CN114764074A - Radiation inspection system and radiation inspection method - Google Patents

Radiation inspection system and radiation inspection method Download PDF

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CN114764074A
CN114764074A CN202011642948.9A CN202011642948A CN114764074A CN 114764074 A CN114764074 A CN 114764074A CN 202011642948 A CN202011642948 A CN 202011642948A CN 114764074 A CN114764074 A CN 114764074A
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radiation
inspection
detected object
avoided
radiation inspection
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芮晓亮
王永明
许艳伟
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Nuctech Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects

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Abstract

A radiation inspection system and method are provided. The radiation inspection system includes: a radiation imaging device; the detection devices are respectively arranged at a plurality of preset positions at the downstream of the radiation inspection position, the distances between the preset positions and the radiation inspection position along the travel direction defined by the inspection channel are different, and the detection devices are respectively used for detecting a plurality of moments when the front end of the part to be avoided of the inspected object reaches the corresponding preset positions and sending a plurality of detection signals respectively comprising a plurality of moments; and a control device. The control device is configured to: determining the types of the detected objects, wherein the lengths of the parts needing to be avoided of the different types of the detected objects are different; receiving detection signals sent by detection devices corresponding to different types of detected objects in response to the different types of detected objects; and issuing an instruction for controlling the radiation imaging apparatus to emit the radiation beam at a predetermined time interval after the timing included in the detection signal.

Description

Radiation inspection system and radiation inspection method
Technical Field
The present disclosure relates to the field of security inspection technologies, and in particular, to a radiation inspection system and a radiation inspection method.
Background
At present, a high-energy radiation device is used for scanning and checking targets moving at high speed, such as vehicles and the like, and the scanning and checking can be carried out under the condition that a driver of the vehicle does not get off the vehicle. In the non-stop safety inspection process, partial avoidance needs to be carried out on the detected vehicle to ensure the personal safety of personnel. For example, during passage of the cab of the vehicle through the radiation inspection system, the rays are emitted at a lower dose or not; after the cab of the vehicle passes through the set position, the radiation inspection system emits beams normally, and scanning is carried out on the carriage part loaded with cargos.
Disclosure of Invention
To address at least one aspect of the above-described problems, embodiments of the present disclosure provide a radiation inspection system and a radiation inspection method.
In one aspect, a radiation inspection system is provided for radiation inspection of an object under inspection traveling along a direction of travel defined by an inspection lane, wherein the object under inspection includes a portion to be inspected and a portion to be avoided, the radiation inspection system comprising:
the radiation imaging device is arranged at a radiation inspection position of the inspection channel and used for emitting radiation beams to scan the inspected object and generate a radiation image;
a plurality of detection devices respectively arranged at a plurality of preset positions downstream of the radiation inspection position, wherein the distances between the preset positions and the radiation inspection position along the travel direction defined by the inspection channel are different, and the detection devices are respectively used for detecting a plurality of moments when the front end of the part to be avoided of the inspected object reaches the corresponding preset positions and sending out a plurality of detection signals respectively comprising the moments; and
a control device in communication with the radiation imaging device and the plurality of detection devices, respectively,
wherein the control device is configured to: determining the types of the detected objects, wherein the lengths of the parts needing to be avoided of the detected objects of different types are different; receiving detection signals sent by detection devices corresponding to different types of detected objects in response to the different types of detected objects; and issuing an instruction for controlling the radiation imaging apparatus to emit the radiation beam at a predetermined time interval after the timing included in the detection signal.
According to some exemplary embodiments, the plurality of detection means comprises at least a first detection means arranged at a first preset position downstream of the radiation inspection position in the direction of travel defined by the inspection channel and a second detection means arranged at a second preset position downstream of the first detection means in the direction of travel defined by the inspection channel; the types of the detected objects at least comprise a first type and a second type, and the length of the part needing to be avoided of the detected objects of the first type is smaller than that of the part needing to be avoided of the detected objects of the second type; and the first detection device corresponds to the first type of detected object, and the second detection device corresponds to the second type of detected object.
According to some exemplary embodiments, the first detecting device is configured to detect a first time when a front end of the to-be-avoided part of the first type of object to be detected reaches the first preset position, and send out a first detection signal including the first time; the control device is configured to: receiving a first detection signal emitted by the first detection device in response to a first type of detected object; and issuing an instruction for controlling the radiation imaging apparatus to emit the radiation beam at a first predetermined time interval T1 after the first time.
According to some exemplary embodiments, the second detecting device is configured to detect a second time when the front end of the portion, which needs to be avoided, of the second type of object to be detected reaches the second preset position, and send a second detection signal including the second time; the control device is configured to: receiving a second detection signal emitted by the second detection device in response to a second type of detected object; and passing a second predetermined time after the second timeTime interval T2And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
According to some exemplary embodiments, the determining the type of the detected object includes: when the length of the part needing to be avoided of the detected object is smaller than a length threshold value, determining that the type of the detected object is a first type; and when the length of the part needing to be avoided of the detected object is larger than or equal to the length threshold value, determining that the type of the detected object is a second type.
According to some exemplary embodiments, the radiation inspection system further comprises a speed measuring device for detecting a travelling speed V of the object under inspection in the inspection tunnel.
According to some exemplary embodiments, the first predetermined time interval T1Satisfies the following relation:
Figure BDA0002880832660000031
wherein Lc is the length of the part of the current detected object needing to be avoided, LSE is the radiation protection safety distance of the radiation inspection system, and LS is the distance between the radiation inspection system and the part needing to be avoided1A distance between the first detection device and the radiation inspection position along a travel direction defined by the inspection channel.
According to some exemplary embodiments, the second predetermined time interval T2Satisfies the following relation:
Figure BDA0002880832660000032
wherein LS2A distance between the second detection device and the radiation inspection position along a travel direction defined for the inspection channel.
According to some exemplary embodiments, the first predetermined time interval T1And said second predetermined time interval T2Are substantially equal.
According to some exemplary embodiments, the plurality of detection devices comprises n detection devices, n being largeA natural number equal to 3, the n detection devices are sequentially arranged at n preset positions downstream of the radiation inspection position along the travel direction defined by the inspection channel, the distance between the n preset positions and the radiation inspection position along the travel direction defined by the inspection channel is sequentially increased, wherein the ith detection device is used for detecting the time t when the front end of the part needing to be avoided of the inspected object reaches the ith preset positioniAnd sending out a message including said time tiWherein i is not less than 1 and not more than n and i is a natural number.
According to some exemplary embodiments, the control device is configured to: when LC0 is not less than LC < LS1When the detected object is determined to be a first type of detected object, where Lc is the length of the portion of the detected object to be avoided, Lc0 is the minimum length of the portion of the detected object to be avoided that needs to be detected by the radiation inspection system, and LS is the minimum length of the portion of the detected object to be avoided that needs to be detected by the radiation inspection system1For the distance between a first detection device, which is the one of the n detection devices closest to the radiation inspection position, and the radiation inspection position in the travel direction defined by the inspection channel, LS1Greater than LC 0; responding to a first type of detected object, receiving a first detection signal sent by the first detection device, wherein the first detection signal comprises the time t when the front end of the part needing to be avoided of the detected object reaches the first preset position1(ii) a And at said time t1After a first predetermined time interval T1And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
According to some exemplary embodiments, the control device is configured to: when LS isj-1≤Lc＜LSjThen, the detected object is determined to be the j-th type of detected object, wherein LSjDistance between the jth detection device and the radiation inspection position along the travel direction defined by the inspection channel, LSj-1Is the distance between the j-1 th detection device and the radiation inspection position along the travel direction defined by the inspection channel, wherein j is more than or equal to 2 and less than or equal to n, j is a natural number, LSjGreater than LSj-1(ii) a Receiving in response to the j-th type of detected objectA jth detection signal sent by the jth detection device, wherein the jth detection signal includes a time t when a front end of a part needing to be avoided of the detected object reaches the jth preset positionj(ii) a And at said time tjAfter a predetermined time interval TjAnd issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
According to some exemplary embodiments, the first predetermined time interval T1Satisfies the following relation:
Figure BDA0002880832660000041
wherein V is the traveling speed of the detected object in the inspection channel.
According to some exemplary embodiments, the predetermined time interval T isjSatisfies the following relation:
Figure BDA0002880832660000042
wherein V is the traveling speed of the detected object in the inspection channel.
According to some exemplary embodiments, LS1LC0+ LSE, where LSE is the radiation protection safety distance of the radiation inspection system.
According to some exemplary embodiments, a distance between any two adjacent ones of the n detection arrangements along a direction of travel defined by the inspection lane is substantially equal to LSE.
According to some exemplary embodiments, the heights of the plurality of detection devices from a reference plane, which is a plane where the object to be inspected comes into contact with the inspection passage, are substantially equal.
According to some exemplary embodiments, the height of the plurality of detection devices from the reference plane is smaller than the height of the top surface of the portion to be avoided of each type of object to be detected, which needs to be detected by the radiation inspection system, from the reference plane.
According to some exemplary embodiments, the plurality of detection means comprises at least one selected from a photoelectric switch, a light curtain and a ground induction coil.
According to some exemplary embodiments, the object to be detected is a vehicle, and the portion to be avoided is a head portion including at least a cab of the vehicle.
According to some exemplary embodiments, the first type of detected object is a flathead vehicle or a short-head vehicle, and the second type of detected object is a long-head vehicle.
In another aspect, there is provided a radiation inspection method for performing radiation inspection on an object to be inspected traveling in a traveling direction defined by an inspection passage, wherein the object to be inspected includes a portion to be inspected and a portion to be avoided, and a radiation imaging device is provided at a radiation inspection position of the inspection passage, the radiation inspection method comprising:
the detection devices are respectively used for detecting a plurality of moments when the front end of the part needing to be avoided of the detected object reaches a corresponding preset position and sending out a plurality of detection signals respectively comprising the moments, wherein the detection devices are respectively arranged at a plurality of preset positions at the downstream of the radiation inspection position, and the distances between the preset positions and the radiation inspection position along the travel direction defined by the inspection channel are different;
determining the types of the detected objects, wherein the lengths of the parts needing to be avoided of the detected objects of different types are different;
receiving detection signals sent by detection devices corresponding to different types of detected objects in response to the different types of detected objects; and
issuing an instruction for controlling the radiation imaging apparatus to emit a radiation beam at a predetermined time interval after a time included in the detection signal;
and controlling the radiation imaging device to emit radiation beams in response to the instructions, scanning the detected object and generating a radiation image.
According to some exemplary embodiments, the plurality of detection means comprises at least a first detection means arranged at a first preset position downstream of the radiation inspection position in the direction of travel defined by the inspection channel and a second detection means arranged at a second preset position downstream of the first detection means in the direction of travel defined by the inspection channel; the types of the detected objects at least comprise a first type and a second type, and the length of the part needing to be avoided of the detected objects of the first type is smaller than that of the part needing to be avoided of the detected objects of the second type; and the first detection device corresponds to the first type of detected object, and the second detection device corresponds to the second type of detected object.
According to some exemplary embodiments, the first detecting device is configured to detect a first time when a front end of the portion to be avoided of the first type of object to be detected reaches the first preset position, and send a first detection signal including the first time;
the radiation inspection method includes: receiving a first detection signal emitted by the first detection device in response to a first type of detected object; and a first predetermined time interval T after said first moment in time1And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
According to some exemplary embodiments, the second detecting device is configured to detect a second time when the front end of the to-be-avoided part of the second type of detected object reaches the second preset position, and send a second detection signal including the second time; the radiation inspection method includes: receiving a second detection signal emitted by the second detection device in response to a second type of detected object; and a second predetermined time interval T after said second moment in time2And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
According to some exemplary embodiments, the determining the type of the detected object includes: when the length of the part needing to be avoided of the detected object is smaller than a length threshold value, determining that the type of the detected object is a first type; and when the length of the part needing to be avoided of the detected object is larger than or equal to the length threshold value, determining that the type of the detected object is a second type.
According to some exemplary embodiments, the radiation inspection method further comprises: and detecting the traveling speed V of the detected object in the inspection channel.
According to some exemplary embodiments, said first predetermined time interval T1Satisfies the following relation:
Figure BDA0002880832660000071
wherein Lc is the length of the part of the detected object to be avoided, LSE is the radiation protection safety distance of the radiation inspection system, and LS is the length of the part of the detected object to be avoided1A distance between the first detection device and the radiation inspection position along a travel direction defined by the inspection channel.
According to some exemplary embodiments, the second predetermined time interval T2Satisfies the following relation:
Figure BDA0002880832660000072
wherein LS2A distance between the second detection device and the radiation inspection position along a travel direction defined by the inspection channel.
According to some exemplary embodiments, the plurality of detection devices includes n detection devices, n is a natural number greater than or equal to 3, the n detection devices are sequentially arranged at n preset positions downstream of the radiation inspection position along a travel direction defined by the inspection channel, and distances between the n preset positions and the radiation inspection position along the travel direction defined by the inspection channel are sequentially increased, wherein the ith detection device is used for detecting a time t when a front end of a portion to be avoided of the inspected object reaches the ith preset positioniAnd sending out a message including said time tiWherein i is not less than 1 and not more than n and i is a natural number.
According to some exemplary embodiments, the radiation isThe inspection method comprises the following steps: when LC0 is not less than LC < LS1When the detected object is determined to be a first type of detected object, where Lc is the length of the portion of the detected object to be avoided, Lc0 is the minimum length of the portion of the detected object to be avoided that needs to be detected by the radiation inspection system, and LS is the minimum length of the portion of the detected object to be avoided that needs to be detected by the radiation inspection system1For the distance between a first detection device, which is the one of the n detection devices closest to the radiation inspection position, and the radiation inspection position in the travel direction defined by the inspection channel, LS1Greater than LC 0; responding to a first type of detected object, receiving a first detection signal sent by the first detection device, wherein the first detection signal comprises a moment t when the front end of the part needing to be avoided of the detected object reaches the first preset position1(ii) a And at said time t1After a first predetermined time interval T1And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
According to some exemplary embodiments, the radiation inspection method includes: when LSj-1 is not less than Lc < LSjThen, the detected object is determined to be the j-th type of detected object, wherein LSjFor the distance between the jth detection device and the radiation inspection position in the travel direction defined by the inspection channel, LSj-1Is the distance between the j-1 th detection device and the radiation inspection position along the travel direction defined by the inspection channel, wherein j is more than or equal to 2 and less than or equal to n, j is a natural number, LSjGreater than LSj-1(ii) a Responding to the jth type of detected object, and receiving a jth detection signal sent by the jth detection device, wherein the jth detection signal comprises the time t when the front end of the part needing to be avoided of the detected object reaches the jth preset positionj(ii) a And at said time tjAfter a predetermined time interval TjAnd issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
According to some exemplary embodiments, said first predetermined time interval T1Satisfies the following relation:
Figure BDA0002880832660000081
wherein V is the traveling speed of the detected object in the inspection channel.
According to some exemplary embodiments, the predetermined time interval T isjSatisfies the following relation:
Figure BDA0002880832660000082
wherein V is the traveling speed of the detected object in the inspection channel.
According to some exemplary embodiments, LS1LC0+ LSE, where LSE is the radiation protection safety distance of the radiation inspection system.
According to some exemplary embodiments, a distance between any two adjacent ones of the n detection arrangements along a direction of travel defined by the inspection lane is substantially equal to LSE.
The radiation inspection system provided by the embodiment of the disclosure can safely avoid the vehicle heads with various vehicle head lengths, and can ensure complete radiation scanning of the following cargos, namely, the safety of vehicle head avoidance and the integrity of cargo scanning are realized at the same time.
Drawings
Other objects and advantages of the present disclosure will become apparent from the following description of the disclosure, which is made with reference to the accompanying drawings, and can assist in a comprehensive understanding of the disclosure.
FIG. 1A is a schematic view of a radiation inspection system for rapid inspection of vehicles;
FIG. 1B is a schematic view of a radiation inspection system for rapid inspection of vehicles;
FIG. 2 is a schematic block diagram of a radiation inspection system according to an embodiment of the present disclosure;
FIG. 3 is a state diagram of use of a radiation inspection system according to an embodiment of the present disclosure;
FIGS. 4A, 4B and 4C show schematic profiles of three different types of vehicles, respectively;
FIG. 5 is a top plan view of the radiation inspection system of FIG. 3;
FIG. 6 is a state diagram of use of a radiation inspection system according to an embodiment of the present disclosure, wherein the plurality of detection devices may include more than 3 detection devices; and
fig. 7 is a flow chart of a radiation inspection method according to an embodiment of the present disclosure.
It is noted that, for the sake of clarity, in the drawings used to describe embodiments of the present disclosure, structures or regions may be enlarged or reduced in size, i.e., the drawings are not drawn to actual scale.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art. The use of "first," "second," and the like in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items.
In this document, unless specifically stated otherwise, directional terms such as "upper", "lower", "left", "right", "inside", "outside", and the like are used to indicate orientations or positional relationships based on the orientation shown in the drawings, merely for convenience in describing the present disclosure, and do not indicate or imply that the referenced device, element, or component must have a particular orientation, be constructed or operated in a particular orientation. It should be understood that when the absolute positions of the objects to be described are changed, the relative positional relationships they represent may also change accordingly. Accordingly, these directional terms should not be construed as limiting the present disclosure.
In an embodiment of the present disclosure, the object to be inspected may include a portion to be inspected and a portion to be avoided, where the portion to be inspected is a portion of the object to be inspected, which needs to be subjected to radiation inspection by using a radiation imaging apparatus, and the portion to be avoided may refer to a portion of the object to be inspected, which is not suitable for radiation inspection by using the radiation imaging apparatus. For the portion to be avoided, other methods may be used for inspection, or the radiation imaging device may be used to emit a different radiation beam (e.g., a low dose radiation beam) than the portion to be inspected.
In an embodiment of the present disclosure, the object to be inspected may be a vehicle, for example, a cargo-carrying vehicle, such as a truck, a trailer, a cargo train, or the like, in which case, the portion to be inspected is a cargo loading portion, and the portion to be avoided is a cab portion including at least an area where a driver is located.
In the embodiment of the present disclosure, the inspection passage may be a passage such as a road or a track through which the vehicle travels, or may be a dedicated passage provided for detection. The inspection lane may be a one-way lane whose direction of travel is uniquely determined. Herein, as for both the front and rear sides of any one position a on the inspection passage, it is set that the side where the vehicle passes first when traveling in the traveling direction is referred to as the upstream side of the position a, and the side where the vehicle passes later is referred to as the downstream side of the position a. Thus, for the radiation inspection position on the inspection passage, the vehicle passes upstream of the radiation inspection position first and downstream of the radiation inspection position later in the traveling direction.
In this context, unless otherwise specified, the expression "longhead vehicle" means a vehicle in which the engine is located in front of the cab, and such a longhead vehicle is characterized in that the engine is located in front of the cab, the front end of the cab protrudes, there is a separate engine compartment and a separate hood, and the engine compartment and the cab together form the head portion. The expression "flathead" denotes a vehicle in which the engine is located in the cab, which flathead is characterized by the fact that the engine is located in the middle between the driver's and co-driver's seats, the front end of the cab does not need to protrude, there is no separate engine compartment, and the cab forms the head part. The expression "short-head vehicle" denotes a vehicle in which one part of the engine is located in front of the cab and the other part is located in the cab, and this short-head vehicle is characterized in that the engine protrudes largely in front of the cab, the engine has a separate engine compartment and a separate hood, and the engine compartment and the cab together form the head part. It should be understood that the length of the head portion of the long head vehicle is greater than the length of the head portion of the flathead vehicle, and the length of the head portion of the short head vehicle intervenes between the long head vehicle and the flathead vehicle.
Embodiments of the present disclosure provide a radiation inspection system and a radiation inspection method for performing radiation inspection on an object to be inspected traveling along a traveling direction defined by an inspection passage, wherein the object to be inspected includes a portion to be inspected and a portion to be avoided. The radiation inspection system includes: the radiation imaging device is arranged at a radiation inspection position of the inspection channel and used for emitting radiation beams to scan the inspected object and generate a radiation image; a plurality of detection devices respectively arranged at a plurality of preset positions downstream of the radiation inspection position, wherein the distances between the preset positions and the radiation inspection position along the travel direction defined by the inspection channel are different, and the detection devices are respectively used for detecting a plurality of moments when the front end of the part to be avoided of the inspected object reaches the corresponding preset positions and sending out a plurality of detection signals respectively comprising the moments; and a control device in communication connection with the radiation imaging device and the plurality of detection devices, respectively, wherein the control device is configured to: determining the types of the detected objects, wherein the lengths of the parts needing to be avoided of the detected objects of different types are different; receiving detection signals sent by detection devices corresponding to different types of detected objects in response to the different types of detected objects; and issuing an instruction for controlling the radiation imaging apparatus to emit the radiation beam at a predetermined time interval after the timing included in the detection signal. The radiation inspection system provided by the embodiment of the disclosure can safely avoid the vehicle head parts with various vehicle head lengths, and can ensure that the goods at the back are completely subjected to radiation scanning, namely, the safety of vehicle head avoidance and the completeness of goods scanning are simultaneously realized.
In the field of rapid inspection of vehicles based on radiation scanning, the current trend is to perform inspection without stopping the vehicle to be inspected, so that the safety inspection efficiency can be greatly improved. However, due to the hazard of the high-energy radiation rays to human bodies, when the vehicle to be inspected is inspected, the vehicle head part including the cab needs to be avoided so as to prevent the driver and passengers from being irradiated by the high-energy radiation rays.
FIG. 1A is a schematic view of a radiation inspection system for rapid inspection of vehicles. As shown in fig. 1A, the vehicle 1 includes a portion to be inspected 12 (e.g., a vehicle compartment loaded with cargo) and a portion to be avoided 11 (e.g., a head portion including a cab in which a driver and a passenger ride). A detection device 1000 for detecting the front end of the cab 11 of the vehicle 1 is provided in the inspection passage of the radiation inspection system. The detection device 1000 is disposed downstream of the primary beam emitted by the radiation inspection system.
During the passage of the vehicle 1 through the radiation inspection system shown in fig. 1A, the front end of the cab passes the main beam and triggers the detection device 1000. When the detection device 1000 is triggered, the radiation inspection system does not immediately emit a beam, but waits for a certain time interval Td and then controls the radiation inspection system to emit a beam. For the purpose of avoiding the cab, the above-mentioned time interval Td satisfies the following requirements:
Figure BDA0002880832660000121
where Lc is the length of the cab of the current subject vehicle, Ld is the distance from the main beam of the detection device 1000, and V is the traveling speed of the subject vehicle.
Meanwhile, the distance Ld between the detection device 1000 and the main beam is generally set to be the shortest length of the cab of the vehicle to be inspected by the radiation inspection system, so that the carriage part of the vehicle with a short vehicle head is prevented from being missed to be inspected, and the integrity of cargo scanning can be ensured.
In the actual security inspection process, the types of vehicles to be inspected by the radiation inspection system are more, and correspondingly, the length difference of cabs of various vehicles is also larger. In particular, for long-head vehicles (e.g. long nose trucks), the length Lc of the cab is particularly large. Thus, the time interval Td calculated by the above equation (1) is large. That is, when such a long-head vehicle passes through the radiation inspection system, the time for the avoidance waiting is longer than that for a normal vehicle. Due to system delay, speed measurement errors and the like, the longer the avoidance waiting time is, the higher the risk that the cab of the vehicle is subjected to wrong irradiation is. That is, the occupants of such vehicles are at a higher risk of being exposed to high doses of radiation.
FIG. 1B is a schematic diagram of a radiation inspection system for rapid inspection of vehicles. As shown in fig. 1B, the vehicle 1 includes a portion to be inspected 12 (e.g., a vehicle compartment loaded with cargo) and a portion to be avoided 11 (e.g., a head portion including a cab in which an occupant sits). Two detection devices, a first detection device 1001 and a second detection device 1002, are disposed within an inspection tunnel of a radiation inspection system. Both the first detection device 1001 and the second detection device 1002 are disposed downstream of the primary beam emitted by the radiation inspection system. The first and second detection means 1001, 1002 are located at substantially equal distances from the main beam, and the second detection means 1002 is located directly above the first detection means 1001.
In the embodiment shown in fig. 1B, when the foremost end of the long-head vehicle reaches the detection position, the foremost end of the long-head vehicle triggers only the first detection device 1001 located below due to the height, and the second detection device 1002 located above is still in the non-shielding state, i.e., in the non-triggered state. The second detecting device 1002 can be triggered only when the cab portion reaches the detection position after the long nose portion passes the first detecting device 1001 as the vehicle continues to travel forward. At this time, both the first detecting device 1001 and the second detecting device 1002 are in a triggered state. And after waiting for a certain time interval, controlling the radiation inspection system to emit beams.
In this embodiment, the second detecting device 1002 is added above the first detecting device 1001 by using the lower nose part of the longhead car than the height of the cab part, so as to reduce the waiting time for avoiding and reduce the risk of the driver and passengers being irradiated by high-dose radiation.
However, in this embodiment, the height of the second sensing device 1002 needs to be matched with an algorithm, both of which must be consistent to effectively calculate the latency. Moreover, this embodiment may not work for long-head vehicles with a higher chassis, due to the non-uniform cab height of the various types of long-head vehicles, i.e. for long-head vehicles with a higher chassis, there is still the above-mentioned risk of the driver and passengers being exposed to a high dose of radiation. In addition, in an actual subject vehicle, foreign objects such as a mirror and an antenna are provided on the head of some vehicles, and these foreign objects protrude from the head of the vehicle in the height direction. In this way, these foreign bodies can trigger the second detection device located above, i.e. when these vehicles pass through the radiation inspection system, the first detection device and the second detection device can be triggered at the same time, which results in the failure of the protective action of the second detection device. At this point, there is still a risk that the above-mentioned occupants are exposed to a high dose of radiation.
To address at least one of the above technical problems, embodiments of the present disclosure provide a radiation inspection system and a radiation inspection method.
Fig. 2 is a schematic block diagram of a radiation inspection system according to an embodiment of the present disclosure. FIG. 3 is a state diagram of use of a radiation inspection system according to an embodiment of the present disclosure. With combined reference to fig. 2 and 3, a radiation inspection system according to an embodiment of the present disclosure is used for performing radiation inspection on an object 1 to be inspected traveling along a traveling direction D1 defined by an inspection passage 9, wherein the object 1 to be inspected includes a portion 12 to be inspected and a portion 11 to be avoided.
In this document, the embodiments of the present disclosure are described by taking an example in which the object to be detected is a vehicle, particularly a cargo vehicle. Correspondingly, the part to be inspected is a carriage loaded with goods, and the part to be avoided is a cab for drivers and passengers to ride. Fig. 4A, 4B and 4C show schematic outlines of three different types of vehicles, respectively. For example, fig. 4A is a schematic profile view of a flat-head vehicle, fig. 4B is a schematic profile view of a short-head vehicle, and fig. 4C is a schematic profile view of a long-head vehicle. As shown in fig. 4A, the object 1 to be inspected does not have a separate engine room, and the cab is located at the front end of the portion to be inspected 12, constituting the portion to be avoided 11. As shown in fig. 4B and 4C, the portion to be avoided 11 is located at the front end of the portion to be inspected 12, and an engine compartment 13 is further provided in front of the cab. The cab and the engine compartment 13 together constitute the portion to be evacuated 11. The foremost end of the engine compartment 13 forms the front end of the portion to be avoided 11.
With combined reference to fig. 2 and 3, the radiation inspection system may include: a radiation imaging device 2 disposed at a radiation inspection position 10 of the inspection passage 9, for emitting a radiation beam to scan the inspected object 1 and generate a radiation image; a plurality of detecting devices 3, wherein the detecting devices 3 are respectively arranged at a plurality of preset positions P downstream of the radiation inspection position 10, the distances between the preset positions P and the radiation inspection position 10 along the travel direction D1 defined by the inspection passage are different, and the detecting devices 3 are respectively used for detecting a plurality of moments when the front end of the portion 11 to be avoided of the inspected object 1 reaches the corresponding preset positions and sending a plurality of detection signals respectively comprising the moments; and a control device 4, wherein the control device 4 is respectively connected with the radiation imaging device 2 and the plurality of detection devices 3 in a communication way.
In an embodiment of the present disclosure, the control device 4 may be configured to: determining the types of the detected objects 1, wherein the lengths of the parts 11 to be avoided of the different types of the detected objects 1 are different; receiving detection signals sent by detection devices 3 corresponding to different types of detected objects 1 in response to the detected objects; and issuing an instruction for controlling the radiation imaging apparatus 2 to emit the radiation beam at a predetermined time interval after the timing included in the detection signal.
Fig. 5 is a state diagram of the radiation inspection system shown in fig. 3 in a top view. With combined reference to fig. 2 to 5, the radiation imaging apparatus 2 may comprise, for example, a radiation source 21, a radiation source shield 22, a radiation beam collimator 23, an imaging radiation beam 24 and a radiation detector unit 25. The radiation beam generated by the radiation source 21 is shielded by the radiation source shield 22 and collimated by the collimator 23 to form an imaging radiation beam 24, and the radiation detector unit 25 receives the imaging radiation beam 24 transmitted through the object under examination to form a scanned image of the object under examination. The position in which the radiation source 21 emits the radiation beam can be regarded as a radiation inspection position of the radiation imaging apparatus 2, i.e. in this context, the position of the imaging radiation beam 24.
The radiation imaging apparatus 2 may be directly or indirectly in communication with the control apparatus 4 to receive control instructions from the control apparatus 4, such as to emit a radiation beam or to stop emitting a radiation beam.
It should be noted that, in this embodiment, a transmissive radiation imaging device is taken as an example for description, however, the embodiment of the present disclosure is not limited to this, and the radiation imaging device 2 may be another type of radiation imaging device such as a scattering radiation imaging device.
In the embodiments of the present disclosure, the expression "a plurality of detection means" may be understood as 2 or more detection means.
For example, in the embodiment shown in fig. 3 and 5, the plurality of detection devices includes at least 2 detection devices, and for convenience of description, the 2 detection devices are respectively referred to as a first detection device 31 and a second detection device 32. Accordingly, the plurality of preset positions P may include 2 preset positions, and for convenience of description, the 2 preset positions are referred to as a first preset position P1 and a second preset position P2, respectively.
The first detection device 31 is arranged at a first preset position P1 downstream of said radiation inspection position 10 in a direction of travel D1 defined by the inspection corridor. The second detection device 32 is arranged downstream of said first detection device 31 in a second preset position P2, along a travel direction D1 defined by the inspection corridor.
The types of the inspected object 1 at least comprise a first type and a second type, and the length of the portion 11 to be avoided of the inspected object 1 of the first type is smaller than that of the portion 11 to be avoided of the inspected object 1 of the second type. For example, referring to fig. 4A to 4C in combination, the first type of object 1 may be a flathead vehicle or a short-head vehicle, and the second type of object 1 may be a long-head vehicle. The first detection device 31 corresponds to the first type of object 1 to be inspected, and the second detection device 32 corresponds to the second type of object 1 to be inspected.
In an embodiment of the present disclosure, the control apparatus 4 may be configured to determine the type of the inspected object 1. For example, the determining the type of the detected object may include: when the length of the part 11 to be avoided of the detected object 1 is smaller than the length threshold, determining that the type of the detected object 1 is a first type; and when the length of the part 11 to be avoided of the detected object 1 is greater than or equal to the length threshold value, determining that the type of the detected object 1 is a second type.
In an embodiment of the present disclosure, the radiation inspection system may comprise a length determination unit for determining the length of the to-be-avoided portion 11 of the inspected object 1. The length determination unit may be integrated in the control device 4 or may be provided separately from the control device 4 while being in communication with the control device 4.
For example, in the embodiment of the present disclosure, the length determination unit may include an information recognition device, which may be disposed upstream of the radiation inspection position 10, for recognizing the identity information of the inspected object 1, so as to determine the length of the portion to be avoided 11 of the inspected object 1 according to the identity information. The information recognition device may be an identification recognition device capable of recognizing identification information on the test object 1, and may be a license plate recognition device, for example. In addition, the information recognition device may also be an RFID reading device or a two-dimensional code recognition device, and in this case, a corresponding RFID tag or a two-dimensional code needs to be set on the object 1 to be detected. Thus, the information identifying device can acquire the length information of the portion to be avoided 11 of the detected object 1 in advance.
For example, in the embodiment of the present disclosure, the length determination unit may include a plurality of sensors, and the length of the portion to be avoided 11 of the object 1 to be inspected is measured by using the plurality of sensors. In particular, the plurality of sensors may be disposed upstream of the radiation inspection location 10. When the object 1 is traveling into the inspection tunnel 9, one sensor may measure the traveling speed of the object 1; when the front end of the head section reaches a sensor, the sensor can record time t 0; the time t0 'is recorded when the vehicle cabin-to-cabin connection passes the sensor (i.e., the head portion just passes the sensor), at which time the head portion length can be calculated from the vehicle speed, in combination with t0 and t 0'.
In an embodiment of the present disclosure, the length threshold may be between the length of the head portion of the short-head vehicle and the length of the head portion of the long-head vehicle, that is, the length threshold may be greater than or equal to the lengths of the head portions of the short-head vehicle and the flat-head vehicle specified in the market or the national/industrial standard, and less than the length of the head portion of the long-head vehicle specified in the market or the national/industrial standard.
As such, the control device 4 may be configured to: and comparing the length of the detection evasion part of the current detected object 1 with the length threshold value to determine the type of the detected object 1.
In the embodiment of the present disclosure, when the object 1 to be inspected is a flathead vehicle or a short-head vehicle, at which the length of the detection avoidance portion of the object 1 to be inspected is relatively short, the process of avoiding the head may be controlled using the first detection device 31 near the radiation inspection position 10. When the object 1 to be inspected is a long-head vehicle, the length of the detection evasion part of the object 1 to be inspected is relatively long, and the avoidance of the head of the vehicle needs to be controlled by using the second detection device 32 far from the radiation inspection position 10.
In particular, the radiation inspection system may further comprise a speed measuring device 5 for detecting a travelling speed V of the object 1 to be inspected in the inspection tunnel 9. For example, the speed measuring device 5 may include various types of speed measuring devices such as a doppler velocity radar, a laser velocity measuring device, or a video velocity measuring device. For another example, the speed measuring device 5 may include a plurality of sensors, such as light curtains, and the plurality of sensors are used for measuring speed between zones. That is, the speed of the detected object is measured by dividing the distance between the first and second sensors by the time interval in which the vehicle passes the first and second sensors.
In the embodiment of the present disclosure, the first detecting device 31 is used for detecting a first time t when the front end of the to-be-avoided part 11 of the first type of object to be inspected 1 reaches the first preset position P11And sending out a message including said first time t1The first detection signal of (2). The second detecting device 32 is used for detecting a second time t when the front end of the to-be-avoided part 11 of the second type of detected object 1 reaches a second preset position P22And sending out a message including said second time t2The second detection signal of (2).
In an embodiment of the present disclosure, the control device 4 may be configured to: receiving a first detection signal sent by the first detection device 31 in response to a first type of detected object; and at the first time t1After a first predetermined time interval T1An instruction for controlling the radiation imaging apparatus 2 to emit a radiation beam is issued.
The control device 4 may be further configured to: receiving a second detection signal emitted by the second detection device 31 in response to the second type of detected object 1; and at said second time t2After a second predetermined time interval T2An instruction for controlling the radiation imaging apparatus 2 to emit a radiation beam is issued.
With combined reference to fig. 3 and 5, said first predetermined time interval T1Satisfies the following relation:
Figure BDA0002880832660000171
wherein Lc is the length of the part 11 of the detected object 1 to be avoided, LSE is the radiation protection safety distance of the radiation inspection system, and LS is the distance between the radiation inspection system and the part1The distance between the first detection means 31 and said radiation inspection position 9 in the direction of travel D1 defined for the inspection channel.
Said second predetermined time interval T2Satisfies the following relation:
Figure BDA0002880832660000181
wherein LS2The distance between the second detection means 32 and said radiation inspection position 9 in the direction of travel D1 defined by the inspection corridor.
Referring to fig. 2 to 5 in combination, when the object 1 is a flat car or a short car with a short car head, the front end of the car head triggers the first detection device 31 to detect a first time t included in the first detection signal1Delaying the first predetermined time interval T calculated by the above relation (2) as a starting point1Thereafter, at this time, the rear end of the head portion just moves away from the radiation inspection position 9, and the control device 4 controls the radiation imaging device 2 to emit a beam. Therefore, the head part of the flat head vehicle or the short head vehicle with the shorter head length is safely avoided, and the complete radiation scanning of the goods at the back can be ensured, namely, the safety of the head avoiding of the flat head vehicle or the short head vehicle with the shorter head length and the integrity of the goods scanning are realized at the same time.
When the object 1 is a long-head vehicle with a long head, the front end of the head triggers the second detecting device 32 to detect the second time t included in the second detection signal2Delaying the second predetermined time interval T calculated by the above relation (3) as a starting point2Thereafter, at this time, the rear end of the head portion just moves away from the radiation inspection position 9, and the control device 4 controls the radiation imaging device 2 to emit a beam. Like this, the locomotive portion to the long-head car that has longer locomotive has carried out safe dodge to can ensure to carry out complete radiation scanning to the goods at back, promptly, realized the security of the locomotive dodge of the long-head car that has longer locomotive and the integrality of goods scanning simultaneously.
In the embodiment of the present disclosure, when the radiation inspection is performed on the long-head vehicle, the first time t included in the first detection signal emitted by the first detection device 31 is not included1Is the starting point. As can be seen from the above relation (3), Lc is large for a long-head vehicle, and the distance LS between the second detection device 32 and the radiation inspection position 9 in the travel direction D1 defined by the inspection lane is large2Is also larger, so that the calculated second predetermined time interval T2Is smaller. That is, the second predetermined time interval T2And does not increase significantly with increasing vehicle head length. For example, in some embodiments, the first predetermined time interval T1May be substantially equal to the second predetermined time interval T2. That is, when the radiation scanning is performed on the long-head vehicle, the time for the avoidance waiting is also short, so that the risk that the driver and the passenger of the long-head vehicle are irradiated by the high-dose radiation can be reduced.
In some embodiments, the heights of the first and second sensing devices 31 and 32 from the reference plane are substantially the same. For example, the reference plane may be a surface of the object 1 to be inspected, such as the ground, which is in contact with the inspection passage 9. That is, the first detecting device 31 and the second detecting device 32 may be at the same height. For a long-head vehicle with a higher chassis or a long-head vehicle with foreign matters such as a reflector and an antenna arranged on the head, the protection effect of the second detection device 32 is still effective, so that the risk that drivers and passengers of the long-head vehicle are irradiated by high-dose radiation can be further reduced.
Fig. 6 is a state diagram of use of a radiation inspection system according to an embodiment of the present disclosure, wherein the plurality of detection devices may include more than 3 detection devices.
In an embodiment of the present disclosure, the plurality of detection devices may include 3 or more detection devices. That is, the radiation inspection system may include n detection devices, n being a natural number equal to or greater than 3, which are sequentially disposed at n preset positions downstream of the radiation inspection position 10 in an inspection-passage-defined traveling direction D1, and distances between the n preset positions and the radiation inspection position 10 in an inspection-passage-defined traveling direction D1 are sequentially increased, as shown in fig. 6.
The ith detection device is used for detecting the time t when the front end of the part 11 needing to be avoided of the detected object 1 reaches the ith preset positioniAnd sending out a message including said time tiWherein i is not less than 1 and not more than n and i is a natural number.
In the embodiment shown in fig. 6, for convenience of description, n preset positions are respectively denoted as P1, P2, …, Pi, …, Pn, and n detection devices are respectively denoted as 31, 32, …, 3i, …, 3 n.
In an embodiment of the present disclosure, the control device 4 may be configured to: when LC0 is not less than LC < LS1When the detected object 1 is determined to be a first type of detected object, where Lc is the length of the portion 11 to be avoided of the current detected object 1, Lc0 is the minimum length of the portion 11 to be avoided of the detected object to be detected by the radiation inspection system, and LS is1The distance between the first detection device 31 and the radiation inspection position 10 along the travel direction D1 defined by the inspection passage, the first detection device 31 being the one of the n detection devices that is closest to the radiation inspection position 10; receiving a first detection signal sent by the first detection device 31 in response to the first type of object to be detected, wherein the first detection signal includes a time t when the front end of the portion 11 to be avoided of the object 1 to be detected reaches the first preset position P11(ii) a And at said time t1After a first predetermined time interval T1An instruction for controlling the radiation imaging apparatus 2 to emit a radiation beam is issued.
The control device 4 is further configured to: when LSj-1≤Lc＜LSjThen, the detected object is determined to be the j-th type of detected object, wherein LSjIs the distance, LS, between the jth detection device and the radiation inspection location 10 in the direction of travel D1 defined by the inspection corridorj-1The distance between the j-1 detection device and the radiation inspection position 10 along the travel direction D1 defined by the inspection channel, wherein j is more than or equal to 2 and less than or equal to n, and j is a natural number; responding to the jth type of detected object, receiving a jth detection signal sent by the jth detection device, wherein the jth detection signal comprises a time t when the front end of the part 11 to be avoided of the detected object reaches the jth preset positionj(ii) a And at said time tjAfter a predetermined time interval TjAn instruction for controlling the radiation imaging apparatus 2 to emit a radiation beam is issued.
In an embodiment of the present disclosure, the secondA predetermined time interval T1Satisfies the following relation:
Figure BDA0002880832660000201
wherein V is the traveling speed of the detected object in the inspection channel.
In an embodiment of the present disclosure, the predetermined time interval TjSatisfies the following relation:
Figure BDA0002880832660000202
for example, in some embodiments of the present disclosure, LS1LC0+ LSE, where LSE is the radiation protection safety distance of the radiation inspection system.
I.e. the first predetermined time interval T1Satisfies the following relation:
Figure BDA0002880832660000203
for example, in some embodiments of the present disclosure, a distance between any two adjacent ones of the n detection devices along the inspection lane defined direction of travel D1 is substantially equal to LSE. Namely LSj＝LSj-1+LSE。
I.e. the predetermined time interval TjSatisfies the following relation:
Figure BDA0002880832660000211
the radiation inspection system will be further described below by taking 3 detection devices as an example. For example, 3 detection devices correspond to a flathead vehicle, a short-head vehicle, and a long-head vehicle, respectively, but embodiments of the present disclosure are not limited thereto.
For a flat head vehicle, the length of the head of the flat head vehicle is shorter, so that the flat head vehicle can be usedThe vehicle head avoidance is carried out with the first detection device 31 closest to the radiation examination position 10. Specifically, the front end of the head section triggers the first detection device 31 to delay the first predetermined time interval T calculated by the above relational expression (4) with the first time T1 included in the first detection signal as a starting point1Thereafter, at this time, the rear end of the head portion just moves away from the radiation inspection position 9, and the control device 4 controls the radiation imaging device 2 to emit a beam. For example, for a flathead vehicle whose head portion length is equal to LC0, i.e., the flathead vehicle has a minimum head length, the first predetermined time interval T calculated by the above relation (4)1Equal to 0, i.e. for such a flathead vehicle, when the front end of its head portion triggers the first detection means 31, the rear end of the head portion just moves away from the radiation inspection position 10, at which time the beam can be scanned.
For short-head vehicles, the length of the head of the short-head vehicle is between that of a flat-head vehicle and that of a long-head vehicle, and the second detection device 32 can be used for head avoidance. In particular, the front end of the head portion triggers the second detection means 32 to detect a second time t comprised by the second detection signal2Delaying the second predetermined time interval T calculated by the above relation (5) as a starting point2Thereafter, at this time, the rear end of the head portion just moves away from the radiation inspection position 9, and the control device 4 controls the radiation imaging device 2 to emit a beam. Therefore, the avoidance waiting time can be effectively reduced, and the risk that drivers and passengers of the long-head vehicle are irradiated by high-dose radiation can be reduced.
For a long-head vehicle, the vehicle head length is long, and the third detection device 33 can be used for avoiding the vehicle head. In particular, the front end of the head portion triggers the third detection means 33 to detect a third time t comprised by the third detection signal3Delaying the third predetermined time interval T calculated by the above relation (5) as a starting point3Thereafter, at this time, the rear end of the head portion just moves away from the radiation inspection position 9, and the control device 4 controls the radiation imaging device 2 to emit a beam. Therefore, the avoidance waiting time can be effectively reduced, and the risk that drivers and passengers of the long-head vehicle are irradiated by high-dose radiation can be reduced.
Therefore, the radiation inspection system provided by the embodiment of the disclosure can safely avoid the vehicle head parts with various vehicle head lengths, and can ensure complete radiation scanning of the goods behind, namely, the safety of vehicle head avoidance and the integrity of goods scanning are simultaneously realized.
In the embodiment of the present disclosure, the number of the detection devices may be set according to the vehicle head length range of the vehicle to be inspected by the radiation inspection system, and is not limited to 3, for example, 4, 5, or even more detection devices may be set according to needs to refine the vehicle head safety avoidance, effectively reduce the avoidance waiting time, and thereby reduce the risk that the driver and the passenger of the long-head vehicle are irradiated by high-dose radiation. Meanwhile, complete radiation scanning of the following goods can be ensured.
Also, in the embodiments of the present disclosure, the heights of the plurality of detection devices from the reference plane are substantially the same, i.e., may be at the same height.
In an embodiment of the present disclosure, a height of the plurality of detection devices from the reference plane is less than a minimum height of a top surface of a portion to be avoided of each type of object to be detected, which needs to be detected by the radiation inspection system, from the reference plane. For example, for a long-head vehicle and a short-head vehicle, the avoidance part comprises a cab and an engine compartment, and the top surface of the cab is higher than that of the engine compartment. In an embodiment of the present disclosure, the height of each detection device from the reference plane is smaller than the height of the top surface of the engine compartment (i.e., the engine compartment cover) from the reference plane. In this way, the front end of the nacelle can trigger the respective detection device.
In an embodiment of the present disclosure, the plurality of detection devices include at least one selected from a photoelectric switch, a light curtain, and a ground induction coil.
Embodiments of the present disclosure also provide a radiation inspection method, and fig. 7 is a flowchart of the radiation inspection method. The radiation inspection method is used for performing radiation inspection on an object 1 to be inspected traveling along a traveling direction D1 defined by an inspection passage 9, wherein the object 1 to be inspected comprises a part 12 to be inspected and a part 11 to be avoided, and a radiation imaging device 2 is arranged at a radiation inspection position 10 of the inspection passage 9. Referring to fig. 7, the radiation inspection method may include the following steps.
In step S71, the detecting devices are respectively configured to detect a plurality of times when the front end of the portion of the inspected object to be avoided reaches a corresponding preset position, and to emit a plurality of detection signals respectively including the plurality of times, wherein the detecting devices are respectively disposed at a plurality of preset positions downstream of the radiation inspection position, and distances between the preset positions and the radiation inspection position along a travel direction defined by an inspection channel are different.
In step S72, the type of the object to be inspected is determined, wherein the length of the portion to be avoided is different for different types of the object to be inspected.
In step S73, in response to a different type of object to be inspected, a detection signal emitted by a detection device corresponding to the type of object to be inspected is received.
In step S74, an instruction for controlling the radiation imaging apparatus to emit the radiation beam is issued after a predetermined time interval elapses after the timing included in the detection signal.
In step S75, in response to the instruction, the radiation imaging apparatus is controlled to emit a radiation beam, scan the object to be inspected, and generate a radiation image.
With combined reference to fig. 3, the radiation inspection method may include the steps of: receiving a first detection signal emitted by the first detection device in response to a first type of detected object; and a first predetermined time interval T after said first moment1And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
The radiation inspection method may further include the steps of: receiving a second detection signal emitted by the second detection device in response to a second type of detected object; and a second predetermined time interval T has elapsed after said second moment in time2And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
In some embodiments, the step of determining the type of the detected object may include: when the length of the part, needing to be avoided, of the detected object is smaller than a length threshold value, determining that the type of the detected object is a first type; and when the length of the part needing to be avoided of the detected object is larger than or equal to the length threshold value, determining that the type of the detected object is a second type.
In some embodiments, the radiation inspection method may further include: the traveling speed V of the object 1 to be inspected in the inspection passage 9 is detected.
With combined reference to fig. 3 and 5, said first predetermined time interval T1Satisfies the following relation:
Figure BDA0002880832660000241
wherein Lc is the length of the part 11 of the detected object 1 to be avoided, LSE is the radiation protection safety distance of the radiation inspection system, and LS is the distance between the radiation inspection system and the part1The distance between the first detection means 31 and said radiation inspection position 9 in the direction of travel D1 defined by the inspection corridor.
Said second predetermined time interval T2Satisfies the following relation:
Figure BDA0002880832660000242
wherein LS2The distance between the second detection means 32 and said radiation inspection position 9 in the direction of travel D1 defined by the inspection corridor.
With combined reference to fig. 5, the radiation inspection method may include the steps of: when LC0 is not less than LC < LS1When the detected object is determined to be the first type of detected object, wherein Lc is the length of the part needing to be avoided of the current detected object, LC0 is the minimum length of the part needing to be avoided of the detected object needing to be detected by the radiation inspection system, LS1For the distance between the first detection device and the radiation inspection position along the travel direction defined by the inspection passageFor one of the n detection means, LS, closest to the radiation examination position1Greater than LC 0; responding to a first type of detected object, receiving a first detection signal sent by the first detection device, wherein the first detection signal comprises the time t when the front end of the part needing to be avoided of the detected object reaches the first preset position1(ii) a And at said time t1After a first predetermined time interval T1And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
With continuing reference to fig. 5, the radiation inspection method may further include the steps of: when LSj-1≤Lc＜LSjThen, the detected object is determined to be the j-th type of detected object, wherein LSjFor the distance between the jth detection device and the radiation inspection position in the travel direction defined by the inspection channel, LSj-1A distance between the j-1 th detection device and the radiation inspection position along the travel direction defined by the inspection channel, wherein j is more than or equal to 2 and less than or equal to n, j is a natural number, LSjGreater than LSj-1(ii) a Responding to the jth type of detected object, and receiving a jth detection signal sent by the jth detection device, wherein the jth detection signal comprises the time t when the front end of the part needing to be avoided of the detected object reaches the jth preset positionj(ii) a And at said time tjAfter a predetermined time interval TjAnd issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
In an embodiment of the present disclosure, the first predetermined time interval T1Satisfies the following relation:
Figure BDA0002880832660000251
wherein V is the traveling speed of the detected object in the inspection channel.
In an embodiment of the present disclosure, the predetermined time interval TjSatisfies the following relation:
Figure BDA0002880832660000252
for example, in some embodiments of the present disclosure, LS1LC0+ LSE, where LSE is the radiation protection safety distance of the radiation inspection system.
I.e. the first predetermined time interval T1Satisfies the following relation:
Figure BDA0002880832660000253
for example, in some embodiments of the present disclosure, a distance between any two adjacent ones of the n detection devices along the inspection lane defined direction of travel D1 is substantially equal to LSE. Namely LSj＝LSj-1+LSE。
I.e. the predetermined time interval TjSatisfies the following relation:
Figure BDA0002880832660000254
similarly, the radiation inspection method provided by the embodiment of the disclosure can safely avoid the vehicle head parts with various vehicle head lengths, and can ensure that the goods behind are completely radiated and scanned, that is, the safety of vehicle head avoidance and the completeness of goods scanning are simultaneously realized.
The method according to embodiments of the present disclosure may also be implemented as a computer program comprising computer program code instructions for performing the above-described steps defined in the above-described method of embodiments of the present disclosure. Alternatively, the method according to the embodiment of the present disclosure may also be implemented as a computer program product including a computer readable medium having stored thereon a computer program for executing the above-described functions defined in the above-described method of the embodiment of the present disclosure. Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or combinations of both.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems and methods according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The radiation inspection system and the radiation inspection method according to the embodiment of the disclosure have at least one of the following technical effects:
(1) the height information of the head part does not need to be acquired or calculated, and the requirement on a control algorithm is favorably reduced.
(2) The system is effective for vehicles with various vehicle head lengths, and the application range of the radiation inspection system and the radiation inspection method is enlarged.
(3) A plurality of detection devices do not need to be installed along the height direction, and installation complexity is reduced.
(4) For vehicles with longer head length, such as a long-head vehicle, the avoidance waiting time is effectively shortened, the situation that the radiation inspection system and the radiation inspection method need to wait for longer time to control the beam-outgoing time is avoided, and the safety is improved.
Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims (36)

1. A radiation inspection system for radiation inspection of an object under inspection traveling in a direction of travel defined by an inspection corridor, wherein the object under inspection includes a portion to be inspected and a portion to be avoided, the radiation inspection system comprising:
a radiation imaging device arranged at a radiation inspection position of the inspection channel and used for emitting radiation beams to scan the inspected object and generate a radiation image;
a plurality of detection devices respectively arranged at a plurality of preset positions downstream of the radiation inspection position, wherein the distances between the preset positions and the radiation inspection position along the travel direction defined by the inspection channel are different, and the detection devices are respectively used for detecting a plurality of moments when the front end of the part to be avoided of the inspected object reaches the corresponding preset positions and sending out a plurality of detection signals respectively comprising the moments; and
a control device in communication with the radiation imaging device and the plurality of detection devices, respectively,
wherein the control device is configured to:
determining the types of the detected objects, wherein the lengths of the parts needing to be avoided of the detected objects of different types are different;
receiving detection signals sent by detection devices corresponding to different types of detected objects in response to the different types of detected objects; and
issuing an instruction for controlling the radiation imaging apparatus to emit the radiation beam at a predetermined time interval after a time instant included in the detection signal.
2. A radiation inspection system according to claim 1, wherein said plurality of detection means comprises at least a first detection means disposed at a first preset position downstream of said radiation inspection position in the direction of travel defined by the inspection channel and a second detection means disposed at a second preset position downstream of said first detection means in the direction of travel defined by the inspection channel;
the types of the detected objects at least comprise a first type and a second type, and the length of the part needing to be avoided of the detected objects of the first type is smaller than that of the part needing to be avoided of the detected objects of the second type; and
the first detection device corresponds to the first type of detected object, and the second detection device corresponds to the second type of detected object.
3. A radiation inspection system according to claim 2, wherein said first detecting device is configured to detect a first time when the front end of the to-be-avoided part of the inspected object of the first type reaches the first preset position, and to emit a first detecting signal including the first time;
the control device is configured to:
receiving a first detection signal emitted by the first detection device in response to a first type of detected object; and
a first predetermined time interval T has elapsed after said first moment1And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
4. A radiation inspection system according to claim 3, wherein said second detecting device is configured to detect a second time when the front end of the to-be-avoided part of the second type of inspected object reaches the second preset position, and to emit a second detection signal including the second time;
the control device is configured to:
receiving a second detection signal emitted by the second detection device in response to a second type of detected object; and
after the second time passesTwo predetermined time intervals T2And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
5. A radiation inspection system as claimed in any of claims 2 to 4, wherein said determining the type of object being inspected comprises:
when the length of the part needing to be avoided of the detected object is smaller than a length threshold value, determining that the type of the detected object is a first type; and
and when the length of the part needing to be avoided of the detected object is larger than or equal to the length threshold value, determining that the type of the detected object is a second type.
6. A radiation inspection system according to claim 4, further comprising speed measuring means for detecting the speed V of travel of the inspected object in the inspection tunnel.
7. A radiation inspection system according to claim 6, wherein said first predetermined time interval T1Satisfies the following relation:
Figure FDA0002880832650000031
wherein Lc is the length of the part of the current detected object needing to be avoided, LSE is the radiation protection safety distance of the radiation inspection system, and LS is the distance between the radiation inspection system and the part needing to be avoided1A distance between the first detection device and the radiation inspection position along a travel direction defined for the inspection channel.
8. A radiation inspection system according to claim 7, wherein said second predetermined time interval T2Satisfies the following relation:
Figure FDA0002880832650000032
wherein LS2A distance between the second detection device and the radiation inspection position along a travel direction defined for the inspection channel.
9. A radiation inspection system according to claim 8, wherein said first predetermined time interval T1And said second predetermined time interval T2Are substantially equal.
10. The radiation inspection system of claim 1, wherein the plurality of detection devices includes n detection devices, n being a natural number greater than or equal to 3, the n detection devices being sequentially disposed at n preset positions downstream of the radiation inspection position in a direction of travel defined by an inspection lane, distances between the n preset positions and the radiation inspection position in the direction of travel defined by the inspection lane increasing sequentially,
wherein, the ith detection device is used for detecting the time t when the front end of the part needing to be avoided of the detected object reaches the ith preset positioniAnd sending out a message including said time tiWherein i is not less than 1 and not more than n and i is a natural number.
11. A radiation inspection system according to claim 10, wherein the control means is configured to:
when LC0 is not less than LC < LS1When the detected object is determined to be the first type of detected object, wherein Lc is the length of the part needing to be avoided of the current detected object, LC0 is the minimum length of the part needing to be avoided of the detected object needing to be detected by the radiation inspection system, LS1For the distance between a first detection device, which is the one of the n detection devices closest to the radiation inspection position, and the radiation inspection position in the travel direction defined by the inspection channel, LS1Greater than LC 0;
receiving a first detection signal from the first detection device in response to a first type of detected object, the first detection signal being generated by the first detection deviceThe detection signal comprises the moment t when the front end of the part needing to be avoided of the detected object reaches the first preset position1(ii) a And
at said time t1After a first predetermined time interval T1And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
12. The radiation inspection system of claim 11, wherein the control device is configured to:
when LS isj-1≤Lc＜LSjThen, the detected object is determined to be the j-th type of detected object, wherein LSjFor the distance between the jth detection device and the radiation inspection position in the travel direction defined by the inspection channel, LSj-1A distance between the j-1 th detection device and the radiation inspection position along the travel direction defined by the inspection channel, wherein j is more than or equal to 2 and less than or equal to n, j is a natural number, LSjGreater than LSj-1；
Responding to the jth type of detected object, receiving a jth detection signal sent by the jth detection device, wherein the jth detection signal comprises a moment t when the front end of a part needing to be avoided of the detected object reaches the jth preset positionj(ii) a And
at said time tjAfter a predetermined time interval TjAnd issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
13. A radiation inspection system according to claim 11 or 12, wherein said first predetermined time interval T1Satisfies the following relation:
Figure FDA0002880832650000051
wherein V is the traveling speed of the detected object in the inspection channel.
14. The method of claim 12Radiation inspection system characterized in that said predetermined time interval TjSatisfies the following relation:
Figure FDA0002880832650000052
wherein V is the traveling speed of the detected object in the inspection channel.
15. A radiation inspection system according to claim 11 or 12, characterized by LS1LC0+ LSE, where LSE is the radiation protection safety distance of the radiation inspection system.
16. A radiation inspection system according to claim 15, wherein a distance between any two adjacent ones of said n detection arrangements along a direction of travel defined by the inspection lane is substantially equal to LSE.
17. A radiation inspection system according to claim 1 or claim 10, wherein the plurality of detection means are substantially equal in height from a reference plane, the reference plane being the plane in which the inspected object is in contact with the inspection channel.
18. A radiation inspection system according to claim 17, wherein the height of said plurality of detection devices from said reference plane is less than the height of the top surface of the to-be-avoided portion of each type of inspected object to be detected by said radiation inspection system from said reference plane.
19. A radiation inspection system according to claim 1 or 10, wherein said plurality of detection means comprises at least one selected from a photoelectric switch, a light curtain and a ground coil.
20. A radiation inspection system according to claim 1 or 10, wherein said object to be inspected is a vehicle, and said portion to be avoided is a head portion including at least a cab of the vehicle.
21. A radiation inspection system according to claim 21, wherein the first type of inspected object is a flathead vehicle or a short-head vehicle and the second type of inspected object is a long-head vehicle.
22. A radiation inspection method for performing radiation inspection of an object to be inspected traveling along a traveling direction defined by an inspection passage, wherein the object to be inspected includes a portion to be inspected and a portion to be avoided, and a radiation imaging device is provided at a radiation inspection position of the inspection passage, the radiation inspection method comprising:
the detection devices are respectively used for detecting a plurality of moments when the front end of the part needing to be avoided of the detected object reaches a corresponding preset position and sending out a plurality of detection signals respectively comprising the moments, wherein the detection devices are respectively arranged at a plurality of preset positions at the downstream of the radiation inspection position, and the distances between the preset positions and the radiation inspection position along the travel direction defined by the inspection channel are different;
determining the types of the detected objects, wherein the lengths of the parts needing to be avoided of the different types of the detected objects are different;
receiving detection signals sent by detection devices corresponding to different types of detected objects in response to the different types of detected objects; and
issuing an instruction for controlling the radiation imaging apparatus to emit a radiation beam at a predetermined time interval after a time included in the detection signal;
and controlling the radiation imaging device to emit radiation beams in response to the instructions, scanning the detected object and generating a radiation image.
23. A radiation inspection method according to claim 22, wherein said plurality of detection means comprises at least a first detection means disposed at a first preset position downstream of said radiation inspection position in the direction of travel defined by the inspection channel and a second detection means disposed at a second preset position downstream of said first detection means in the direction of travel defined by the inspection channel;
the types of the detected objects at least comprise a first type and a second type, and the length of the part needing to be avoided of the detected objects of the first type is smaller than that of the part needing to be avoided of the detected objects of the second type; and
the first detection device corresponds to the first type of detected object, and the second detection device corresponds to the second type of detected object.
24. A radiation inspection method according to claim 23, wherein said first detecting device is adapted to detect a first time when the front end of the to-be-avoided portion of the first type of inspected object reaches the first preset position, and to emit a first detection signal including the first time;
the radiation inspection method includes:
receiving a first detection signal emitted by the first detection device in response to a first type of detected object; and
a first predetermined time interval T has elapsed after said first moment1And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
25. A radiation inspection method according to claim 24, wherein said second detecting device is adapted to detect a second time when the front end of the to-be-avoided portion of the second type of inspected object reaches the second preset position, and to emit a second detection signal including the second time;
the radiation inspection method includes:
receiving a second detection signal emitted by the second detection device in response to a second type of detected object; and
a second predetermined time interval T has elapsed after said second moment2And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
26. The radiation inspection method of any one of claims 23 to 25, wherein said determining a type of inspected object comprises:
when the length of the part needing to be avoided of the detected object is smaller than a length threshold value, determining that the type of the detected object is a first type; and
and when the length of the part needing to be avoided of the detected object is larger than or equal to the length threshold value, determining that the type of the detected object is a second type.
27. The radiation inspection method of claim 25, further comprising: and detecting the traveling speed V of the detected object in the inspection channel.
28. A radiation inspection method according to claim 27, wherein said first predetermined time interval T1Satisfies the following relation:
Figure FDA0002880832650000081
wherein Lc is the length of the part of the current detected object needing to be avoided, LSE is the radiation protection safety distance of the radiation inspection system, and LS is the distance between the radiation inspection system and the part needing to be avoided1A distance between the first detection device and the radiation inspection position along a travel direction defined by the inspection channel.
29. A radiation inspection method according to claim 28, wherein said second predetermined time interval T2Satisfies the following relation:
Figure FDA0002880832650000082
wherein，LS2A distance between the second detection device and the radiation inspection position along a travel direction defined by the inspection channel.
30. The radiation inspection method of claim 22, wherein the plurality of detection devices includes n detection devices, n being a natural number equal to or greater than 3, the n detection devices being sequentially disposed at n preset positions downstream of the radiation inspection position in a direction of travel defined by an inspection lane, distances between the n preset positions and the radiation inspection position in the direction of travel defined by the inspection lane increasing sequentially,
wherein, the ith detection device is used for detecting the time t when the front end of the part needing to be avoided of the detected object reaches the ith preset positioniAnd sending out a message including said time tiWherein i is not less than 1 and not more than n and i is a natural number.
31. A radiation inspection method according to claim 30, comprising:
when LC0 is not less than LC < LS1When the detected object is determined to be the first type of detected object, wherein Lc is the length of the part needing to be avoided of the current detected object, LC0 is the minimum length of the part needing to be avoided of the detected object needing to be detected by the radiation inspection system, LS1For the distance between a first detection means and said radiation inspection position in the travel direction defined by the inspection corridor, said first detection means being the one of the n detection means which is closest to said radiation inspection position, LS1Greater than LC 0;
responding to a first type of detected object, receiving a first detection signal sent by the first detection device, wherein the first detection signal comprises the time t when the front end of the part needing to be avoided of the detected object reaches the first preset position1(ii) a And
at said time t1After a first predetermined time interval T1And issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
32. A radiation inspection method according to claim 31, comprising:
when LSj-1≤Lc＜LSjThen, the detected object is determined to be the j-th type of detected object, wherein LSjFor the distance between the jth detection device and the radiation inspection position in the travel direction defined by the inspection channel, LSj-1Is the distance between the j-1 th detection device and the radiation inspection position along the travel direction defined by the inspection channel, wherein j is more than or equal to 2 and less than or equal to n, j is a natural number, LSjGreater than LSj-1；
Responding to the jth type of detected object, and receiving a jth detection signal sent by the jth detection device, wherein the jth detection signal comprises the time t when the front end of the part needing to be avoided of the detected object reaches the jth preset positionj(ii) a And
at said time tjAfter a predetermined time interval TjAnd issuing instructions for controlling the radiation imaging apparatus to emit a radiation beam.
33. A radiation inspection method according to claim 31 or 32, wherein said first predetermined time interval T1Satisfies the following relation:
Figure FDA0002880832650000101
wherein V is the traveling speed of the detected object in the inspection channel.
34. A radiation inspection method according to claim 32, wherein said predetermined time interval TjSatisfies the following relation:
Figure FDA0002880832650000102
wherein V is the traveling speed of the detected object in the inspection channel.
35. A radiation inspection method according to claim 31 or 32, wherein LS1LC0+ LSE, where LSE is the radiation protection safety distance of the radiation inspection system.
36. A radiation inspection method according to claim 35, wherein the distance between any two adjacent ones of said n detection arrangements along the direction of travel defined by the inspection corridor is substantially equal to LSE.
CN202011642948.9A 2020-12-31 2020-12-31 Radiation inspection system and radiation inspection method Pending CN114764074A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103149599A (en) * 2013-03-07 2013-06-12 吉林省高速公路管理局 System and method for cab avoidance of vehicles of highway green detection channel
CN104090308A (en) * 2014-07-22 2014-10-08 北京君和信达科技有限公司 System and method for conducting radiation scanning on moving target and data information tag
CN105022095A (en) * 2014-04-24 2015-11-04 北京君和信达科技有限公司 Quick-pass-type moving target radiation inspection method and system
CN109917479A (en) * 2019-04-09 2019-06-21 同方威视技术股份有限公司 Vehicle inspection method, apparatus, system and computer readable storage medium
WO2020139162A1 (en) * 2018-12-27 2020-07-02 Obshhestvo S Ogranichennoj Otvetstvennost`Yu "Isb.A" (Ooo "Isb.A") System for screening vehicles and method of radioscopic control of moving objects

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103149599A (en) * 2013-03-07 2013-06-12 吉林省高速公路管理局 System and method for cab avoidance of vehicles of highway green detection channel
CN105022095A (en) * 2014-04-24 2015-11-04 北京君和信达科技有限公司 Quick-pass-type moving target radiation inspection method and system
CN104090308A (en) * 2014-07-22 2014-10-08 北京君和信达科技有限公司 System and method for conducting radiation scanning on moving target and data information tag
WO2020139162A1 (en) * 2018-12-27 2020-07-02 Obshhestvo S Ogranichennoj Otvetstvennost`Yu "Isb.A" (Ooo "Isb.A") System for screening vehicles and method of radioscopic control of moving objects
CN109917479A (en) * 2019-04-09 2019-06-21 同方威视技术股份有限公司 Vehicle inspection method, apparatus, system and computer readable storage medium

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