CN107479103A - Radiation checking system - Google Patents
Radiation checking system Download PDFInfo
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- CN107479103A CN107479103A CN201710846435.1A CN201710846435A CN107479103A CN 107479103 A CN107479103 A CN 107479103A CN 201710846435 A CN201710846435 A CN 201710846435A CN 107479103 A CN107479103 A CN 107479103A
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Classifications
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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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- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention discloses a kind of radiation checking system.Radiation appliance is arranged on the bottom of radiation monitoring passage, for launching flying spot beam to detection zone；Detector is arranged on top and/or the sidepiece of radiation monitoring passage, for receiving from the object to be detected transmission in detection zone or the imaging ray beam of scattering；Actuator is arranged on one or both sides in radiation monitoring passage, is advanced for dragging object to be detected along direct of travel.Control device under driving effect of the object to be detected at its own by radiation monitoring passage in the case of, radiation appliance is controlled to launch flying spot beam to detection zone with the first mode of operation, in the case of under object to be detected acts in the dragging of actuator by radiation monitoring passage, control radiation appliance launches flying spot beam with the second mode of operation to detection zone.Thus, it is possible to improve institute into picture quality, the height dimension of whole radiation checking system is reduced, and realize that double mode scans.
Description
Technical field
The present invention relates to radiation monitoring field, more particularly to a kind of radiation checking system.
Background technology
For the inspection system of middle-size and small-size passenger vehicle, it is divided into dragging scan pattern and is driving through scan mode.Dragging
Under dynamic scan pattern, when examined vehicle reaches ad-hoc location, driver and passenger need to get off, then will be by by conveying device
Check vehicle from scan channel entrance while be transported to outlet while, when being scanned through region, when vehicle is transported to ad-hoc location,
Control system control radiation source sends ray scanning vehicle.In the case where being driving through scan pattern, by driver driving vehicle by sweeping
Retouch passage.
At present, either dragging scan pattern is still driving through scan mode, and what is substantially used is all that radiation source exists
Overhead above scan channel, ray are scanned imaging to vehicle from top to down, are imitated with obtaining preferable scan image vision
Fruit.In the subtended angle of radiation source during certain and overhead, when examined vehicle is higher or wider, in order to enter to whole vehicle
For row complete scan, it is necessary to increase the distance between radiation source and inspected object, that is, increase radiation source puts height, so as to
Increase the overall height dimension of inspection system, while reduce the index of vehicle scan image.
In addition, in the case where dragging scan pattern, according to unistage type dragging system, when being scanned imaging to vehicle, institute
Transport portion in the scan image of acquisition positioned at vehicle bottom will be overlapping with vehicle sections, influences to detect.Therefore, at present
The dragging system of segmented is used mostly, to solve the problems, such as that induction system blocks ray.But this needs to solve to be examined car
Transition problem between each section of dragging system, and speed sync problem.As shown in figure 1, using two-part dragging system as
Example, according to vehicle forward direction, using principal ray beam face as boundary, upstream side is first paragraph conveyer 1, and downstream is second segment
Conveyer 2, the interlude between first paragraph conveyer 1 and second segment conveyer 2 are space.First paragraph conveyer 1 typically uses
Chain-plate type, positioned at upstream side, connect with interlude level；Second segment conveyer 2 uses chain-plate type, positioned at downstream, with centre
Duan Shuiping connects, and radiation source 3 is located at the top of interlude, and its ray sent can pass through first paragraph conveyer 1 and second segment
Space between conveyer 2, and be received by a detector.It can be seen that transport portion can be avoided to make using multisection type dragging system
Into influence, but whole transport portion structure is complex, it is necessary to ensure that the transporting velocity of adjacent conveyor section is precisely consistent.
Further, it is the different application scenario of adaptation, it is also necessary to be scanned the flexible switching of pattern, i.e. vehicle is examined
The system of looking into should provide dragging scan pattern and be driving through scan mode.Current vehicle inspection system is needed to be driving through
The vehicle of scanning is separately provided a sense channel, extra space-consuming.
Thus, it is desirable to a kind of new vehicle inspection system, to solve at least one of above-mentioned problem.
The content of the invention
It is a primary object of the present invention to provide a kind of radiation checking system for the vehicle detection that is particularly suitable for use in, it can be with
Improving into picture quality, while reducing the height dimension of whole radiation checking system, in vehicle dragging and vehicle drive
By flexibly being switched between two kinds of scan patterns.
According to an aspect of the invention, there is provided a kind of radiation checking system, for being limited along radiation monitoring passage
The object to be detected that fixed direct of travel is advanced carries out radiation monitoring, and the system includes：Radiation appliance, it is arranged on radiation monitoring
The bottom of passage, for launching flying spot beam to detection zone；One or more detectors, it is arranged on radiation monitoring passage
Top and/or sidepiece, for receive from detection zone object to be detected transmission or scattering imaging ray beam；Dragging
Device, is arranged in radiation monitoring passage the one or both sides on the width of direct of travel, actuator it is upper
The upper surface on surface and the bottom of radiation monitoring passage is remained basically stable, for dragging object to be detected along direct of travel row
Enter；And control device, under driving effect of the object to be detected at its own by radiation monitoring passage in the case of, control
Radiation appliance processed launches flying spot beam with the first mode of operation to detection zone, in object to be detected dragging in actuator
In the case that action is with the lower passage by radiation monitoring, control radiation appliance is swept with the second mode of operation to detection zone transmitting
Retouch beam.
Preferably, actuator includes：Closed loop transport mechanism, upper surface and the radiation monitoring passage of closed loop transport mechanism
The upper surface of bottom remain basically stable, the direction of transfer and direct of travel of the upper surface of closed loop transport mechanism are basically identical.
Preferably, at least one push roller is provided with closed loop transport mechanism, push roller under the driving of closed loop transport mechanism,
Object to be detected is promoted to be advanced along direct of travel.
Preferably, closed loop transport mechanism can include：Drive device, for providing driving force；Closed loop conveyer chain, push roller
It is arranged on closed loop conveyer chain, under the driving effect of drive device, driving push roller to be moved along direction of transfer, wherein,
When push roller is moved to the upper surface of closed loop conveyer chain, push roller is higher than radiation monitoring passage.
Preferably, the radiation checking system can also include：Turnover panel, it is movably disposed in closed loop transport mechanism upstream
Between the original position and radiation monitoring passage of side, after object to be detected is moved in closed loop transport mechanism along turnover panel,
Push roller boosts turnover panel under the driving of closed loop transport mechanism, and is moved to the upper surface of closed loop transport mechanism.
Preferably, the radiation checking system can also include：One or more sensors, it is separately positioned on closed loop transmission
The original position of the upstream side of mechanism and/or the end position in downstream, pass through original position for detecting object to be detected
And/or information at the time of end position.
Preferably, the radiation checking system can also include：Stopping means, it is arranged on the downstream of closed loop transport mechanism
End position and radiation monitoring passage between, will be by during for terminating the dragging to object to be detected in closed loop transport mechanism
Detection object is limited to a fixed position.
Preferably, radiation appliance can include：Scanning means, for launching flying spot beam to detection zone；And decline
Subtract device, there is multiple-working mode, the scanning for the different piece that attenuating device is launched scanning means under different working modes
The intensity of beam is decayed.
Preferably, object to be detected includes part to be detected and part is evaded in detection, in the first operation mode, is detected
The detection for surveying object evades part by during detection zone, what attenuating device was launched scanning means evades with detection
The intensity of flying spot beam is decayed corresponding to part, to cause the absorbed dose rate of part is evaded in detection to be less than default threshold
Value, in the second operation mode, attenuating device do not decay to the intensity of any flying spot beam of scanning means transmitting.
Preferably, attenuating device includes multiple attenuation units, and differential declines unit is used for the difference to scanning means transmitting
The intensity of partial flying spot beam is decayed, and control device evades the area distribution information of part according to detection, it is determined that quilt
When the forward position that part is evaded in the detection of detection object reaches detection zone, the attenuation units of work are participated in attenuating device.
Preferably, the radiation checking system can also include：Information acquisition device, be arranged in radiation monitoring passage away from
At the preset distance of detection zone upstream, the relative position information between multiple characteristic portions for obtaining object to be detected is more
Individual characteristic portion comprises at least the lead and trail edge that part is evaded in detection, and control device is according to the phase between multiple characteristic portions
To positional information, it is determined that the area distribution information of part is evaded in detection.
To sum up, radiation checking system of the invention is by the way that radiation source to be arranged on to the bottom of radiation monitoring passage, using from
Scan mode on down is scanned imaging to object to be detected (such as vehicle).Radiation source and object to be detected can be reduced
The distance between, the quality of image formed by raising, and when object to be detected is higher or lower, without to radiation source
Position be adjusted, so as to reduce the height dimension of whole radiation checking system.Can be in radiation monitoring passage
On one side or both sides set actuator.It can realize that double mode is swept in the case where not increasing the width of radiation monitoring passage
Retouch.
Brief description of the drawings
Disclosure illustrative embodiments are described in more detail in conjunction with the accompanying drawings, the disclosure above-mentioned and
Other purposes, feature and advantage will be apparent, wherein, in disclosure illustrative embodiments, identical is with reference to mark
Number typically represent same parts.
Fig. 1 is the structural representation for showing existing segmented actuator.
Fig. 2 is the schematic block diagram for the structure for showing radiation checking system according to an embodiment of the invention.
Fig. 3 A, Fig. 3 B are the structural representations for showing the actuator under one embodiment of the invention.
Fig. 4 is the structural representation for showing the radiation appliance under one embodiment of the invention.
Fig. 5 A to Fig. 5 C are the schematic diagrames for showing the attenuating device of one embodiment of the invention under different working modes.
Fig. 6, Fig. 7 are the structural representations for showing single attenuation units.
Fig. 8 A- Fig. 8 D are the schematic diagrames for showing the attenuating device of another embodiment of the present invention under different working modes.
Fig. 9 A, Fig. 9 B are the distribution schematic diagrams for showing the characteristic portion on dilly.
Figure 10 is to show structure of the radiation checking system in the case where dragging scan pattern under a specific embodiment of the invention
Schematic diagram.
Figure 10 A are the enlarged diagrams of actuator part in Figure 10.
Figure 11 is to show radiation checking system under an of the invention specific embodiment in the case where being driving through scan pattern
Structural representation.
Figure 11 A are the enlarged diagrams of actuator part in Figure 11.
Figure 12 is the side schematic view for showing the radiation checking system under a specific embodiment of the invention.
Figure 13 is the schematic top plan view for showing the radiation checking system under a specific embodiment of the invention.
Figure 14 is to show knot of the radiation checking system in the case where dragging scan pattern under another specific embodiment of the present invention
Structure schematic diagram.
Figure 15 is to show radiation checking system under another specific embodiment of the present invention in the case where being driving through scan pattern
Structural representation.
Figure 16 is the side schematic view for showing the radiation checking system under another specific embodiment of the present invention.
Figure 17 is the schematic top plan view for showing the radiation checking system under another specific embodiment of the present invention.
Embodiment
The preferred embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although this public affairs is shown in accompanying drawing
The preferred embodiment opened, however, it is to be appreciated that may be realized in various forms the disclosure without the implementation that should be illustrated here
Mode is limited.On the contrary, these embodiments are provided so that the disclosure is more thorough and complete, and can be by this public affairs
The scope opened intactly is communicated to those skilled in the art.
As described in the background section, current middle-size and small-size vehicle inspection system, what is almost used is all that radiation source is scanning
Channel roof is placed, and ray carries out transmission imaging to the vehicle that passes through from top to bottom, under this scheme, in order to higher
Object to be detected also can completely be detected, it is necessary to which radiation source to be arranged on to the position higher away from horizontal plane, this can undoubtedly increase
The height dimension of big whole system, and when being detected to highly relatively low object to be detected, radiation source and detected material
The distance between body farther out, can also influence picture quality.
In addition, during according to unistage type dragging system, transport portion will cause to be examined blocking for vehicle scan image,
The transmission image of vehicle key component is overlapping with actuator, largely influences imaging effect, therefore each manufacturer's base at present
All it is the dragging system using segmented in sheet, this solves the problems, such as that induction system blocks ray, but needs to solve to be detected
Look into transition problem of the vehicle between each section of dragging system, and speed sync problem.Further, answered for adaptation is different
With occasion, it is also necessary to can be in driver driving by flexibly being switched between scan pattern and dragging scan pattern.
In view of this, the present invention proposes a kind of new radiation checking system.The radiation checking system of the present invention will radiate
Source is arranged on the bottom of radiation monitoring passage, and object to be detected (such as vehicle) is swept using scan mode from bottom to top
Retouch imaging.Thus, it is possible to the distance between radiation source and object to be detected are reduced, the quality of image formed by raising, and
When object to be detected is higher or lower, without the position of radiation source is adjusted, so as to reduce whole radiation monitoring
The height dimension of system.Wherein, radiation source can be preferably by the radiation source compared with large angle, to ensure that radiation source is radiated
Beam whole scan channel can be covered on width.
In addition, the present invention radiation checking system also in the unilateral or bilateral setting actuator of radiation monitoring passage, and
And actuator is placed in below the bottom water plane of radiation monitoring passage, center section is normal radiation detection passage.Its
In, can be unistage type dragging system or multisection type dragging system in the actuator of unilateral or bilateral setting, it is excellent
Selection of land is unistage type dragging system.Thus, while avoiding actuator from impacting scanning, dragging can also be simplified
The structure of device, reduces cost.Also, while the width of radiation monitoring passage is not increased, it is possible to achieve swept in dragging
The flexible switching retouched pattern and be driving through between scan pattern.
Further, the intensity for the light that the present invention also sets up the different piece that can be sent to radiation source is decayed
Attenuating device so that the radiation appliance being made up of radiation source and attenuating device has multiple-working mode.So spoke of the present invention
Inspection system is penetrated when drawing type scan pattern and active are flexibly switched between the two by formula scan pattern, Ke Yigen
According to selected scan pattern, control radiation appliance launches flying spot beam with different working modes.
Fig. 2 is the schematic block diagram for the structure for showing radiation checking system according to an embodiment of the invention.
Referring to Fig. 2, radiation checking system 200 includes radiation appliance 210, one or more detectors 220, actuator
230 and control device 240.
Radiation appliance 210 and detector 220 form radiation imaging apparatus, wherein, radiation appliance 210 and the structure of detector 220
Into radiation imaging apparatus can be that transmission-type radiation imaging apparatus can also be scattering formula radiation imaging apparatus, such as can be
Back-scatter radiation imaging device.Concrete structure on radiation appliance 210 and detector 220 is described below, here
It wouldn't repeat.
Radiation appliance 210 is arranged on the bottom of radiation monitoring passage, for launching flying spot beam to detection zone.One
Individual or multiple detectors 220 are arranged on top and/or the sidepiece of radiation monitoring passage, for receiving from the quilt in detection zone
Detection object transmits or the imaging ray beam of scattering.Wherein it is preferred to radiation appliance 210 can be arranged on radiation monitoring passage
Bottom water plane below, the radiation monitoring passage directly over radiation appliance 210 can open up the gap of one fixed width so that
Obtaining the flying spot beam that radiation appliance 210 is launched can go out be shot out by the gap opened up.Detection zone can refer to scan
Propagation regions of the beam in radiation monitoring passage, limited in the direction of propagation of flying spot beam and radiation monitoring passage
In the case that direct of travel is vertical, detection zone is the face region of the direct of travel limited perpendicular to radiation monitoring passage.
Actuator 230 is arranged on the side or two on the width of direct of travel in radiation monitoring passage
Side, the upper surface of the upper surface and the bottom of radiation monitoring passage of actuator is remained basically stable, for dragging object to be detected edge
Direct of travel traveling.Thus, actuator 230 can be unilateral actuator or bilateral actuator, drag
Device 230 can drive object to be detected overall along direct of travel row by dragging one side or both sides of object to be detected
Enter.
Control device 240 under driving effect of the object to be detected at its own by radiation monitoring passage in the case of,
Radiation appliance 210 can be controlled to launch flying spot beam to detection zone with the first mode of operation, dragged in object to be detected
The dragging effect of device 230 is lower by that in the case of radiation monitoring passage, can control radiation appliance 210 with the second Working mould
Formula launches flying spot beam to detection zone.Wherein, the first mode of operation and the second mode of operation are led to object to be detected respectively
Overshoot checks that the concrete mode of passage is corresponding.
So that object to be detected is vehicle as an example, in the case where driver driving vehicle is by radiation monitoring passage, it is necessary to right
Personnel distributed areas on vehicle carry out evading detection, avoid on vehicle personnel by higher dose of radiation.In driver, multiply
Visitor is got off, and when passing through radiation monitoring passage by actuator dragging vehicle, whole vehicle normally can be detected.Therefore,
Under first mode of operation, radiation appliance can be carried out evading detection to personnel distributed areas on vehicle, and other regions are carried out just
Often detection, in the second operation mode, radiation appliance can normally be detected to whole vehicle.Wherein, evading detection can
To refer to a pair flying spot Shu Jinhang decay corresponding with personnel distributed areas on vehicle.Thus, in the radiation monitoring of the present invention
When system is applied to vehicle detection, it can be carried out between the two by formula scan pattern in drawing type scan pattern and active
Flexibly switching.
So far combining Fig. 2, just the basic structure of the radiation checking system 200 of the present invention and operation principle have been done briefly
It is bright.The Each part for just forming radiation checking system 200 below is described further.
First, actuator
In the present invention, actuator can be single hop actuator or multistage actuator, it is therefore preferable to
Single hop actuator, wherein, single hop actuator refers to from inlet region, scanning area, is one whole section to outlet area, and centre is not broken
Open.Also, actuator can be arranged on the one side in radiation monitoring passage insied width direction, carry out unilateral dragging, can also set
Put on the both sides in radiation monitoring passage insied width direction, carry out bilateral dragging.So that object to be detected is vehicle as an example, dragging dress
It can be unilateral actuator to put, and drag the direct of travel traveling that the unilateral wheel of vehicle limits along radiation monitoring passage；
Actuator can also be bilateral actuator, drag the traveling side that the bilateral wheel of vehicle limits along radiation monitoring passage
To traveling.Wherein, actuator can drive vehicle to move by the front-wheel of stroller, can also the trailing wheel of stroller drive
Vehicle moves, it is preferable that can be with the front-wheel of stroller.
The direct of travel one-way movement that actuator can limit along radiation monitoring passage, can also bidirectional-movement.
In the present invention, actuator can preferably use closed loop transport mechanism, and closed loop transport mechanism can circulate according to a direction
Ground is rotated to promote object to be detected.It can be circulated for example, closed loop transport mechanism can be that ring chain, carrier bar etc. are a variety of
Reciprocating device.Wherein, can be single-chain structure or chain structure when using chain drive.Close
The direct of travel that the direction of transfer of the upper surface of ring transport mechanism should be arranged to radiation monitoring passage limits is consistent or basic
Unanimously.
The agent structure of closed loop transport mechanism may be mounted at below the bottom water plane of radiation monitoring passage, and cause
The upper surface of closed loop transport mechanism and the upper base surface of radiation monitoring passage remain basically stable.Wherein, in radiation monitoring passage
When bottom is ground, the agent structure of closed loop transport mechanism can be arranged in ground, be arranged to liftoff in radiation monitoring passage
When face has the ramp structure of certain altitude, the agent structure of closed loop transport mechanism can be set in ramp.
Fig. 3 A are to show side view when actuator uses single-chain transmission device, and Fig. 3 B are top view.
As shown in Fig. 3 A, Fig. 3 B, actuator can include drive device 1133 and closed loop conveyer chain 1134.
Drive device 1133 is used to provide driving force for the motion of closed loop conveyer chain 1134, and it can be motor and deceleration
The multiple drive such as machine or hydraulic motor and reductor.
Closed loop conveyer chain 1134 can do iterative motion under the driving effect of drive device 1133.Closed loop transmits
The chain of chain 1134 can be less than the lower surface of radiation monitoring passage, can now be set on the chain of closed loop conveyer chain 1134
There are one or more push rollers, push roller can move with driving-chain, and it can be with the trailer portion of object to be detected (such as vehicle
Wheel) directly contact, promote the direct of travel traveling that object to be detected limits along radiation monitoring passage as impeller.
In the present invention, the radiation monitoring passage directly over closed loop conveyer chain 1134 is properly termed as delivery track 1130, defeated
The gap of one fixed width can be provided with along on the direction of traveling by sending on track 1130, to enable push roller to pass through the gap
The top of delivery track 1130 is moved to, and object to be detected is driven along conveying with the rotation of closed loop conveyer chain 1134
Track 1130 is advanced.
For improving transfer efficiency and saving the consideration of the energy, can be set on the chain of closed loop conveyer chain 1134 more
Individual push roller, thus closed loop conveyer chain 1134 in rotation process, can utilize multiple push rollers simultaneously promote multiple objects to be detected
Moved along the direction of delivery track 1130.As shown in Figure 3A, an alternative embodiment as invention, can closed
Two symmetric positions on ring conveyer chain 1134 set the first push roller 11311 and the second push roller 11312 respectively.Wherein, first
When the push roller 11312 of push roller 11311 or second is moved to the upper surface of closed loop conveyer chain, push roller is higher than radiation monitoring channel bottom
Upper surface.
As shown in Figure 3A, may be used also between the original position of closed loop transport mechanism upstream side and radiation monitoring passage 1091
Movably to set a turnover panel 1140.In the trailer portion of object to be detected delivery track is moved to along turnover panel 1140
After on 1130, corresponding push roller (the first push roller 11311 or the second push roller 11312) can be with closed loop conveyer chain 1134
Rotate, boost turnover panel 1140, and be moved on delivery track 1130.Hereafter, object to be detected can is made in the promotion of push roller
Under, advanced along delivery track 1130.
Further, in the original position of the upstream side of closed loop transport mechanism and/or the end position in downstream, may be used also
To set one or more sensors respectively, at the time of passing through original position and/or end position for detecting object to be detected
Information.For example, first position sensor 11361 can be set in the upstream side of turnover panel 1140, can also be under turnover panel 1140
Swim side and the 3rd position sensor 11363 is set.First position sensor 11361 can be used for detect the first push roller 11311 or
Whether the second push roller 11312 reaches suitable position below turnover panel；It is tested that 3rd position sensor 11363 can be used for detection
The trailer portion of object is surveyed whether by the arrival delivery track 1130 of turnover panel 1140.In the dragging portion for detecting object to be detected
It after lease making crosses turnover panel 1140, can just start drive device 1133, drive the first push roller 11311 or the second push roller 11312 to boost
Turnover panel 1140, and be moved on delivery track 1130, such can is promoted the trailer portion of object to be detected by push roller, is driven
Object to be detected is set to be advanced along delivery track 1130.As illustrated, can also be in the end position of closed loop conveyer chain 1134
Upstream side nearby set the 4th position sensor 11364, near the downstream of end position set second place sensor
11362.When detecting that object to be detected passes through four position sensors 11364, show to complete to object to be detected quickly
Dragging, now drive device 1133 can be controlled to slow down, detect promote object to be detected push roller reach the second place
During sensor 11362, show to have completed the dragging to object to be detected, can now control drive device 1133 to stop work
Make.
Further, as shown in Figure 3A, the downstream of closed loop transport mechanism end position and radiation monitoring passage it
Between stopping means 1150 can also be set, during for terminating the dragging to object to be detected in closed loop transport mechanism, will be detected
Object is limited to a fixed position in end position downstream, for example, so that object to be detected is vehicle as an example, push roller is by wheel
It is pushed into the position so that vehicle oneself will not slip away in the case of no brake.Closed loop transport mechanism can also include tensioning
Device 1135, it can be used for the elastic dynamics for adjusting closed loop conveyer chain 1134.
Further, as shown in Figure 3 B, spacing bumper bar 112 can be set in whole radiation monitoring passage both sides, is used for
Ensure that object to be detected is advanced along radiation monitoring passage centre position as far as possible.It can be set in the both sides of delivery track 1130
Anti- derailed side block device 1138, in being moved by actuator dragging object to be detected along delivery track, limitation to be tested
The trailer portion (such as wheel of vehicle) for surveying object does not depart from delivery track 1130.It can be set on delivery track spacing
Device 1139, limiter can control its lifting by control command, and the object to be detected of process is stopped or let pass.Example
Such as, so that object to be detected is vehicle as an example, under input mode, when vehicle is prepared to enter into delivery track 1130, limiter 1139
The initial position that will rise up to stop wheel parks, wheel is no more than the limiter, treats that system is ready, the limiter is fallen
Afterwards, it is possible to start actuator and promote wheel.
2nd, radiation appliance
The radiation appliance of the present invention is used to launch flying spot beam to detection zone.It is different from existing radiation appliance
It is that radiation appliance of the invention (can drag according to the specific scan pattern of object to be detected (vehicle) and scan or be driving through
Scanning), launch flying spot beam according to mode of operation corresponding with scan pattern.
The concrete structure and operation principle of radiation appliance are described further below.
The radiation appliance of the present invention can include scanning means and attenuating device.Scanning means is used to send out to detection zone
Penetrate flying spot beam.Detection zone is that the region of radiation monitoring is carried out to object to be detected, and detection zone can be filled by scanning
The flying spot beam for putting transmitting propagates formed region in space.Scanning means is being arranged in radiation monitoring passage
Bottom, the object to be detected (such as vehicle) for being advanced to the direct of travel that is limited along radiation monitoring passage is scanned
When, scanning means transmitting flying spot beam it is preferably vertical with the direct of travel of object to be detected, now detection zone be with
The vertical face region of the direct of travel of object to be detected.
Scanning means can be the scanning means of existing conventional configurations.For example, scanning means can include radiation source and
Collimater.Radiation source can use 160kV~450kV X-ray tube, the shielding that lead or tungsten material can be used to form around it
Device shields to the useless beam of non-directive detection zone.Wherein, screening arrangement can be designed to labyrinth shape, with
Improve shield effectiveness.Windowing can be provided with screening arrangement, the beam of radiation emission can incide collimation by windowing
Device.
Collimater can be arranged in the radiation direction of radiation source, and collimater is stitched provided with line, and collimater can pass through
The X-ray beam of line seam about radiation source beam radiation is (tested in the subtended angle of short transverse (vertical with scanning direction) and scanning direction
Survey object the direction of motion) on width.The beam of radiation emission acts on being formed to detection zone by the line of line seam
The flying spot beam of domain transmitting.
Attenuating device has multiple-working mode.Attenuating device can be launched scanning means under different working modes
The intensity of the flying spot beam of different piece is decayed, to cause the flying spot beam after decay to incide detection zone
The absorbed dose rate of the corresponding site on object to be detected in domain is less than predetermined threshold value.Wherein, corresponding site is preferably quilt
Part is evaded in detection in detection object.So that object to be detected is vehicle as an example, corresponding site can have personnel on vehicle
Such as main driving, copilot, back seat region.Wherein, predetermined threshold value can be the safety set according to actual conditions
Value, absorbed dose rate is used to weigh the energy absorption situation after object raying, when it can refer to unit during object raying
Interior absorbed dose of radiation.For the present invention, absorbed dose rate can also use single absorbed dose of radiation to characterize, and absorbed dose of radiation refers to
The energy of radiation is absorbed after unit mass material raying, single absorbed dose of radiation is that unit mass object detects in single irradiation
The energy of radiation absorbed in process.
It should be noted that when carrying out radiation monitoring to object to be detected, part is evaded in the detection of object to be detected
Single absorbed dose of radiation evades the radiation intensity positive correlation of radiated time and radiation source of the part Jing Guo radiation detection with detection.This
Invention is decayed by evading the intensity of the corresponding flying spot beam in part to radiation emission and detection, to change
The radiation intensity of radiation source, evade the radiation intensity being partially received so as to reduce detection, and then cause detection to evade part
Single absorbed dose of radiation is less than predetermined threshold value.Wherein, can be according to default to the specific attenuation degree of flying spot Shu Jinhang decay
Between the setting of threshold value, the actual travel speed of object to be detected, the radiation parameter of radiation source, radiation source and object to be detected
The many kinds of parameters such as distance determine that here is omitted.
Thus, it is possible to according to the specific detection pattern of object to be detected, the mode of operation of attenuating device is controlled, to be formed
Mode of operation of the radiation appliance under different scanning pattern.So that object to be detected is vehicle as an example, carried out in driver driving vehicle
During detection, radiation appliance can evade part warp with the first mode of operation, under the first mode of operation in the detection of vehicle
During crossing detection zone, attenuating device can control its mode of operation, to cause under the mode of operation only to scanning means
The flying spot Shu Zhongyu detections of transmitting are evaded targeted scans beam corresponding to part and decayed.So ensureing to detect
Evade part not in the case of by high-level radiation, do not influence also to evade the normal of part to the non-detection on object to be detected
Detection.Got off in personnel, by actuator dragging vehicle detected when, radiation appliance can with the second mode of operation,
Under second mode of operation, the intensity for any flying spot beam that attenuating device can not be launched scanning means decays.
It should be noted that in object to be detected there are multiple detections to evade part, and part warp is evaded in this multiple detection
When crossing detection zone, when corresponding to the flying spot beam of different piece, attenuating device can advise in multiple detections of object to be detected
Part is kept away one by one by during detection zone, controlling its mode of operation in real time, to realize to the detection Jing Guo detection zone
Evade the decay of the flying spot beam corresponding to part.Driven using object to be detected as 5 left sides, operator seat is sat on car to be had
Driver, exemplified by heel row middle seat has passenger, when driver's cabin passes through detection zone, the work of attenuating device can be controlled
Pattern so that attenuating device pair flying spot Shu Jinhang decay corresponding with left-hand drive room, pass through detection zone in back row seat
When, the mode of operation of attenuating device can be switched, control attenuating device to enter for flying spot beam corresponding to heel row middle seat
Row decay.
So far the radiation appliance of the basic structure with regard to radiation appliance of the invention and the utilization present invention are to object to be detected
The basic process for carrying out radiation monitoring briefly explains.Understood according to described above, the present invention mainly passes through attenuating device
Realize to scanning means transmitting different piece flying spot beam decay, below the operation principle with regard to attenuating device and
Concrete structure is described further.
Intensity can be reduced after ray passes through material, and this phenomenon is referred to as decaying.Different metal material (such as aluminium, iron,
Copper, lead, alloy etc.) to the attenuation coefficient difference of ray.The attenuating device of the present invention can be with stronger by one or more
Ray attenuation ability material composition, such as aluminium, iron, copper, lead, alloy etc..
Attenuating device can realize the decay to flying spot beam by blocking flying spot beam.The decay dress of the present invention
Multiple-working mode can be had by putting, and attenuating device can be to the scanning means in radiation imaging apparatus under different working modes
The intensity of the flying spot beam of different piece is decayed in the flying spot beam of transmitting.In other words, attenuating device can be right
The flying spot Shu Jinhang of different piece is blocked in the flying spot beam of scanning means transmitting, and different piece is swept with realizing
Retouch the decay of beam.
Fig. 4 is the structural representation for showing radiation appliance according to an embodiment of the invention.
In the present embodiment, scanning means can include radiation source 101, switching device 102 and collimater 104.
Radiation source 101 is used for divergent-ray beam.Radiographic source 101 nearby can set screening arrangement (not shown), shield
Labyrinth form can be designed to by covering device, be enclosed in the surrounding of radiographic source 101, screening arrangement is in the corresponding divergent-ray of radiation source 101
Position can leave window.The beam that radiation source 101 is launched can go out be shot out by window.
Switching device 102 can be made up of the stronger material such as lead, tungsten of one or more ray attenuation abilities.Switch dress
Put the occlusion state of 102 beams that can be used for the directive detection zone for controlling radiation source 101 to launch.Switching device 102 closes
It can stop that Radiolucent to detection zone, when switching device 102 is opened, can not stop any useful ray when closing completely
Launch to detection zone.Wherein, switching device 102 can be blocked by the window reserved to screening arrangement or do not blocked,
Control the occlusion state of the beam of the transmitting of radiation source 101.
Collimater 104 is stitched provided with line, and the beam that radiation source 101 is launched can be formed after line stitches to inspection
Survey the flying spot beam of field emission.
Attenuating device 130 can be by decaying, with shape to the flying spot Shu Jinhang that outgoing is stitched from the line of different parts
Into multiple-working mode.For example, attenuating device can be stitched by blocking the line of different parts, realize to going out from corresponding site
The decay for the flying spot beam penetrated.Wherein, attenuating device 120 is decayed in the intensity of the flying spot beam to appropriate section
When, it can be decayed with complete attenuation or part, as long as so that going out the tested of position corresponding to flying spot beam after decay
The absorbed dose rate for surveying object is less than predetermined threshold value.
In theory, it is likely to and object to be detected from all flying spot beams of the line seam outgoing of collimater 104
It is corresponding that part is evaded in detection.It is therefore preferred that attenuating device 130 should be configured to from line seam outgoing whole or
Most flying spot Shu Jinhang decay.
As the alternative embodiment of the present invention, attenuating device 130 can be made up of multiple attenuation units.It is multiple to decline
The different parts of line seam can be corresponded respectively to by subtracting unit, can be separate structure between multiple attenuation units, often
Individual attenuation units can be stitched by blocking the line at its corresponding position, realize the scanning to the line seam outgoing from the position
The decay of beam.Thus, by controlling different attenuation units to participate in work, you can form different mode of operations.
As shown in Figure 5A, attenuating device can be made up of 11 attenuation units S1-S11, and this 11 attenuation units can be tight
Solid matter arranges, and each attenuation units correspond to a part of line seam 1151 of collimater 104.It can be hidden by mobile attenuation units
The line seam 1151 of its corresponding part is kept off, is realized to the strong of the flying spot beam of the line seam outgoing from its corresponding part
The decay of degree.As shown in Figure 5 B, the line seam 1151 at its corresponding position can be blocked by mobile attenuation units S7, S8, it is right
Decayed from the intensity of the flying spot beam of position outgoing.As shown in Figure 5 C, mobile attenuation units S3- can also be passed through
S6 blocks another part line seam 1151, realizes the decay to the flying spot beam from the seam outgoing of another part line.
As described above, attenuating device should be preferably configured to being emitted wholly or largely from line seam
Flying spot Shu Jinhang decay.Therefore, whole or big portion can be preferably corresponded to by forming multiple attenuation units of attenuating device
Beam splitting stream seam 1151.In addition, the multiple attenuation units for forming attenuating device can also correspond only to part line seam 1151, this
When this multiple attenuation units can along line stitch 1151 direction do integral translation, to allow attenuating device to whole
Or the flying spot Shu Jinhang decay of most line seam outgoing.
When attenuating device is made up of multiple attenuation units, the length of the line seam 1151 corresponding to single attenuation units
Control accuracy of the attenuating device to flying spot beam can be considered as, the length of the line seam 1151 corresponding to single attenuation units
Shorter, the minimum controllable part of flying spot beam is smaller, and the control accuracy of attenuating device is higher.In actual applications, composition declines
Subtract the attenuation units of device number and each attenuation units corresponding to line seam 1151 length can be according to reality
Demand is set, and here is omitted.
Fig. 6 is to show a kind of structural representation that single attenuation units can have.As shown in fig. 6, attenuation units can
With including attenuation block 1212 and drive device 1211.
Attenuation block 1212 can be made up of one or more of materials with stronger ray attenuation ability, such as aluminium,
Iron, copper, lead, alloy etc..Drive device 1211 is used for the line seam 1151 for driving attenuation block 1212 to block its corresponding position,
Decayed with the intensity of the flying spot beam to the outgoing of line seam 1151 from the position, and attenuation block can also be driven
The 1212 line seams 1151 away from its corresponding position, to cause the flying spot beam from the outgoing of line seam 1151 at the position
Detection zone can be incident normally to.Drive device 1211 can be a variety of actuating units such as stretching structure, push-pull mechanism.Example
Such as, drive device 1211 can be high-speed electro-magnet.
The size of attenuation block 1212 can be set according to actual conditions.As shown in fig. 6, in general, attenuation block 1212 is hung down
It should be directly set greater than or equal to corresponding to it in from the width w on the direction of propagation of the flying spot beam of the outgoing of line seam 1151
Line seam 1151 slit width, with enable attenuation block 1212 block its corresponding position line seam 1151.Such as width
W could be arranged to the maximum slit width for being more than line seam 1151.
Attenuation block 1212 should be set along from the thickness on the direction of propagation of the flying spot beam of the outgoing of line seam 1151
For so that decay of the intensity for the flying spot beam being emitted from the line seam 1151 at its corresponding position Jing Guo attenuation block 1212
After effect, the absorbed dose rate for inciding the corresponding site on the object to be detected in detection zone is less than predetermined threshold value.
As those skilled in the known, irradiated, inhaled by beam (such as X rays) in the object at target spot R
Receive dosage can approximation be calculated as follows：
D=fX0·I·t·(R0/R)2
In formula, f is absorbed dose change coefficient (dagger-axe/human relations), X0It is R for off-target point0Ray amount of exports (the human relations/milliampere at place
Point), I is tube current (milliampere), and t is by according to time (dividing), R0To find narrow beam amount of exports X on the diagram0When, the distance of off-target point
(centimetre), R are the actual distance (centimetre) by according to point off-target point.
As can be seen from the above equation, if in the case where radiation source parameter is certain, special bit on passengers inside the car or car is reduced
The single absorbed dose of radiation of received beam is put, one of which method is the speed that raising is scanned vehicle or personnel pass through,
To reduce by the radiation exposure time, wherein another method is to increase metal filtration, a side between radiographic source scanned
The low energy ray useless to scanning probe picture quality is filtered in face, the intensity of another aspect attenuation ray, will irradiate vehicle crew
The single absorbed dose of radiation in region drops to low-down rank.Improve scanned vehicle or personnel by speed, can be certain
The accuracy of detection to the normal detection part of vehicle is influenceed in degree, therefore the present invention takes the mode to be decayed to ray
Reduce the single absorbed dose of radiation of specific position on passengers inside the car or car.
Ray pass through material after intensity can reduce, this be referred to as decay, different metal material (such as aluminium, iron, copper, lead,
Alloy etc.) to the attenuation coefficient difference of X ray.The physical quantity of description ray attenuation property is referred to as attenuation rate, its calculation formula
For：Jd=J0·e-ud.In formula, JdStrong, the J after material is passed through for ray0Intensity during material is not passed through for ray, u is ray
Attenuation coefficient, after representing that ray penetrates unit length material, the attenuation degree of intensity, d is the thickness of material.
In radiation checking system, the single absorbed dose of radiation of object to be detected is substantially from useful beam, according to tool
The demand of body single absorbed dose of radiation limit value, it is determined that attenuation block material and detecting system following several respects technical parameter it
Afterwards, the thickness of attenuation block can just be calculated.The technical parameter of described several respects is：Roentgen dose X rate at 1 meter of radiographic source
(μ Sv ﹒ m2﹒ h-1), detection evades part and evades the corresponding flying spot beam in part with the distance between radiation source (m), with detection
Incide detection and evade relative moving speed (m/s) between beam width on part, object to be detected and radiation source.
As shown in fig. 7, the length on the direction that attenuation block 1212 is stitched along line can be based on attenuation block 1212 and radiation
The angle of radiation β of flying spot beam corresponding to the distance between source 101 and attenuation block 1212 is determined.Wherein, angle of radiation
β can be considered as the control accuracy of attenuating device, and angle of radiation β is smaller, and the control accuracy of attenuating device 130 is higher.
Fig. 8 A to Fig. 8 D are the structural representations for showing the attenuating device under another embodiment of the present invention.Wherein, Fig. 8 A
For front view, Fig. 8 B are vertical view state schematic diagram when no attenuation block is blocked, and Fig. 8 C are that attenuation block S6, S8 is pushed out participation
Vertical view state schematic diagram during work.
As shown in Figure 8 A, attenuating device can be made up of 13 attenuation units S1-S13.Wherein, each attenuation units bag
Include high speed load push-pull 1051 (preferably high-speed electro-magnet), attenuation block 1052, locating rod 1053, push rod 1054.Attenuation block
1052 installations on the securing lever 1053.Locating rod 1053 is connected with the end of push rod 1054.Push rod 1054 is high speed load push-pull 1051
Moving component.
Each attenuation units self contained function, push rod can promote attenuation block quick-expansion under controller instruction, and attenuation block is stretched
The ray of corresponding block is filtered when going out, cancels ray filtering when attenuation block is retracted.The high speed load push-pull 1051 of each attenuation units
The action executing time is not more than 20ms (preferably no more than 10ms).The stroke of push rod 1054 is not less than 3mm (preferably
20mm)., can be by control system according to acquired quilt in the flow of radiation monitoring is carried out to object to be detected such as vehicle
Characteristic information of the detection object in scan channel, optionally send the related attenuation units of order control and perform action,
The attenuation block being pushed out weakens or the transmitted intensity of shielding respective regions, and the single absorbed dose of radiation of respective block is limited
In extremely low scope.
Fig. 8 D are side schematic view, and as in fig. 8d, collimater 104 and attenuating device 130 can be installed within mounting bracket
On 1041.Scanning means can also include switching device 102, and switching device 102 is used to control radiation source 101 to detection zone
The occlusion state of the beam of transmitting.Switching device 102 can be by having the alpha ray shield material of extremely strong damping capacity to ray
Material is made, such as lead, tungsten.Switching device 102 can be by quick tight shut-off or opening ray window, quickly to open
With the beam for closing the guiding detection zone that radiation source 101 is launched.Wherein, switching device 102 when closed can be complete
Stop Radiolucent to security sweep region, during opening, do not stop that any useful beam is launched to detection zone.
3rd, detector
Detector and radiation appliance form radiation imaging apparatus, preferably constitute transmission-type radiation imaging apparatus.Wherein,
Detector can be arranged on top and/or the sidepiece of radiation monitoring passage.
Detector can be multiple, and the test surface of multiple detectors can be with the flying spot beam of scanning means transmitting
The direction of propagation is vertical, and the center line of the test surface of multiple detectors can be substantially in a plane.Wherein, state herein
And center line refer to substantially belong to unidirectional center line in test surface.For example, the test surface of detector is mostly
Rectangle, the center line of rectangle can include the center line of long side and cross the center line of short side, and the test surface of multiple detectors is consolidated
After fixed, the center line in the test surface of multiple detectors can be divided into center line generally in a horizontal direction and approximately along vertical
The center line in direction, the center line of the test surface of multiple detectors refer to substantially in the same direction substantially in a plane
The center line of (horizontal and/or vertical) is substantially in a plane.
4th, information acquisition device
Fig. 2 is returned to, radiation checking system can also alternatively include the information acquisition device 250 in figure shown in dotted line frame.
Information acquisition device 250 can be arranged in radiation monitoring passage at away from detection zone upstream preset distance, be used for
The relative position information between multiple characteristic portions of object to be detected is obtained, multiple characteristic portions are evaded including at least detection
Partial lead and trail edge, control device 240 is according to the relative position information between multiple characteristic portions, it may be determined that detection
Evade the area distribution information of part.
Specifically, control device 240 can obtain the attribute information of object to be detected in advance, and it can be included but not
It is limited to the approximate region distributed intelligence that part is evaded in the detection in object to be detected.So that object to be detected is vehicle as an example, attribute
Information can include but is not limited to license plate number, type of vehicle, vehicle seat quantity, passengers inside the car's distribution situation and other all
Information that such as body color, contour of the vehicle profile, driver identification are identified, driver's face is taken pictures.Thus, filled according to acquisition of information
Put the relative position information between multiple characteristic portions of 250 acquisitions can determine object to be detected elementary contour and/or
Characteristic area distributed intelligence.And part is evaded in the detection that the attribute information that information acquisition device obtains is included in object to be detected
Approximate region distributed intelligence, therefore according to the relative position information between attribute information and multiple characteristic portions, it may be determined that
Accurate area distribution information of the part in object to be detected is evaded in detection.
As shown in Fig. 9 A, Fig. 9 B, so that object to be detected is the vehicle of 5 people's seats as an example, vehicle can be divided into five features
Area, each characteristic area include multiple characteristic portions again.Specifically, fisrt feature area includes vehicle head forefront P1, vehicle head
Contouring flex point P2.Second feature area is included under vehicle front windshield along P3, vehicle left-hand mirror P4, vehicle right rear view mirror
The left A posts P4a of P4 ', vehicle, the right A posts P4a ' of vehicle, on vehicle front windshield along P5.Third feature area includes the left B posts of vehicle
The right B posts P6 ' of P6, vehicle, vehicle roof P7.Fourth feature area includes the left pillar P8 of vehicle, the right B-C post P8 ' of vehicle, rear gear
On wind glass along under P9, rear seat windscreen along P10.It is last that fifth feature area includes tailstock contouring flex point P11, vehicle tail
Along P12.
Further, second feature area, third feature area can further be drawn according to the seat facilities of vehicle again
Point.As shown in Figure 8 B, second feature area can be divided into main driving area A12, copilot area A11, and third feature area can divide
For left side seating area A22, central seat area A20 and right-side seat area A21.Also, in each characteristic area and characteristic area
The lead and trail edge in subcharacter area (such as seat region) can be described by corresponding characteristic portion.Wherein, each seat in vehicle
Dimension information can also refer to national design standard by being analyzed to obtain to multiple characteristic portions《In passenger car
Size GBT13053-2008》.
The attribute information that control device 240 obtains in advance can be the personnel's distribution situation being detected on vehicle, such as only main
There is a people driver's seat.Information acquisition device 250 can be obtained between multiple characteristic portions of the vehicle shown in Fig. 8 A, Fig. 8 B
Relative position information, according to the relative position information between multiple characteristic portions of the vehicle of acquisition, vehicle can be obtained
The distribution of elementary contour and each characteristic area.Thus, it is possible to determine that region A12 is the detection corresponding to main driving seat
Evade part.Wherein, region A12 forward position is characterized position P4 or P4a, and rear edge is characterized position P6.Wherein, on region
A12 size may be referred to national design standard《Car interior dimension GBT13053-2008》, can also be according to feature
Relative position information between position P4, P4a, P6, P6 ' determines.
In the present invention, information acquisition device 250 can use ranging, emission sensor, image analysis technology etc. more
Kind mode obtains the relative position information between multiple characteristic portions of object to be detected.Below with regard to information acquisition device 250
Several possible implementations illustrate.
1st, ranging
In simple terms, can to object to be detected launch flying spot beam, according to receive from object to be detected return
The time difference of signal, it may be determined that the range information at multiple positions on object to be detected, by believing the distance at this multiple position
Breath is analyzed, and can obtain the shape information of object to be detected.The shape of object to be detected is further analyzed, just
The relative position information between representative multiple characteristic portions can be obtained.
When obtaining the relative position information between multiple characteristic portions based on range measurement principle, information acquisition device 250 can
To obtain multiple features of object to be detected using a variety of range units such as laser ranging system, ultrasonic distance-measuring sensor
Relative position information between position.
So that information acquisition device 250 is laser ranging system as an example, laser ranging system can be arranged on radiation monitoring and lead to
The top in road or sidepiece (left side or right side).Laser ranging system according to predetermined frequency cycle can be examined to radiation
Channel scan laser beam is looked into, the direct of travel that the exit direction of laser beam preferably limits with radiation monitoring passage is substantially vertical,
Laser beam is properly termed as laser scanning face along the face that exit direction is formed.Radiation monitoring is arranged in laser ranging system to lead to
During the top in road, laser ranging system can be preferably provided in the surface of radiation monitoring passage, and now laser scanning face exists
Projection on horizontal plane should be able to preferably cover whole radiation monitoring passage in the direction of the width.Set in laser ranging system
In the sidepiece of radiation monitoring passage, standoff height of the laser scanning face on perpendicular, which should be able to preferably be more than, to be detected
The height of object.
For each transmit cycle, laser ranging system can obtain multiple unit angles according to predetermined angular resolution
Distance measurement value corresponding to the laser beam of (angle of minimum resolution) transmitting, to obtain multiple distance measurement values.In object to be detected without laser
During scanning plane, obtained multiple distance measurement values are range information when object is not detected among in radiation monitoring passage.It is being detected
When object passes through laser scanning face, when the multiple distance measurement values obtained under each cycle pass through laser scanning face for object to be detected,
The distance measurement value at multiple positions of the object to be detected on the width in radiation monitoring passage.By under multiple cycles
Distance measurement value is analyzed, and can obtain the elementary contour information of object to be detected, and the base such as type according to object to be detected
This attribute information, it can further analyze to obtain between multiple characteristic portions and the multiple characteristic portions in object to be detected
Relative position information.
When information acquisition device 250 is placed in the top of radiation monitoring passage using laser ranging system, it is contemplated that quilt
Detection object is possible to that width is larger, and the laser beam of a laser ranging system transmitting possibly can not be realized to be detected to whole
The scanning of object.Therefore, information acquisition device can also use two or more platform laser ranging systems.
2nd, emission sensor
Emission sensor is typically made up of the emission part and acceptance division that separate, and emission part and acceptance division can pacify respectively
Mounted in radiation monitoring passage both sides, its measuring principle is emission part transmission signal, and acceptance division is sentenced according to whether receive signal
It is disconnected whether to be blocked between emission part and acceptance division, judge to whether there is object to be detected between emission part and acceptance division with this.
Thus, information acquisition device 250 can use multiple emission sensors or emission sensor array, multiple
Emission sensor or emission part in emission sensor array and acceptance division can be separately positioned on radiation monitoring passage two
Side, the test surfaces of multiple emission sensor or emission sensor arrays can be generally within same planes, and and spoke
Penetrate and check that the direct of travel that passage limits is vertical.Pass through multiple emission sensors or emission sensor in object to be detected
During the test surface of array, according to the signal reception condition of multiple receivers at a time, it may be determined that the moment is positioned at detection
The side portion structure of object to be detected in face, thus when object to be detected passes through test surface completely, it is possible to be detected
Survey the whole side portion structure information of object.Analyzed by counter-lateral quadrents structural information, can further obtain multiple features
Relative position information between position and multiple characteristic portions.
In addition, information acquisition device 250 is when using multiple emission sensors or emission sensor array, it is multiple
Emission sensor or emission part in emission sensor array and acceptance division can also be separately positioned on radiation monitoring passage
Top and bottom.The test surface of multiple emission sensor or emission sensor arrays can be generally within same plane
It is interior and vertical with the direct of travel that radiation monitoring passage limits.Pass through multiple emission sensors or right in object to be detected
When penetrating the test surface of formula sensor array, according to the signal reception condition of multiple receivers at a time, it may be determined that this when
The plan structure of the object to be detected in test surface is carved, thus when object to be detected passes through test surface completely, so that it may
To obtain the whole plan structure information of object to be detected.By analyzing plan structure information, can also further obtain
Relative position information between multiple characteristic portions and multiple characteristic portions.
3rd, image analysis technology
Information acquisition device 250 be also based on image analysis technology obtain object to be detected multiple characteristic portions it
Between relative position information.Specifically, information acquisition device can use imaging sensor, and imaging sensor can be set
In the top of radiation monitoring passage and/or sidepiece.Imaging sensor be used for object to be detected be imaged, can by institute into
Image analyzed, obtain object to be detected multiple characteristic portions and multiple characteristic portions between relative position close
System.Wherein, it is known to those skilled in the art on image analysis technology, repeat no more here.
So far, just the structure of the radiation image-forming system of the present invention elaborates.Below using object to be detected as vehicle
Exemplified by, just the concrete application process of the radiation checking system of the present invention is described further.
Concrete application example
Embodiment one
Referring to Figure 10-Figure 13, wherein Figure 10 is to show to carry out vehicle using the radiation checking system that the present invention is built
Front view during dragging scanning；Figure 10 A are the enlarged diagrams of actuator part in Figure 10；Figure 11 is to show to utilize this
Invent the front view when radiation checking system built to vehicle be driving through scanning；Figure 11 A are actuators in Figure 11
Partial enlarged diagram；Figure 12 is side view；Figure 13 is top view.
Frame 100 can be built on chassis 1001.Frame 100 can include left column frame and right column frame, with
The upper surface of chassis 1001 is vertical.The right and left of the lower end of left column frame and right column frame respectively with chassis 1001 is connected
Connect, upper end is connected with the left and right both sides of crossbeam frame respectively, left column frame, right column frame, crossbeam frame and chassis
1001 4 form the passage of hollow, pass through for scanned vehicle.
The head and the tail both sides on chassis 1001 can be connected with upstream side flat slope platform 1092 and downstream flat slope platform 1093 respectively
Connect, the upper surface of the upper surface of chassis 1001 and upstream and downstream side flat slope platform is in same level.The He of upstream side flat slope platform 1092
Downstream flat slope platform 1093 can be above the ground level, upstream side flat slope platform 1092 and downstream flat slope platform 1093 and ground connecting portion
Point a upstream side ramp 1091 and downstream ramp 1094 can be set respectively, stably enter in order to vehicle and
Leave radiation monitoring passage.Upstream side ramp 1091, upstream side flat slope platform 1092, chassis 1001 and frame 100, downstream
Flat slope platform 1093 and downstream ramp 1094 form whole radiation monitoring passage.
Chassis 1001 is the carrying basis of complete equipment, and its levels of planarity can be adjusted flexibly, can pacify in chassis 1001
Fill radiation appliance and actuator.Wherein, the seam of one fixed width is left on chassis corresponding to radiation appliance surface, for radiation
The flying spot beam of device transmitting passes through.
As illustrated, radiation appliance can include radiographic source 101, shutter 102, beam shielded enclosure 103, ray collimator
104 and damping mechanism 105.
Radiographic source 101 can use 160kV~450kV X-ray machine, or 1MeV~3MeV betatron
Betatron, the subtended angle of the divergent-ray beam of radiographic source 101 are sufficiently large (X-ray machine is not less than 90 °), can be fixed on ray screen
Cover inside room 103.
Shutter 102 can use, and there is extremely strong damping capacity radiation shielding material to be made to ray, such as lead, tungsten etc..
Can it is quickly tight shut-off or open ray window, for quickly open and close be oriented to scan channel ray.Shutter
102 can stop that Radiolucent to security sweep region, when shutter 102 is opened, does not stop any useful ray completely when closing
Launch to detection zone.
The structure of beam shielded enclosure 103 can be designed to labyrinth-like, be enclosed in the surrounding of radiographic source 101, face collimater
The slit of one fixed width is left on a 104 Room face, radiographic source 101 can be can adjust with multiple frees degree.
Ray collimator 104 mainly can be made up of the alloy of lead material or lead-containing materials, pass through line therebetween
Seam, the ray that radiographic source is launched, is shaped to the fladellum ray surface for being approximately perpendicular to direction of traffic.The width of line seam
Can be adjustable between 0~10mm.
Damping mechanism 105 is preferably mounted in collimater 104, and the radiation exit of the line seam in collimater 104
Side, the transmitted intensity of scanned vehicle special area position is filtered and weakened for fast selective, ensures that its region unit is shone
The single absorbed dose of radiation penetrated is in ultralow scope.
Damping mechanism 105 can be the attenuating device addressed above.In the present embodiment, damping mechanism 105 can design
Into multiple levels, the attenuation units of each level are preferably designed so that word order shape, are also designed to circular shape row
Row, attenuation units array are arranged on bottom plate.For example, individual layer attenuation units can be made up of each and every one more attenuation units, each decline
High speed load push-pull (preferably high-speed electro-magnet), attenuation block can be included by subtracting unit.Each attenuation units can refer in controller
The lower self contained function of order, push rod promote attenuation block quick-expansion, and the ray of corresponding block, attenuation block contracting are filtered when attenuation block is stretched out
Cancel ray filtering when returning.The action executing time of the high speed load push-pull of each attenuation units is (preferable little no more than 20ms
In 10ms).Flexible stroke is not less than 3mm (preferably 20mm).
Detector 106 may be mounted in detector cavity 107, and the sensitive zone centerline of all detectors can be preferred
Ground is on one face.Wherein, detector cavity 107 can be divided into the inside that is fixed on left column frame and right column frame
Left detector cavity, right detector cavity and the top detector cavity being mounted above in crossbeam frame.Left detector cavity
Detector 106 can be provided with body, right detector cavity and top detector cavity.Detector cavity can carry out a left side
Multiple frees degree such as right, front and rear, lifting, pitching, rotation are adjusted flexibly, in order to which the fan-ray beam after collimation can make
The output of detector reaches maximum.
Radiation protection wall 108 can be divided into left radiation protection wall and right radiation protection wall, and connection respectively is arranged on left column
The outside of support and right column support, to shield unnecessary ray.
The actuator 113 set in chassis 1001 can be chain drive.As shown in figure 9, utilizing dragging dress
When putting 113 dragging vehicles and being detected, the push roller on actuator 113 can be higher than upper surface (the i.e. radiation inspection on chassis 1001
Look into the upper base surface of passage), as shown in figure 11, when being detected by driver driving vehicle, actuator 113 can be complete
Portion is accommodated in chassis 1001, to ensure that vehicle being capable of normally travel.
The main body of actuator 113 can be steel design, to ensure having enough intensity and corrosion resistance, drag
Device 113 may be mounted in the ground on the direct of travel of radiation monitoring passage restriction or in ramp.Actuator 113 can
With including delivery track 1130, the first push roller 11311, the second push roller 11312, conveyor support 1132, drive device
1133rd, driving-chain 1134, tensioning apparatus 1135, first position sensor 11361, second place sensor 11362, the 3rd
Put sensor 11363, the 4th position sensor 11364, wheel orientating device 1137, anti-derailed side block device 1138, parking limit
Position device 1139, turnover panel 1140, local operation button box 1141 and control system (not shown).Wherein, filled on dragging
The specific part for putting 113 may refer to associated description above, and here is omitted.Here the part only do not mentioned for the above and
Content is described briefly.
As shown in Figure 10 A, Figure 11 A, anti-derailed side block device 1138 can be designed to liftable structure, such as anti-derailed
Side block device 1138 can be made up of lever and elastomeric element (such as spring).When vehicle is passed through by actuator dragging, prevent
Trackside blocking means 1138 can rise, higher than delivery track 1130, to prevent the wheel of vehicle from deviateing delivery track 1130,
Vehicle drive by when, anti-derailed side block device 1138 can decline, and less than delivery track 1130, not influence the normal of vehicle
Traveling.
Conveyor support 1132 is used to support conveying mechanism, can be reinforced steel structure.According to actual conditions,
It can be arranged in ramp and be arranged on ground, also in the groove of subsurface.In conveyor support 1132 with radiation appliance pair
The sealing of one fixed width can be left on the rack beam for the part answered, so that the beam after the shaping of collimator 104 leads to
Cross.
Tensioning apparatus 1135 is used for the elastic dynamics for adjusting chain, and wheel orientating device 1137 is used to enter wheel correcting
Delivery track.
The controller (not indicated in figure) of actuator can be electric-control system, and it can include switch board, control CPU/
PLC, frequency converter etc..
Be provided with local operation button box 1141 indicator lamp, " local/remote " selecting switch, " jerk " key switch,
" on schedule ", the button such as " antipoints ", " RUN ", " upload/ready "；For locally debugging and operating dragging system, and work as quilt
Check that vehicle parking is in place, after driver and passenger gets off and reaches safety zone, operating personnel press " upload/ready "
Button, remote control room operator can carry out vehicle scan flow.
The exit of the porch and downstream of swimming side on the inspection system is respectively equipped with entrance pin 1111 and exit catch
Bar 1112.Entrance pin 1111 is used to prompt scanning process and limitation into the magnitude of traffic flow of scan channel, Constraint Violation vehicle
Entrance etc.；Outlet pin 1112 is used for the clearance for limiting wagon flow and vehicle.Guardrail 611 is used as radiation protection area safety zone
Border guardrail, avoids unrelated person from illegally entering.Ladder 612 can facilitate related personnel's ramp up and down.
Scanning process under the embodiment of the present invention is as follows：
1) equipment starts.
2) system electrification initialization, self-test, system is default conditions.Radiographic source 101, which is in, stops emission lines state, or
Person's radiographic source 101 is in emission lines but shutter 102 is closed.All attenuation units are in retracted mode, beam
It is not attenuated block to block, empties scan channel.
3) scan pattern selects, and system default is input mode.
4) main operational steps are under input mode：
A. vehicle to be scanned is allowed to enter scan channel according to traffic signals prompting, wheel orientating device 1137 leads wheel
Just enter delivery track 1130；
B. the 3rd position sensor 11363 is left on edge after front-wheel, it is ensured that front-wheel can not be pressed on turnover panel 1140, before front-wheel
Along no more than parking limiter 1139；
C. driver is in order by vehicle according to indicating：Steering wheel beat just, hang neutral, RELEASE PARKINGBRAKE etc.；
D. driver and passengers inside the car get off, and leave scan channel from the position of ladder 612, the pavement behind guardrail 611
Walk to the wait of the position of outlet side ladder 612；
E. confirm it is ready after, pilot presses " upload/ready " button on local operation button box 1141；
F. after control room operator " confirmation ", dragging system is started, the first push roller 11311 is since the lower section of turnover panel 1140
Start, vehicle is delivered to outlet side from entrance side, while can obtain vehicle position by information detecting unit (not shown)
Confidence ceases；
G. vehicle position information can be sent to control system by information detecting unit, and control system can be according to reception
The signal arrived carries out integrated treatment, and carries out abnormal judgement (such as speed is too low), if there is abnormal, direct interrupt scanning, knot
Line journey；If normal, step is continued with；
H. control system normally controls radiographic source to send out/stop ray, detector and other systems part, and vehicle is implemented to sweep
Retouch flow；
I. start to reduce speed when the first push roller 11311 is walked to four position sensors 11364, automobile low-speed is pushed away
In to anti-slip spacing zone, when the walking of the first push roller 11311 is at second place sensor 11362, dragging system stops；
J. inspector checks that image decides whether to let pass, it is determined that after letting pass, driver, which gets on the bus, to be driven to sail out of passage, and the car is swept
Retouch end；Into the scanning of next vehicle.
K. terminate.
5) key step being driving through under pattern is as follows：
A. vehicle to be scanned is allowed to enter scan channel according to traffic signals prompting, wheel orientating device 1137 leads wheel
Just enter delivery track 1130；
B. prevent that derailed side block device 1138, parking limiter 1139 drop to its top and held with the face of delivery track 1130
It is flat；
C. the ready instruction of waiting system；
D. after system is ready, indicated according to traffic signals, it is allowed to which driver driving vehicle enters scan channel, and wheel is led
Wheel correcting is entered delivery track 1130 by positive device 1137；
E. driver drives to move on, and information unit obtains vehicle location state, information, and sends to control system
Row integrated treatment, and carry out abnormal judgement.If there is abnormal, direct interrupt scanning, end flow；If normal, continue to hold
Row following steps；
When F. passing through detection zone in the front end of vehicle, control radiographic source 101 starts to launch flying spot beam, or control
Shutter 102 processed is opened so that the flying spot beam that radiographic source 101 is launched can be incident normally to detection zone.
When the detection on vehicle evades part (i.e. personnel region) and passes through detection zone, attenuating device pair is controlled
What radiographic source 101 was launched evade the corresponding flying spot Shu Jinhang in part with detection decays, and evading part in detection passes fully through
During detection zone, control attenuating device stops decay.When leaving detection zone in the end of vehicle, control radiographic source 101 stops
Divergent-ray beam, or control shutter 102 are closed, to block the beam of the transmitting of radiographic source 101.
G. inspector checks that image decides whether to let pass, it is determined that after letting pass, driver, which gets on the bus, to be driven to sail out of passage, and the car is swept
Retouch end；Into the scanning of next vehicle.
H. terminate.
Embodiment two
Referring to Figure 14-Figure 17, wherein Figure 14 is to show to carry out vehicle using the radiation checking system that the present invention is built
Front view during dragging scanning；Figure 15 is to show that vehicle drive using the radiation checking system that the present invention is built to lead to
Front view during overscanning；Figure 16 is side view；Figure 17 is top view.
Unlike embodiment one, the radiation checking system under the present embodiment uses bilateral actuator, that is, is radiating
Check that the both sides of passage respectively set an actuator.Also, actuator is to use carrier bar/flat board actuator.Below only
Difference is illustrated, associated description above is may refer to for same section.
As illustrated, the first actuator 213 and the second actuator 214 are unistage type flat board/chain-plate type conveying dresses
Put structure, the both sides in radiation monitoring passage, be respectively used to carry and drag be examined vehicle both sides wheel,
During transport vehicles, the first actuator 213 keeps speed consistent with the second actuator 214.Wherein, the first actuator 213
Can share a motor with the second actuator 214, between be connected with power transmission shaft, can also use two driving
Motor, the actuator on both sides is driven respectively.When not dragging vehicle or system is switched to when being driving through pattern, first drags
The dynamic actuator 214 of device 213 and second is in stopping and on-position, is driven in order to be examined vehicle from flat board/carrier bar
Sail by being scanned.
First conveyor support 2132 and the second conveyor support 2142 are used to support conveying mechanism, can be to add
Strong type steel design.According to actual conditions, the first conveyor support 2132 and the second conveyor support 2142 can be arranged on
It can be arranged in ramp on ground, also in the groove of subsurface.First conveyor support 2132 and the second conveyor support
The sealing of one fixed width can be left in 2142 on the rack beam of part corresponding with radiation appliance, for collimator 104
Beam after shaping passes through.
First driving means 2133 can provide stronger driving force, drive the first drive link 2134 and the second driving-chain
Plate 2144 moves, and to convey examined vehicle, it can be motor and speed reducer or hydraulic motor and reductor etc..
Synchronous Transmission axle 2143 preferably selects Synchronous Transmission axle, for transmitting power caused by first driving means 2133,
To drive the second drive link 2144, and keep the speed sync with the first drive link 2134.Alternatively, can also set
Second drive device, it can be motor and speed reducer or hydraulic motor and reductor etc..
First drive link 2134 and the second drive link 2144 are used to carry wheel and car body, in vehicle input mode
Under, vehicle can be transported to outlet side from entrance side.
First tensioning apparatus 2135 and the second tensioning apparatus 2145 are used for the elastic dynamics of adjustable plate chain.
The basic phase of process of scanning process and embodiment one under the embodiment of the present invention, here is omitted, difference
It is, under input mode, therefore, to assure that all wheels of vehicle all fall in drive link.
The radiation checking system according to the present invention above is described in detail by reference to accompanying drawing.
It is described above various embodiments of the present invention, described above is exemplary, and non-exclusive, and
It is also not necessarily limited to disclosed each embodiment.In the case of without departing from the scope and spirit of illustrated each embodiment, for this
Many modifications and changes will be apparent from for the those of ordinary skill of technical field.The selection of term used herein,
It is intended to best explain the principle, practical application or the improvement to the technology in market of each embodiment, or makes the art
Other those of ordinary skill be understood that each embodiment disclosed herein.
Claims (11)
1. a kind of radiation checking system, the object to be detected for being advanced to the direct of travel limited along radiation monitoring passage enters
Row radiation monitoring, the system include：
Radiation appliance, the bottom of the radiation monitoring passage is arranged on, for launching flying spot beam to detection zone；
One or more detectors, top and/or the sidepiece of the radiation monitoring passage are arranged on, for receiving from the detection
The imaging ray beam of object to be detected transmission or scattering in region；
Actuator, it is arranged on the side or two on the width of the direct of travel in the radiation monitoring passage
Side, the upper surface of the upper surface of the actuator and the bottom of the radiation monitoring passage are remained basically stable, described for dragging
Object to be detected is advanced along the direct of travel；And
Control device, pass through the situation of the radiation monitoring passage under driving effect of the object to be detected at its own
Under, control the radiation appliance to launch flying spot beam to the detection zone with the first mode of operation, in the detected material
Body under the dragging effect of the actuator by the radiation monitoring passage in the case of, control the radiation appliance with the
Two mode of operations launch flying spot beam to the detection zone.
2. radiation checking system according to claim 1, wherein, the actuator includes：Closed loop transport mechanism, it is described
The upper surface of the upper surface of closed loop transport mechanism and the bottom of the radiation monitoring passage is remained basically stable, the closed loop transport mechanism
Upper surface direction of transfer and the direct of travel it is basically identical.
3. radiation checking system according to claim 2, wherein, at least one push away is provided with the closed loop transport mechanism
Roller, the push roller promote the object to be detected to be advanced along the direct of travel under the driving of the closed loop transport mechanism.
4. radiation checking system according to claim 3, wherein, the closed loop transport mechanism includes：
Drive device, for providing driving force；
Closed loop conveyer chain, the push roller are arranged on the closed loop conveyer chain, under the driving effect of the drive device,
The push roller is driven to be moved along the direction of transfer, wherein, it is moved to the upper surface of the closed loop conveyer chain in the push roller
When, the push roller is higher than the upper base surface of the radiation monitoring passage.
5. radiation checking system according to claim 3, in addition to：Turnover panel, it is movably disposed in the closed loop transmission
Between the original position and radiation monitoring passage of mechanism upstream side,
It is described to push away after the trailer portion of the object to be detected is moved in the closed loop transport mechanism along the turnover panel
Roller boosts the turnover panel under the driving of the closed loop transport mechanism, and is moved to the upper surface of the closed loop transport mechanism.
6. radiation checking system according to claim 2, in addition to：
One or more sensors, it is separately positioned on original position and/or the downstream of the upstream side of the closed loop transport mechanism
End position, for detecting information at the time of the object to be detected passes through the original position and/or end position.
7. radiation checking system according to claim 2, in addition to：
Stopping means, it is arranged between the end position in the downstream of the closed loop transport mechanism and the radiation monitoring passage,
For when the closed loop transport mechanism terminating the dragging to the object to be detected, the object to be detected being limited into one and consolidated
Positioning is put.
8. radiation checking system according to claim 1, wherein, the radiation appliance includes：
Scanning means, for launching flying spot beam to detection zone；And
Attenuating device, has a multiple-working mode, and the attenuating device is launched the scanning means under different working modes
The intensity of the flying spot beam of different piece is decayed.
9. radiation checking system according to claim 8, wherein, the object to be detected includes part to be detected and detection
Evade part,
In this first operative mode, process of the part Jing Guo the detection zone is evaded in the detection of the object to be detected
In, the intensity for evading the corresponding flying spot beam in part with the detection that the attenuating device is launched the scanning means is entered
Row decay, predetermined threshold value is less than with the absorbed dose rate for causing the detection to evade part,
Under second mode of operation, the attenuating device does not enter to the intensity of the flying spot beam of scanning means transmitting
Row decay.
10. radiation checking system according to claim 8, wherein, the attenuating device includes multiple attenuation units, different
The intensity that attenuation units are used for the flying spot beam of the different piece to scanning means transmitting decays,
The control device evades the area distribution information of part according to the detection, determines the detection rule of the object to be detected
When keeping away the forward position arrival detection zone of part, the attenuation units of work are participated in the attenuating device.
11. radiation checking system according to claim 1, in addition to：
Information acquisition device, it is arranged in the radiation monitoring passage at away from detection zone upstream preset distance, for obtaining
The relative position information between multiple characteristic portions of the object to be detected is taken, the multiple characteristic portion comprises at least described
The lead and trail edge of part is evaded in detection,
The control device determines that part is evaded in the detection according to the relative position information between the multiple characteristic portion
Area distribution information.
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| WO2021259327A1 (en) * | 2020-06-23 | 2021-12-30 | 同方威视技术股份有限公司 | Movable inspection device and inspection method |
| WO2022088547A1 (en) * | 2021-02-04 | 2022-05-05 | South University Of Science And Technology Of China. | Method and apparatus for characterising object |
| CN115753850A (en) * | 2022-11-30 | 2023-03-07 | 清华大学 | CT detection system, method and device |
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Effective date of registration: 20220124 Address after: 030199 East Building 3005a, Guanlan international building, Jinyi street, Huangzhai Town, Yangqu County, Taiyuan City, Shanxi Province Patentee after: Zhongtai Yuanke Co.,Ltd. Address before: 100088 No.103, building 12, No.8, xinjiekouwai street, Xicheng District, Beijing Patentee before: POWERSCAN Co.,Ltd. |