs through the security inspection equipment is adopted, a driver is required to drive in a cab, so that a cab avoidance scanning mode is adopted, incomplete chassis scanning can be possibly caused, and a larger scanning blind area can be formed.

Disclosure of Invention

Therefore, the utility model realizes the inspection of the whole chassis of the vehicle by adopting a back scattering scanning imaging mode in the process of driving the inspected vehicle to move by the vehicle conveying mechanism.

The utility model provides a vehicle chassis inspection device, comprising:

a carrying mechanism, wherein the top of the carrying mechanism is positioned below the inspected vehicle when the inspected vehicle is inspected;

a backscatter scanning mechanism located below the top of the carrier mechanism configured to emit a beam of radiation to scan a chassis of the inspected vehicle at least during inspection of the inspected vehicle;

n detectors, located below the top of the carrying mechanism and above the backscatter scanning mechanism, configured to receive backscatter signals generated by the chassis of the inspected vehicle, N being greater than or equal to 1;

and the vehicle conveying mechanism is positioned above the N detectors and is configured to drive the detected vehicle to move so that the ray beam scans the chassis of the detected vehicle.

According to an embodiment of the utility model, the top of the carrying mechanism includes a first surface that is flush with the ground, and the backscatter scanning mechanism and the N detectors are each positioned within a ground pit to allow the inspected vehicle to move from the ground over the carrying mechanism to be inspected.

According to an embodiment of the present utility model, the vehicle transporting mechanism is mounted to the carrying mechanism, the vehicle transporting mechanism includes: and the top surface of the conveying part is flush with the first surface, and the top surface is contacted with the wheels of the detected vehicle so as to drive the detected vehicle to move.

According to an embodiment of the present utility model, the conveying section includes:

a first conveying section having a top surface in contact with one side wheel of the subject vehicle;

and a second conveying part, the top surface of which is contacted with the other side wheel of the detected vehicle.

According to the embodiment of the utility model, the front projection of N1 detectors in the N detectors is located between the front projection of the first conveying part and the front projection of the second conveying part, no shielding object exists between the N1 detectors and the chassis of the detected vehicle, N is greater than or equal to 2, N1 is greater than or equal to 1, and N is less than or equal to N.

According to an embodiment of the utility model, the orthographic projections of N2 of the N detectors at least partially overlap with the orthographic projections of the first conveying section; and/or the orthographic projection of N3 detectors in the N detectors at least partially overlaps with the orthographic projection of the second conveying part, N2 and N3 are both greater than or equal to 1, and the sum of N1, N2 and N3 is less than or equal to N.

According to an embodiment of the present utility model, the vehicle transporting mechanism includes: and the roller conveying mechanism is configured to drive the inspected vehicle to move through rotating rollers, wherein the first conveying part comprises a first row of rollers, and the second conveying part comprises a second row of rollers.

According to an embodiment of the utility model, said first row of rollers comprises S said rollers, wherein a gap is formed between every two adjacent rollers to allow said backscattered signal to pass through; and/or the second row of rollers comprises K of the rollers, wherein a gap is formed between every two adjacent rollers to allow the backscattered signal to pass through, S, K being greater than or equal to 2.

According to an embodiment of the utility model, the carrying mechanism comprises:

the first accommodating space is used for accommodating the N detectors; and

and the second accommodating space is positioned below the first accommodating space and is used for accommodating the back scattering scanning mechanism.

According to an embodiment of the utility model, the first accommodation space is further used for accommodating the vehicle conveying mechanism.

According to the embodiment of the utility model, the length of the first accommodating space along the first direction is longer than the length of the second accommodating space along the first direction, wherein the first direction is perpendicular to the moving direction of the vehicle conveying mechanism driving the inspected vehicle.

According to an embodiment of the present utility model, the N detectors include:

a first array of detectors comprising at least two detectors;

and the second array detector comprises at least two detectors, wherein the second array detector and the first array detector are symmetrically arranged relative to the central line of the vehicle conveying mechanism along the moving direction.

According to an embodiment of the present utility model, the backscatter scanning mechanism includes: a flying spot scanning component for emitting the radiation beam configured to scan a chassis of the inspected vehicle via the N detectors and the vehicle transport mechanism.

According to an embodiment of the utility model, the forward projection center points of the N detectors, the forward projection center points of the vehicle conveying mechanism, and the forward projection of the X-ray source in the flying spot scanning assembly at least partially overlap.

According to an embodiment of the utility model, the carrying mechanism further comprises: and the guide rail is arranged in the second accommodating space, and the back scattering scanning mechanism is movably arranged on the guide rail.

According to one or more embodiments of the present utility model, a carrying mechanism is provided to carry the inspected vehicle, and the backscatter scanning mechanism is located below the N detectors, and both are located below the inspected vehicle. Because the vehicle conveying mechanism is arranged above the N detectors, the detected vehicle is transmitted and scanned by the ray bundle of the back scattering scanning mechanism through the vehicle conveying mechanism, thus a driver does not need to drive the vehicle to pass, a cab can be scanned, and the condition of scanning blind areas is avoided.

Drawings

The above and other objects, features and advantages of the present utility model will become more apparent from the following description of embodiments of the present utility model with reference to the accompanying drawings, in which:

FIG. 1 schematically illustrates an application scenario diagram in which a vehicle chassis inspection device may be applied according to an embodiment of the present utility model;

fig. 2 schematically shows a front view of a vehicle chassis inspection device according to an embodiment of the utility model;

FIG. 3 schematically illustrates a side view of a vehicle chassis inspection device according to an embodiment of the utility model;

FIG. 4 schematically illustrates a top view of a vehicle chassis inspection device according to an embodiment of the utility model;

fig. 5 schematically shows a cross-sectional view of a civil engineering according to an embodiment of the utility model.

It is noted that the dimensions of the overall/partial structure or the overall/partial area may be exaggerated or reduced in the drawings for the sake of clarity in the drawings for describing embodiments of the present utility model, i.e., the drawings are not drawn to actual scale.

In the drawings, the reference numerals specifically have the following meanings:

110. a vehicle chassis inspection device; 120. a vehicle to be inspected; 130. ground surface; 140. a computer; 111. a carrying mechanism; 1111. a first accommodation space; 1112. a second accommodation space; 1113. a first surface; 112. a detector; 113. a backscatter scanning mechanism; 114. a vehicle conveying mechanism; 1141. a conveying section; 11411. a first conveying section; 11412. a second conveying section; 115. a guide rail; 410. a midline; 510. a ground pit.

Detailed Description

Hereinafter, embodiments of the present utility model will be described with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. 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 utility model. It may be evident, however, that one or more embodiments may be practiced without these specific details. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The terms "comprises," "comprising," and/or the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It should be noted that the terms used herein should be construed to have meanings consistent with the context of the present specification and should not be construed in an idealized or overly formal manner.

Where expressions like at least one of "A, B and C, etc. are used, the expressions should generally be interpreted in accordance with the meaning as commonly understood by those skilled in the art (e.g.," a system having at least one of A, B and C "shall include, but not be limited to, a system having a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.).

The embodiment of the utility model provides a vehicle chassis inspection device, which is provided with a vehicle conveying mechanism, wherein an inspected vehicle is transmitted by the vehicle conveying mechanism to be scanned by a ray bundle of a back scattering imaging scanning mechanism, and N detectors are used for receiving back scattering signals generated by a vehicle chassis, so that missed inspection caused by scanning blind areas can be avoided, and the comprehensiveness and reliability of safety inspection are improved.

Fig. 1 schematically shows an application scenario diagram in which a vehicle chassis inspection device according to an embodiment of the present utility model may be applied. It should be noted that fig. 1 is only an example of an application scenario where the embodiment of the present utility model may be applied, so as to help those skilled in the art understand the technical content of the present utility model, but it does not mean that the embodiment of the present utility model may not be applied to other application scenarios such as vehicles, sites, or environments.

As shown in the application scenario 100 of this embodiment in fig. 1, the vehicle chassis inspection device 110 is installed under the ground 130, the inspected vehicle 120 moves from the ground 130 to the position of the vehicle chassis inspection device 110, the front wheel of the inspected vehicle 120 is located on the vehicle chassis inspection device 110 (only by way of example), the driver can get off the vehicle, the inspected vehicle 120 is driven to move by the vehicle conveying mechanism of the vehicle chassis inspection device 110, and then the back scattering scanning mechanism sends a ray beam to scan the chassis of the inspected vehicle 120, and the back scattering signal is received by one or more detectors to obtain a chassis image. The vehicle chassis inspection device 110 may transmit the chassis image to the communicatively connected computer 140, make a judgment by a judgment staff, or automatically judge the image.

In some embodiments, the vehicle chassis inspection device can also be installed on the ground, the slope is formed from the ground to the top of the bearing platform, the inspected vehicle moves to the top of the bearing platform through the slope, and the inspected vehicle is driven by the vehicle conveying mechanism to receive scanning. Or the vehicle conveying mechanism is also arranged on the slope, and the detected vehicle ascends the slope, is checked and descends the slope to be conveyed by the vehicle conveying mechanism.

It should be understood that the number of vehicles, vehicle chassis inspection devices, and computers in fig. 1 are merely illustrative. There may be any number of vehicles, vehicle chassis inspection devices, and computers, as desired for implementation.

Fig. 2 schematically shows a front view of a vehicle chassis inspection device according to an embodiment of the present utility model. Fig. 3 schematically shows a side view of a vehicle chassis inspection device according to an embodiment of the utility model. Fig. 4 schematically shows a top view of a vehicle chassis inspection device according to an embodiment of the utility model.

As shown in fig. 2 to 4, the vehicle chassis inspection device 110 includes a carrying mechanism 111, a backscatter scanning mechanism 113, N detectors 112 (N is greater than or equal to 1), and a vehicle conveying mechanism 114. When inspecting the test vehicle 120, the top of the carrying mechanism 111 is located below the test vehicle 120. The backscatter scanning mechanism 113 is located below the top of the carrier mechanism 111 and is configured to emit a radiation beam to scan the chassis of the inspected vehicle 120 at least during inspection of the inspected vehicle 120. The N detectors 112 are located below the top of the carrier 111 and above the backscatter scanning mechanism 113, and are configured to receive backscatter signals generated by the chassis of the inspected vehicle 120. The vehicle conveying mechanism is located above the N detectors 112 and configured to drive the inspected vehicle 120 to move so that the beam scans the chassis of the inspected vehicle 120.

Illustratively, the carriage 111 may include a carriage platform that allows the inspected vehicle 120 to move thereon and that protects the underlying backscatter scanning mechanism 113 and the N detectors 112. In some embodiments, the inspected vehicle 120 may include a small vehicle such as a sedan, a minibus, a light bus, a tricycle, or a light cargo vehicle. In other embodiments, the inspected vehicle 120 may include a large vehicle such as a passenger car, a large caravan, a special work vehicle, or a semi-trailer. The distinction between small vehicles and large vehicles may be determined according to the existing traffic regulations or according to the tonnage of the vehicle 120 to be inspected.

It will be appreciated that the overall structure of the vehicle chassis inspection device 110 is constructed in accordance with the tonnage of the inspected vehicle 120 within the target area, for example, the vehicle chassis inspection device 110 can be constructed in a highway inspection station, a related department office location, a large venue or other important security facility, which can withstand vehicles of different tonnages.

Illustratively, the back-scatter technique has an X-ray source on the same side as the detector 112, which emits X-rays toward the chassis of the subject vehicle 120. After the X-rays are irradiated to the object, part of the X-rays are reflected to form back scattering signals, and the back scattering signals are received by the detector.

In some embodiments, the backscatter scanning mechanism 113 includes a flying spot scanning component for emitting a beam of radiation configured to scan the chassis of the inspected vehicle 120 via the N detectors 112 and the vehicle transport mechanism.

Illustratively, the flying spot scanning component is implemented based on a flying spot scanning technique. The flying spot scanning means includes, for example, an X-ray source, a collimator slit, and a chopper wheel arranged in this order in a direction perpendicular to the ground 130, and after the X-ray source emits rays, the rays are collimated by the collimator slit to form a fan-shaped beam, which is then irradiated onto the rotating chopper wheel. The chopper wheel is provided with one or more slits, and the area outside the slits is made of shielding materials (such as lead or tungsten and the like). The chopper wheel rotates around the axis to form a light beam, and performs one-dimensional scanning in the x direction (the ray angle alpha shown in fig. 2 is the scanning range). And the vehicle conveying mechanism drives the detected vehicle 120 to move to scan in the other dimension of the y direction, so as to realize flying spot scanning of the x-y plane. After the radiation beam has been applied to the chassis, the detector 112 receives the back-scattered signal due to Compton scattering principles, and a back-scattered image can be obtained.

In other embodiments, the backscatter scanning mechanism 113 can include a fly-line scanning component that includes an X-ray source and a pre-collimator. The front collimator may be a cylinder parallel to the ground 130, including a slit parallel to the ground 130, through which the X-rays emitted by the X-ray source form fan-shaped X-rays. The fan-shaped x-ray irradiates on the chassis to realize one-dimensional scanning in the x direction, and the other-dimensional scanning in the y direction is also carried out along with the movement of the detected vehicle 120 driven by the vehicle conveying mechanism, so that the fly line scanning of the x-y plane is realized.

Illustratively, the detector 112 may include a gas detector, a semiconductor detector, or a scintillator detector.

In some embodiments, the vehicle transport mechanism is configured to move the inspected vehicle 120 along the direction of travel of the inspected vehicle 120, and the backscatter scanning mechanism 113 is configured to emit a beam of radiation to scan the entire area of the chassis of the inspected vehicle 120, including the area of the chassis under the cab, using the whole vehicle scanning mode.

In some embodiments, the vehicle transport mechanism may include a suspension mechanism, for example, the inspected vehicle 120 may be suspended using a crane handle (e.g., the inspected vehicle 120 is positioned on a suspension board), and moved at a uniform speed along the road surface, such that the chassis of the inspected vehicle 120 is scanned. In other embodiments, the vehicle transport mechanism may include a tractor, such as a tractor coupled to the inspected vehicle 120, to pull the inspected vehicle 120 in front. In other embodiments, the vehicle transport mechanism may include a translating transport mechanism, which may be mounted on top of the carrier mechanism 111, embedded in the top of the carrier mechanism 111, which may include a drag conveyor, belt conveyor, roller transport mechanism, or rail transport mechanism, among others.

According to the embodiment of the present utility model, since the vehicle transporting mechanism is installed above the probe 112, the beam of the test vehicle 120 transmitted through the backscatter scanning mechanism 113 is scanned by the vehicle transporting mechanism, so that the driver's cab can be scanned without driving through, so that the scanning blind area can be avoided.

In some embodiments, as shown in fig. 2-5, the top of the carrier 111 includes a first surface 1113 that is flush with the floor 130, and the backscatter scanning mechanism 113 and the N detectors 112 are each positioned within the floor pit 510 to allow the inspected vehicle 120 to move from the floor 130 to above the carrier 111 for inspection.

According to the embodiment of the present utility model, since the first surface 1113 is disposed flush with the ground 130, the vehicle 120 to be inspected can be directly moved from the ground 130 onto the carrying mechanism 111. The vehicle chassis inspection device 110 can be installed at a position of an entrance or exit of a road, a highway, or a public place on a moving path of the inspected vehicle 120, for example, so that inspection efficiency can be improved.

In particular, "flush" in some embodiments of the utility model includes the absolute value of the difference between the height of the first surface 1113 and the height of the floor 130 being within a predetermined range (e.g., 0-150 mm, by way of example only).

In some embodiments, where the vehicle transport mechanism is mounted to the carrier 111, the vehicle transport mechanism includes a transport portion 1141. As shown in fig. 3, the top surface of the conveying portion 1141 is flush with the first surface 1113, and the top surface contacts the wheels of the vehicle 120 to move the vehicle 120.

For example, where the vehicle conveyor is a translating conveyor, the conveyor 1141 may include a flight portion of a flight conveyor (e.g., the top surface is a flight upper surface), a belt portion of a belt conveyor (e.g., the top surface is a belt upper surface), a roller portion of a roller conveyor (e.g., the top surface is a roller top surface), or a rail portion of a rail conveyor (e.g., the top surface is a rail upper surface).

According to the embodiment of the utility model, the top surface of the conveying part 1141, the first surface 1113 and the ground 130 are all level, so that the conveying part 1141 is convenient to drive the inspected vehicle 120 to move from the ground 130 to the upper side of the carrying mechanism 111 and can be sent out of the ground 130, the energy consumed by conveying can be reduced, the conveying speed can be increased, and the inspected vehicle 120 can be started to leave in time after the inspection is finished.

In some embodiments, the delivery portion 1141 includes a first delivery portion 11411 and a second delivery portion 11412. The top surface of the first conveying portion 11411 is in contact with one side wheel (e.g., the left two wheels) of the subject vehicle 120. The top surface of the second conveying portion 11412 is in contact with the other side wheel (e.g., the right two wheels) of the subject vehicle 120.

For example, the first conveyor 11411 and the second conveyor 11412 may be independent of each other, with the vehicle conveyor mechanism over the N detectors 112, at least a portion of the detectors 112 being free of obstruction from the chassis.

In some embodiments, the front projection of N1 of the N detectors 112 is located between the front projection of the first conveying portion 11411 and the front projection of the second conveying portion 11412, where N is greater than or equal to 2, N1 is greater than or equal to 1, and is less than or equal to N, where no obstruction is present between the N1 detectors and the chassis of the inspected vehicle 120.

According to the embodiment of the present utility model, since the first conveying part 11411 and the second conveying part 11412 are installed at both sides of the first surface 1113, the detector 112 installed at the middle region of the carrying mechanism 111 is not shielded, and the imaging effect can be improved.

In some embodiments, the forward projections of N2 of the N detectors 112 at least partially overlap the forward projections of the first conveying section 11411. And/or the orthographic projection of N3 detectors in the N detectors 112 at least partially overlaps with the orthographic projection of the second conveying portion 11412, where N2 and N3 are both greater than or equal to 1, and the sum of N1, N2 and N3 is less than or equal to N.

According to an embodiment of the present utility model, in addition to N1 detectors placed between the first conveying portion 11411 and the second conveying portion 11412, more detectors 112 may be placed under each, so as to receive more backscatter signals, and improve the backscatter imaging effect.

In some embodiments, the vehicle transport mechanism comprises a roller transport mechanism. The roller conveying mechanism is configured to move the inspected vehicle 120 by rotating rollers, wherein the first conveying portion 11411 includes a first row of rollers, and the second conveying portion 11412 includes a second row of rollers.

Illustratively, the roller conveyor mechanism may include two rows of rollers, a motor, and a chain sprocket. In operation, the front wheels of the vehicle 120 are driven to run on the two rows of rollers, and the output shaft of the motor rotates to drive the chain sprocket to rotate, so as to drive the rollers to rotate and drive the vehicle 120 to pass through the vehicle chassis inspection device 110.

In some embodiments, the first row of rollers comprises S rollers, wherein a gap is formed between every two adjacent rollers to allow the backscattered signal to pass through. And/or the second row of rollers comprises K rollers, wherein a gap is formed between every two adjacent rollers to allow the backscattered signal to pass through, S, K are all greater than or equal to 2, and s, K may be the same or different.

Illustratively, for example, each roller has a diameter of 50mm to 90mm, the gap between two adjacent rollers is between 20mm and 25mm, and the occlusion detector 112 is smaller than or equal to 35% -75% of the area, so that a good imaging effect is achieved (only by way of example).

According to embodiments of the present utility model, there is sufficient clearance between the rollers to allow either smooth transfer of the inspected vehicle 120 or sufficient backscatter signal to pass through the roller clearance to be received by the underlying detector 112 without affecting imaging.

In some embodiments, referring to fig. 1 and 2, the carrying mechanism 111 includes a first accommodation space 1111 and a second accommodation space 1112. The first accommodation space 1111 accommodates the N probes 112. The second accommodation space 1112 is located below the first accommodation space 1111 for accommodating the backscatter scanning mechanism 113.

Illustratively, the carrying mechanism 111 may be a frame structure, and the first receiving space 1111 is a first layer of frame downward from the first surface 1113, and the second receiving space 1112 is a second layer of frame. The frame structure is favorable for reducing the overall weight, realizes the lightweight design, and is convenient for installation, maintenance, movement, replacement and the like.

In some embodiments, referring to fig. 3, the first accommodation space 1111 is further used to accommodate a vehicle conveying mechanism, such as a roller conveying mechanism, embedded in the first accommodation space 1111 above a portion of the detector 112, which makes the overall structure more compact, saving space and civil work.

In some embodiments, referring to fig. 2, a length L1 of the first accommodating space 1111 along the first direction (e.g., the left-right direction) is greater than a length L2 of the second accommodating space 1112 along the first direction, wherein the first direction is perpendicular to the moving direction (e.g., the front-rear direction) of the vehicle conveying mechanism driving the inspected vehicle 120.

In accordance with embodiments of the present utility model, a length L1 greater than a length L2 advantageously provides a larger spatially mounted detector 112, allows the beam to scan smoothly across the chassis without being blocked by the ground pits 510 during x-direction scanning, and has more detectors 112 to receive the backscatter signal, improving imaging.

In some embodiments, the N detectors 112 include a first array of detectors 112 and a second array of detectors 112, the first array of detectors 112 including at least two detectors 112. The second array detector 112 includes at least two detectors 112, wherein the second array detector 112 and the first array detector 112 are symmetrically disposed with respect to a center line of the vehicle conveying mechanism in a moving direction.

Referring to fig. 2-4, 12 detectors 112 may be provided, a first array of detectors located to the left of the centerline 410, which may include 6 detectors. The second array of detectors is located to the right of the centerline 410 and may include 6 detectors.

According to the embodiment of the utility model, the two arrays of detectors are symmetrically arranged left and right, which is beneficial to uniformly receiving the back scattering signals returned from the left and right sides of the chassis of the detected vehicle 120 and improving the imaging effect.

In some embodiments, the forward projected center points of the N detectors 112, the forward projected center points of the vehicle transport mechanism, and the forward projections of the X-ray sources in the flying spot scanning assembly at least partially overlap, such as the forward projections of the first two forward projected center points falling on the forward projections of the X-ray sources.

Referring to fig. 2, the start point of the ray angle α is the position of the X-ray source. The center point of orthographic projection of the N detectors 112 is, for example, the center point of orthographic projection of 12 detectors 112, and the center point of orthographic projection of the vehicle conveying mechanism is, for example, the center point between orthographic projections of two rows of rollers.

According to the embodiment of the utility model, the beam sent by the X-ray source can uniformly scan the left side and the right side of the detected vehicle 120 in the X-direction, and each detector 112 can better receive the back-scattered signal.

In some embodiments, the carrier 111 further comprises a guide rail 115. The guide rail 115 is installed in the second accommodation space 1112, and the backscatter scanning mechanism 113 is movably installed on the guide rail 115.

Illustratively, for example, sliders are mounted on the left and right sides of the bottom of the backscatter scanning mechanism 113, and are mounted on the left and right guide rails 115, respectively. The backscatter scanning mechanism 113 is movable in the front-rear direction along the guide rail 115 within the second accommodation space 1112. In other embodiments, the back scattering scanning mechanism 113 may have sliders mounted on front and rear sides of the bottom thereof and mounted on guide rails 115 on the front and rear sides thereof to move laterally.

According to the embodiment of the utility model, the back-scattering scanning mechanism 113 can move along the guide rail 115 to adjust the position of the back-scattering scanning mechanism, so that the position of the transmitted ray beam of the X-ray source can be adjusted to have a better imaging effect.

In some embodiments, referring to fig. 1-5, the vehicle chassis inspection device 110 is integrally mounted below the ground 130, and the upper surface (i.e., the first surface 1113) of the carrier 111 is flush with the ground 130. The detector 112 is used for receiving the back-scattered signal and is mounted on an upper layer inside the carrying mechanism 111. The roller conveyor is mounted above the detector 112 and the backscatter scanning mechanism 113 is mounted below the detector 112 by a rail 115. The detector 112, the roller conveying mechanism, and the backscatter scanning mechanism 113 are all mounted in the carriage mechanism 111.

In operation, the front wheels of the vehicle ride on the rollers, and the roller conveyor conveys the vehicle through the chassis inspection. Since the two rows of rollers of the roller conveying mechanism are installed at both sides of the carrying mechanism 111, the detector 112 installed in the middle of the carrying mechanism 111 is not shielded. And there is enough clearance between the rollers, so that the vehicle can be ensured to be smoothly conveyed, and enough rays can pass through the clearance between the rollers and reflect to the detectors 112 at two sides of the bearing mechanism 111, and imaging is not affected. The whole vehicle scanning mode can be adopted to detect the vehicle chassis, so that scanning blind areas are avoided.

The embodiments of the present utility model are described above. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present utility model. Although the embodiments are described above separately, this does not mean that the measures in the embodiments cannot be used advantageously in combination. The above definitions of the elements and methods are not limited to the specific structures, shapes or modes mentioned in the embodiments, and may be simply modified or replaced by those of ordinary skill in the art. The scope of the utility model is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be made by those skilled in the art without departing from the scope of the utility model, and such alternatives and modifications are intended to fall within the scope of the utility model.

Claims

1. A vehicle chassis inspection device, characterized by comprising:

2. The vehicle chassis inspection device according to claim 1, wherein:

the top of the carrying mechanism comprises a first surface which is flush with the ground, and the back-scattering scanning mechanism and the N detectors are positioned in the ground pit so as to allow the inspected vehicle to move from the ground to be inspected above the carrying mechanism.

3. The vehicle chassis inspection device according to claim 2, wherein the vehicle conveyance mechanism is mounted to the carrier mechanism, the vehicle conveyance mechanism comprising:

and the top surface of the conveying part is flush with the first surface, and the top surface is contacted with the wheels of the detected vehicle so as to drive the detected vehicle to move.

4. A vehicle chassis inspection device according to claim 3, wherein the conveying portion includes:

5. The vehicle chassis inspection device according to claim 4, wherein:

the orthographic projection of N1 detectors in the N detectors is positioned between the orthographic projection of the first conveying part and the orthographic projection of the second conveying part, no shielding object exists between the N1 detectors and the chassis of the detected vehicle, N is greater than or equal to 2, N1 is greater than or equal to 1, and N is less than or equal to N.

6. The vehicle chassis inspection device according to claim 5, wherein:

the orthographic projection of N2 detectors in the N detectors at least partially overlaps with the orthographic projection of the first conveying part; and/or

The orthographic projection of N3 detectors in the N detectors is at least partially overlapped with the orthographic projection of the second conveying part, N2 and N3 are both larger than or equal to 1, and the sum of N1, N2 and N3 is smaller than or equal to N.

7. The vehicle chassis inspection device of claim 6, wherein the vehicle transport mechanism comprises:

and the roller conveying mechanism is configured to drive the inspected vehicle to move through rotating rollers, wherein the first conveying part comprises a first row of rollers, and the second conveying part comprises a second row of rollers.

8. The vehicle chassis inspection device according to claim 7, wherein:

the first row of rollers includes S rollers, wherein a gap is formed between every two adjacent rollers to allow the backscattered signal to pass through; and/or

The second row of rollers includes K rollers, wherein a gap is formed between every two adjacent rollers to allow the backscattered signal to pass through, each of S, K being greater than or equal to 2.

9. The vehicle chassis inspection device according to any one of claims 1 to 8, characterized in that the carrying mechanism includes:

the first accommodating space is used for accommodating the N detectors; and

10. The vehicle chassis inspection device according to claim 9, wherein:

the first accommodation space is also used for accommodating the vehicle conveying mechanism.

11. The vehicle chassis inspection device according to claim 9, wherein:

the length of the first accommodating space along the first direction is greater than the length of the second accommodating space along the first direction, wherein the first direction is perpendicular to the moving direction of the detected vehicle driven by the vehicle conveying mechanism.

12. The vehicle chassis inspection device of claim 11, wherein the N detectors comprise:

a first array of detectors comprising at least two detectors;

13. The vehicle chassis inspection device of claim 9, wherein the backscatter scanning mechanism comprises:

a flying spot scanning component for emitting the radiation beam configured to scan a chassis of the inspected vehicle via the N detectors and the vehicle transport mechanism.

14. The vehicle chassis inspection device according to claim 13, wherein:

the forward projection center points of the N detectors and the forward projection center point of the vehicle conveying mechanism are at least partially overlapped with the forward projection of the X-ray source in the flying spot scanning component.

15. The vehicle chassis inspection device of claim 13, wherein the load bearing mechanism further comprises:

and the guide rail is arranged in the second accommodating space, and the back scattering scanning mechanism is movably arranged on the guide rail.