CN114527516A - Multi-channel radiographic inspection apparatus - Google Patents
Multi-channel radiographic inspection apparatus Download PDFInfo
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- CN114527516A CN114527516A CN202011306389.4A CN202011306389A CN114527516A CN 114527516 A CN114527516 A CN 114527516A CN 202011306389 A CN202011306389 A CN 202011306389A CN 114527516 A CN114527516 A CN 114527516A
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- 238000007689 inspection Methods 0.000 title claims abstract description 226
- 230000005855 radiation Effects 0.000 claims abstract description 115
- 238000003491 array Methods 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 abstract description 3
- 230000032258 transport Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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- 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
- G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
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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
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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
- G01N23/06—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 measuring the absorption
- G01N23/10—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 measuring the absorption the material being confined in a container, e.g. in a luggage X-ray scanners
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Abstract
A radiographic inspection apparatus comprising: a fixed frame, a plurality of inspection channels, a scanning device, and a controller. The fixed frame has a substantially circular ring shape. A plurality of inspection channels are arranged in a circumferential direction inside the fixed frame, each inspection channel being adapted to carry an object to be inspected. The scanning device includes: a radiation source 2 mounted in the center of the fixed frame, the radiation source generating a radiation beam capable of irradiating each inspection passage; and receiving means mounted on the fixed frame in a manner extending in the circumferential direction and adapted to receive the radiation beam passing through each of the inspection channels. The controller is suitable for controlling the scanning device to sequentially scan and inspect the target in each inspection channel. A plurality of inspection channels can share one scanning device, and each inspection channel can carry out independent scanning inspection on the inspected object.
Description
Technical Field
Embodiments of the present disclosure relate to a radiographic inspection apparatus, and more particularly, to a multi-channel radiographic inspection apparatus in which an object to be inspected can be placed at a plurality of positions.
Background
On the basis of public safety requirements, carrying security inspection systems are often used to carry out non-invasive inspection on objects such as luggage cases or packages in large public places such as large exhibitions, temporary highway checkpoints, side inspection ports, stadiums and the like, and the objects are inspected for the presence of contraband such as drugs, explosives and the like by using, for example, ray inspection equipment installed on vehicles. The radiographic inspection apparatus essentially comprises an inspection tunnel and a scanning device. The object to be examined is usually passed through an examination channel of a radiographic examination apparatus by means of a transport structure, the scanning device essentially comprising a radiation source mounted on one side of the examination channel and adapted to emit a beam of X-radiation, and a detector array mounted on the other side of the examination channel and adapted to receive said beam of radiation.
In the existing ray inspection equipment, the object to be inspected can only be subjected to scanning inspection in a single inspection channel, and the scanning device can only perform scanning inspection on the object to be inspected in the single inspection channel, so that the inspection efficiency is low. A radiation inspection apparatus having two channels has been developed, and an object to be inspected in each of the inspection channels can be subjected to scanning inspection, but a separate scanning device needs to be arranged for each of the inspection channels, thereby increasing the cost of the radiation inspection apparatus.
Disclosure of Invention
An object of the present disclosure is to solve at least one aspect of the above problems and disadvantages in the related art.
According to an embodiment of an aspect of the present disclosure, there is provided a radiographic inspection apparatus including: a fixed frame, a plurality of inspection channels, a scanning device, and a controller. The fixed frame has a substantially circular ring shape. A plurality of inspection channels are arranged in a circumferential direction inside the fixed frame, each inspection channel being adapted to carry an object to be inspected. The scanning device includes: a radiation source 2 mounted in the center of the fixed frame, the radiation source generating a radiation beam capable of irradiating each inspection passage; and receiving means mounted on the fixed frame in a manner extending in the circumferential direction and adapted to receive the radiation beam passing through each of the inspection channels. The controller is suitable for controlling the scanning device to sequentially scan and inspect the target in each inspection channel.
According to an embodiment of the disclosure, the radiation source is arranged to be rotatable around a rotation axis.
According to an embodiment of the disclosure, the receiving device is arranged to move on the fixed frame in a circumferential direction with respect to a centre of the fixed frame.
According to an embodiment of the disclosure, the radiographic inspection apparatus further comprises a synchronization module adapted to control an angular velocity of the movement of the receiving device on the fixed frame in a circumferential direction with respect to a center of the fixed frame to be the same as an angular velocity of the circular rotation of the radiation source on the fixed frame, such that the scanning device can be moved in sequence to the vicinity of each of the inspection channels.
According to an embodiment of the disclosure, the receiving device comprises a plurality of sub-receiving devices arranged in the circumferential direction, the plurality of sub-receiving devices being arranged to receive the radiation beams traversing a plurality of inspection channels, respectively.
According to an embodiment of the disclosure, the radiation source is adapted to generate a radiation beam radiating in a circumferential direction of 360 degrees.
According to an embodiment of the disclosure, the receiving device is arranged to move on the fixed frame in a circumferential direction with respect to a center of the fixed frame to sequentially receive the radiation beams passing through the plurality of inspection channels.
According to an embodiment of the disclosure, the receiving device comprises a plurality of sub-receiving devices arranged in the circumferential direction, the plurality of sub-receiving devices being arranged to receive the radiation beams traversing a plurality of inspection channels, respectively.
According to an embodiment of the present disclosure, each of the inspection channels includes: the controller controls the scanning device to scan and check the target only when the first sensor detects that the target exists in the inspection channel.
According to an embodiment of the present disclosure, each of the inspection channels further comprises: at least one gate disposed on at least one of an entrance and an exit of the inspection tunnel and configured to close the entrance and the exit during a scanning inspection after an object under inspection is placed in the inspection tunnel and/or when the scanning device inspects the object for suspicious items.
According to an embodiment of the present disclosure, each of the inspection channels includes: and the controller controls the scanning device to scan and inspect the target in the inspection channel only when the second sensor detects that the at least one gate is closed.
According to an embodiment of the disclosure, the scanning device further comprises a shielding device adapted to prevent a radiation beam emitted from the radiation source from being emitted to the examination channel when the first sensor of the examination channel detects that no target is present in the examination channel or when the second sensor of the examination channel detects that the shutter is open.
According to an embodiment of the present disclosure, the controller turns off the radiation source of the scanning device that moves to the vicinity of the inspection passage when the first sensor of the inspection passage detects that there is no target in the inspection passage or when the second sensor of the inspection passage detects that the shutter is opened.
According to an embodiment of the present disclosure, the controller controls the scanning device to pass through the inspection passage at a faster speed when the first sensor of the inspection passage detects that there is no target in the inspection passage or when the second sensor of the inspection passage detects that the shutter is opened.
According to an embodiment of the present disclosure, the radiation sources are adapted to emit a plurality of angled radiation beams towards the same inspection channel; and the receiving device comprises a plurality of sets of detector arrays, receiving surfaces of the plurality of sets of detector arrays being arranged at an angle to each other to receive a plurality of angled radiation beams, respectively.
According to an embodiment of the present disclosure, each of the inspection lanes further comprises a transport device disposed at a lower portion of the inspection lane and adapted to transport the object in a horizontal direction perpendicular to the circumferential direction.
According to an embodiment of the present disclosure, the radiographic inspection apparatus further comprises an annular rotating frame (6) rotatably mounted on the fixed frame, and the receiving device is mounted on the rotating frame so as to rotate with the rotating frame.
According to an embodiment of the present disclosure, the radiographic inspection apparatus further comprises a driving device including: the motor drives the rotating frame to rotate relative to the fixed frame through the conveyor belt.
According to one embodiment of the present disclosure, a plurality of balls are provided between the fixed frame and the rotating frame.
Drawings
FIG. 1 illustrates a simplified schematic diagram of a radiographic inspection device of an exemplary embodiment of the present disclosure;
FIG. 2 shows a top view of the radiographic inspection apparatus shown in FIG. 1;
FIG. 3 illustrates a simplified schematic diagram of scanning an inspection item in one inspection lane in accordance with an exemplary embodiment of the present disclosure;
FIG. 4 illustrates a simplified schematic diagram of a radiographic inspection device according to another exemplary embodiment of the present disclosure; and
fig. 5 shows a workflow diagram of a radiographic inspection apparatus of an exemplary embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without any inventive step, are intended to be within the scope of the present disclosure.
In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are presented only for the convenience of describing and simplifying the disclosure, and in the absence of a contrary indication, these directional terms are not intended to indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the disclosure; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
In the description of the present disclosure, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present disclosure.
According to a general inventive concept of the present disclosure, there is provided a radiation inspection apparatus including: a fixed frame, a plurality of inspection channels, a scanning device, and a controller. The fixed frame has a substantially circular ring shape. A plurality of inspection channels are arranged in a circumferential direction inside the fixed frame, each inspection channel being adapted to carry an object to be inspected. The scanning device includes: a radiation source 2 mounted in the center of the fixed frame, the radiation source generating a radiation beam capable of irradiating each inspection passage; and receiving means mounted on the fixed frame in a manner extending in the circumferential direction and adapted to receive the radiation beam passing through each of the inspection channels. The controller is suitable for controlling the scanning device to sequentially scan and inspect the target in each inspection channel.
FIG. 1 illustrates a simplified schematic diagram of a radiographic inspection device of an exemplary embodiment of the present disclosure; FIG. 2 shows a top view of the radiographic inspection apparatus shown in FIG. 1; FIG. 3 illustrates a simplified schematic diagram of scanning an inspection item in one inspection lane in accordance with an exemplary embodiment of the present disclosure.
In an exemplary embodiment, referring to fig. 1-3, a radiographic inspection device 100 is adapted to inspect objects 200, such as luggage, bags, parcels, and the like, for the presence of contraband items such as control knives, guns, drugs, explosives, and the like, in stations, airports, stadiums, malls, and the like where personnel are mobile. The radiation inspection apparatus 100 includes: a fixed frame 5, a plurality (4 as shown) of examination channels 1, a scanning device and a controller. The fixed frame 5 has a substantially circular ring shape and is mounted on the base 51 in an upright manner. A plurality of inspection channels 1 are arranged side by side in the circumferential direction inside said fixed frame 5, each inspection channel 1 being adapted to carry an object 200 to be inspected, each inspection channel 1 being provided in a sector area between the centre of the circle and the outer periphery of the fixed frame 5. The scanning device comprises a radiation source 2 and a receiving device 3. A radiation source 2 is mounted in the center of the stationary frame 5, a radiation beam 21, for example an X-ray beam, generated by the radiation source 2 being able to irradiate each examination channel 1 in turn; receiving means 3 are mounted on said fixed frame 5 in such a way as to extend in said circumferential direction and are adapted to receive said radiation beam 21 through each of said examination channels 1. The controller is adapted to control the scanning device to scan and inspect the target 200 in each inspection channel 1 in turn.
According to the radiographic inspection apparatus 100 of the embodiment of the present disclosure, the scanning device scans and inspects the target 200 in each inspection passage 1 in turn. Therefore, a plurality of inspection channels can share one scanning device, and each inspection channel can independently scan and inspect the inspected object, so that the inspection efficiency is improved.
In an embodiment the radiation source 2 is arranged rotatable around a rotational axis and generates a radiation beam 21 having a fan-shaped cross-section. The radiation source 2 is rotated one revolution and emits a radiation beam 21 into each examination channel in turn. Further, the receiving means 3 is arranged to move in a circumferential direction on the fixed frame 5 relative to the centre of the fixed frame. The receiving means 3 may receive said radiation beam 21 through each of said examination channels 1. The controller controls the scanning device which moves to the vicinity of one of the plurality of inspection channels 1 to perform scanning inspection on the target 200 in the one inspection channel 1.
In an exemplary embodiment, the radiation inspection apparatus 100 further comprises a synchronization module 4, wherein the synchronization module 4 is adapted to control the receiving device 3 to move on the fixed frame 5 in a circumferential direction relative to the center of the fixed frame at the same angular speed as the radiation source 3 rotates at the center of the fixed frame 5, so that the scanning device 2 can move to the vicinity of each inspection channel 1 in turn, and the radiation beam 21 emitted by the radiation source 2 can be accurately projected onto the receiving device 3 after passing through the inspection channel 1. Thus, the size of the receiving means 3 need only correspond to the projection range of the radiation beam 21 emitted by the radiation source 2, and the receiving means 3 need not surround the entire stationary frame 5.
In an alternative embodiment, the receiving means 4 may be arranged stationary with respect to the stationary frame 5 and comprise a plurality of sub-receiving means arranged in said circumferential direction, which sub-receiving means are arranged to receive the radiation beams traversing a plurality of examination channels, respectively. That is, the plurality of sub-receiving means surrounds the fixing frame 5 one turn in the circumferential direction of the fixing frame 5. In this way, during the rotation of the radiation source 2, the radiation beam 21 impinging on any one of the examination channels 1 can reach the corresponding sub-receiving means.
In an alternative embodiment, the radiation source is adapted to generate a radiation beam that radiates in a circumferential direction of 360 degrees, i.e. the radiation beam generated by the radiation source may impinge on a plurality of examination channels simultaneously. Further, the receiving device is arranged to move on the fixed frame 5 in a circumferential direction relative to a center of the fixed frame 5 to sequentially receive the radiation beams passing through the plurality of inspection channels to sequentially scan and inspect the targets in the plurality of inspection channels. In another embodiment, the receiving arrangement comprises a plurality of sub-receiving arrangements arranged in the circumferential direction, the plurality of sub-receiving arrangements being arranged to receive the radiation beams traversing a plurality of inspection channels, respectively. That is, the plurality of sub-receiving means surrounds the fixing frame 5 one turn in the circumferential direction of the fixing frame 5. In this way, the radiation beam 21 of the radiation source impinging on any of the examination channels 1 can reach the corresponding sub-receiving means.
Referring to fig. 1-3, in an exemplary embodiment, each of the inspection channels 1 includes: an inspection space 16 is defined by the housing 11, and the housing 11 includes a support frame and a shielding material covering the support frame to prevent radiation leakage. Each inspection channel 1 further comprises a first sensor 17, the first sensor 17 being adapted to detect the presence of the object 200 being inspected in the inspection channel 1, the controller controlling the scanning device to scan and inspect the object only when the first sensor 17 detects that there is an object in the inspection channel. That is, if the first sensor 17 detects that the object 200 to be inspected does not exist in the inspection passage 1, the controller controls the scanning device to turn off the scanning device while passing through the inspection passage where the object 200 does not exist. In this way, the radiation beam 21 does not impinge on the examination passage in which no object is present, and the passenger is not exposed to the radiation beam during the placing of the object 200 to be examined in the examination passage 1. The first sensor 17 may comprise a weight sensor, or an optical sensor, arranged at the bottom of the inspection channel.
In an exemplary embodiment, each of the inspection channels 1 further comprises: at least one shutter 14 is arranged at least one of an entrance and an exit of the examination space 16 and is arranged to close the entrance and the exit during a scanning examination after placing an object 200 to be examined in the examination space 16 of the examination channel 1 and/or when the scanning device detects suspicious objects in the object 200. In fig. 1, 4 inspection channels 16 are shown, one gate 14 being closed or open, one gate being in a fully closed state and one gate being in a fully open state.
In one embodiment, a shutter 14 is provided at both the entrance and exit of the examination space 16 to close the shutter 14 at both the entrance and exit after the object 200 is placed in the examination space 16 at the entrance. During the scanning and/or in the case of a scanning device scanning and checking that the object 200 has suspicious objects, the gates at the entrance and exit are continuously closed to prevent the passenger from removing the object 200, while the alarm of the radiographic inspection device 100 emits an acoustic and/or optical warning prompting the inspector to open the gate at the entrance or exit to remove the object 200 with suspicious objects for further processing. In the event that the scanning device scans the object 200 for non-suspect items, the gates at the entrance and exit are automatically opened to allow the passenger to remove the object 200 and to allow the next object to be placed in the examination space 16. In this way, objects to be inspected, such as packages, luggage, etc., for different passengers may be placed in sequence in the inspection space 16 and subjected to scanning inspection independently of each other without interference.
In an alternative embodiment, the examination space 16 is provided with only one opening, and the object 200 is placed into the examination space 16 or removed from the examination space at this opening. A shutter 14 is provided at the opening to close the shutter 14 after the object 200 is placed in the inspection space 16 at the opening. In the event that the scanning device scans the object 200 for suspicious objects, the gate 14 is kept closed to prevent the passenger from taking out the object 200, and the alarm of the radiographic inspection apparatus 100 sounds an audible and/or visual alarm to prompt the inspector to open the gate 14 at the opening and take out the object 200 with suspicious objects for further processing. In the event that the scanning device scans the object 200 for absence of suspicious items, the gate is automatically opened to allow the passenger to remove the object 200 and to allow the next object to be placed into the examination space 16.
In an exemplary embodiment, each of the inspection channels 1 further comprises: a second sensor 15 adapted to detect the closing or opening of said shutter 14. The second sensor may comprise an electrical proximity switch, a magnetic proximity switch, or an optical sensor. The controller controls the scanning device to scan and inspect the target 200 in the inspection space 16 only when the second sensor 14 detects that the at least one shutter 14 is closed. That is, if the second sensor detects that the shutter 14 is not closed, the scanning device does not perform the scanning inspection on the inspection passage whose shutter is not closed, so that the object 200 can be prevented from being put in or taken out during the scanning inspection.
In an exemplary embodiment, the scanning device further comprises a shielding device 22, the shielding device 22 being adapted to prevent the radiation beam 21 emitted from the radiation source 2 from being emitted into the examination space 16 when the first sensor 17 of the examination channel 1 detects that no object 200 is present in the examination space 16 or when the second sensor 15 of the examination channel 1 detects that the shutter 14 is open. That is, in case the examination space does not have a target, or allows to put in or take out a target, indicating that the examination channel 1 is not ready, the shielding device 22 will block the radiation beam 21 emitted by the radiation source 2 during passage of the scanning device through the examination channel 1, such that the radiation beam 21 does not impinge into the examination space. Such a shielding is particularly suitable for a radiation source which continuously emits a radiation beam.
In an alternative exemplary embodiment, the controller switches off the radiation source 2 of the scanning device that is moved into the vicinity of the examination channel 1, such that the radiation beam 21 is not generated by the radiation source 2, when the first sensor 17 of the examination channel 1 detects that no object 200 is present in the examination space 16, or when the second sensor 15 of the examination channel 1 detects that the shutter 14 is open, i.e. the examination channel is not ready. For example, in case the radiation source is arranged to generate a pulsed radiation beam, it may not be necessary to install a shutter type shielding device, controlling the radiation source 2 to be turned off directly by the controller when the radiation source 2 passes through the examination channel 1 which is not ready.
In an exemplary embodiment, when the first sensor 17 of the inspection channel 1 detects that there is no target 200 in the inspection space 16, or when the second sensor 15 of the inspection channel 1 detects that the gate 14 is open, i.e., the inspection channel is not ready, the controller controls the driving device 4 to drive the scanning device to pass through the inspection channel 1 at a faster speed to reach the next inspection channel quickly, thereby improving the scanning inspection efficiency.
In an exemplary embodiment, referring to fig. 1-4, the radiation source 2 is adapted to emit a plurality of (two shown) angled radiation beams 21 towards the same examination channel. The receiving means 3 comprise a plurality of sets of detector arrays having receiving surfaces arranged at an angle to each other for receiving a plurality of angled radiation beams 21, respectively. The sets of detector arrays may receive the radiation beams 21 radiated from different radiation directions so that different angle scan images of the object 200 may be obtained. Therefore, a double-view image or even a multi-view image can be formed, and the detection accuracy is improved.
Referring to fig. 1-3, in an exemplary embodiment, each of the inspection aisles 1 further comprises a conveying device 12, such as a belt conveyor, disposed in a lower portion of the inspection space 11 and adapted to convey the objects 200 in a second direction F2 perpendicular to the first direction F1. The object 200 placed in the inspection passage 1 is moved to the inside of the inspection space 11 under the conveyance of the conveyance device 12. In the case where the inspection space 11 is provided with an entrance and an exit, the transport device 12 transports the object 200 from the entrance to the exit and takes the object out at the exit. In an alternative embodiment, where the examination space 11 is provided with only one opening, the transport device 12 transports the object 200 from the opening to approximately the middle of the examination space 11 and after receiving the scanning examination transports the object back to the opening and takes it out at the opening. Further, at the entrance and/or exit of the examination channel a shielding curtain 13 is provided which shields the radiation beam 21 in the examination channel 1, through which the object 200 enters or exits the examination channel 1.
Those skilled in the art will appreciate that the delivery device 12 is not required. In an alternative embodiment, no transport device may be provided, so that the object is not moved in the case of being introduced into the examination channel 1. Because the scanning device can move horizontally, the scanning inspection of the target placed in the inspection passage can be realized. Further, the entrance and exit of the inspection passage may be provided without a shielding curtain to further simplify the structure of the radiographic inspection apparatus.
Referring to fig. 1-3, in an exemplary embodiment, the radiographic inspection apparatus 100 further includes an annular rotating frame 5, the rotating frame 5 being rotatably mounted on the fixed frame 4, and the receiving device 3 being mounted on the rotating frame 5 so as to rotate with the rotating frame 5. It will be appreciated that the rotational angular speed of the rotating frame 6 is the same as the rotational angular speed of the radiation source 2, so that the receiving means 3 always remains opposite the radiation source 2 to receive the radiation beam 21 emitted from the radiation source 2.
In an exemplary embodiment, the radiation inspection apparatus 100 further includes a driving device including: a motor and a conveyor belt surrounding the motor and the rotating frame 6, wherein the motor drives the rotating frame 6 to rotate relative to the fixed frame 5 through the conveyor belt.
In an exemplary embodiment, a plurality of balls 61 are provided between the fixed frame 5 and the rotating frame 6 to reduce friction between the fixed frame and the rotating frame and maintain stable rotation of the rotating frame.
Fig. 5 shows a workflow diagram of a radiographic inspection apparatus of an exemplary embodiment of the present disclosure.
The operation of the radiation inspection apparatus of the embodiment of the present disclosure will be described below by taking the radiation inspection apparatus 100 shown in fig. 1 to 3 and 5 as an example.
Referring to fig. 1-3 and 5, in performing a scanning inspection of a passenger-one object using an inspection lane, first, the passenger-one approach ray inspection apparatus 100 opens a gate at an entrance of the inspection lane 1; as soon as the passenger places an object 100, such as a suitcase or a parcel, into the first inspection lane 1, the gates of the entrance and exit of the inspection lane 1 are closed; the driving device drives the radiation source and the receiving device of the scanning device to move to a first inspection channel, the radiation source emits radiation beams, and scanning and inspecting the target within the first inspection channel [ gold pegging 1 ]; if the result of the scanning inspection shows that the target has suspicious articles, the gate is kept closed, and an alarm is given to prompt staff; the staff operates to open the gate and take out the target for further inspection and processing; on the other hand, if the results of the scanning inspection indicate that the object does not have suspicious items therein, the object is safe and the control gate is opened to allow the passenger to remove his object before leaving the inspection area.
And sequentially checking the targets of the second passenger, the third passenger or the fourth passenger according to the operation sequence.
Fig. 4 shows a simplified schematic diagram of a radiographic inspection device according to another exemplary embodiment of the present disclosure. The radiographic inspection device shown in fig. 4 is provided with two inspection channels 1. The reference numerals shown in fig. 4 denote the same components and have the same functions as those shown in fig. 1, and the description thereof will be omitted.
In the above embodiment, the description has been made by taking an example in which a row of inspection channels includes 4 independent inspection channels. It will be appreciated by those skilled in the art that an appropriate number of inspection channels, for example 3 or 5, may be provided according to the needs of the user. Although in the illustrated embodiment the cross-section of the examination channel is substantially rectangular, it will be appreciated by those skilled in the art that the cross-section of the examination channel may be fan-shaped and that the examination channel is arranged on a circumference between the stationary frame and the radiation source.
According to the radiographic inspection apparatus provided in the above-mentioned embodiments of the present disclosure, one or more columns of receiving devices (detector arrays) are mounted on the fixed frame in such a manner as to extend in the circumferential direction, a radiation source for generating an X-ray beam is rotatably mounted in the center of the fixed frame, and a radiation beam generated by the radiation source can be irradiated onto the receiving devices, thereby sequentially performing a scanning inspection on the target in each inspection passage. In the radiation direction of the radiation source, the radiation source can be divided into a plurality of inspection channels with different sizes according to requirements, the scanning inspection of the target in the inspection channel is completed through the matching of the detector array and the radiation source, and the intelligent image judgment is carried out. Each inspection channel can independently form images and independently put and take the object to be inspected, so that the aim of simultaneously performing security inspection by multiple persons is fulfilled, and the security inspection efficiency is greatly improved.
The ray inspection equipment of the embodiment of the disclosure can be arranged in places like stadiums, cinemas, markets, concerts and other large-scale gathering activities, so that a large amount of concentrated people can rapidly pass through security inspection, and the security inspection cost is low.
It will be appreciated by those skilled in the art that the embodiments described above are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without conflict in structure or principle.
While the present disclosure has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of the preferred embodiments of the disclosure, and should not be construed as limiting the disclosure. Although a few embodiments of the disclosed inventive concept have been shown and described, it will 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 appended claims and their equivalents.
Claims (19)
1. A radiographic inspection apparatus (100) comprising:
a fixed frame (5) having a substantially circular ring shape;
a plurality of inspection channels (1) arranged in a circumferential direction inside the fixed frame, each inspection channel being adapted to carry an object (200) to be inspected;
a scanning device, comprising:
a radiation source (2) mounted in the centre of the fixed frame and adapted to generate a beam of radiation capable of radiating to each inspection channel;
receiving means (3) mounted on said fixed frame in a manner extending in said circumferential direction and adapted to receive said radiation beam passing through each of said inspection channels; and
and the controller is suitable for controlling the scanning device to sequentially scan and inspect the targets in each inspection channel.
2. A radiographic inspection apparatus according to claim 1, wherein the radiation source is arranged to be rotatable about an axis of rotation.
3. A radiographic inspection apparatus according to claim 2, wherein the receiving means is arranged to move in a circumferential direction on the fixed frame relative to the centre of the fixed frame.
4. A radiographic inspection apparatus according to claim 3, further comprising a synchronization module (4) adapted to control the angular velocity at which the receiving means moves on the fixed frame in a circumferential direction relative to the centre of the fixed frame to be the same as the angular velocity of the radiation source in the circular rotation of the fixed frame, so that the scanning means can move in turn to the vicinity of each of the inspection channels.
5. A radiographic inspection apparatus according to claim 2, wherein the receiving means comprises a plurality of sub-receiving means arranged in the circumferential direction, the sub-receiving means being arranged to receive the radiation beams respectively passing through a plurality of inspection channels.
6. A radiographic inspection apparatus according to claim 1, wherein the radiation source is adapted to produce a beam of radiation that radiates in a circumferential direction of 360 degrees.
7. A radiographic inspection apparatus according to claim 6, wherein the receiving means is arranged to move in a circumferential direction on the fixed frame relative to the centre of the fixed frame to receive the radiation beams sequentially through a plurality of inspection channels.
8. A radiographic inspection apparatus according to claim 6, wherein the receiving means comprises a plurality of sub-receiving means arranged in the circumferential direction, the sub-receiving means being arranged to receive the radiation beams respectively passing through a plurality of inspection channels.
9. A radiographic inspection apparatus according to any one of claims 1 to 8, wherein each said inspection channel includes: a first sensor (17) adapted to detect the presence of the target in the inspection channel, the controller controlling the scanning device to scan the target only when the first sensor detects that the target is in the inspection channel.
10. A radiographic inspection apparatus according to claim 9, wherein each said inspection channel further comprises:
at least one shutter (14) disposed at least one of an entrance and an exit of the inspection tunnel and configured to close the entrance and the exit during a scanning inspection after an object under inspection is placed in the inspection tunnel and/or when the scanning device inspects the object for suspicious items.
11. A radiographic inspection apparatus according to claim 9 or 10, wherein each said inspection channel comprises: a second sensor (15) adapted to detect the closing or opening of said shutter,
the controller controls the scanning device to scan and inspect the target in the inspection channel only when the second sensor detects that the at least one gate is closed.
12. A radiographic inspection apparatus according to claim 11, wherein the scanning means further comprises shielding means (22) adapted to prevent radiation beams emitted from the radiation source from being emitted into the inspection channel when a first sensor of the inspection channel detects that no target is present in the inspection channel or when a second sensor of the inspection channel detects that the shutter is open.
13. A radiographic inspection apparatus according to claim 11, wherein the controller shuts off a radiation source of the scanning device moving to the vicinity of the inspection channel when a first sensor of the inspection channel detects that there is no target in the inspection channel or when a second sensor of the inspection channel detects that the shutter is open.
14. A radiographic inspection apparatus according to claim 12 or 13, wherein the controller controls the scanning device to pass through the inspection channel at a faster speed when a first sensor of the inspection channel detects that there is no target in the inspection channel or when a second sensor of the inspection channel detects that the shutter is open.
15. A radiographic inspection apparatus according to any one of claims 1 to 14, wherein the radiation sources are adapted to emit a plurality of angled beams (21) of radiation towards the same inspection channel; and
the receiving apparatus includes a plurality of sets of detector arrays having receiving surfaces disposed at an angle to each other to respectively receive a plurality of angled beams of the radiation.
16. A radiographic inspection apparatus according to any one of claims 1-15, wherein each of said inspection channels further comprises a transport device (12) disposed at a lower portion of said inspection channel and adapted to transport said target in a horizontal direction perpendicular to said circumferential direction.
17. A radiographic inspection apparatus according to any one of claims 1 to 16, further comprising an annular rotating frame (6) rotatably mounted on the fixed frame, the receiving means being mounted on the rotating frame so as to rotate therewith.
18. A radiographic inspection apparatus according to claim 17, further comprising a drive means, said drive means comprising:
an electric machine, and
and the motor drives the rotating frame to rotate relative to the fixed frame through the conveyor belt.
19. A radiographic inspection apparatus according to claim 17 or 18, wherein a plurality of balls (61) are provided between the fixed and rotating frames.
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| CN202311381878.XA CN117192630A (en) | 2020-11-19 | 2020-11-19 | Multi-channel radiographic inspection apparatus |
| CN202011306389.4A CN114527516B (en) | 2020-11-19 | 2020-11-19 | Multi-channel radiographic inspection apparatus |
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| CN117192630A (en) | 2023-12-08 |
| CN114527516B (en) | 2023-10-13 |
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