CN106290422B

CN106290422B - Imaging device and method for vehicle safety inspection

Info

Publication number: CN106290422B
Application number: CN201610728728.5A
Authority: CN
Inventors: 曲海波; 赵杰
Original assignee: Beijing Hualixing Sci Tech Development Co Ltd
Current assignee: Beijing Hualixing Sci Tech Development Co Ltd
Priority date: 2016-08-25
Filing date: 2016-08-25
Publication date: 2020-09-08
Anticipated expiration: 2036-08-25
Also published as: CN106290422A

Abstract

The disclosure relates to an imaging device and an imaging method for vehicle safety inspection, and belongs to the field of safety inspection. An imaging device for vehicle safety inspection includes: the radiation source device comprises a first ray unit, wherein the first ray unit emits a first ray beam along a first preset opening angle so that the first ray beam passes through a first part of a detected vehicle passing through an inspection channel at a preset speed; the detector device comprises a first detector unit which is arranged corresponding to the first ray unit and is used for receiving the first ray bundle. Wherein the radiation source device is at least partially arranged above a road surface of the examination channel and the first detector unit is arranged at a first side of the examination channel. The imaging device and the method for vehicle safety inspection can realize the safety inspection work of whether the specific part in the vehicle hides the illegal object.

Description

Imaging device and method for vehicle safety inspection

Technical Field

The present disclosure relates to the field of security inspection technology, and more particularly, to an imaging apparatus for vehicle security inspection and a method thereof.

Background

With the need of fighting smuggling and safety, research is being conducted worldwide on how to use more advanced technology to guarantee social safety and fight against smuggling and terrorist criminal activities.

The system has the characteristics of strong concealment, low efficiency, low speed, large investment in manpower and material resources and poor accuracy by using a traditional manual inspection method, so that the system is urgently needed to quickly capture images of concealed parts of the vehicles in the process of vehicle passing so as to discover prohibited articles, and can be widely applied to security inspection in places such as customs, government offices, security departments, prisons, meeting places, competition venues, airports, restaurants, banks, ports, nuclear power stations and the like.

The prior general container vehicle inspection technical scheme is that a radiation source is arranged on the side surface of a detected vehicle for imaging, and the radiation source needs to have a certain installation height, so the minimum scanning height of the equipment is not less than 0.5m, and complete vehicle tires and a tool box or a trunk at the lower part of the vehicle cannot be scanned, therefore, the problem can be solved only by raising the passing ground height of the vehicle, not only the civil engineering construction amount is large, but also the ground construction cannot be carried out in the application scenes of a plurality of container vehicle inspection equipment, therefore, the prior general inspection technical scheme has the defects in the inspection of the vehicle tires, the tool box at the lower part and the trunk, and the potential safety hazard is brought.

In addition, in the existing inspection technology for radiation imaging in vehicle traffic, in order to ensure the safety of personnel, scanning must be carried out after avoiding a cab, and personnel also exist in the rear row of the cab of the small passenger vehicle, so that the existing inspection technology cannot realize the inspection of hidden parts such as a trunk, tires, a tool box and the like of a small and medium-sized passenger vehicle, and the existing inspection technical scheme has potential safety hazards and risks in the inspection of the small passenger vehicle.

Therefore, a new image forming apparatus for vehicle safety inspection and a method thereof are required.

The above information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

The present application discloses an image forming apparatus for vehicle safety inspection and a method thereof, which can solve all or part of the problems of the prior art described above.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows, or in part will be obvious from the description, or may be learned by practice of the disclosure.

According to an aspect of the present disclosure, there is provided an imaging apparatus for vehicle safety inspection, including: the radiation source device comprises a first ray unit, wherein the first ray unit emits a first ray beam along a first preset opening angle so that the first ray beam passes through a first part of a detected vehicle passing through an inspection channel at a preset speed; the detector device comprises a first detector unit which is arranged corresponding to the first ray unit and is used for receiving the first ray bundle; wherein the radiation source device is at least partially arranged above a road surface of the examination channel and the first detector unit is arranged at a first side of the examination channel.

In an exemplary embodiment of the present disclosure, the radiation source device further includes: a second ray unit emitting a second ray bundle along a second predetermined opening angle so that the second ray bundle passes through a second portion of the subject vehicle. Wherein the direction of the second predetermined opening angle is different from the direction of the first predetermined opening angle.

In an exemplary embodiment of the present disclosure, the detector device further includes: the second detector unit is arranged corresponding to the second ray unit and used for receiving the second ray bundle; wherein the second detector unit is arranged at a second side of the examination channel.

In an exemplary embodiment of the present disclosure, the first detector cell and the second detector cell have a predetermined height. Wherein the predetermined height is determined in accordance with the first predetermined opening angle of the first beam and the second predetermined opening angle of the second beam and the size of the first portion and the second portion.

In an exemplary embodiment of the disclosure, the first ray unit comprises a ray source and a shield, the shield and the collimator being configured to shield rays emitted by the ray source outside the first predetermined opening angle while constraining a width of the rays.

In an exemplary embodiment of the present disclosure, the first ray unit includes a ray source, a shield, and a collimator. Wherein the shielding body and the collimator are used for shielding rays emitted by the radiation source except the first ray bundle emitted along the first preset opening angle and the second ray bundle emitted along the second preset opening angle, and simultaneously restricting the width of the rays. Wherein the second beam of rays passes through a second portion of the inspected vehicle.

In an exemplary embodiment of the present disclosure, the detector device further includes: a second detector unit arranged corresponding to the second predetermined aperture angle, the second detector unit being configured to receive the second beam of rays; wherein the second detector unit is arranged at a second side of the examination channel.

In an exemplary embodiment of the present disclosure, a portion of the radiation source device is embedded below a road surface of the inspection channel, and another portion of the radiation source device is exposed out of the road surface of the inspection channel, wherein a height of the exposed portion is less than a preset value. Wherein the preset value is related to the ground clearance of the chassis of the detected vehicle.

In an exemplary embodiment of the present disclosure, when the subject vehicle is of a first vehicle type, the exposed portion of the radiation source device has a first height, and the radiation source device emits rays having a first energy; when the detected vehicle is of a second vehicle type, the exposed part of the radiation source device has a second height, and the radiation source device emits rays with second energy; wherein the first height is less than the second height and the first energy is less than the second energy.

In an exemplary embodiment of the present disclosure, further comprising: the first sensing assembly is arranged on the first side of the radiation source device and used for outputting a first sensing signal to indicate that the detected vehicle enters the inspection channel.

In an exemplary embodiment of the present disclosure, the first sensing assembly includes a ground sensing coil buried at an entrance of the inspection passage.

In an exemplary embodiment of the present disclosure, further comprising: and the second sensing assembly is arranged between the first sensing assembly and the radiation source device and is used for outputting a second sensing signal to indicate that the first part of the detected vehicle enters a radiation area of the radiation source device and controlling the radiation source device to emit rays with a first dose.

In an exemplary embodiment of the present disclosure, the second sensing assembly includes a first photoelectric switch group disposed at both sides of the inspection passage and/or a road surface of the inspection passage.

In an exemplary embodiment of the present disclosure, further comprising: the third sensing assembly is arranged on the second side of the radiation source device and used for outputting a third sensing signal to indicate that the first part of the detected vehicle moves away from the radiation area of the radiation source device and controlling the radiation source device to emit rays with a second dose; wherein the second dose is less than the first dose.

In an exemplary embodiment of the disclosure, the third sensing assembly includes a second photoelectric switch group disposed at both sides of the inspection channel and/or a road surface of the inspection channel.

In an exemplary embodiment of the present disclosure, further comprising: and the speed sensor is used for measuring the moving speed of the detected vehicle in the inspection channel.

In an exemplary embodiment of the present disclosure, further comprising: the first time delay device is connected with the speed sensor and used for setting a first delay time according to the moving speed and the size of the first part; when the second sensing assembly detects that the first part of the detected vehicle enters the radiation area of the radiation source device, a first control signal is output to control the dose of the rays emitted by the radiation source device to be converted from the first dose to a second dose after the first delay time.

In an exemplary embodiment of the present disclosure, further comprising: the second time delay device is connected with the speed sensor and used for setting a second delay time according to the moving speed and the wheel base between the first part and a third part of the detected vehicle; when the dose of the rays emitted by the radiation source device is converted from the first dose to the second dose, and the second delay time is passed, a second control signal is output to control the dose of the rays emitted by the radiation source device to be converted from the second dose to the first dose.

In an exemplary embodiment of the disclosure, the radiation source device is arranged in the center of the road surface of the inspection channel, and the target of the first ray unit is arranged above the road surface of the inspection channel.

In an exemplary embodiment of the disclosure, the first predetermined opening angle and the second predetermined opening angle are opposite in direction, and the first detector unit and the second detector unit are oppositely arranged.

In an exemplary embodiment of the present disclosure, further comprising: and the data acquisition and imaging device is connected with the detector device and used for receiving the first ray intensity data output by the first ray unit to generate a first radiation image of the first part.

In an exemplary embodiment of the present disclosure, further comprising: and the display device is connected with the data acquisition and imaging device and is used for displaying the first radiation image of the detected vehicle.

In an exemplary embodiment of the present disclosure, further comprising: and the judging device is used for judging whether forbidden articles are entrained in the first part or not according to the first radiation image.

In an exemplary embodiment of the present disclosure, further comprising: and the control device is connected with the radiation source device and the detector device and is used for controlling the starting and the closing of the radiation source device and the detector device.

In an exemplary embodiment of the present disclosure, the first detector unit and the second detector unit are line detectors.

In an exemplary embodiment of the disclosure, the radiation surface of the first beam of rays of the first predetermined opening angle is perpendicular to the road surface of the inspection channel.

According to one aspect of the present disclosure, there is provided an imaging method for vehicle safety inspection, comprising: a first part of the checked vehicle passing through the checking channel at a preset speed is penetrated by a first ray bundle emitted along a first preset opening angle; receiving the first radiation beam passing through the first portion and outputting first radiation intensity data; generating a first radiation image of the first portion from the first ray intensity data; and judging whether forbidden articles are entrained in the first part or not according to the first radiation image.

In an exemplary embodiment of the present disclosure, further comprising: passing a second portion of the inspected vehicle with a second beam of rays emitted along a second predetermined opening angle; receiving the second beam of radiation passing through the second portion and outputting second radiation intensity data; generating a second radiation image of the second portion from the second radiation intensity data; and judging whether forbidden articles are entrained in the second part or not according to the second radiation image. Wherein the direction of the second predetermined opening angle is different from the direction of the first predetermined opening angle.

In an exemplary embodiment of the present disclosure, further comprising: when the first part of the detected vehicle is detected to pass through the radiation area in the inspection passage, a preset delay time is passed, and a third part of the detected vehicle is scanned by the first ray beam and is inspected whether forbidden articles are entrained in the third part.

According to the imaging device and the method for the vehicle safety inspection, a specific part (such as a tire, a trunk, a tool box and the like) of a vehicle can be subjected to radiation imaging rapidly, so that the purpose of detecting whether forbidden articles are entrained in the specific part is achieved.

In addition, according to some embodiments of the present disclosure, only a specific portion area of the vehicle may be imaged without imaging other portions, so that the radiation exposure dose received by the occupant is minimized.

In still another aspect, according to some embodiments of the present disclosure, left and right specific portions of a vehicle may be simultaneously imaged without overlapping imaging regions of the left and right specific portions.

Drawings

The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 schematically illustrates a structural view of an image forming apparatus for vehicle safety inspection according to an example embodiment of the present disclosure;

FIG. 2 schematically illustrates a schematic structural view of another imaging device for vehicle safety inspection according to an example embodiment of the present disclosure;

fig. 3 schematically illustrates a structural view of still another image forming apparatus for vehicle safety inspection according to an example embodiment of the present disclosure;

FIG. 4 schematically illustrates a flow chart of an imaging method for vehicle safety inspection, according to an example embodiment of the present disclosure;

FIG. 5 schematically illustrates a flow chart of another imaging method for vehicle safety inspection, according to an example embodiment of the present disclosure;

fig. 6 schematically illustrates a flow chart of yet another imaging method for vehicle safety inspection according to an example embodiment of the present disclosure.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other methods, components, materials, devices, steps, and so forth. In other instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

The utility model provides a novel an image device for vehicle safety inspection utilizes the detector device who installs in the radiation source device on inspection passageway road surface and inspection passageway side to carry out the radiation imaging to the vehicle specific site in marcing to whether carry forbidden article in this specific site according to the radiation image judgement. The following embodiments are described by taking the specific portion as an example of the tire of the vehicle to be inspected, but it should be noted that the specific portion is not limited to the tire, and may be, for example, a trunk, a tool box, a trunk, and the like of the vehicle to be inspected.

Fig. 1 schematically illustrates a structural view of an image forming apparatus for vehicle safety inspection according to an example embodiment of the present disclosure.

As shown in fig. 1, an image forming apparatus 100 for vehicle safety inspection includes: a radiation source arrangement 110 and a detector arrangement 120.

Wherein the radiation source device 110 comprises a first ray unit 111, the first ray unit 111 emitting a first ray bundle S1 along a first predetermined opening angle α, such that the first ray bundle S1 passes through a first portion (e.g. a first tyre 141) of the vehicle under examination 140 passing through the examination tunnel 130 at a preset speed.

Wherein the radiation source device 110 is at least partially arranged above a road surface 131 of the examination channel 130.

In an exemplary embodiment, a portion of the radiation source device 110 may be embedded below the road surface of the inspection channel 130, and another portion may be exposed from the road surface 131 of the inspection channel 130, wherein the height H1 of the exposed portion is less than a preset value.

In some embodiments, the preset value is related to a ground clearance H2 of the chassis of the subject vehicle 140. Wherein H1 is less than H2.

In other embodiments, the radiation source device 110 may be disposed on the road surface 131 of the inspection passage 130, as long as it satisfies that the height of the exposed ground portion is less than the minimum ground clearance of the inspected vehicle.

In an exemplary embodiment, the radiation source device 110 may be disposed in the center of the road surface 131 of the inspection channel 130. In some embodiments, the bulls-eye of the first ray unit 111 is disposed above the road surface 131 of the inspection channel 130.

In some embodiments, the radiation source device 110 is a self-shielding module having a leakage rate of less than 2.5 μ Gyh at a distance of 1.5 meters from the radiation source device except for the region outside the beam exit opening for the first radiation beam S1^-1. In some embodiments, radiation source device 110 can be implementedThe protective layer is made of a sheet metal structure and has the protection grade of IP 65.

In the exemplary embodiment, when the subject vehicle 140 is of the first vehicle type, the exposed portion of the radiation source device 110 has a first height, and the radiation source device 110 emits rays having a first energy.

For example, the first vehicle type may be a general passenger vehicle. Since the ground clearance of the chassis of a utility vehicle is typically a minimum of 150mm, it may reach 100mm under heavy load conditions. Thus, the first height may be provided to be less than 100mm, such as 90mm, 80mm, etc.

In the exemplary embodiment, when subject vehicle 140 is of the second vehicle type, the exposed portion of radiation source device 110 has a second height, wherein radiation source device 110 emits radiation having a second energy.

In some embodiments, the first height is less than the second height, and the first energy is less than the second energy.

For example, the second vehicle type may be a container vehicle, the height of the chassis of which from the ground is typically a minimum of 300 mm. Thus, the second height may be provided to be less than 300mm, such as 200mm, 150mm, etc. Meanwhile, since the tire thickness of the general passenger vehicle is generally lower than that of the container vehicle, the radiation energy of the tire radiation imaging of the general passenger vehicle may be set to be lower than that of the tire radiation imaging of the container vehicle, but the disclosure is not limited thereto.

In some embodiments, the vehicle type of the detected vehicle may be further divided more finely, for example, into a car, a bus, a container truck, a van, and the like. And radiation source devices with different energies and different ground heights are arranged according to different vehicle types.

In some embodiments, radiation source devices with corresponding specifications suitable for different vehicle types can be manufactured, and the replacement of the radiation source device can meet the replacement of tire inspection of different vehicle types according to different types of detected vehicles.

In some embodiments, an adaptive adjustable radiation source device may be manufactured, a vehicle chassis height sensor may detect a ground clearance of a chassis of a detected vehicle, and then the height of the portion of the road surface exposed by the radiation source device and/or the emitted radiation energy may be adaptively adjusted according to the detected ground clearance of the detected vehicle.

Wherein the detector arrangement 120 comprises a first detector unit 121 arranged in correspondence with the first ray unit 111, the first detector unit 121 being adapted to receive the first bundle of rays S1.

In some embodiments, the imaging area of the first detector unit 121 may be set to 1.2 meters. Of course, the disclosure is not limited thereto, and the height of the specific imaging area may be adjusted according to the system requirements, for example, selected according to the tire size of the inspected vehicle, the position of the trunk, and tool box, the field angle of the emergent ray of the radiation source device, the distance between the radiation source device and the detector device, the distance between the tire and the radiation source device, and the like. For example, in order to be able to perform complete imaging on the tire of the vehicle to be inspected, the height of the imaging area of the first detector unit may be set to meet the requirement of complete imaging on the maximum size of the tire of the vehicle to be inspected.

In other embodiments, the first detector unit 121 has a pick-up height of 0-0.65 meters. The height of examination from here refers to the height from the ground of the imaging area of the first detector unit 121.

For example, the first ray unit 111 is level with the road surface 131 of the inspection passage 130, the maximum height of the radiation source device 110 exposed to the ground is not more than 80mm, the first detector unit 121 is mounted close to the road surface 131 of the inspection passage 130, the inspection can be started at a distance of "0" above the ground of the tire of the inspected vehicle, and the tire of the inspected vehicle is scanned to check whether the tire is smuggled or carries prohibited articles.

In the above embodiment, the tire of the vehicle to be inspected is taken as an example to describe that the pick-up height of the first detector unit 121 is 0, but the pick-up height can be adjusted according to the specific part to be inspected, for example, since the ground clearance of the specific part such as a trunk or a tool box is not 0, the corresponding pick-up height can be set according to the ground clearance of the trunk or the tool box.

In some embodiments, the detector device 120 may be a sheet metal structure, which can meet the requirements of outdoor perennial use, ventilation, heat preservation, rain protection, and the like.

In an exemplary embodiment, the first detector unit 121 is disposed on a first side of the inspection channel 130. For example, as shown in fig. 1, the first probe unit 121 is disposed on the right side of the inspection tunnel 130 with respect to the driver of the inspected vehicle. However, the present disclosure is not limited thereto, and the first detector unit 121 may be disposed on the left side as long as it can receive the ray bundle passing through the tire on the side of the subject vehicle.

In an exemplary embodiment, the first ray unit 111 comprises a ray source, a shield and a collimator. Wherein the shield and the collimator are adapted to shield rays emitted by the source outside a first predetermined opening angle α while constraining the width of the rays. In some embodiments, the width of the rays after being confined may be 3-5 millimeters. In other embodiments, the width of the beam after being constrained may also be 5 mm to 18 mm. The corresponding collimator can be selected according to the requirements of the system to obtain the rays with the corresponding width.

For example, the first radiation unit 111 may employ a radiation source that emits radiation circumferentially. The shielding body can shield all the rays emitted by the ray source except the first ray bundle S1 emitted along the first preset opening angle alpha, so that the radiation quantity of the driver and passengers from the radiation source can be reduced. In some embodiments, the radiation source may employ an isotope radiation source.

In an exemplary embodiment, the first radiation unit 111 may also employ a first X-ray machine. The maximum energy of the X-ray machine is hundreds of KeV, and the requirement of the penetration capability of the tire can be met. In some embodiments, the first ray unit 111 may also employ an X-ray accelerator.

In an exemplary embodiment, the first ray unit 111 is a point-like X-ray source, which emits fan-like X-rays in a first predetermined aperture angle α range.

In an exemplary embodiment, the radiation energy of the ray unit is in the range of 60-180 KeV.

It should be noted that any radiation source capable of imaging the tire radiation of the vehicle to be inspected belongs to the protection scope of the present disclosure, and the specific radiation energy thereof may be selected by considering factors such as the model of the vehicle to be inspected, the material and thickness of the tire, and the like. For example, when the subject vehicle is a general-purpose passenger vehicle, a radiation source having a radiation energy of 80KeV may be selected; when the vehicle to be inspected is a container vehicle, a radiation source with a radiation energy of 160KeV may be selected.

In an exemplary embodiment, the preset speed of the subject vehicle 140 may be 5km/h to 20 km/h. The disclosure is not so limited. A reminding mark can be arranged at a position before the detected vehicle enters the detection channel and used for reminding the driver of decelerating to be within the speed range in advance.

In an exemplary embodiment, the first beam S1 of the first predetermined opening angle α is perpendicular to the road surface 131 of the inspection channel 130 such that the first beam S1 is perpendicularly incident to the first detector unit 121. Of course, the disclosure is not so limited. In some embodiments, the radiation surface of the first ray bundle S1 emitted by the radiation source device 110 may have an angle with the road surface 131 of the inspection channel 130. In other embodiments, the first ray bundle S1 emitted by the radiation source device 110 may also be parallel to the road surface 131 of the inspection channel 130, as long as it can ensure complete radiation imaging of the tire of the inspected vehicle.

In an exemplary embodiment, the apparatus 100 may further include: a first sensing assembly (not shown) which may be disposed on a first side of the radiation source device 110 (e.g., an entrance side of the inspection channel 130), may be used for detecting whether the inspected vehicle 140 enters the inspection channel 130, and when the first sensing assembly detects that the inspected vehicle 149 enters the inspection channel 130, it outputs a first sensing signal to the apparatus 100 for notifying the apparatus 100 that a vehicle enters the inspection channel 130.

In an exemplary embodiment, the first sensing assembly includes a ground sensing coil embedded at the entrance of the inspection channel 130.

For example, a traffic barrier, a traffic light, etc. may be provided at the entrance of the inspection passage, and the driver may determine whether the inspection passage can be accessed by turning on the traffic barrier and indicating the traffic light. When the first tire 141 of the vehicle 140 is pressed to the ground induction coil, the rail of the barrier is lifted, the traffic signal lamp is turned into green, and the vehicle starts to drive into the inspection channel.

In some embodiments, the apparatus 100 may further include a license plate recognition device, and the license plate recognition device records the license plate information when the inspected vehicle enters the inspection passage.

In an exemplary embodiment, further comprising: and a second sensing assembly, disposed between the first sensing assembly and the radiation source device 110, for outputting a second sensing signal indicating that the first tire 141 of the inspected vehicle 140 enters the radiation area of the radiation source device 110, and controlling the radiation source device 110 to emit radiation with the first dose.

In an exemplary embodiment, the second sensing assembly includes a first set of opto-electronic switches disposed on both sides of the inspection channel 130 and/or on the road surface 131 of the inspection channel 130.

For example, when the front tire (first tire 141) of the subject vehicle 140 presses the ground induction coil, and simultaneously the subject vehicle 140 enters the inspection passage 130 to block the first photoelectric switch group, the radiation source device 110 starts to emit a beam. The first photoelectric switch group confirms that the vehicle arrives through the ground induction signal of the ground induction coil by using a light curtain or a crossed photoelectric signal, and starts radiation scanning.

In an exemplary embodiment, further comprising: a third sensing component, disposed on a second side of the radiation source device 110 (e.g. an exit side of the inspection passage 130), for outputting a third sensing signal indicating that the first tire 141 of the inspected vehicle 140 moves away from the irradiation region of the radiation source device 110, and controlling the radiation source device 110 to emit a second dose of radiation.

Wherein the second dose is less than the first dose. The first dose at least can meet the requirement that the ray bundle passes through the tire radiation imaging of the detected vehicle, and when the tire of the detected vehicle exits the radiation area of the radiation source device, the emergent dose of the radiation source can be reduced so as to reduce the radiation dose to the driver and passengers. In some embodiments, the second dose may be 0, i.e. when the third sensing assembly detects that the currently scanned tire has moved away from the irradiation region, the radiation source device 110 may be controlled to turn off and stop the beam-out. For example, after the front tires of the subject vehicle 140 pass through the second photoelectric switch group, the radiation source device 110 stops emitting beams.

In an exemplary embodiment, the third sensing assembly includes a second set of opto-electronic switches disposed on both sides of the inspection channel 130 and/or on the road surface 131 of the inspection channel 130.

In some embodiments, the two sides (left and right sides) of the inspection passage 130 are respectively provided with a mounting pillar, and the first photoelectric switch group and/or the second photoelectric switch group can be arranged on the pillar. In other embodiments, the first photo switch group and/or the second photo switch group may be installed on a road surface of the inspection tunnel 130 through which the inspection vehicle 140 passes. In other embodiments, the first and second sets of optoelectronic switches are installed at a height from the ground that is approximately the height from the ground of the chassis of the vehicle 140, so that when the signal emitted by the set of optoelectronic switches is blocked, it can be determined that the vehicle is a tire of the vehicle rather than a vehicle body, and the tire of the vehicle approaches the radiation source device.

In some embodiments, the distance between the radiation source device 110 and the first sensing assembly is equal to or slightly larger than the radius of the tire of the inspected vehicle 140. In other embodiments, the second sensing assembly is closer to radiation source device 110 and slightly further from the first sensing assembly. In some embodiments, the distance between the radiation source device 110 and the third sensing assembly is equal to or slightly larger than the diameter of the tire of the inspected vehicle 140.

In an exemplary embodiment, when the first sensing assembly and/or the second sensing assembly detects a third tire of the inspected vehicle 140 (e.g., one of the rear tires of the inspected vehicle, the first tire and the third tire being located on the same side of the inspected vehicle, e.g., the right side), the apparatus 100 controls the radiation source apparatus 110 to turn on the radiation again or convert from the second dose to the first dose, and perform radiation imaging of the third tire. When the third sensing assembly detects that the third tire is driven out of the radiation area of the radiation source device 110, the system controls the radiation source device 110 to switch from the first dose to the second dose, stopping the emission or reducing the emission dose.

For example, when the rear tire of the inspected vehicle 140 enters the first photoelectric switch set and presses the ground sensing coil, the radiation source device 110 starts to emit beams. After the rear tires of the inspected vehicle 140 pass through the second photoelectric switch group, the radiation source device 110 stops emitting beams. And when the last tire is detected to pass, closing the ray and finishing the detection. The system controls the barrier gate to fall down to limit the next vehicle to enter the inspection channel. And judging the image time of the vehicle for the operator, and entering the state of waiting for the next vehicle by the system after the operator presses a confirmation key.

The above description has been given by taking two tires at the front and rear of the subject vehicle 140 as an example, but in actual practice, the above processes of detection, irradiation, beam-out stopping/radiation dose reducing, re-detection, re-irradiation, beam-out stopping/radiation dose reducing may be executed in cycles according to the number of tires at the front and rear of the subject vehicle until all the tires at least one side of the subject vehicle have been inspected. For example, there may be a vehicle having front, middle and rear tires on one side, and the radiation imaging process may be performed three times according to the above process. The present disclosure does not limit the number of tires of the subject vehicle.

Although the ground-sensing coil and the photoelectric switch group are used to detect the entering or leaving radiation area of the tire of the subject vehicle in the above embodiments, the present disclosure is not limited thereto, and any detectable device such as an infrared ray emitting device, a visible light emitting device, an electromagnetic signal emitting device, or an ultrasonic wave emitting device may be used instead of or in combination with the ground-sensing coil and the photoelectric switch group.

In an exemplary embodiment, the apparatus 100 further comprises: and the speed sensor is used for measuring the moving speed of the detected vehicle in the inspection channel.

In some embodiments, the speed sensors include speed measuring radars disposed on both sides of the inspection channel 130.

In other embodiments, the system controls the reconstruction of the radiation image of the tire of the subject vehicle 140 based on the moving speed of the subject vehicle 140 received from the speed sensor and corrects the radiation image data based on the moving speed.

In an exemplary embodiment, the apparatus 100 further comprises: a first time delay device connected to said speed sensor for setting a first delay time T1 according to said moving speed and the size of said first tire. When the second sensing assembly detects that the first tire 141 of the detected vehicle 140 enters the radiation area of the radiation source device 110, and the first delay time T1 is passed, a first control signal is output to control the dose of the radiation emitted by the radiation source device 110 to be converted from the first dose to a second dose.

For example, the apparatus 100 calculates the time taken for the current vehicle 140 to pass through the radiation region of the radiation source device 110 by detecting the real-time vehicle speed of the current vehicle 140 entering the inspection tunnel 130, the size of the scanned tire of the current vehicle 140, and the like, sets the first delay time T1 to be greater than or equal to the calculated time taken, starts timing when the scanned tire is detected to enter the radiation region, determines whether T1 is reached, and determines that the scanned tire has completely passed the radiation region when T1 is reached, at which time the apparatus 100 controls the radiation source device 110 to reduce the radiation dose to a second dose or stop outputting the beam, so as to reduce the scanning of the useless objects and reduce the extra radiation dose for the occupants.

In an exemplary embodiment, further comprising: and a second delay device, connected to the speed sensor, for setting a second delay time according to the moving speed and a wheel base between the first tire 141 and a third portion of the vehicle 140 (for example, a rear tire on the same side as the first tire, hereinafter referred to as a third tire). When the dose of the radiation emitted by the radiation source device 110 is converted from the first dose to the second dose, a second control signal is output to control the dose of the radiation emitted by the radiation source device 110 to be converted from the second dose to the first dose after the second delay time.

Wherein the wheel base between the first tire 141 and said third tire is, for example, the straight distance between the center origins of the front and rear tires. Calculating the time taken for the first tire 141 to drive away from the radiation source device 110 and the third tire to drive into the radiation source device 110 according to the real-time vehicle speed of the vehicle 140 and the wheel base between the front tire and the rear tire, setting the second delay time T2 equal to or less than the calculated time taken, and controlling the radiation source device 110 to restart the ray by the device 100 to perform radiation imaging of the rear tire, namely the third tire.

The embodiment of the invention aims at the fact that the cockpit uses low-dose rays for inspection, so that the dose of the rays received by the cockpit is very low, a driver does not need to get off the vehicle, and the parts like tires are inspected by using high-dose rays, and clear images of target parts are obtained.

It should be noted that, although in the above embodiments, the emitted radiation dose may be reduced or even the radiation source device may be turned off after the first tire is inspected and before the third tire is inspected, in other embodiments, the radiation dose of the radiation source device is not changed from the time when the first tire of the inspected vehicle is detected until all the tires on the same side (for example, the right side) of the inspected vehicle are inspected, that is, the radiation imaging is performed on the specific portions between the two tires on the same side of the inspected vehicle, so that whether the specific portions of the tires, the tool boxes, the luggage boxes, and the like carry prohibited articles or not can be detected at the same time.

In an exemplary embodiment, the apparatus 100 further comprises: and the data acquisition and imaging device is connected with the detector device and is used for receiving the first ray intensity data output by the first ray unit 111 to generate a first radiation image of the first tire 141.

In an exemplary embodiment, the apparatus 100 further comprises: the image shooting device is used for collecting vehicle information, can be arranged above the inspection passage, shoots the body image of the inspected vehicle 140, and can be used for recognizing the license plate of the vehicle and the like.

In an exemplary embodiment, the apparatus 100 further comprises: and the display device is connected with the data acquisition and imaging device and is used for displaying the first radiation image of the detected vehicle 140.

In some embodiments, the apparatus 100 further comprises: and the storage device is used for storing the radiation image information and the license plate information of the tire of the same detected vehicle in a mutual correlation manner, so that the searching and comparison work in the future is facilitated.

In some embodiments, the display device may simultaneously display the radiation image of the detected vehicle and other information (such as the license plate number) of the detected vehicle, and transmit and store the radiation image and the vehicle information simultaneously by using a correlation technique.

In an exemplary embodiment, further comprising: and a determining device, configured to determine whether the first tire 141 carries contraband according to the first radiation image. In some embodiments, when the determination device determines that the first tire of the detected vehicle contains contraband, the determination device may further assist a red warning lamp to start a warning function at the same time.

The radiation source device emits ray beams which penetrate through the tire of the detected vehicle and are received by the detector device on the other side. Because different articles have different densities, the absorption degrees of rays are different, the strength of signals output by the detector device is different, and after the signals with different strengths are processed by the data acquisition and imaging device, the radiation image of the tire of the detected vehicle is displayed on a computer screen in real time. Different objects have different shapes and densities, so that the tires are obviously different from mechanical, electronic and other devices in the radiation images on the radiation images, and whether forbidden objects are entrained in the tires of the vehicles or not can be quickly identified by looking at the radiation images.

In some embodiments, the tire of a general vehicle is empty, and there is no other object under normal conditions, and when the outline of other objects is determined in the radiation image of the tire, the early warning information can be directly sent out, and it is considered that the tire of the detected vehicle has the carried prohibited objects.

In other embodiments, because the information of the vehicle tire, such as the composition material, the structure, the size, and the like, is relatively fixed and known, the radiation intensity data range corresponding to the common tire may be stored in the storage unit of the device in advance, when the device receives the radiation intensity data of the tire of the detected vehicle, the detected radiation intensity data is analyzed, and if the detected data does not match the data range stored in the storage unit, that is, the detected data is not in the data range stored in the storage unit, an abnormality is prompted to occur, and it is determined that the tire of the detected vehicle may have prohibited articles.

In an exemplary embodiment, further comprising: and the control device is connected with the radiation source device 110 and the detector device 120 and is used for controlling the starting and the closing of the radiation source device 110 and the detector device 120. In some embodiments, the control device may be a programmable controller. The radiation source device 110, the detector device 120, the sensing assembly, etc. are connected to the programmable controller by wire or wirelessly.

In some embodiments, the control device is a small cabinet mounted on the side of the detector device 120 with an ethernet interface.

In some embodiments, the radiation source device 110, the detector device 120, the control device and other modules are independently sealed, the connection between the modules is a plug-in type, and the connection is not required to be wired, and the radiation source device can be switched to a tire imaging device of a general passenger vehicle or a tire imaging device of a container vehicle only by replacing the corresponding radiation source device according to the vehicle type. The image shooting device and the like are arranged above the detector device and the control device as much as possible, and the interface with the site is reduced.

In some embodiments, the apparatus 100 may further include a power supply accessory for independently supplying power to each module, thereby facilitating maintenance.

In some embodiments, the apparatus 100 may further include a data analysis device for performing data analysis and data mining on all data of the detected vehicle.

In some embodiments, the apparatus 100 may also provide a data interface that may be integrated into a customer's existing business management system.

The imaging device for vehicle safety inspection provided by the embodiment of the invention utilizes the ray radiation imaging technology, concentrates on the scanning inspection of the vehicle tire, and has strong pertinence, clear target and low misjudgment rate; the device adopts a full-automatic scanning working mode, and a driver can directly drive the vehicle through an inspection channel without operating personnel and stopping the vehicle. On the other hand, the inspection speed is high, the inspected vehicle can run through the inspection vehicle at the speed of 5-20 km/h, and the inspection is finished within a few seconds; the device can be operated for 24 hours all day long. The device has a modular structure design and small floor area. On the other hand, customized solutions can be provided according to customer requirements and field conditions; the scanning system has definite target and simple and reliable operation, and can perform safety inspection aiming at the tire positions of the passenger car and the container car.

Fig. 2 shows a schematic structural diagram of another imaging device for vehicle safety inspection according to an example embodiment of the present disclosure.

As shown in fig. 2, the image forming apparatus 200 for vehicle safety inspection includes: a radiation source device 210 and a detector device 220.

In the exemplary embodiment, wherein the radiation source device 210 includes a first ray unit 211 and a second ray unit 212, the first ray unit 211 emits a first ray bundle S1 along a first predetermined opening angle α, such that the first ray bundle S1 passes through a first tire 241 of the inspected vehicle 240 passing through the inspection tunnel 230 at a preset speed; the second ray unit 212 emits the second ray bundle S2 along a second predetermined opening angle β so that the second ray bundle S2 passes through a second portion (e.g., a second tire 242) of the subject vehicle.

Wherein the first predetermined opening angle α is related to the diameter of the first tyre 241, the distance between the first tyre 241 and the first ray unit 211, which is to meet or approximately meet the vertical cross-section of the first ray bundle S1 being able to pass completely through the first tyre 241. Similarly, the second predetermined opening angle β is related to the diameter of the second tyre 242, the distance between the second tyre 242 and the second ray unit 212, which is to meet or approximately meet the vertical cross-section of the second ray bundle S2 that can completely pass through the second tyre 242.

In an exemplary embodiment, the first and

second radiation units

211 and 212 each employ an X-ray machine. The X-ray machine with the corresponding model can be selected according to the model of the detected vehicle. For example, when the subject vehicle is a general-purpose passenger vehicle, VJ-IXS0808(80KV, 80W) may be used; when the detected vehicle is a container vehicle, the detected vehicle can be VJ-IXS1820(160KV, 200W). In some embodiments, the two X-ray machines are arranged in a back-to-back manner.

In an exemplary embodiment, the first ray unit 211 comprises a ray source and a shield for shielding rays out of the first ray beam S1 and the second ray beam S2. The radiation source can be used as a radioactive source and arranged in the shielding body, and a ray collimator can be arranged outside the shielding body. The shielding body can be made of a lead plate material.

Wherein in the embodiment shown in fig. 2 the first predetermined opening angle α is in the opposite direction to the second predetermined opening angle β. For example, the first predetermined opening angle α is toward the right side of the subject vehicle 240, and the second predetermined opening angle β is toward the left side of the subject vehicle 240. Of course, the disclosure is not so limited.

In the exemplary embodiment, radiation source device 210 is disposed at least partially above a roadway 231 of inspection tunnel 230 such that a bullseye of the radiation source is exposed from the roadway, and radiation source device 210 is centrally located on the roadway of inspection tunnel 230.

In some embodiments, the angle of the first predetermined opening angle is equal to the angle of the second predetermined opening angle, i.e. α ═ β. Of course, the disclosure is not so limited.

Wherein the detector arrangement 220 comprises a first detector unit 221 arranged corresponding to the first ray unit 211 for receiving a first ray bundle S1 passing through the first tyre 241 and a second detector unit 222 arranged corresponding to the second ray unit 212 for receiving a second ray bundle S2 passing through the second tyre 242.

In the exemplary embodiment, a first detector cell 221 is disposed on a first side (e.g., a right side) of inspection channel 230 and a second detector cell 222 is disposed on a second side 233 (e.g., a left side) of inspection channel 230. In fig. 2, the first detector cell 221 and the second detector cell 222 are oppositely disposed. However, the present disclosure is not limited thereto as long as it can receive the radiation beams passing through the left and right tires of the subject vehicle, respectively.

In the exemplary embodiment, the first and

second detector units

221 and 222 have predetermined heights determined according to the first and second predetermined opening angles α and β of the first and second ray beams S1 and S2 and the sizes of the first and second tires 241 and 242 to ensure that both left and right tires of the subject vehicle 240 are completely irradiated.

For example, for a general passenger vehicle, when the distance between the inner surfaces of the first tire 241 and the second tire 242 is 1271.39mm, the distance between the outer surfaces of the first tire 241 and the second tire 242 is 1865.74mm, the diameters of the first tire 241 and the second tire 242 of the vehicle 240 to be tested are both 659.72mm, the distance between the left and right sides of the passage 230 to be tested is 3211.97mm, and the first tire 241 and the second tire 242 are symmetrical with respect to the radiation source device 210, the first predetermined opening angle α and the second predetermined opening angle β may be set to be both 40 degrees, and the height of the start-up inspection area of the first detector unit 221 and the second detector unit 222 is set to be approximately 1205.20 mm. Of course, the data are given based on the ideal situation, and the actual application site may have errors. The data are given according to the specification of the general passenger vehicle, and corresponding data ranges can be selected for vehicles with different specifications.

In the exemplary embodiment, first detector unit 221 and second detector unit 222 are line detectors. Which detects a one-dimensional X-ray intensity distribution by means of light receiving elements arranged in the length direction of a two-wire array sensor.

In the exemplary embodiment, the first detector unit 221 and the second detector unit 222 are plural, and are respectively arranged at different heights, for detecting upper, middle, and lower portions of the tire of the subject vehicle 240.

In an exemplary embodiment, the first and

second detector cells

221 and 222 employ a single, double, or multiple row scintillator structure. The scintillator can be at least one of cadmium tungstate scintillation crystals, thallium-doped cesium iodide scintillation crystals or bismuth germanate scintillation crystals. In some embodiments, the first and

second detector units

221, 222 further comprise photomultiplier tubes coupled to the scintillators. Of course, other types of detectors are within the scope of the present disclosure.

In the exemplary embodiment, the radiation surfaces of the first beam S1 of the first predetermined opening angle α and the second beam S2 of the second predetermined opening angle β are both perpendicular to the road surface 231 of the inspection channel 230.

In an exemplary embodiment, when the first and second sensing assemblies detect that the front-axis left and right tires (i.e., the first and second tires 241 and 242) of the subject vehicle 240 approach the radiation source device 210, the control device sends out a control signal to control the radiation source device 210 to emit a radiation with a first dose, the first and

second detector units

221 and 222 respectively receive the first and second ray beams S1 and S2 at two sides, and respectively generate a first radiation image of the front-axis left tire and a second radiation image of the front-axis right tire according to the received first and second ray beams S1 and S2; when the third sensing assembly detects that the left and right tires of the front axle of the inspected vehicle 240 have completely passed through the radiation source device 210, the control device sends out a control signal to control the radiation source device 210 to emit rays with a second dose or stop emitting beams. Similarly, when the first and second sensing assemblies detect that the rear left and right tires (i.e. the third and fourth tires) of the vehicle 240 approach the radiation source device 210, the control device sends out the control signal again to control the radiation source device 210 to emit the radiation with the first dose, the first and

second detector units

221 and 222 respectively receive the first and second ray beams S1 and S2 at two sides, and respectively generate a third radiation image of the rear left tire and a fourth radiation image of the rear right tire according to the received first and second ray beams S1 and S2; when the third sensing assembly detects that the left and right tires of the rear axle of the inspected vehicle 240 have completely passed through the radiation source device 210, the control device sends out a control signal to control the radiation source device 210 to emit rays with a second dose or stop emitting beams. Until all the tires of the subject vehicle 240 are detected.

In other embodiments, the first time delay device and the second time delay device similar to those in the above embodiments may also be used to control the on/off of the radiation source device 210 and the detector device 220, so as to perform time-sharing radiation imaging on the front axle and the rear axle tires of the vehicle to be detected. For details, reference may be made to the above embodiments, which are not described herein again.

It should be noted that "first", "second", "third", "fourth", etc. in the embodiments of the present disclosure are not used for limiting the number and the sequence, for example, the first tire 241 does not necessarily include only one tire, and may include two tires or even a plurality of tires; the first tire 241 may be any tire in the subject vehicle 240.

The radiation source device emits fan-shaped first ray beams and second ray beams from the bottom of a detected vehicle to two side surfaces, penetrates through the first tire/third tire and the second tire/fourth tire of the two side surfaces, and then is received by the first detector unit and the second detector unit which are arranged on two sides of the inspection passage respectively. Because the density of different parts of the article is different, the absorption degree of the ray is different, the strength of the signal output by the detector unit is different, and after the signals with different strength are processed by the image, the outline and the shape of the article in the tire are displayed on a computer screen, so that whether forbidden articles are carried in each tire of the detected vehicle can be judged.

According to the imaging device for vehicle safety inspection provided by the embodiment of the invention, the two detector units are symmetrically arranged on the left side and the right side of the inspection channel, each side only carries out radiation imaging on one side of the tire, and radiation images of the left tire and the right tire are not overlapped. On the other hand, by arranging the radiation source device at the middle position of the road surface of the inspection passage, the left and right tires are approximately symmetrical to the radiation source device, so that the radiation image magnification ratios of the left and right tires are close to or the same. Meanwhile, when the left tire and the right tire enter the radiation area, the radiation source device is started, and when the left tire and the right tire leave the radiation area, the beams are stopped or the emergent dose is reduced, so that only the tire area is imaged, other parts are not imaged, the dose of the irradiation received by drivers and passengers is minimized, and the safety of the system is ensured.

Other contents in the embodiment of the present invention may refer to the contents in the embodiment of fig. 1, and are not described herein again.

Fig. 3 schematically illustrates a structural view of still another image forming apparatus for vehicle safety inspection according to an example embodiment of the present disclosure.

As shown in fig. 3, the image forming apparatus 300 for vehicle safety inspection includes: a radiation source device and a detector device.

The radiation source device comprises a first ray unit 311 and a second ray unit 312, wherein the first ray unit 311 emits a first ray beam along a first preset opening angle so that the first ray beam can pass through a first tire of a detected vehicle passing through an inspection passage at a preset speed; the second ray unit 312 emits a second ray bundle along a second predetermined opening angle so that the second ray bundle passes through a second tire of the subject vehicle.

The detector device includes a first detector unit 321 disposed corresponding to the first ray unit 311 and a second detector unit 322 disposed corresponding to the second ray unit 312, the first detector unit 321 is configured to receive the first ray bundle passing through the first tire, and the second detector unit 322 is configured to receive the second ray bundle passing through the second tire.

Wherein the radiation source device is arranged at least partly above the road surface of the examination channel, a first detector unit 321 is arranged at a first side of the examination channel and a second detector unit 322 is arranged at a second side of the examination channel. It differs from the embodiment shown in fig. 2 described above in that the first and second radiation units of fig. 2 are arranged next to each other back-to-back, the first and second detector units being arranged opposite each other, whereas in the embodiment of fig. 3 the first and second radiation units are arranged at a predetermined distance L apart along the length of the examination tunnel, and correspondingly the first and second detector units are also arranged at said predetermined distance L apart along the length of the examination tunnel.

Correspondingly, a first side of the first ray unit 311 is provided with a first sensing assembly and a second sensing assembly corresponding to the first side, and the first sensing assembly and the second sensing assembly are used for outputting sensing signals to indicate that a first tire or a third tire (for example, two front tires and a rear tire on the right side) of the detected vehicle enters the inspection channel, and the device 300 controls the first ray unit 311 and the first detector unit 321 to start radiation imaging work of the first tire or the third tire; the second side of the first ray unit 311 is provided with a corresponding third sensing component for outputting a sensing signal indicating that the first tire or the third tire of the detected vehicle is driven away from the inspection passage, and the apparatus 300 controls the first ray unit 311 and the first detector unit 321 to stop the radiation imaging operation of the first tire or the third tire. Similarly, the second side of the second ray unit 312 is provided with a first sensing assembly and a second sensing assembly corresponding to the first sensing assembly and the second sensing assembly, and is used for outputting a sensing signal indicating that a second tire or a fourth tire (for example, two front tires and two rear tires on the left side) of the vehicle to be detected enters the inspection channel, and the system controls the second ray unit 312 and the second detector unit 322 to start the radiation imaging work of the second tire or the fourth tire; the second side of the second ray unit 312 is provided with a corresponding third sensing assembly for outputting a sensing signal indicating that the second tire or the fourth tire of the vehicle under inspection is driven off the inspection passage, and the system controls the second ray unit 312 and the second detector unit 322 to stop the radiation imaging operation of the second tire or the fourth tire.

In the exemplary embodiment, the first ray unit 311 and the second ray unit 312 are both disposed at a middle position of the road surface of the passage to be inspected. However, the present disclosure is not limited thereto, and the present disclosure may be provided on a side close to the road surface of the detected passage.

According to the imaging device for the vehicle safety inspection provided by the embodiment of the invention, the first ray unit and the second ray unit are arranged at a certain distance, for example, the front tire on the right side of the detected vehicle is scanned for radiation imaging firstly, and after a certain time, the front tire on the left side of the detected vehicle is scanned for radiation imaging by the second ray unit, so that the radiation quantity to drivers and passengers can be further reduced.

For other contents in the embodiments of the present invention, reference is made to the above embodiments, which are not repeated herein.

It should be understood that the structures schematically illustrated in fig. 1 to 3 are merely examples of the image forming apparatus for vehicle safety inspection according to the present disclosure, and the present disclosure is not limited thereto. For example, two (or more) detector units and two corresponding radiation units may be disposed on the same side (e.g., right side or left side) of the inspection passage at the same time, and may be used for simultaneous radiation imaging of front and rear tires of the vehicle to be inspected, respectively, and the like.

Fig. 4 schematically illustrates a flow chart of an imaging method for vehicle safety inspection according to an example embodiment of the present disclosure.

As shown in fig. 4, in step S12, the first ray bundle emitted at the first predetermined opening angle passes through the first portion of the subject vehicle passing through the inspection tunnel at the preset speed.

For example, the first portion may be a first tire of the subject vehicle, and the first tire may be either a front tire or a rear tire on the right side or the left side of the subject vehicle.

In step S14, the first radiation beam is received and first radiation intensity data is output.

In step S16, a first radiation image of the first portion is generated from the first ray intensity data.

In step S18, it is determined whether contraband is entrained in the first portion according to the first radiation image.

In an exemplary embodiment, further comprising: when the first part of the detected vehicle is detected to pass through the radiation area in the inspection passage, a preset delay time is passed, and a third part of the detected vehicle is scanned by the first ray beam and is inspected whether forbidden articles are entrained in the third part.

For example, the third portion may be a third tire of the subject vehicle, and the third tire may be a rear tire on the same side as the first tire.

Fig. 5 schematically illustrates a flow chart of an imaging method for vehicle safety inspection according to an example embodiment of the present disclosure.

As shown in fig. 5, in step S22, the first beam of rays exiting along the first predetermined opening angle and the second beam of rays exiting along the second predetermined opening angle simultaneously pass through the first portion and the second portion of the subject vehicle passing through the inspection passage at the preset speed, respectively.

For example, the first portion and the second portion may be a first tire and a second tire of the subject vehicle, respectively, and the first tire and the second tire may be both left and right tires of a front axle of the subject vehicle.

In step S24, the first and second radiation beams are received and first and second radiation intensity data are output, respectively.

In step S26, a first radiation image of the first portion and a second radiation image of the second portion are generated from the first radiation intensity data and the second radiation intensity data, respectively.

In step S28, it is determined whether contraband is entrained in the first portion and the second portion according to the first radiation image and the second radiation image, respectively.

In step S210, the first and second radiation beams simultaneously pass through a third and fourth portion of the subject vehicle, respectively.

For example, the third portion and the fourth portion may be a third tire and a fourth tire of the subject vehicle, respectively, and the third tire and the fourth tire may be left and right tires of a rear axle of the subject vehicle.

In step S212, the first and second radiation beams are received and third and fourth radiation intensity data are output, respectively.

In step S214, a third radiation image of the third portion and a fourth radiation image of the fourth portion are generated according to the third radiation intensity data and the fourth radiation intensity data, respectively.

In step S216, it is determined whether contraband is entrained in the third portion and the fourth portion according to the third radiation image and the fourth radiation image, respectively.

Wherein the steps S28 and S216 can be combined into a single step, namely, after the radiation images of all the tires of a detected vehicle are acquired, the determination is made as to whether the forbidden articles are entrained in the parts.

Fig. 6 schematically illustrates a flow chart of an imaging method for vehicle safety inspection according to an example embodiment of the present disclosure.

As shown in fig. 6, in step S32, the first ray bundle emitted at the first predetermined opening angle passes through the first tire of the subject vehicle passing through the inspection tunnel at the preset speed.

In step S34, the first radiation beam is received and first radiation intensity data is output.

In step S36, a first radiation image of the first tire is generated from the first radiation intensity data.

In step S38, it is determined whether contraband is entrained in the first tire according to the first radiation image.

In step S310, a second beam of rays emitted along a second predetermined opening angle passes through a second tire of the subject vehicle.

Wherein the direction of the second predetermined opening angle is different from the direction of the first predetermined opening angle.

In step S312, the second radiation beam is received and second radiation intensity data is output.

In step S314, a second radiation image of the second tire is generated from the second radiation intensity data.

In step S316, it is determined whether contraband is entrained in the second tire according to the second radiation image.

Those skilled in the art will readily appreciate from the foregoing detailed description that the apparatus and methods according to embodiments of the present invention have one or more of the following advantages.

With the imaging device for vehicle safety inspection and the method thereof, whether contraband is entrained in the tire of a running vehicle can be rapidly inspected through radiation imaging. Can set up different radiation source modules to different motorcycle types, focus carries out safety inspection to passenger car and container vehicle tire.

Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the disclosure is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. An imaging device for vehicle safety inspection, comprising:

the radiation source device comprises a first ray unit, wherein the first ray unit emits a first ray beam along a first preset opening angle so that the first ray beam passes through a first part of a detected vehicle passing through an inspection channel at a preset speed;

the detector device comprises a first detector unit which is arranged corresponding to the first ray unit and is used for receiving the first ray bundle;

wherein the radiation source device is at least partially arranged above a road surface of the inspection channel, the first detector unit being arranged at a first side of the inspection channel;

the radiation source device further comprises:

a second ray unit emitting a second ray bundle along a second predetermined opening angle so that the second ray bundle passes through a second part of the inspected vehicle;

wherein the direction of the second predetermined opening angle is different from the direction of the first predetermined opening angle;

the detector arrangement further comprises:

the second detector unit is arranged corresponding to the second ray unit and used for receiving the second ray bundle;

wherein the second detector unit is arranged at a second side of the examination channel;

the image forming apparatus further includes:

the first sensing assembly is arranged on the first side of the radiation source device and used for outputting a first sensing signal to indicate that the detected vehicle enters the inspection channel;

the image forming apparatus further includes:

the second sensing assembly is arranged between the first sensing assembly and the radiation source device and is used for outputting a second sensing signal to indicate that the first part of the detected vehicle enters a radiation area of the radiation source device and controlling the radiation source device to emit rays with a first dose;

the image forming apparatus further includes:

the first time delay device is connected with the speed sensor and used for setting a first delay time according to the moving speed of the detected vehicle and the size of the first part;

when the second sensing assembly detects that the first part of the detected vehicle enters the radiation area of the radiation source device, outputting a first control signal to control the dose of the rays emitted by the radiation source device to be converted from the first dose to a second dose after the first delay time;

the image forming apparatus further includes:

the second time delay device is connected with the speed sensor and is used for setting a second delay time according to the moving speed of the detected vehicle and the wheel base between the first part and a third part of the detected vehicle;

when the dose of the rays emitted by the radiation source device is converted from the first dose to the second dose, outputting a second control signal to control the dose of the rays emitted by the radiation source device to be converted from the second dose to the first dose after the second delay time;

the image forming apparatus further includes:

the third sensing assembly is arranged on the second side of the radiation source device and used for outputting a third sensing signal to indicate that the first part of the detected vehicle moves away from the radiation area of the radiation source device and controlling the radiation source device to emit rays with a second dose;

wherein the second dose is less than the first dose.

2. The imaging apparatus for vehicle safety inspection according to claim 1, wherein the first detector unit and the second detector unit have a predetermined height;

wherein the predetermined height is determined in accordance with the first predetermined opening angle of the first beam and the second predetermined opening angle of the second beam and the size of the first portion and the second portion.

3. The imaging apparatus for vehicle safety inspection according to claim 1, wherein the first ray unit includes:

a radiation source;

a shield; and

a collimator;

wherein the shield and the collimator are configured to shield rays emitted by the source outside the first predetermined opening angle while constraining a width of the rays.

4. The imaging device for vehicle safety inspection according to claim 1, wherein a portion of the radiation source device is embedded below the road surface of the inspection passage and another portion is exposed from the road surface of the inspection passage, wherein the height of the exposed portion is less than a preset value;

wherein the preset value is related to the ground clearance of the chassis of the detected vehicle.

5. The imaging apparatus for vehicle safety inspection according to claim 4, wherein the exposed portion of the radiation source apparatus has a first height and the radiation source apparatus emits rays having a first energy when the inspected vehicle is of a first vehicle type;

when the detected vehicle is of a second vehicle type, the exposed part of the radiation source device has a second height, and the radiation source device emits rays with second energy;

wherein the first height is less than the second height and the first energy is less than the second energy.

6. The imaging apparatus for vehicle safety inspection according to claim 1, further comprising:

and the speed sensor is used for measuring the moving speed of the detected vehicle in the inspection channel.

7. The imaging apparatus for vehicle safety inspection according to claim 1, wherein the radiation source device is disposed at a center of a road surface of the inspection tunnel, and a target of the first ray unit is disposed above the road surface of the inspection tunnel.

8. The imaging apparatus for vehicle safety inspection according to claim 1, wherein the first predetermined opening angle and the second predetermined opening angle are opposite in direction, and the first detector unit and the second detector unit are oppositely disposed.

9. The imaging apparatus for vehicle safety inspection according to claim 1, further comprising:

the data acquisition and imaging device is connected with the detector device and used for receiving first ray intensity data output by the first ray unit to generate a first radiation image of the first part;

and the judging device is used for judging whether forbidden articles are entrained in the first part or not according to the first radiation image.

10. An imaging method for vehicle safety inspection, comprising:

a first part of the checked vehicle passing through the checking channel at a preset speed is penetrated by a first ray bundle emitted along a first preset opening angle;

receiving the first ray bundle and outputting first ray intensity data;

generating a first radiation image of the first portion from the first ray intensity data;

judging whether forbidden articles are entrained in the first part or not according to the first radiation image;

further comprising:

passing a second portion of the inspected vehicle with a second beam of rays emitted along a second predetermined opening angle;

receiving the second ray bundle and outputting second ray intensity data;

generating a second radiation image of the second portion from the second radiation intensity data;

judging whether forbidden articles are entrained in the second part or not according to the second radiation image;

further comprising:

when the first part of the detected vehicle is detected to pass through the radiation area in the inspection channel, scanning a third part of the detected vehicle with the first ray beam after a preset delay time and inspecting whether forbidden articles are entrained in the third part;

further comprising:

outputting a first sensing signal representing the subject vehicle entering the inspection lane;

outputting a second sensing signal to indicate that the first part of the detected vehicle enters a radiation area of a radiation source device and controlling the radiation source device to emit rays with a first dose;

setting a first delay time according to the moving speed of the detected vehicle and the size of the first part;

setting a second delay time according to the moving speed of the detected vehicle and the wheel base between the first part and a third part of the detected vehicle;

outputting a third sensing signal indicating that the first part of the detected vehicle moves away from the radiation area of the radiation source device and controlling the radiation source device to emit rays with a second dose;

wherein the second dose is less than the first dose.