NL2024027B1 - Security inspection apparatus and security inspection method - Google Patents
Security inspection apparatus and security inspection method Download PDFInfo
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- NL2024027B1 NL2024027B1 NL2024027A NL2024027A NL2024027B1 NL 2024027 B1 NL2024027 B1 NL 2024027B1 NL 2024027 A NL2024027 A NL 2024027A NL 2024027 A NL2024027 A NL 2024027A NL 2024027 B1 NL2024027 B1 NL 2024027B1
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Abstract
The disclosure provides a security inspection apparatus and a security inspection method for inspection of a vehicle. The security inspection apparatus includes at least one bracket defining an inspection passage extending in a first direction, wherein the at least one of the brackets includes a first bracket for scanning the vehicle in a vertical direction. The first bracket includes a top-view type scanning device including a first X—ray accelerator disposed on a top bracket portion of the first bracket, and an scanning field angle of the first X—ray accelerator is between 69 degrees and 120 degrees.
Description
SECURITY INSPECTION APPARATUS AND SECURITY INSPECTION METHOD CROSS-REFERENCE TO RELATED APPLICATION This application claims the priority benefit of the Chinese Patent Application No. 201811832241.2 filed on December 28, 2018 in the National Intellectual Property Administration of China, the whole disclosure of which is incorporated herein by reference.
TECHNICAL FIELD Embodiments of the present disclosure generally relate to technical field of security inspection, and particularly to a security inspection apparatus and a security inspection method.
BACKGROUND At present, security inspection apparatus is more and more widely used in customs and other occasions. Container vehicles need to be quickly inspected and leave the customs. However, as the overall size of the container vehicle is large, the corresponding inspection equipment or apparatus is bulky.
CN107479102 discloses an inspection system implementing an inspection passage for a vehicle to pass through the inspection passage, wherein a bracket defining a portion of the inspection passage includes a top-view type scanning device including one X ray tube of 160kV-450kV or an electron induced accelerator Betatron, to emit X-rays downwards to the inspection passage.
CN208283313 discloses a radiation inspection system having a inspection channel for a vehicle to pass through, and a vertical viewing angle inspection device that performs radiation inspection on the top or bottom surface of the channel.
EP0412190 discloses an apparatus for inspecting containers or vehicles at airports for illegal contents, such as bombs, weapons, drugs or smuggled goods.
US9897716 discloses a vehicle-mounted inspection system comprising a chassis, a rotation mechanism disposed on the chassis and a first and second rayemission device as well as a first detection device connected to the rotation mechanism.
There is a need for a security inspection apparatus that allows the vehicle to pass through the security inspection apparatus quickly. There is a need for a security inspection apparatus that is fully automated and has a reduced size
SUMMARY According to an aspect of the present disclosure, there is provided a security inspection apparatus for inspection of a vehicle that is moving, comprising at least one bracket defining an inspection passage extending in a first direction, wherein the at least one brackets comprises a first bracket for scanning the vehicle in a vertical direction; the first bracket is configured to define a portion of the inspection passage for the vehicle to pass through the inspection passage, and the first bracket includes a top-view type scanning device including a first X-ray accelerator arranged on a top bracket portion of the first bracket, and the first X-ray accelerator is configured to emit X-rays downwards to the portion of the inspection passage defined by the first bracket so as to perform inspection of the vehicle in the inspection passage; wherein the first X-ray accelerator has a field angle in a range between 69 degrees and 120 degrees.
According to an aspect of the present disclosure, the at least one bracket further comprises a second bracket for scanning in a horizontal direction, the second bracket is aligned with and spaced apart from the first bracket in the first direction and is configured to define another portion of the inspection passage for the vehicle to pass through the inspection passage, the second bracket includes a horizontal-view type scanning device including a second X-ray accelerator, and the second X-ray accelerator is disposed on a first vertical side bracket portion of the second bracket and configured to emit X-rays toward the portion of the inspection passage defined by the second bracket so as to perform inspection of the vehicle in the inspection passage.
According to an aspect of the present disclosure, the top-view type scanning device further comprises a first bottom bracket portion detector disposed at a bottom bracket portion of the first bracket and first side bracket portion detectorsrespectively located on a first vertical side bracket portion and a second vertical side bracket portion, which are opposite to each other, of the first bracket, the first bottom bracket portion detector and the first side bracket portion detectors being arranged for receiving a ray signal emitted by the first X-ray accelerator and having transmitted through the vehicle, so as to form a first transmission image of the vehicle; and the horizontal-view type scanning device further includes a second side bracket portion detector disposed on the second vertical side bracket portion, opposite to the first vertical side bracket portion, of the second bracket and a second top bracket portion detector at a top bracket portion of the second bracket, the second side bracket portion detector and the second top bracket portion detector being arranged for receiving a ray signal emitted by the second X-ray accelerator and having transmitted through the vehicle, so as to form a second transmission image of the vehicle.
According to an aspect of the present disclosure, the horizontal-view type scanning device and the top-view type scanning device are relatively fixedly arranged and operatable independently to separately establish an image by receiving respective signals.
According to an aspect of the present disclosure, the security inspection apparatus comprises a plurality of detection devices disposed at one or either side of the inspection passage of the security inspection device at a predetermined spacing in a travelling direction of the vehicle, the plurality of detection devices include: a first detection device and a second detection device spaced apart from each other and configured to measure a speed of the vehicle, wherein the first detection device is located at upstream of the horizontal-view type scanning device and the top-view type scanning device, and configured to establish a contour of the vehicle and to detect leaving of a compartment of the vehicle from the first detection device when the vehicle passes the first detection device, so as to measure the speed of the vehicle by dividing a distance between the first detection device and the second detection device by a time interval for which the vehicle passes by the first detection device and the second detection device, obtain a size of a cab of the vehicle using the speed of the vehicle, determine a position of the cab of the vehicle in the inspection passage and in turn determine time for starting emitting rays of the top-view type scanning device and the horizontal-view type scanning device, ensuring ray emitting of the top-view type scanning device and the horizontal-view type scanning deviceafter the cab has passes by the top-view type scanning device and the horizontal-view type scanning device.
According to an aspect of the present disclosure, the contour of the vehicle is established by the first detection device by detecting a front of the vehicle and finding a boundary between the cab and a compartment of the vehicle.
According to an aspect of the present disclosure, the first detection device is spaced apart from one, closer to the first detection device, of the horizontal- view type scanning device and the top-view type scanning device by a predetermined distance, and configured to: determine, after a predetermined period time T1 since the front of the vehicle passes by the first detection device, that the cab of the vehicle leaves the closer one of the horizontal-view type scanning device and the top-view type scanning device, and trigger the close one to emit a ray beam; and determine, after a predetermined period time T2 since the front of the vehicle passes by the first detection device, the cab of the vehicle leaves the other one of the horizontal-view type scanning device and the top-view type scanning device, and trigger the other one to emit a ray beam.
According to an aspect of the present disclosure, the plurality of detection devices comprise a third detection device located downstream of the first detection device in the travelling direction of the vehicle and configured, together with the first detection device, for correcting the contour and the size of the vehicle obtained by the first detection device, the boundary between the cab and the compartment of the vehicle and the length of the cab; and the third detection device is configured for inspection of a first type of vehicle and arranged such that after the predetermined period time T1 since the front of the first type of vehicle reaches the third detection device, the third detection device, together with the first and second detection device, determines a cab of the first type of vehicle leaves the one, closer to the first detection device, of the horizontal-view type scanning device and the top-view type scanning device, and triggers the closer one to emit a ray beam while ensuring the other one of the horizontal-view type scanning device and the top-view type scanning device not to emit any ray beam.
According to an aspect of the present disclosure, the plurality of detection devices comprises a fourth detection device located downstream of the first detection device in the travelling direction of the vehicle and configured, together withthe first detection device, for correcting the contour and the size of the vehicle obtained by the first detection device, the boundary between the cab and the compartment of the vehicle and the length of the cab; and, the fourth detection device is configured for inspection of a the second 5 type of vehicle and arranged such that after a predetermined period time T1’ since the front of the second type of vehicle reaches the fourth detection device, the fourth detection device, together with the first and second detection device, determines the cab of the second type of vehicle leaves the one, closer to the first detection device, of the horizontal-view type scanning device and the top-view type scanning device and triggers the closer one to emit a ray beam while ensuring the other one of the horizontal-view type scanning device and the top-view type scanning device not to emit any ray beam.
According to an aspect of the present disclosure, the plurality of detection devices comprises a fifth detection device disposed downstream of the third detection device in the travelling direction of the vehicle, provided for inspection of a first type of vehicle and configured in a such way that: after a predetermined period time T3 since the front of the first type of vehicle passes by the first detection device and if the fifth detection device does not detect that the front of the first type of vehicle reaches the fifth detection device, the horizontal-view type scanning device and the top-view type scanning device are stopped from emitting any ray beam; after the predetermined period time T3 since the front of the first type of vehicle passes by the first detection device, the first detection device and the second detection device determine a period time required for passing of the entire vehicle through the one of the horizontal-view type scanning device and the top-view type scanning device closer to the first detection device based on the obtained contour and the size and a determined refreshed speed of the vehicle; and then based on the refreshed speed, it is determined to emit for an extended period time required for completing scan of the vehicle, or until a rear of the vehicle leaves the one of the horizontal-view type scanning device and the top-view type scanning device farther away from the first detection device or even leaves the third detection device, such that the one of the horizontal-view type scanning device and the top-view type scanning device close to the first detection device is stopped to emit.
According to an aspect of the present disclosure, the plurality of detection devices comprises a sixth detection device disposed downstream of the fourth detection device in the travelling direction of the vehicle, provided for inspection of a second type of vehicle and configured in a such way that: after a predetermined period time T3’ since the front of the vehicle passes by the first detection device and if the sixth detection device does not detect the front of the second type of vehicle reaches the sixth detection device, the horizontal-view type scanning device and the top-view type scanning device are stopped from emitting any ray beam; after the predetermined period time T3’ since the front of the first type of vehicle passes by the first detection device, the first detection device and the second detection device determine a period time required for passing of the entire vehicle through the one of the horizontal-view type scanning device and the top-view type scanning device farther away from the first detection device based on the obtained contour, the size and a determined refreshed speed of the vehicle; and then based on the latest speed, it is determined that that an extended period time required for completing scan of the vehicle, or until a rear of the vehicle leaves the one of the horizontal-view type scanning device and the top-view type scanning device farther away from the first detection device or even leaves the fourth detection device, such that the one of the horizontal-view type scanning device and the top-view type scanning device farther away from the first detection device is stopped to emit.
According to an aspect of the present disclosure, the plurality of detection devices comprise a seventh detection device disposed downstream of the third detection device in the travelling direction of the vehicle, and the seventh detection device is configured to allow the one of the horizontal-view type scanning device and the top-view type scanning device farther away from the first detection device to emit when detecting arrival of the front of the vehicle at the seventh detection device.
According to an aspect of the present disclosure, the plurality of detection devices comprise an eighth detection device disposed downstream of the third detection device in the travelling direction of the vehicle, and the eighth detection device is configured to allow the one of the horizontal-view type scanning device and the top-view type scanning device farther away from the first detection device to emitthe ray beam when detecting arrival of the front of the vehicle at the seventh detection device; and wherein the seventh detection device and the eighth detection device are arranged for inspection of different types of vehicles respectively.
According to an aspect of the present disclosure, only under the condition where it is determined by the first detection device and the second detection device that the cab of the vehicle leaves the one of the horizontal-view type scanning device and the top-view type scanning device farther away from the first detection device while it is determined by the seventh detection device or the eighth detection device that the cab of the vehicle leaves the one of the horizontal-view type scanning device and the top-view type scanning device farther away from the first detection device, the one of the horizontal-view type scanning device and the top-view type scanning device farther away from the first detection device is triggered to emit the ray beam.
According to an aspect of the present disclosure, the second detection device is capable of individually measuring the speed of the vehicle during the inspection of the vehicle.
According to an aspect of the present disclosure, the security inspection apparatus is configured to send a warning signal to decelerate or stop the vehicle when the plurality of detection devices detect that the speed of the vehicle exceeds a predetermined threshold.
According to an aspect of the present disclosure, the vehicle itself moves or the vehicle is drawn to move by a traction device of the security inspection apparatus.
According to an aspect of the present disclosure, the top-view type scanning device is disposed at a center of a top of the first bracket such that the first X-ray accelerator is offset from a centerline position of the inspection passage by a distance less than 500 mm.
According to an aspect of the present disclosure, there is provided a security inspection method for inspecting a vehicle using the security inspection apparatus as mentioned above.
BRIEF DESCRIPTION OF THE DRAWINGS Figures 1a, 1b and 1c are schematic views respectively showing a first bracket, a second bracket, and a combination thereof of a security inspection apparatus according to an embodiment of the present disclosure; Figure 2 is a schematic view of an arrangement of a security inspection apparatus according to an embodiment of the present disclosure, in which a broken line 100 schematically represents a first bracket and an X-ray accelerator and a detector thereon, and a broken line 200 schematically represents a second bracket and an X-ray accelerator and a detector thereon; Figure 3 is a schematic view of an arrangement of a security inspection apparatus according to an embodiment of the present disclosure, in which a broken line 100 schematically represents a first bracket and an X-ray accelerator and a detector thereon, and a broken line 200 schematically represents a second bracket and an X-ray accelerator and a detector thereon; Figure 4 is a schematic view of an arrangement of a security inspection apparatus according to an embodiment of the present disclosure, in which a broken line 100 schematically represents a first bracket and an X-ray accelerator and a detector thereon, and a broken line 200 schematically represents a second bracket and an X-ray accelerator and a detector thereon; and Figure 5 shows a schematic view of a top-view type scanning device in a top bracket portion of a first bracket in an embodiment of the present disclosure.
DETAILED DESCRIPTION While the disclosure is not exclusive to various modifications and alternative forms, the specific embodiments of the disclosure are illustrated in the drawings as examples, and will be described in detail herein. However, it is understood that the drawings and their detail description are not intended to limit the present disclosure to specific embodiments, and rather, are intended to cover all modifications, equivalents, and alternatives falling within the spirit and cope of the present disclosure defined by accompanied claims. The drawings are illustrated for illustrative purposes and are therefore not drawn to scale. Terms such as "first", "second", and the like are used in this specification, and are not intended to rank or represent importance or relationships of primary andsecondary, but are intended to distinguish different components. In the present specification, terms such as "top " and "bottom" are orientations of an upper side and a lower side of an object which are normal in a common case.
Various embodiments in accordance with the present disclosure are described below in accordance with the accompanying drawings.
Embodiments of the present disclosure provide a security inspection apparatus for a vehicle, including at least one bracket defining an inspection passage extending in a first direction, wherein the at least one bracket includes a first bracket 100 for a vertical scan. The first bracket 100 defines an inspection passage P extending in the first direction, and the first bracket includes a top-view type scanning device for the vertical scan. The top-view type scanning device includes a first X-ray accelerator 110 disposed at a top bracket portion of the first bracket 100, and the first X-ray accelerator 110 is configured to emit an X-ray downwardly and towards a portion of the inspection passage defined by the first bracket 100 so as to perform an inspection of the vehicle in the inspection passage. In an embodiment, a scanning angle (or called as field angle) of the first X- ray accelerator 110 can be between 69 degrees and 120 degrees. In some specific applications, the X-ray beam emitted by the first X-ray accelerator 110 of the top-view type scanning device has a field angle or scanning angle of 69 degrees, 69.5 degrees, 70 degrees, 75 degrees, 80 degrees, 89 degrees, 90 degrees (e.g., as shown in Figure. 1a) or 95 degrees. It is advantageous for the first X-ray accelerator 110 of the top-view type scanning device to have the field angle or scanning angle of, for example, 69 degrees or a field angle or scanning angle of more than 69 degrees. Since the top-view type scanning device having the large field angle or scanning angle is used, a height of the first bracket of the security inspection apparatus of the present disclosure may be lowered with relative to an existing security inspection apparatus provided with an X-ray accelerator having a field angle or scanning angle less than 69 degrees, and the security inspection apparatus of the present disclosure may emit X-ray to cover a vehicle passing below the first bracket. Thus, according to embodiments of the present disclosure, the first bracket configured with the X- ray accelerator having the field angle or scanning angle of 69 degrees or greater than 69 degrees or greater than 70 degrees has a reduced height with relative to a bracket configured with an X-ray accelerator having a smaller field angle or scanning angle in prior art, and thus the security inspection apparatus has a reduced height and a reduced volume.
The top-view type scanning device is disposed at a center of a top of the scanning channel such that the first X-ray accelerator is offset from a centerline of theinspection passage by a distance no more than 500 mm.
In an embodiment of the present disclosure, as shown in Figure 5, the top- view type scanning device may be disposed at a position offset from the center of the top of the scanning channel, such as at a position that is offset towards left of the center of the top of the scanning channel as shown in Figure 1C. However, it should be understood that the top-view type scanning device may be arranged at a position that is offset towards right of the center of the top of the scanning channel. In the embodiment, the scanning angle of the radiation beam emitted by the top-view type scanning device may be greater than 69 degrees or even greater than 70 degrees, and may of course be less than 70 degrees, such as 69 degrees as shown in Figure 1C, or a field angle of other values.
It should be understood that the security inspection apparatus may include only a second bracket 200. The second bracket 200 includes a horizontal-view type scanning device. A second X-ray accelerator 210 is disposed at a vertical side bracket portion of the second bracket 200 and is configured to emit X-ray toward a portion of the inspection passage defined by the second bracket 200 so as to perform an inspection of a vehicle in the inspection passage.
In an embodiment of the present disclosure, the at least one bracket further includes a second bracket 200 for a horizontal scan, the second bracket 200 and the first bracket 100 are arranged and spaced apart from each other in a first direction. The second bracket 200 is configured to define a portion of the inspection passage so that a vehicle may pass through the inspection passage, and the second bracket 200 includes a horizontal-view type scanning device that includes a second X-ray accelerator 210 disposed at a first vertical side bracket portion 201 of the second bracket 200. The second X-ray accelerator 210 is configured to emit X-ray toward the portion of the inspection passage defined by the second bracket 200 to perform an inspection of the vehicle in the inspection passage.
Figure 1C schematically illustrates an arrangement of the first bracket 100 and the second stent 200. In an embodiment, the X-ray beam emitted by the second X-ray accelerator may have a scanning angle between 60 degrees and 120 degrees. For example, the X-ray beam emitted by the second X-ray accelerator 210 of the horizontal- view type scanning device has a scanning angle of 60 degrees, 64 degrees, 68 degrees, 69 degrees, 70 degrees, 80 degrees, 89 degrees, or 90 degrees, and the like. The X-ray accelerator of the horizontal-view type scanning device has a scanning angle of 60 degrees or more, which is advantageous for reducing a width of the entire second bracket 200 andthe X-ray accelerator, so that the overall size of the entire security inspection apparatus is reduced. In some cases, for example, provision of an inspection passage with a fixed width may allow the horizontal-view type scanning device to obtain more information by scanning; the top-view type scanning device in combination with the horizontal-view type scanning device can prevent missing information about the vehicle. However, in some embodiments, the X-ray beam emitted by the second X-ray accelerator 210 of the horizontal-view type scanning device may have a scanning angle less than 60 degrees, in which the inspection can also be completed.
The present disclosure does not limit the scanning angle of the X-ray beam of the horizontal-view type scanning device. For example, in embodiments of the present disclosure, the at least one bracket of the security inspection apparatus may have a width of about 4 meters and a height of more than 5 meters, and the defined scanning channel P has a width of about 4 meters and a height of 5.2 meters. The top-view type scanning device has a height of about 7 meters. The vertical-view type accelerator is arranged on the top of the first bracket and at the centerline of the scanning channel. It should be understood that the vertical direction accelerator may be disposed near the center line of the scanning channel, instead of being strictly located at the center line of the scanning channel. An offset or divergence to some extent of the position of the vertical-view type accelerator does not seriously affect the imaging quality of a transmitted image, and however, the divergence from the center line of the scanning channel generally does not exceed 500mm.
In an embodiment, the first bracket 100 and the second bracket 200 are individuals separated from each other. The top-view type scanning device of the first bracket 100 and the horizontal-view type scanning device of the second bracket 200 may operate independently or in combination. The positions of the horizontal-view type scanning device and the top-view type scanning device can be set according to actual needs, that is, a distance between the two scanning devices can be set, and the two scanning devices are respectively fixed at respective positions during the inspection.
In the embodiment, the first bracket 100 and the second bracket 200 are separate individuals, which facilitates transportation of the security inspection apparatus because the second bracket 200 and the first bracket 100 can be transported separately, reducing the volume and weight required for transportation. This is especially advantageous for a large security inspection apparatus to make the security apparatus more adaptive.
Figures 1a, 1b and 1c illustrate the first and second brackets 100, 200 and the first and second X-ray accelerators 110, 210 thereof, respectively. It should be notedthat during the inspection process, the two brackets and the accelerators thereof can be arranged as needed.
As shown in Figure 1a, the first X-ray accelerator 110 is disposed at a top of the first bracket 100, and emits a X-ray beam downwardly that has a fanning shape in a plane perpendicular to the first direction; a detector 124 is provided at a bottom bracket portion 104, and detectors 121, 122 are respectively disposed at a first vertical side bracket portion 101 and a second vertical side bracket portion 102 of the first bracket 100. The signals detected by the detectors 124, 121, 122 are used together to establish cross-section information for the vehicle, referred to herein as the first transmission image.
In another embodiment, as shown in Figure 5, the first X-ray accelerator 110 is disposed at a position that is offset towards left of the center of the top of the first bracket 100, and correspondingly, the detectors are respectively arranged on the bottom bracket portion and the right vertical side brackets portion of the first bracket 100, and may form an "L" shaped detector arrangement.
As shown in Figure 1b, the second X-ray accelerator 210 is provided on a first vertical side bracket portion 201 of the second bracket 200, and emits an X-ray beam that has a fanning shape and may be irradiated onto a second vertical side bracket portion 202 and a top bracket portion 203 of the second bracket 200. Detectors 221, 220 are respectively arranged on the vertical side bracket portion 202 and the top bracket portion 203 and used for receiving ray signals that are emitted by the second X-ray accelerator 210 and have been transmitted through the vehicle. The signals detected by the detectors 221, 220 are used together to establish cross-sectional information of the vehicle, referred to herein as a second transmission image.
In an embodiment, in order to obtain a clearer image, the detector on the first bracket 100 may be a detector array. The detector on the second bracket 200 can be an array of detectors.
The first transmission image and the second transmission image may be complete images for inspection of the vehicle, respectively.
In an embodiment, the distance between the first X-ray accelerator and the second X-ray accelerator is less than 3 meters.
The horizontal-view type scanning device and the top-view type scanning device can operate independently of each other. In other words, according to the security inspection apparatus of the embodiments of the present disclosure, the horizontal-view type scanning device can work independently to provide a transmission image of a vehicle in thecase where the top-view type scanning device does not operate; likewise, the top-view type scanning device can work independently to provide a transmission image of a vehicle in the case where the horizontal-view type scanning device does not work. In an embodiment, the vehicle can pass through the inspection passage depending on its own power. In another embodiment, the security inspection apparatus has a traction device for pulling a vehicle to pass through the inspection passage at a constant velocity. In the embodiment in which the vehicle uses its own power to pass through the inspection passage, a driver of the vehicle does not need to stop and get off the vehicle, and instead, the vehicle can directly pass through the inspection passage, thereby facilitating a security inspection operation and saving security inspection time. In the embodiment where the security inspection apparatus is equipped with a traction device to draw the vehicle at a constant speed through the inspection passage, the driver of the vehicle needs to stop and get off the vehicle, and the vehicle's cab can be scanned and a transmission image of the whole vehicle may be obtained.
It is desirable that a vehicle can pass through the inspection passage at a constant velocity, however, the vehicle can pass through the inspection passage at a variable velocity, and the security inspection apparatus of the embodiments of the present disclosure can perform an inspection on a vehicle that is moving at a variable velocity through the inspection passage.
According to embodiments of the present disclosure, the security inspection device includes a plurality of detection devices fixedly arranged along one side or both sides of the inspection passage of the security inspection device in a vehicle-moving direction, and Figures 2-4 illustrate various embodiments of the present disclosure, in which several arrangements for the detection devices along the inspection passage are shown.
As shown in Figure 2, the detection devices include: a first detection device 10 and a second detection device 20 spaced apart by a preset distance and configured to be capable of measuring a speed of a vehicle, wherein the first detection device 10 is located at an upstream position of the horizontal-view type scanning device and the top- view type scanning device and is configured to derive a vehicle contour when the vehicle passes by the first detection device 10, thereby enabling deriving a size of the cab based on the measured vehicle speed and the vehicle travel time, for example, a length of the cab may be derived by multiplying a period time from arrival of a front of the vehicle to leaving of the cab from the first detection device 10 by the traveling speed of the vehicle, etc. In combination with the distance of the first detection device 10 from the first bracket 100, andthe distance between the first bracket 100 and the second bracket 200, a position of the cab of the vehicle in the inspection passage (relative to the first bracket 100 and the second bracket 200) may be determined, thereby controlling time for starting beam emitting of the top-view type scanning device and the horizontal-view type scanning device, respectively, in order that the top-view type scanning device and the horizontal-view type scanning device may respectively emit rays after the cab leaves them, avoiding a person inside the cab from being irradiated. In an embodiment, the first detection device 10 may be a detection device configured for providing a light curtain, for example, including three light sources to cover a height of an entire vehicle. When a vehicle passes, the vehicle blocks light from the light sources, resulting in that a detector of the first detection device 10 cannot receive the light emitted by the light sources, thereby determining the vehicle reaches the position where the first detection device 10 is located. When a gap between the cab of the vehicle and the compartment is passing, the light from the light sources passes through the gap and is received by the detector, thereby determining the gap between the cab of the vehicle and the compartment being passing the position where the first detection device 10 is located. From the above, the general contour of the vehicle may be obtained by the first detector device 10.
In an embodiment, the first detection device 10 may also be a laser scanner that emits laser light and scans in a section plane, perpendicular to the inspection passage, to form a light curtain. When the vehicle passes by the first detection device, the vehicle reflects the laser and the detector of the first detection device detects the reflected laser, thereby determining that the vehicle is passing by the first detection device. In other embodiments, the first detection device may be other types of detection devices.
In the embodiment as shown in Figure 2, the second detection device 20 is disposed at an upstream position of the first detection device 10 (with respect to a travelling direction of the vehicle), and the first detection device 10 is located at an upstream position of the top-view type scanning device of the first bracket 100. The first detection device 10 is configured for determining contour and size of the vehicle when the vehicle passes by the first detection device 10, including detecting the front of the vehicle, finding a boundary between the vehicle cab and the compartment, and detecting the leaving of the vehicle compartment from the first detection device, and is configured to, together with the second detection device 20, measure a speed of the vehicle, that is, obtain the speed of the vehicle by dividing a distance between the first detection device 10 and the second detection device
20 by the period time during which the vehicle passes through the distance between the first detection device 10 and the second detection device 20, thereby the lengths of the cab and the compartment may be obtained.
Specifically, the second detection device 20 emits light in a direction perpendicular to the inspection passage.
When the vehicle reaches the second detection device 20, the light emitted by the second detection device 20 is reflected by the vehicle, and the second detection device 20 receives the light reflected by the vehicle, determining that the vehicle reaches; the vehicle continues to travel so that the light curtain emitted by the first detection device 10 irradiates to the traveling vehicle and thus the arrival of the front of the vehicle can be detected, thereby calculating the speed of the vehicle based on the distance between the first detection device 10 and the second detection device 20 and a time interval, recorded by the security inspection device, between arrivals of the front of the vehicle at the second detection device 20 and the first detection device 10 in sequence.
Herein, the second detection device 20 may include a light sensor, and when the vehicle passes by the second detection device 20, the light sensor detects the arrival of the vehicle.
The second detection device 20 does not have to have a function of measuring speed, and even does not have to scan the light curtain in the plane perpendicular to the inspection passage, and only emits a light beam across the inspection passage, such that when the front of the vehicle is illuminated by the light beam of the second detection device 20, the second detection device 20 can determine the arrival of the front or head; in another embodiment, the second detection device 20 may be also provided with a detector to detect a light beam at the opposite side of the inspection passage such that the arrival of the vehicle can be determined when the front of the vehicle blocks the light beam.
In the embodiment, the second detection device 20 and the firstdetection device 10 together perform the speed measurement of the vehicle.
In an embodiment, the distance from the first detection device 10 to the first bracket 100 having the top-view type scanning device and the distance from the first bracket 100 to the second bracket 200 having the horizontal-view type scanning device in the vehicle traveling direction is preset, and thus, after calculating the speed of the vehicle and determining the time when the front of the vehicle reaches the first detection device 10, the position of the vehicle can be determined by timing: the cab leaves the top-view type scanning device (the first bracket 100) in a predetermined period time T1 after the front of the vehicle passes by the first detection device 10, and at this time the top-view type scanning device is allowed to emit rays to scan the compartment of the vehicle; the cab leaves the horizontal-view type scanning device in a predetermined period time T2 after thefront of the vehicle passes by the first detection device 10, and at this time the horizontal- view type scanning device is allowed to emit rays to scan the compartment of the vehicle. In an embodiment, referring to Figure 2, the plurality of detection devices may further comprise a third detection device 30 located at downstream of the first detection device 10 in the travelling direction of the vehicle, and configured for, together with the first detection device 10, correcting the vehicle contour and size, the boundary of the vehicle cab and the compartment, and the length of the cab obtained by the first detection device
10. The third detection device 30 is not necessary. However, it is advantageous to provide the third detection device 30 during security inspection of vehicles of some fixed types. For example, a distance between the third detection device 30 and the first bracket 100 is arranged such that, when the front of the vehicle reaches the third detection device 30, itis determined that the cab has passed the top-view type scanning device of the first bracket
100. That is, the distance between the third detection device 30 and the first bracket 100 is set to equal to a length of the cab of the vehicles of a fixed type, so that, when the front of the vehicle reaches the third detection device 30, the cab completely passes through the top-view type scanning device of the first bracket 100. For example, the third detection device 30 is used for a first type of vehicle, for example, the first type of vehicle has a cab with a first length. The third detection device 30 may be configured as hardware to directly determine that the cab of the vehicle has passed through the top-view type scanning device, at which time the top-view type scanning device is allowed to emit rays to scan a compartment of the vehicle. However, according to the embodiment, only when the first detection device 10 and the second detection device 20 determine that the vehicle cab leaves the top-view type scanning device, and under the condition where the third detection device 30 determines that the cab of the vehicle has passed through the top-view type scanning device, the top-view type scanning device is allowed to emit rays to scan a compartment of the vehicle, and it is determined the other of the horizontal-view type scanning device and the top-view type scanning device does not emit rays.
In an embodiment, referring to Figure 2, the plurality of detection devices may further include a fourth detection device 40 located at downstream of the first detection device 10 in the travelling direction of the vehicle, and the fourth detection device 40 is arranged to determine the vehicle cab has passed by and left the top-view type scanning device when the front of the vehicle reaches the fourth detection device 40. In the embodiment, the third detection device 30 and the fourth detection device 40 are respectively used for different vehicle types. Herein, the different types of vehicle refer todifferent types of vehicles with different cab lengths, and the third detection device 30 and the fourth detection device 40 are adapted to different types of vehicles, enhancing the adaptability of the security inspection apparatus. For example, the fourth detection device 40 is used for a second type of vehicle having a cab with a second length. According to the embodiment, the one, closer to the first detection device, of the top-view type scanning device and the horizontal-view type scanning device is triggered to emit rays to scan the compartment of the vehicle, and the other of the top-view type scanning device and the horizontal-view type scanning device is ensured to never emit rays under the condition where the first detection device and the second detection device determine that the vehicle cab leaves the top-view type scanning device and the fourth detection device determines that the vehicle cab leaves the top-view type scanning device.
For example, the third detection device 30 is used for inspection of a flat- headed vehicle (first type of vehicle), and the fourth detection device 40 is used for inspection of a long-headed vehicle (second type of vehicle). The lengths of the cabs of the two types of vehicle are different, that is, the length of the cab of the flat-headed vehicle is shorter than that of the long-headed vehicle. Thus, the third detection device 30 and the fourth detection device 40 are in different distances from the first bracket 100. Although the security inspection apparatus can determine that the cab has passed through the top-view type scanning device by the first detection device 10 and the second detection device 20, it can be further confirmed by the dedicated third detection device 30 or the fourth detection device 40 that the cab has passed through the top-view type scanning device for the safety of the driver. After the third detection device 30 confirms the cab of the flat-headed vehicle has passed through the top-view type scanning device or the fourth detection device 40 confirms the cab of the long-headed vehicle has passed through the top-view type scanning device, the security inspection device allows the top-view type scanning device to emit the radiation beam. Such an arrangement is advantageous, and the security inspection apparatus of the embodiment can be applied to both types of vehicles that are commonly used, and even if the speed of the vehicle changes, it is possible to realize a convenient and quick inspection that is safe for the driver.
In the embodiment, the third detection device and the fourth detection device can be regarded as hardware for determining whether the cab has passed through the top- view type scanning device, and the first detection device and the second detection device are also capable of determining whether the cab has passed through the top-view type scanning device. Only under the condition where the above two aspects both determine thecab has passed through the top-view type scanning device, the top-view type scanning device is triggered to emit a ray beam.
For example, when the first detection device and the second detection device determine that the cab has passed through the top-view type scanning device, and however, the third detection device or the fourth detection device does not detect that the front of the corresponding type of vehicle arrives, the top-view type scanning device will not be triggered to emit any ray beam.
When the first detection device and the second detection device does not trigger the top-view type scanning device to emit a ray beam and the third detection device or the fourth detection device detects that the front of the corresponding type of vehicle arrives, the top-view type scanning device will not be triggered to emit any ray beam.
This is advantageous in that, in the security inspection apparatus of the present embodiment, it can be understood that two sets of detection devices are provided for determining whether the cab of the vehicle passes through the top- view type scanning device, and only under the condition where the two sets of detection devices determine that the cab leaves the top-view type scanning device, the top-view type scanning device is triggered to emit a ray beam, thereby ensuring the safety of personnel.
In an embodiment, referring to Figure 2, the plurality of detection devices may further include a fifth detection device 50 disposed at downstream of the first detection device 10 in the travelling direction of the vehicle, and the fifth detection device 50 is configured such that the top-view type scanning device is stopped from emitting in the predetermined period time T3 after the front of the vehicle has passed through the first detection device and if the fifth detection device 50 does not detect arrival of the front of the vehicle. after lapse of the predetermined period time T3 since the front head of the vehicle passes through the first detection device 10, the first detection device 10 and the second detection device 20 are used to determine a period time required for the entire vehicle to pass through the top-view type scanning device based on the obtained vehicle contour and size and the latest vehicle speed provided by a group of sensors.
According to the embodiment, if the vehicle does not reach the fifth detection device 50 within the predetermined period time T3, it indicates that the vehicle will be still at a position close to the ray for a long time and, in order to ensure that the driver's single radiation absorbed dose meets a criterion, the horizontal-view type scanning device and the top-view type scanning device both stop emitting ray beam in a short time, interrupting the scanning process.
If the vehicle reaches the fifth detection device 50 within the predetermined period time T3, it indicates that the driver has been far away from the ray and a driver protection is not needed to be triggered,
and the scan process continues normally. Subsequently, the security inspection apparatus will continue to emit a ray beam for a period time required for the vehicle to complete the scan according to the latest vehicle travel speed measured by the sensor combination, or until the vehicle's rear leaves the one, away from the first detection device, of the horizontal-view type scanning device and the vertical-view type scanning device, or even until the vehicle's rear leaves the third detection device, and then the re-emitting of top-view type scanning device is stopped. During the security inspection, the safety and protection of personnel is important. As the speed of the vehicle may vary and thus scan of the vehicle may be not completed within the calculated period time, it is advantageous to provide the fifth detection device 50 to ensure that the emission of the ray beam is stopped. Here, when the top-view type scanning device stops emitting, it may be ensured that the horizontal-view type scanning device does not emit a ray beam. In the embodiment, the fifth detection device 50 is located at downstream of the fourth detection device 40 in the travelling direction of the vehicle.
In an embodiment, the detection devices further include a sixth detection device 60 located downstream of the first detection device 10 in the travelling direction of the vehicle, and the sixth detection device 60 is configured such that the horizontal- view type scanning device and the top-view type scanning device are both stopped from emitting rays after a predetermined period time T3’ since the front of the vehicle pass through the first detection device and if the sixth detection device 60 does not detect arrival of the front of the vehicle (at this time, the top-view type scanning device may have stop emitting; however, it is still required to determine that the top-view type scanning device stops emitting in order to avoid any erroneous operation). After the predetermined period time T3 since the front of the vehicle passes through the first detection device 10, the first detection device 10 and the second detection device 20 are used to determine a period time required for the entire vehicle to pass through the horizontal-view type scanning device based on the obtained vehicle contour and size and the latest vehicle speed provided by the group of sensors. The security inspection apparatus will continue to emit a ray beam for a period time required for the vehicle to complete the scan according to the latest vehicle travel speed measured by the sensor combination, or until the vehicle's rear leaves the one, away from the first detection device, of the horizontal-view type scanning device and the top-view type scanning device, or even until the vehicle's rear leaves the third detection device, and then there-emitting of horizontal-view type scanning device is stopped. In the embodiment, the sixth detection device 60 is located at downstream of the fifth detection device 50 in the travelling direction of the vehicle.
In an embodiment of the present disclosure, as shown in Figure 3, in addition to the third detection device 30, configured for determining that the cab of the flat-headed vehicle has passed through the top-view type scanning device so as to allow to trigger emitting of the top-view type scanning device, and the fourth detection device, configured for determining that the cab of the long-headed vehicle has passed through the top-view type scanning device so as to allow to trigger emitting of the top- view type scanning device, the detection devices further includes a seventh detection device 70 and an eighth detection device 80. The seventh detection device 70 is located downstream of the third detection device 30, and is configured to determine that the cab of the first type of vehicle, such as a short-headed vehicle (e.g., a flat- headed vehicle), has passed through the horizontal-view type scanning device so as to allow to trigger emitting of the horizontal-view type scanning device. The eighth detection device 80 is located downstream of the fourth detection device 40 and is configured to determine a cab of a second type of vehicle, for example a long-headed vehicle (e.g., a long-headed vehicle) has passed through the horizontal-view type scanning device so as to allow to trigger emitting of the horizontal-view type scanning device.
In the embodiment, it should be understood that the flat-headed vehicle and the long-headed vehicle are examples of two different types of vehicles. The third and the fourth detection device 30, 40, and the seventh and the eighth detection device 70, 80 can be used for two other types of vehicles, respectively.
In the embodiment, only under the condition where the seventh detection device 70 or the eighth detection device 80 determines that the cab leaves the horizontal-view type scanning device, and the first detection device 10 and the second detection device 20 determine that the cab leaves the horizontal-view type scanning device, the security inspection apparatus can determine that the cab leaves the horizontal-view type scanning device. For example, in a situation where the first detection device 10 and the second detection device 20 determine that the cab has left the horizontal-view type scanning device, and however, the seventh detection device 70 or the eighth detection device 80 does not detect arrival of the front of the corresponding type of vehicle, emitting of ray beam is not triggered. In this situation,
for example, the vehicle may be slowed down or stopped, be in malfunction, or the like.
For example, when there is not received a signal that indicates the first detection device 10 and the second detection device 20 allow the horizontal-view type scanning device to emit a ray beam, the horizontal-view type scanning device is not triggered to emit even if the seventh detection device 70 or the eighth detection device 80 detects arrival of the front of the corresponding type of vehicle.
In another embodiment of the disclosure, the plurality of detection devices include all the detection devices as shown in Figure 2, and further include a seventh detection device 70 and an eighth detection device 80 as shown in Figure 3 to trigger emitting operation of or stop emitting operation of the top-view type scanning device and the horizontal-view type scanning device, ensuring no ray harm to the personnel in the cab during rapid inspection of the vehicle.
In an embodiment of the disclosure, as shown in Figure 4, the first detection device 10 is mounted upstream of the top-view type scanning device (the first bracket 100) in the travelling direction and spaced apart by a fixed distance.
The first detection device 10 emits a laser beam and detects the reflected laser light to obtain information of an object illuminated by the laser, which information can be used to identify a type of the detected vehicle.
In an embodiment, the second detection device 20 may independently measure the speed of the vehicle and the position of the vehicle or the like without depending on the first detection device 10. The second detection device 20 may be located downstream of the horizontal-view type scanning device (the second bracket 200) in the embodiment.
When the vehicle is travelling toward the security inspection device, the second detection device directly measures the speed of the vehicle independently, and can also monitor the speed of the vehicle in real time.
The second detection device is configured to monitor the speed of the vehicle throughout a process of the inspection of the vehicle.
In an embodiment, the second detecting device may emit a plurality of laser beams.
For example, the plurality of laser beams divide the inspection passage into a plurality of regions, for example, dividing one area every one meter, and the plurality of laser beams extend in directions perpendicular to the inspection passage and form a plurality of virtual light curtains by way of scanning for positioning a vehicle which reaches or leaves the virtual light curtains and thus for calculating a speed of the vehicle.
It is advantageous in the embodiment in that the detection of the contour of the vehicle, the measurement of the speed of the vehicle and the positioning of thevehicle can be achieved by using the first detection device 10 and the second detection device 20, thereby allowing the security inspection apparatus to control the top-view type scanning device and/or the horizontal-view type scanning device, such as, to emit a ray beam or stop emitting a ray beam, and thus achieving a convenient operation in practical applications.
Specifically, as shown in Figure 4, when the vehicle travels and enters the inspection passage, the second detection device 20 can measure the speed of the vehicle; when the front of the vehicle reaches the first detection device 10, the first detection device records the time t0; when a joint/boundary between the cab and the compartment of the vehicle is passing through the first detection device 10 (that is, the cab just passes through and leaves the first detection device 10), the time t0' is recorded, and at this time, a length of the cab can be calculated based on the speed of the vehicle, in combination with the time tO and t0'. When the vehicle continues to travel, since the distance between the first detection device 10 and the first bracket 100, the distance between the first bracket 100 and the second bracket 200, the speed of the vehicle and the cab length are known, it can be determined by timing whether the front of the vehicle reaches the top-view type scanning device, whether the cab leaves the top-view type scanning device, whether the front of the vehicle reaches the horizontal-view type scanning device, whether the cab reaches the horizontal-view type scanning device, and whether the cab leaves the horizontal-view type scanning device. In fact, by measuring the time when the cab leaves the top-view type scanning device and the time when the cab leaves the horizontal-view type scanning device, the security inspection device can determine the position of the boundary between the cab and the compartment of the vehicle, thereby controlling the time at which the top- view type scanning device begins to emit and the time at which the horizontal-view type scanning device begins to emit as the cab of the vehicle leaves the horizontal- view type scanning device.
In the embodiment, the contour, size, speed and position of any types of vehicles can be determined by relative less detection devices, and the vehicle is allowed to quickly pass through the inspection passage, completing the security inspection, without requiring the driver to get off the vehicle while preventing the driver from being irradiated by the radiation.
In an embodiment, the security inspection apparatus is configured to issue a warning signal so as to decelerate or stop the vehicle when the plurality ofdetection devices detect that the vehicle speed exceeds a predetermined threshold.
In order to protect the security inspection apparatus, the moving speed of the vehicle is limited, because the transmission image obtained will be distorted when the moving speed of the vehicle is too fast.
Thus, the security inspection apparatus is provided with a vehicle speed threshold such that, when a vehicle speed exceeds the threshold, the security inspection apparatus will issue a warning signal, such as alarm sound, to warn a driver to stop and re-enter the security inspection apparatus or slow down the vehicle to ensure a normal security inspection.
The security inspection apparatus according to embodiments of the present disclosure may have two inspection modes, the first inspection mode corresponding to an arrangement of the first bracket 100 and the second bracket 200 in this order (in terms of the travelling direction of the vehicle) and the second inspection mode corresponding to an arrangement of the second bracket 200 (at upstream) and the downstream first bracket 100(at downstream) in this order in the travelling direction.
In the above embodiments, the first inspection mode is described, and the second inspection mode is similar to the first inspection mode, and details for the second inspection mode are not described herein repeatedly.
According to embodiments of the disclosure, a process of performing the inspection by using the security inspection device is substantially as follows: when the vehicle is travelling toward the security inspection device, the sensor(s) on the vertical side bracket portion of the security inspection device detects the vehicle, (for example) a controller of the security inspection device receives a plurality of signals from the sensor(s) and determines whether the vehicle reaches the first bracket 100 and the second bracket 200 or not; when the vehicle cab has left the first bracket 100, the top-view type scanning device is controlled to emit a ray beam to scan a compartment of the vehicle; when the cab of the vehicle leaves the second bracket 200, the horizontal-view type scanning device is controlled to emit a ray beam to scan the compartment of the vehicle; when a rear of the vehicle leaves the third detection device 30 or the delay time calculated according to a contour and a size of the vehicle and the vehicle speed arrives, the top-view type scanning device is controlled to stop emitting; when the rear of the vehicle leaves the fourth detection device 40 or the delay time calculated according to the contour and the size of the vehicle and the speed of the vehicle arrives, the horizontal-view type scanning device is controlled to stop emitting.
Although some embodiments of the present general inventive concept have been shown and described, it will be understood by those of ordinary skill in the art that modifications may be made to these embodiments without departing from the principles and spirit of the present general inventive concept.
The scope is defined by the claims and their equivalents
Claims (18)
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| CN201811632241.2A CN109828310A (en) | 2018-12-28 | 2018-12-28 | Rays safety detection apparatus and safety inspection method |
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| CN109828310A (en) * | 2018-12-28 | 2019-05-31 | 同方威视技术股份有限公司 | Rays safety detection apparatus and safety inspection method |
| CN112946769A (en) * | 2019-12-11 | 2021-06-11 | 清华大学 | Security check equipment, security check method and warehousing system |
| CN113805251A (en) * | 2021-08-25 | 2021-12-17 | 北京营加品牌管理有限公司 | Method for detecting trailer towing state of motor home |
| CN114152994A (en) * | 2021-12-31 | 2022-03-08 | 同方威视科技（北京）有限公司 | Security check equipment, security check system and security check method |
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| CN109828310A (en) | 2019-05-31 |
| PL439130A1 (en) | 2023-01-02 |
| WO2020134127A1 (en) | 2020-07-02 |
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