CN114527516B - Multi-channel radiographic inspection apparatus - Google Patents
Multi-channel radiographic inspection apparatus Download PDFInfo
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- CN114527516B CN114527516B CN202011306389.4A CN202011306389A CN114527516B CN 114527516 B CN114527516 B CN 114527516B CN 202011306389 A CN202011306389 A CN 202011306389A CN 114527516 B CN114527516 B CN 114527516B
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- 238000007689 inspection Methods 0.000 title claims abstract description 211
- 230000005855 radiation Effects 0.000 claims abstract description 111
- 238000003491 array Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 8
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- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
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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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- Health & Medical Sciences (AREA)
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- Analysing Materials By The Use Of Radiation (AREA)
Abstract
A radiographic inspection apparatus comprising: a stationary frame, a plurality of inspection channels, a scanning device, and a controller. The fixed frame has a generally circular shape. A plurality of inspection channels are arranged in a circumferential direction inside the stationary frame, each inspection channel being adapted to carry an object under inspection. The scanning device includes: a radiation source 2 mounted in the center of the stationary frame, the radiation beam generated by the radiation source being capable of radiating to each inspection channel; and receiving means mounted on said stationary frame in such a manner as to extend in said circumferential direction and adapted to receive said radiation beam passing through each of said examination channels. The controller is adapted to control the scanning device to scan and inspect the object in each inspection channel in turn. Multiple inspection channels may share a single scanning device, and each inspection channel may perform an 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 that can place an object under inspection at multiple locations.
Background
On the basis of public safety requirements, in large public places such as large exhibitions, temporary highway checkpoints, side inspection ports, stadiums and the like, a load-bearing security inspection system is often used for non-invasive inspection of objects such as luggage or packages, and a vehicle-mounted, e.g. radiographic inspection device is used for inspecting whether forbidden articles such as drugs and explosives exist in the objects. The radiographic inspection apparatus mainly includes an inspection channel and a scanning device. The object under examination is usually transported through an examination tunnel of a radiographic examination apparatus by means of a transport structure, the scanning device mainly comprising a radiation source mounted on one side of the examination tunnel and adapted for emitting a beam of X-radiation, and a detector array mounted on the other side of the examination tunnel and adapted for receiving said beam of radiation.
In the existing radiographic inspection apparatus, the inspected object can only be subjected to scanning inspection in a single inspection channel, and the scanning device can only perform scanning inspection on the inspected object in the single inspection channel, so that the inspection efficiency is low. Radiographic inspection equipment having two channels has been developed in which the object to be inspected in each of the inspection channels is subject to scanning inspection, but each of the inspection channels requires the arrangement of a separate scanning device, thereby increasing the cost of the radiographic inspection equipment.
Disclosure of Invention
The present disclosure is directed to solving at least one of the above-mentioned problems and disadvantages of the prior art.
According to an embodiment of one aspect of the present disclosure, there is provided a radiation inspection apparatus including: a stationary frame, a plurality of inspection channels, a scanning device, and a controller. The fixed frame has a generally circular shape. A plurality of inspection channels are arranged in a circumferential direction inside the stationary frame, each inspection channel being adapted to carry an object under inspection. The scanning device includes: a radiation source 2 mounted in the center of the stationary frame, the radiation beam generated by the radiation source being capable of radiating to each inspection channel; and receiving means mounted on said stationary frame in such a manner as to extend in said circumferential direction and adapted to receive said radiation beam passing through each of said examination channels. The controller is adapted to control the scanning device to scan and inspect the object in each inspection channel in turn.
According to one embodiment of the present disclosure, the radiation source is arranged rotatable around a rotation axis.
According to one embodiment of the present disclosure, the receiving means is arranged to move in a circumferential direction on the fixed frame relative to the centre of the fixed frame.
According to an embodiment of the present disclosure, the radiation examination apparatus further comprises a synchronization module adapted for controlling an angular velocity of the movement of the receiving device on the stationary frame in a circumferential direction with respect to a center of the stationary frame to be the same as an angular velocity of the circular rotation of the radiation source on the stationary frame such that the scanning device can be moved in sequence in the vicinity of each of the examination channels.
According to an embodiment of the present disclosure, the receiving means comprises a plurality of sub-receiving means arranged in the circumferential direction, the plurality of sub-receiving means being arranged to receive the radiation beams through the plurality of examination channels, respectively.
According to one embodiment of the present 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 present disclosure, the receiving means is arranged to move in a circumferential direction on the stationary frame relative to a center of the stationary frame for sequentially receiving radiation beams through a plurality of examination channels.
According to an embodiment of the present disclosure, the receiving means comprises a plurality of sub-receiving means arranged in the circumferential direction, the plurality of sub-receiving means being arranged to receive the radiation beams through the plurality of examination channels, respectively.
According to one embodiment of the present disclosure, each of the inspection channels includes: a first sensor adapted to detect the presence or absence of the object in the inspection path, the controller controlling the scanning device to scan the object only if the first sensor detects that the object is present in the inspection path.
According to one embodiment of the present disclosure, each of the inspection channels further comprises: at least one shutter is provided on at least one of an entrance and an exit of the inspection channel and is arranged to close the entrance and the exit during a scanning inspection after placing an object under inspection into the inspection channel and/or when the scanning device detects that there is a suspicious object in the object.
According to one embodiment of the present disclosure, each of the inspection channels includes: and a second sensor adapted to detect that the shutter is closed or opened, the controller controlling the scanning device to scan the object in the inspection channel only when the second sensor detects that the at least one shutter is closed.
According to an embodiment of the present disclosure, the scanning device further comprises shielding means adapted to prevent radiation beams emitted from the radiation source from being emitted to the examination tunnel when a first sensor of the examination tunnel detects that there is no object in the examination tunnel or when a second sensor of the examination tunnel detects that the shutter is open.
According to one embodiment of the present disclosure, the controller turns off the radiation source of the scanning device that moves 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.
According to one embodiment of the present disclosure, 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.
According to an embodiment of the present disclosure, the radiation source is adapted to emit a plurality of angled radiation beams towards the same examination channel; and the receiving device comprises a plurality of groups of detector arrays, the receiving surfaces of the groups 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 channels further comprises a conveying device arranged at a lower portion of the inspection channel and adapted to convey the object in a horizontal direction perpendicular to the circumferential direction.
According to one embodiment of the present disclosure, the radiographic inspection apparatus further comprises an annular rotating frame (6) rotatably mounted on the fixed frame, the receiving device being 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 one 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 an exemplary embodiment of the present disclosure scanning an inspection item in an inspection tunnel;
FIG. 4 illustrates a simplified schematic diagram of a radiographic inspection device of another exemplary embodiment of the present disclosure; and
fig. 5 illustrates a workflow diagram of a radiographic inspection device of an exemplary embodiment of the present disclosure.
Detailed Description
The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all 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. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without carrying out the inventive task are within the scope of protection of this 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 embodiments of the present disclosure. 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 the drawings in order to simplify the drawings. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.
In the description of the present disclosure, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present disclosure and to simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be configured and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present disclosure; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
In the description of the present disclosure, it should be understood that the use of terms such as "first," "second," etc. for defining components is merely for convenience in distinguishing corresponding components, and the terms are not meant to be construed as limiting the scope of the present disclosure unless otherwise indicated.
According to one general inventive concept of the present disclosure, there is provided a radiographic inspection apparatus comprising: a stationary frame, a plurality of inspection channels, a scanning device, and a controller. The fixed frame has a generally circular shape. A plurality of inspection channels are arranged in a circumferential direction inside the stationary frame, each inspection channel being adapted to carry an object under inspection. The scanning device includes: a radiation source 2 mounted in the center of the stationary frame, the radiation beam generated by the radiation source being capable of radiating to each inspection channel; and receiving means mounted on said stationary frame in such a manner as to extend in said circumferential direction and adapted to receive said radiation beam passing through each of said examination channels. The controller is adapted to control the scanning device to scan and inspect the object in each inspection channel in turn.
FIG. 1 illustrates a simplified schematic diagram of a radiographic inspection device of one 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 an exemplary embodiment of the present disclosure scanning an inspection item in an inspection lane.
In an exemplary embodiment, referring to fig. 1-3, a radiographic inspection apparatus 100 is adapted to inspect a target 200 such as a luggage, parcel, handbag, or the like for the presence of contraband such as a regulatory knife, gun, drug, explosive, or the like in a location where personnel are mobile, such as a station, airport, stadium, mall, or the like. The radiographic inspection apparatus 100 includes: a stationary 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 upstanding 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 arranged in a sector between the centre and the outer periphery of the fixed frame 5. The scanning means comprise a radiation source 2 and a receiving means 3. A radiation source 2 is mounted in the centre of the stationary frame 5, a radiation beam 21, such as an X-ray beam, generated by the radiation source 2 being capable of being radiated to each examination channel 1 in turn; the receiving means 3 are mounted on said stationary 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 the object 200 in each examination channel 1 in turn.
According to the radiographic inspection apparatus 100 of the embodiment of the present disclosure, the scanning device performs scanning inspection on the target 200 in each inspection channel 1 in turn. Therefore, a plurality of inspection channels can share one scanning device, and each inspection channel can independently scan and inspect an inspected object, so that the inspection efficiency is improved.
In an embodiment, the radiation source 2 is arranged rotatable about a rotation axis and generates a radiation beam 21 having a fan-shaped cross section. The radiation source 2 is rotated one revolution to emit 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 with respect 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 that moves to the vicinity of one of the inspection channels 1 to scan the object 200 within the one inspection channel 1.
In an exemplary embodiment, the radiation examination apparatus 100 further comprises a synchronization module 4, the synchronization module 4 being adapted to control the angular velocity of the movement of the receiving device 3 on the stationary frame 5 in the circumferential direction with respect to the centre of the stationary frame to be the same as the angular velocity of the rotation of the radiation source 3 on the centre of the stationary frame 5, such that the scanning device 2 can be moved in sequence in the vicinity of each of the examination channels 1 and the radiation beam 21 emitted by the radiation source 2 can be accurately projected onto the receiving device 3 after passing through the examination channels 1. In this way, the dimensions of the receiving device 3 need only correspond to the projection range of the radiation beam 21 emitted by the radiation source 2, and the receiving device 3 need not surround the entire stationary frame 5.
In an alternative embodiment, the receiving means 4 may be arranged to be stationary with respect to the stationary frame 5 and comprise a plurality of sub-receiving means arranged in said circumferential direction, said plurality of sub-receiving means being arranged to receive radiation beams passing through a plurality of examination channels, respectively. That is, the plurality of sub-receiving means surrounds the fixed frame 5 one turn in the circumferential direction of the fixed frame 5. In this way, during 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 radiating in the 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 means is arranged to move on the fixed frame 5 in a circumferential direction with respect to a center of the fixed frame 5 to sequentially receive the radiation beams passing through the plurality of examination channels for sequentially scanning an object in the plurality of examination channels. In another embodiment, the receiving means comprises a plurality of sub-receiving means arranged in the circumferential direction, the plurality of sub-receiving means being arranged to receive the radiation beams through the plurality of examination channels, respectively. That is, the plurality of sub-receiving means surrounds the fixed frame 5 one turn in the circumferential direction of the fixed frame 5. In this way, the radiation beam 21 of the radiation source impinging on any one 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 comprises: an inspection space 16 surrounded by the housing 11, the housing 11 including a support frame and a shielding material coated on 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 whether the object 200 being inspected is present in the inspection channel 1, the controller controlling the scanning means to scan the object only if the first sensor 17 detects that the object is present in the inspection channel. That is, if the first sensor 17 detects that the object 200 to be inspected is not present in the inspection lane 1, the controller controls the scanning device to turn off the scanning device when passing through the inspection lane in which the object 200 is not present. In this way, the radiation beam 21 does not strike the examination path in which no object is present, and the passenger is not exposed to the radiation beam during the insertion of the object 200 to be examined into the examination path 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 arranged on at least one of an entrance and an exit of the inspection space 16 and arranged to close the entrance and the exit during a scanning inspection after placing an object 200 to be inspected into the inspection space 16 of the inspection channel 1 and/or when the scanning device detects that the object 200 has suspicious items therein. 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, the shutters 14 are provided at both the entrance and exit of the examination space 16 to close the shutters 14 at the entrance and exit after the target 200 is placed into the examination space 16 at the entrance. During the scanning inspection and/or in the event that the scanning device scans to inspect the object 200 for suspicious items, the gates at the entrance and exit continue to be closed to avoid passengers retrieving the object 200, while the alarm of the radiographic inspection apparatus 100 emits an audible and/or visual alert prompting the inspector to open the gate at the entrance or exit to retrieve the object 200 with suspicious items for further processing. In the event that the scanning device scans that there are no suspicious items in the object 200, the gates at the entrance and exit are automatically opened to allow a passenger to remove the object 200 and to allow a next object to be placed in the examination space 16. In this way, objects to be inspected, such as packages, suitcases, etc., of 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 in 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 an object 200 with suspicious items, the gate 14 continues to be kept closed to avoid passengers from removing the object 200, while the alarm of the radiographic inspection apparatus 100 emits an audible and/or visual alert, prompting the inspector to open the gate 14 at the opening and remove the object 200 with suspicious items for further processing. In the event that the scanning device scans that there are no suspicious items in the object 200, the gate is 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 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 the object 200 in the examination 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 scan the inspection path whose shutter is not closed, so that the object 200 can be prevented from being put in or taken out during the scan inspection.
In an exemplary embodiment, the scanning device further comprises shielding means 22, which shielding means 22 are adapted to prevent the radiation beam 21 emitted from the radiation source 2 from being emitted to 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 has no object or the object is allowed to be placed in or removed from it, which means that the examination path 1 is not in a ready state, the shielding means 22 will shield the radiation beam 21 emitted by the radiation source 2 during the passage of the scanning device through the examination path 1, so that the radiation beam 21 does not impinge on the examination space. Such a shielding device is particularly suitable for use in a radiation source that continuously emits a radiation beam.
In an alternative exemplary embodiment, the controller shuts off the radiation source 2 of the scanning device that is moved to the vicinity of the examination channel 1 when the first sensor 17 of the examination channel 1 detects that no target 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, so that the radiation source 2 does not generate a radiation beam 21. For example, in case the radiation source is arranged to generate a pulsed radiation beam, it may not be necessary to install a shutter shielding device, the radiation source 2 being controlled 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 the object 200 is not present in the inspection space 16 or when the second sensor 15 of the inspection channel 1 detects that the shutter 14 is open, i.e. the inspection channel is not ready, the controller controls the driving means 4 to drive the scanning means through the inspection channel 1 at a faster speed to reach the next inspection channel rapidly, thereby improving the scanning inspection efficiency.
In an exemplary embodiment, see fig. 1-4, the radiation source 2 is adapted to emit a plurality (two shown) of angled radiation beams 21 towards the same examination channel. The receiving means 3 comprise a plurality of groups of detector arrays, the receiving surfaces of which are arranged at an angle to each other for receiving a plurality of angled said radiation beams 21, respectively. Multiple sets of detector arrays may receive radiation beams 21 radiating from different radiation directions so that scanned images of different angles of the target 200 may be obtained. Thus, a double-view image and 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 said inspection channels 1 further comprises a conveying device 12, such as a belt conveyor, arranged in a lower part of said inspection space 11 and adapted to convey said objects 200 in a second direction F2 perpendicular to the first direction F1. The object 200 placed in the examination path 1 is moved into the interior of the examination space 11 under the conveyance of the conveying device 12. In the case where the inspection space 11 is provided with an inlet and an outlet, the conveying device 12 conveys the target 200 from the inlet to the outlet, and takes out the target at the outlet. In an alternative embodiment, in case the examination space 11 is provided with only one opening, the transporting means 12 transport the object 200 from the opening to a substantially middle part of the examination space 11 and after receiving the scanning examination transport the object back to the opening and take it out at the opening. Further, at the entrance and/or exit of the examination tunnel, a shielding curtain 13 is provided, which shields the radiation beam 21 in the examination tunnel 1, through which the object 200 enters or exits the examination tunnel 1.
Those skilled in the art will appreciate that the delivery device 12 is not required. In an alternative embodiment, no conveying means may be provided, so that the object is not moved in the case of insertion into the examination tunnel 1. Since the scanning device can be moved horizontally, scanning inspection of the object placed in the inspection channel can be achieved. Further, shielding curtains may not be provided at the entrance and exit of the examination tunnel to further simplify the construction of the radiographic examination apparatus.
Referring to fig. 1-3, in an exemplary embodiment, the radiographic inspection device 100 further comprises an annular rotating frame 5, the rotating frame 5 being rotatably mounted on the stationary frame 4, the receiving means 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 velocity of the rotating frame 6 is the same as the rotational angular velocity of the radiation source 2 such 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 radiographic inspection device 100 further comprises a drive arrangement comprising: a motor and a conveyor belt surrounding the motor and the rotating frame 6, said motor driving said rotating frame 6 to rotate relative to said fixed frame 5 via said 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 illustrates a workflow diagram of a radiographic inspection device of an exemplary embodiment of the present disclosure.
The operation of the radiographic inspection apparatus according to the embodiment of the present disclosure will be described below by taking the radiographic inspection apparatus 100 shown in fig. 1 to 3 and 5 as an example.
Referring to fig. 1 to 3 and 5, in scanning an object of a first passenger by using an inspection lane, first, the first passenger approaches a radiographic inspection apparatus 100, and a shutter at an entrance of the inspection lane 1 is opened; a passenger puts a target 100 such as a trunk or a package into the first inspection channel 1, and gates of an entrance and an exit of the inspection channel 1 are closed; the driving device drives the radiation source and the receiving device of the scanning device to move to the first inspection channel, the radiation source emits radiation beams, and the scanning inspection is carried out on the targets [ Jin Wei and 1] in the inspection channel; if the scanning and checking result shows that the target has suspicious articles, the gate is kept closed and the alarm prompts the staff; the staff performs operation to open the gate and take out the target for further inspection; on the other hand, if the scan inspection results indicate that the object does not have suspicious items, the object is safe, the control gate is opened to allow the passenger to take his or her object away and then leave 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 of another exemplary embodiment of the present disclosure. The radiographic inspection apparatus 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 a detailed description thereof will be omitted.
In the above embodiment, the description was given taking an example in which a row of inspection channels includes 4 individual inspection channels. Those skilled in the art will appreciate that an appropriate number of inspection channels, for example 3 or 5, may be provided, as desired by the user. Although in the illustrated embodiment the cross-section of the inspection channel is generally rectangular, it will be appreciated by those skilled in the art that the cross-section of the inspection channel may be fan-shaped and that the inspection channel is disposed circumferentially between the stationary frame and the radiation source.
According to the radiographic inspection apparatus provided by the above-described embodiments of the present disclosure, one or more arrays of receiving devices (detector arrays) are mounted on the stationary frame in such a manner as to extend in the circumferential direction, and a radiation source for generating an X-ray beam is rotatably mounted in the center of the stationary frame, and the radiation beam generated by the radiation source can be irradiated onto the receiving devices, thereby scanning inspection of the target in each inspection channel in turn. 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 the requirement, the scanning inspection of the targets in the inspection channels is completed through the matching of the detector array and the radiation source, and intelligent graph judgment is performed. Each inspection channel can independently image, and the inspected targets are independently placed and taken, so that the aim of simultaneous security inspection of multiple people is fulfilled, and the security inspection efficiency is greatly improved.
The radiographic inspection equipment of the embodiment of the disclosure can be arranged in places like sports ground, movie theatres, markets, concerts and other large-scale meeting activities, so that a large amount of concentrated people flow can rapidly pass through security inspection, and the security inspection cost is low.
Those skilled in the art will appreciate that the embodiments described above are exemplary and that modifications may be made by those skilled in the art, and that the structures described in the various embodiments may be freely combined without conflict in terms of structure or principle.
Although the present disclosure has been described with reference to the accompanying drawings, the examples disclosed in the drawings are intended to illustrate preferred embodiments of the present disclosure and are not to be construed as limiting the present disclosure. Although a few embodiments of the present disclosed 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 (18)
1. A radiographic inspection apparatus (100), comprising:
a fixed frame (5) having a substantially circular 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, arranged to be rotatable about a rotation axis, and adapted to generate a radiation beam having a fan-shaped cross section which is capable of being radiated to each examination channel;
-receiving means (3) mounted on said stationary frame in such a way as to extend in said circumferential direction and adapted to receive said radiation beam passing through each of said examination channels; and
and the controller is suitable for controlling the scanning device to sequentially scan and inspect the targets in each inspection channel.
2. The radiographic inspection apparatus according to claim 1, wherein the receiving means is arranged to move on the fixed frame in a circumferential direction relative to a center of the fixed frame.
3. The radiation examination apparatus according to claim 2, further comprising a synchronization module (4) adapted for controlling an angular velocity of the movement of the receiving device on the stationary frame in a circumferential direction with respect to a center of the stationary frame to be the same as an angular velocity of the circular rotation of the radiation source on the stationary frame such that the scanning device can be moved in turn in the vicinity of each of the examination channels.
4. The radiographic inspection apparatus of claim 1 wherein the receiving means comprises a plurality of sub-receiving means arranged in the circumferential direction, the plurality of sub-receiving means being arranged to receive radiation beams passing through a plurality of inspection channels respectively.
5. The radiographic inspection apparatus of claim 1 wherein the radiation source is adapted to produce a beam of radiation that radiates in a circumferential direction of 360 degrees.
6. The radiographic inspection apparatus of claim 5 wherein the receiving means is arranged to move on the fixed frame in a circumferential direction relative to a centre of the fixed frame to receive the radiation beams through the plurality of inspection channels in sequence.
7. The radiographic inspection apparatus of claim 5 wherein the receiving means comprises a plurality of sub-receiving means arranged in the circumferential direction, the plurality of sub-receiving means being arranged to receive radiation beams passing through a plurality of inspection channels respectively.
8. The radiographic inspection device of any one of claims 1-7, wherein each of the inspection channels comprises: a first sensor (17) adapted to detect the presence or absence of the object in the inspection path, the controller controlling the scanning device to scan the object only if the first sensor detects that the object is present in the inspection path.
9. The radiographic inspection device of claim 8, wherein each of the inspection channels further comprises:
at least one shutter (14) is arranged on at least one of the entrance and exit of the inspection tunnel and is arranged to close the entrance and exit during a scanning inspection after placing an object under inspection into the inspection tunnel and/or when the scanning device detects that there is a suspicious object in the object.
10. The radiographic inspection device of claim 8, wherein each of the inspection channels comprises: a second sensor (15) adapted to detect the closing or opening of said shutter,
the controller controls the scanning device to scan the target in the inspection channel only when the second sensor detects that the at least one shutter is closed.
11. The radiographic inspection apparatus of claim 10 wherein the scanning device further comprises shielding means (22) adapted to block radiation beams emitted from the radiation source from being emitted to the inspection tunnel when a first sensor of the inspection tunnel detects that there is no target in the inspection tunnel or when a second sensor of the inspection tunnel detects that the shutter is open.
12. The radiographic inspection apparatus of claim 10 wherein the controller turns off the radiation source of the scanning device that moves into proximity with the inspection tunnel when a first sensor of the inspection tunnel detects that there is no target in the inspection tunnel or when a second sensor of the inspection tunnel detects that the gate is open.
13. The radiographic inspection apparatus of claim 11, wherein the controller controls the scanning device to pass through the inspection tunnel at a faster speed when a first sensor of the inspection tunnel detects that there is no target in the inspection tunnel or when a second sensor of the inspection tunnel detects that the shutter is open.
14. The radiation inspection device according to any one of claims 1-7, wherein the radiation source is adapted to emit a plurality of angled radiation beams (21) towards the same inspection channel; and
the receiving device comprises a plurality of groups of detector arrays, the receiving surfaces of which are arranged at an angle to each other to receive a plurality of angled radiation beams, respectively.
15. The radiographic inspection apparatus according to any one of claims 1-7, wherein each inspection channel further comprises a conveying device (12) arranged in a lower portion of the inspection channel and adapted to convey the target in a horizontal direction perpendicular to the circumferential direction.
16. The radiographic inspection device according to any one of claims 1-7, further comprising an annular rotating frame (6) rotatably mounted on the stationary frame, the receiving means being mounted on the rotating frame for rotation therewith.
17. The radiographic inspection device of claim 16, further comprising a drive arrangement comprising:
an electric motor, and
and the motor drives the rotating frame to rotate relative to the fixed frame through the conveyor belt.
18. Radiographic inspection apparatus according to claim 16, 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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| CN202011306389.4A CN114527516B (en) | 2020-11-19 | 2020-11-19 | Multi-channel radiographic inspection apparatus |
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| CN117192630A (en) | 2023-12-08 |
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