CN107664774A - radiation checking system and method - Google Patents
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- CN107664774A CN107664774A CN201710846495.3A CN201710846495A CN107664774A CN 107664774 A CN107664774 A CN 107664774A CN 201710846495 A CN201710846495 A CN 201710846495A CN 107664774 A CN107664774 A CN 107664774A
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- G01V5/22—
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
Abstract
The invention discloses a kind of radiation checking system and method.The attribute information of object to be detected is obtained, the approximate region distributed intelligence of part is evaded in the detection that attribute information is included in object to be detected；The relative position information between multiple characteristic portions of object to be detected is obtained, multiple characteristic portions comprise at least the lead and trail edge that part is evaded in detection；According to the relative position information between attribute information and multiple characteristic portions, it is determined that the accurate area distribution information of part is evaded in detection.Thus, it is possible to accurate area distribution information of the part in object to be detected is evaded in accurate quick determination detection.
Description
Technical field
The present invention relates to radiation monitoring field, more particularly to a kind of radiation checking system and method.
Background technology
Vehicle inspection system based on radiation detection imaging technique is widely used in the logistics such as customs, airport, harbour, station
The national important place such as place and municipal building.Application purpose is also progressively looked into from the danger of searching for dangerous goods of van container vehicle, smuggled
Check, be expanded to the anti-terrorism safety check of middle-size and small-size passenger vehicle or even human body.Wherein, to the safety check system of passenger vehicle, divide
For dragging conveying scan mode and it is driving through scan mode.
In the case where vehicle conveys scan pattern, when examined vehicle reaches ad-hoc location, driver and passenger need to get off, and take charge of
Machine need to carry out before getting off many more manipulations (e.g., steering wheel for vehicle beat just, extension neutral, RELEASE PARKINGBRAKE, some cars can't stop working),
Then by conveying device by vehicle to be scanned from radiation monitoring feeder connection while be transported to outlet while, when being scanned through region, car
When being transported to particular detection position, control system control radiographic source sends ray scanning vehicle.It can be seen that dragging conveying radiation
Scan pattern, the dragging induction system of complexity need to be arranged, floor space is big, and speed is limited, checks that efficiency is low, equipment is complicated, into
This height, induction system fault rate is high, maintenance difficulties are big, is not easy transition use.
On the other hand, surge and safety check pressure in face of the rapid growth of various countries' passenger vehicle, the vehicle flowrate of each application places
Power increased dramatically, and if continuing to get off using the driver and personnel that are examined vehicle, enter pedestrian by actuator transport vehicles
The pattern of car separation scanning, has a strong impact on safety check efficiency, can have opportunity to terrorist.
Therefore, the scan mode for being driving through formula is increasingly becoming the first choice of field of vehicle detection.At present, for being driving through
Goods/vehicle inspection system of formula, be nearly all by the way of switching workload or close rate respectively to driver's cabin and
Container part is scanned.When sensor detects that vehicle headstock part enters scanning area ad-hoc location, control system control
The ray scanning headstock of radiographic source transmitting low dose rate processed, when sensor detects that container part enters scanning area ad-hoc location
When, the ray scanning vehicular container part of control system control radiographic source transmitting high dose rate.Vehicle for being driving through formula
For detecting system, how accurately to determine that part is evaded in the detection in vehicle is current urgent problem.
The content of the invention
It is a primary object of the present invention to provide a kind of can accurately determine that part is evaded in the detection in object to be detected
Radiation checking system and method.
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, including：First information acquisition device, is arranged on radiation monitoring
The upstream of passage, for obtaining the attribute information of object to be detected, portion is evaded in the detection that attribute information is included in object to be detected
The approximate region distributed intelligence divided；Second information acquisition device, between multiple characteristic portions for obtaining object to be detected
Relative position information, multiple characteristic portions comprise at least the lead and trail edge that part is evaded in detection；Processor, for according to attribute
Relative position information between information and multiple characteristic portions, it is determined that the accurate area distribution information of part is evaded in detection.
Preferably, the radiation checking system can also include：3rd information acquisition device, for obtaining detected material body phase
For the position offset information in the centre position of radiation monitoring passage, processor evades the accurate area distribution of part according to detection
Information and position offset information, it is determined that when detection evades part and enters detection zone, region is evaded in the detection in detection zone.
Preferably, the radiation checking system can also include：Scanning means, the radiation inspection being arranged in radiation monitoring passage
Opening position is looked into, for launching flying spot beam to detection zone；One or more detectors, it is arranged in radiation monitoring passage
Precalculated position, for receiving from the object to be detected transmission in detection zone or the imaging ray beam of scattering；At least one layer decay
Device, the intensity of the flying spot beam for launching scanning means decay, and processor is additionally operable to determine scanning means hair
Targeted scans beam corresponding to region is evaded in the flying spot Shu Zhongyu detections penetrated, and evades part in detection and pass through detection zone
During domain, at least one layer of attenuating device is controlled to decay the intensity of targeted scans beam, to cause detection to evade
Partial absorbed dose rate is less than predetermined threshold value.
Preferably, the radiation checking system can also include：Information detector, before evading part for detection detection
Along the second moment for reaching the first moment of radiation monitoring position, detecting the rear edge arrival radiation monitoring position for evading part, and
The first detection signal for including for the first moment is sent respectively, and the second detection signal comprising the second moment, processor is additionally operable to connect
First detection signal and the second detection signal are received, and controls attenuating device to start at the first moment to the strong of targeted scans beam
Degree is decayed, and control attenuating device stops decaying to the intensity of targeted scans beam at the second moment.
Preferably, the second information acquisition device is laser ranging system, is arranged on top or the sidepiece of radiation monitoring passage,
For being limited according to predetermined frequency to radiation monitoring channel emission laser beam, exit direction and the radiation monitoring passage of laser beam
Direct of travel it is substantially vertical, for each transmit cycle, laser ranging system obtains each angle according to predetermined angular resolution
Distance measurement value corresponding to the laser beam of degree, to obtain multiple distance measurement values, by being carried out to all distance measurement values under multiple transmit cycles
Analysis, obtains the relative position information between multiple characteristic portions.
Preferably, the second information acquisition device can include：Imaging sensor, it is arranged on the top of radiation monitoring passage
And/or sidepiece, for being imaged to object to be detected；Image analysis apparatus, for formed graphical analysis, to obtain multiple spies
Levy the relative position information between position.
Preferably, the second information acquisition device can include：Emission sensor, including multiple one-to-one emission parts
And acceptance division, the both sides of radiation monitoring passage are separately positioned on, each emission part, which is used to launch to its corresponding acceptance division, to be made a reservation for
Signal；Signal analysis device, for the signal reception condition according to multiple acceptance divisions, determine the phase between multiple characteristic portions
To positional information.
Preferably, the radiation checking system can also include：Guider, for guiding object to be detected to be examined along radiation
Advance in the centre position looked on the direct of travel of passage restriction.
According to another aspect of the present invention, a kind of radiation testing method is additionally provided, for leading to along radiation monitoring
The object to be detected that the direct of travel that road limits is advanced carries out radiation monitoring, and this method includes：Obtain the attribute of object to be detected
The approximate region distributed intelligence of part is evaded in information, the detection that attribute information is included in object to be detected；Obtain object to be detected
Multiple characteristic portions between relative position information, multiple characteristic portions comprise at least detection evade part forward position and after
Edge；According to the relative position information between attribute information and multiple characteristic portions, it is determined that the accurate region point of part is evaded in detection
Cloth information.
Preferably, the radiation testing method can also include：Object to be detected is obtained relative in radiation monitoring passage
Between position position offset information；Evade the accurate area distribution information and position offset information of part according to detection, it is determined that inspection
When gauge keeps away part and enters detection zone, region is evaded in the detection in detection zone.
Preferably, during object to be detected is by detection zone, swept using scanning means to detection zone transmitting
Beam is retouched, to realize the detection to object to be detected, this method can also include：Determine the flying spot of scanning means transmitting
Targeted scans beam corresponding to region is evaded in Shu Zhongyu detections；During detection evades part by detection zone, make
The intensity of targeted scans beam is decayed with default attenuating device, to cause detection to evade the absorbed dose rate of part
Less than predetermined threshold value.
Preferably, the radiation testing method can also include：Guiding object to be detected limits along radiation monitoring passage
Advance in centre position on direct of travel.
To sum up, radiation checking system of the invention and method, can obtain has generation on object to be detected (such as vehicle)
Relative position information between multiple characteristic portions of table, by dividing the relative position information between this multiple position
Analysis, can sketch the contours of the elementary contour of object to be detected and one or more of characteristic areas.In this way, according to detected material
The substantially distribution situation of part is evaded in detection in body, it is possible to it is determined that accurate area of the part in object to be detected is evaded in detection
Domain distributed intelligence.
Brief description of the drawings
Disclosure illustrative embodiments are described in more detail in conjunction with the accompanying drawings, the disclosure above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein, in disclosure illustrative embodiments, identical reference number
Typically represent same parts.
Fig. 1 is the indicative flowchart for showing radiation testing method according to an embodiment of the invention.
Fig. 2A, Fig. 2 B are the dividing mode schematic diagrames for showing characteristic portion when object to be detected is vehicle.
Fig. 3 is the schematic block diagram for the structure for showing radiation checking system according to an embodiment of the invention.
Fig. 4 is the schematic block diagram for the structure for showing radiation checking system according to another embodiment of the present invention.
Fig. 5 A- Fig. 5 C are several working state schematic representations for showing attenuating device.
Fig. 6, Fig. 7 are the structural representations for showing single attenuation units.
Fig. 8 A- Fig. 8 D are the structural representations for showing the attenuating device under another specific embodiment.
Fig. 9 is the structural representation for showing the radiation checking system built using the present invention.
Embodiment
The preferred embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing
Preferred embodiment, however, it is to be appreciated that may be realized in various forms the disclosure without the embodiment party that should be illustrated here
Formula is limited.On the contrary, these embodiments are provided so that the disclosure is more thorough and complete, and can be by the disclosure
Scope is intactly communicated to those skilled in the art.
Before describing the present invention, just some concepts of the present invention are described briefly first.
If it will be understood to those skilled in the art that do not clearly state, the connection described in the disclosure, it is illustrated that in indicate
Connection, can be directly connected to be indirectly connected with by other equipment, device, medium etc..
The object to be detected that the present invention addresses can include part to be detected and part is evaded in detection, and part to be detected is quilt
The part of flying spot Shu Jinhang radiation monitorings is needed to use in detection object, part is evaded in detection can refer to object to be detected
On be not suitable for part using stronger flying spot Shu Jinhang radiation monitorings.For example, object to be detected can be vehicle, such as may be used
To be the freight carrying type vehicles such as truck, trailer, loading train, now, part to be detected is goods loading station, and part is evaded in detection
Such as can be driver's cabin, copilot region for personnel region in vehicle.
The radiation monitoring passage that the present invention addresses can be the passages such as highway, the track for driving through vehicle, can also
It is to carry out the designated lane that radiation detection is set.Radiation monitoring passage preferably can be half-duplex channel, and its direct of travel is only
One determines.Herein, for the front and rear sides of any one position A on radiation monitoring passage, setting vehicle is in edge traveling side
It is referred to as position A upstream side in the side first passed through to during traveling, is referred to as position A downstream in the rear side passed through.Therefore,
For the radiation monitoring position on radiation monitoring passage, vehicle is first passing through the upstream of radiation monitoring position on direct of travel
Side, in the rear downstream that position is looked into by radiation.
When carrying out radiation scanning by the vehicle of formula to driver driving, it is necessary to driver's cabin and other personnel regions
(such as copilot, back row seat) carries out evading detection.How accurately to determine that region is evaded in the detection in vehicle where personnel, with
Just detection can be avoided when carrying out radiation scanning to vehicle and evade region, be the subject matter faced at present.
The present invention proposes, can obtain between multiple characteristic portions representative on object to be detected (such as vehicle)
Relative position information, by analyzing the relative position information between this multiple position, detected material can be sketched the contours of
The elementary contour of body and one or more of characteristic areas.In this way, part is evaded in the detection in object to be detected
Substantially distribution situation, it is possible to it is determined that accurate area distribution information of the part in object to be detected is evaded in detection.
As shown in Fig. 2A, Fig. 2 B, so that object to be detected is dilly as an example, vehicle can be divided into five characteristic areas, often
Individual characteristic area includes multiple characteristic portions again.Specifically, fisrt feature area includes vehicle head forefront P1, vehicle contouring head
Flex point P2.Second feature area is included under vehicle front windshield along P3, vehicle left-hand mirror P4, vehicle right rear view mirror P4 ', vehicle
Left A posts P4a, the right A posts P4a ' of vehicle, on vehicle front windshield along P5.Third feature area includes the left B posts P6 of vehicle, the right B of vehicle
Post P6 ', vehicle roof P7.Fourth feature area includes edge on the left pillar P8 of vehicle, the right B-C post P8 ' of vehicle, rear seat windscreen
Along P10 under P9, rear seat windscreen.Fifth feature area includes tailstock contouring flex point P11, vehicle tail finally along P12.
Further, second feature area, third feature area can further divide according to the seat facilities of vehicle again.
As shown in Figure 2 B, second feature area can be divided into main driving area A12, copilot area A11, and third feature area can be divided into a left side
Side seating area A22, central seat area A20 and right-side seat area A21.Also, the son in each characteristic area and characteristic area is special
The lead and trail edge of sign area (such as seat region) can be described by corresponding characteristic portion.Wherein, in vehicle each seat size
Information can also refer to national design standard by being analyzed to obtain to multiple characteristic portions《Car interior dimension
GBT13053-2008》。
Based on the design of the present invention, the relative position information between the features described above position of vehicle can be obtained, by right
Relative position information between the features described above position of acquisition is analyzed, and can obtain the elementary contour of vehicle and each spy
Levy area distribution information of the area in vehicle.In this way, the substantially distribution situation according to personnel in vehicle, it is possible to quickly determine car
Need to carry out the accurate area distribution information that part is evaded in the detection for evading detection in.For example, the only main driving seat in vehicle
, can be according to the left A posts P4a of vehicle left-hand mirror P4, vehicle of acquisition, the left B posts P6 of vehicle phase in the case that position has personnel
To positional information, left-hand drive room is determined along the length on the bearing of trend of car body, according to the left B posts P6 of vehicle and the right B posts of vehicle
Relative position information between P6 ', it may be determined that the width (half of distance between P6 and P6 ') of main driving room.Thus, it is possible to
Determine to need to carry out detecting accurate area distribution information of the main driving room evaded in vehicle on vehicle.
Determine that the accurate area distribution information of part is evaded in the detection in object to be detected with reference to specific embodiment
Specific implementation process be described in further details.
Fig. 1 is to show that accurate area of the part in object to be detected is evaded in determination detection according to an embodiment of the invention
The indicative flowchart of the method for domain distributed intelligence.
Referring to Fig. 1, method starts from step S110, obtains the attribute information of object to be detected.
Attribute information is the base attribute information related to object to be detected, and it can include but is not limited to object to be detected
In detection evade the approximate region distributed intelligence of part.By object to be detected be vehicle exemplified by, attribute information can include but
It is not limited to license plate number, type of vehicle, vehicle seat quantity, passengers inside the car's distribution situation and other such as body colors, vehicle
The information such as appearance profile, driver identification are identified, driver's face is taken pictures.
The operation for obtaining attribute information can be obtained automatically by machine, can also manually be obtained.Such as photoelectricity can be used
Switch and its array, grating, light curtain, visual pattern and the automatic recognition of speech, microwave, radar, ultrasound, infrared, laser scanning, magnetic
Polytype sensors such as field sensing obtain the attribute information of object to be detected.Can also be by security staff or other relevant peoples
Member by handheld touch-screen provide man-machine interface input attribute information, or can also by installed in mobile terminal (such as
Mobile phone) on app input attribute informations, it can in addition contain be obtained by way of artificial speech, a variety of be manually entered such as take pictures
Attribute information.
In step S120, the relative position information between multiple characteristic portions of object to be detected is obtained.
Multiple characteristic portions can be some positions representative on object to be detected, such as can be detected material
The set of the characteristic portion such as interface of different zones in the marginal position of body, object to be detected.Preferably, multiple features
Position can comprise at least the lead and trail edge that part is evaded in detection.
In the present invention, the relative position between multiple characteristic portions of object to be detected can be obtained in several ways
Information.Such as detected material can be obtained by various ways such as laser distance measuring principle, emission sensor, image analysis technologies
Relative position information between multiple characteristic portions of body.Wherein, concrete implementation mode will elaborate below, herein
It wouldn't repeat.
In step S130, according to the relative position information between attribute information and multiple characteristic portions, evade it is determined that detecting
Partial accurate area distribution information.
Elementary contour and/or the spy of object to be detected can be determined according to the relative position information between multiple characteristic portions
Levy area distribution information.And the attribute information obtained based on step S110 is included the detection in object to be detected and evades the big of part
Area distribution information is caused, therefore according to the relative position information between attribute information and multiple characteristic portions, it may be determined that detection
Evade accurate area distribution information of the part in object to be detected.
As shown in Fig. 2A, Fig. 2 B, so that object to be detected is the vehicle of 5 people's seats as an example, acquired attribute information can be
There is a people at the personnel's distribution situation being detected on vehicle, such as only main driving seat.The vehicle shown in Fig. 2A, Fig. 2 B can be obtained
Relative position information between multiple characteristic portions, believed according to the relative position between multiple characteristic portions of the vehicle of acquisition
Breath, can obtain the distribution of the elementary contour and each characteristic area of vehicle.Thus, it is possible to determine region A12 be corresponding to
Part is evaded in the detection at main driving seat.Wherein, region A12 forward position is characterized position P4 or P4a, and rear edge is characterized position
P6.Wherein, the size on region A12 may be referred to national design standard《Car interior dimension GBT13053-2008》,
It can also be determined according to the relative position information between characteristic portion P4, P4a, P6, P6 '.
After the accurate area distribution information of part is evaded in detection on object to be detected is determined, in object to be detected
Detection evades part by during detection zone, it is possible to the scanning launched using default attenuating device radiation appliance
The intensity for evading the corresponding flying spot beam in part with detection in beam is decayed, to cause detection to evade the absorption of part
Close rate is less than predetermined threshold value.Wherein, predetermined threshold value can be the safety value set according to actual conditions, and absorbed dose rate is used for
The energy absorption situation after object raying is weighed, it can refer to the absorbed dose of radiation in unit interval during object raying.Just
For the present invention, absorbed dose rate can also use single absorbed dose of radiation to characterize, and absorbed dose of radiation refers to unit mass material raying
The energy of radiation is absorbed afterwards, and single absorbed dose of radiation is radiation of the unit mass object absorbed in single irradiation detection process
Energy.
The accurate area distribution information that part is evaded in identified detection evades part on object to be detected for detection
Regional Distribution of Registered.During the direct of travel that object to be detected limits along radiation monitoring passage is advanced, there is left and right
During skew, when detection evades part and pass through detection zone, the specific block difference that is covered.Therefore, examined to accurately determine
When gauge keeps away part and passes through detection zone, the detection zone that part is covered is evaded in detection, it is also necessary to determines detected material body phase
For the position offset information in the centre position of radiation monitoring passage, according to detection evade part accurate area distribution information and
Position offset information, it is determined that when detection evades part and enters detection zone, region is evaded in the detection in detection zone.
In one embodiment of the invention, the traveling side that object to be detected can be guided to be limited along radiation monitoring passage
Upward centre position is advanced, and determines that area is evaded in the detection that detection is evaded when detection zone is passed through in part in detection zone to facilitate
Domain.
Thus, during object to be detected is by detection zone, it may be determined that the flying spot of radiation appliance transmitting
Targeted scans beam corresponding to region is evaded in Shu Zhongyu detections.Evade part in the detection of object to be detected and pass through detection zone
During, the intensity of targeted scans beam can be decayed using default attenuating device, to cause detection to evade
Partial absorbed dose rate is less than predetermined threshold value.
So far, with reference to Fig. 1, Fig. 2A, Fig. 2 B illustrate determine object to be detected on detection evade region flow and
It will determine to detect the basic implementation process when method for evading region is applied to radiation monitoring field.Based on such scheme, this hair
It is bright to propose a kind of radiation checking system.With reference to specific embodiment just the present invention radiation checking system structure and on
Some details that text is addressed but is the failure to be described in detail are further elaborated.
Fig. 3 is the schematic block diagram for the structure for showing radiation checking system according to an embodiment of the invention.Wherein,
The object to be detected that radiation checking system can advance to the direct of travel limited along radiation monitoring passage carries out radiation monitoring.
Referring to Fig. 3, radiation checking system 300 can include first information acquisition device 310, the second information acquisition device
320 and processor 330.
First information acquisition device 310 can be arranged on the first pre-determined bit at the upstream preset distance of radiation monitoring passage
Put, for obtaining the attribute information related to object to be detected.Wherein, first information acquisition device 310 can be by actively right
Object to be detected is detected to obtain the attribute information of object to be detected, can also be obtained by way of being manually entered tested
Survey the attribute information of object.Part is evaded in the detection that acquired attribute information can include but is not limited in object to be detected
Approximate region distributed intelligence.
In the attribute information of the active obtaining object to be detected of first information acquisition device 310, first information acquisition device
Optoelectronic switch and its array, grating, light curtain, visual pattern and the automatic recognition of speech, microwave, radar, ultrasound, red can be used
Outside, polytype sensor such as laser scanning, magnetic field induction obtains the attribute information of object to be detected.
, can be by security staff when first information acquisition device 310 obtains attribute information by way of being manually entered
, can also be by installed in movement or the man-machine interface that other related personnel are provided by handheld touch-screen inputs attribute information
App input attribute informations in terminal (such as mobile phone), it can also be obtained by way of artificial speech, a variety of be manually entered such as take pictures
Take attribute information.So that object to be detected is vehicle as an example, when the direct of travel that vehicle limits along radiation monitoring passage is advanced,
Can be obtained by first information acquisition device 310 but be not limited to license plate number, type of vehicle, vehicle seat quantity, passengers inside the car
Distribution situation and the attribute letters such as other body colors, contour of the vehicle profile, driver identification are identified, driver's face is taken pictures
Breath.
Second information acquisition device 320 can be arranged on the second pre-determined bit at the upstream preset distance of radiation monitoring passage
Put, the relative position information between multiple characteristic portions for obtaining object to be detected.Wherein, multiple characteristic portions at least wrap
Include the lead and trail edge that part is evaded in the detection in object to be detected.Processor 330 is according to attribute information and multiple characteristic portions
Between relative position information, it may be determined that accurate area distribution information of the part in object to be detected is evaded in detection.
Specifically, processor 330 can determine object to be detected according to the relative position information between multiple characteristic portions
Elementary contour and/or characteristic area distributed intelligence.And the attribute information that first information acquisition device 310 obtains includes being detected
The approximate region distributed intelligence of part is evaded in detection in object, therefore processor 330 may further determine that portion is evaded in detection
Divide the accurate area distribution information in object to be detected.
In the present invention, the second information acquisition device 320 can use ranging, emission sensor, image analysis technology
The relative position information between multiple characteristic portions of object to be detected is obtained Deng various ways.The second acquisition of information is filled below
320 several possible implementations are put to 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, so that it may
To obtain the relative position information between representative multiple characteristic portions.
When obtaining the relative position information between multiple characteristic portions based on range measurement principle, the second information acquisition device
320 can use multiple spies of a variety of range units acquisition objects to be detected such as laser ranging system, ultrasonic distance-measuring sensor
Levy the relative position information between position.
So that the second information acquisition device 320 is laser ranging system as an example, laser ranging system can be arranged on radiation inspection
Look into top or the sidepiece (left side or right side) of passage.Laser ranging system can be according to predetermined frequency cycle to radiation
Channel scan laser beam is checked, the direct of travel that the exit direction of laser beam preferably limits with radiation monitoring passage hangs down substantially
Directly, 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
During the top of passage, laser ranging system can be preferably provided in the surface of radiation monitoring passage, now laser scanning face
Projection in the 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 should be able to preferably be more than detected material
The height of body.
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 to the survey under multiple cycles
Analyzed away from value, the elementary contour information of object to be detected can be obtained, and type according to object to be detected etc. belongs to substantially
Property information, it can further analyze to obtain relative between multiple characteristic portions and the multiple characteristic portions in object to be detected
Positional information.
When the second information acquisition device 320 is placed in the top of radiation monitoring passage using laser ranging system, consider
It is possible to that width is larger to object to be detected, the laser beam of a laser ranging system transmitting possibly can not be realized to whole tested
Survey the scanning of object.Therefore, the second information acquisition device 320 can also use two or more platform laser ranging systems.
For example, the second information acquisition device 320 can use two laser ranging systems.Wherein, a laser ranging dress
Put to be arranged on directly over radiation monitoring passage and offset certain distance (such as 800mm) place to the left, another laser ranging dress
Put to be arranged on directly over radiation monitoring passage and offset certain distance (such as 800mm) place to the right.This two laser ranging dresses
Put and can be used for measuring characteristic portion different on object to be detected.Pass through the features obtained to this two laser ranging systems
The information of position is collected, and can obtain the relative position information between multiple characteristic portions of whole vehicle.
In addition, when the second information acquisition device 320 is using laser ranging system, can also be to the width of object to be detected
And distance of the object to be detected away from the left of radiation monitoring passage or right side is detected.
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 be installed respectively
In radiation monitoring passage both sides, its measuring principle is emission part transmission signal, and acceptance division is judged according to whether receive signal
Whether it is blocked between emission part and acceptance division, judges to whether there is object to be detected between emission part and acceptance division with this.
Thus, the second information acquisition device 320 can use multiple emission sensors or emission sensor array, more
Emission part and acceptance division in individual emission sensor or emission sensor array can be separately positioned on radiation monitoring passage
Both sides, the test surfaces of multiple emission sensor or emission sensor arrays can generally within same plane, and with
The direct of travel that radiation monitoring 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
The whole side portion structure information of object.Analyzed by counter-lateral quadrents structural information, can further obtain multiple characteristic portions
And the relative position information between multiple characteristic portions.
In addition, the second information acquisition device 320 is when using multiple emission sensors or emission sensor array, it is more
Emission part and acceptance division in individual emission sensor or emission sensor array can also be separately positioned on radiation monitoring and lead to
The top and bottom in road.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, it is possible 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.
By taking the vehicle shown in Fig. 2A, Fig. 2 B as an example, the second information acquisition device 320 can use correlation Measuring light screen/
Grating/array photoelectric, it may be mounted at the both sides of scan channel, the biography of correlation Measuring light screen/grating/array photoelectric transmitting
Sensor detection signal has stronger penetration capacity, can penetrate glass for vehicle window, and sensor detection signal coverage can be from
Ground above 250mm is examined height of car to maximum.
At this point it is possible to vehicle head forefront P1, vehicle contouring head flex point P2, anterior (the A branch of vehicle first row vehicle window
Post position) P4a and P4a', vehicle roof forward position (edge on front windshield) P5, vehicle first row vehicle window rear portion (B shore positions,
And the front portion of second row vehicle window) after P6 and P6', vehicle second row vehicle window rear portion (B-C post position) P8 and P8', vehicle roof
Profile flex point (edge on rear seat windscreen) P9, vehicle tail profile flex point P11, vehicle tail are held finally along characteristic portions such as P12
It is identified and positions.
3rd, image analysis technology
Second information acquisition device 320 is also based on multiple characteristic portions that image analysis technology obtains object to be detected
Between relative position information.Specifically, the second information acquisition device 320 can use imaging sensor, imaging sensor
Top and/or the sidepiece of radiation monitoring passage can be arranged on.Imaging sensor is used to be imaged object to be detected, can pass through
Formed image is analyzed, obtain object to be detected multiple characteristic portions and multiple characteristic portions between relative position
Put relation.Wherein, it is known to those skilled in the art on image analysis technology, repeat no more here.
By taking the vehicle shown in Fig. 2A, Fig. 2 B as an example, the second information acquisition device 320 can use image visual transducer,
Such as video surveillance camera.Video surveillance camera may be mounted at the side of radiation monitoring passage, distance driving road surface certain altitude
(such as 1~2.5 meter), the coverage of camera detection image can be at least from ground above 250mm to the examined vehicle of maximum
Highly.
Alternatively, the second video surveillance camera is arranged on the opposite side of scan channel, distance driving road surface certain altitude (ratio
Such as 1~2.5 meter)；Directly over 3rd video surveillance camera is arranged among scan channel, apart from road surface certain altitude (such as 3~
6 meters)；4th video surveillance camera is installed on above scan channel (apart from road surface certain altitude, such as 3~6 meters), apart from passage
Skew a certain distance (such as 875mm) on the left of mediad directly over middle；5th video surveillance camera is installed on scan channel
Top (apart from road surface certain altitude, such as 3~6 meters), skew a certain distance on the right side of the mediad of surface among passage
(such as 875mm).
For the image for shooting to obtain using monitoring camera, it can detect and sentence by image preprocessing and related algorithm
Break and the characteristic area of vehicle, can such as detect comprise at least for vehicle window, windshield region and its edge detection and
Positioning.Specifically, it is anterior (A shore positions) that forefront P1, vehicle contouring head flex point P2, vehicle first row vehicle window can be detected
P4a and P4a', vehicle roof forward position (edge on front windshield) P5, vehicle first row vehicle window rear portion (B shore positions, Ye Shi
The front portion of two row's vehicle windows) P6 and P6', vehicle second row vehicle window rear portion (B-C post position) P8 and P8', vehicle roof rear end profile
Flex point (edge on rear seat windscreen) P9, vehicle tail profile flex point P11, vehicle tail are finally along characteristic portions such as P12.
So far, with reference to Fig. 3 with regard to being used to determine that portion is evaded in the detection on object to be detected in the radiation checking system of the present invention
The structure divided elaborates.Alternatively, radiation checking system of the present invention can also include other functional parts.
First, offset detecting device
As shown in figure 4, radiation checking system 300 can also alternatively include the 3rd acquisition of information in figure shown in dotted line frame
Device 340.3rd information acquisition device 340 can be used for obtaining centre position of the object to be detected relative to radiation monitoring passage
Position offset information.The accurate area distribution information and position offset information of part are evaded according to detection, processor 330 can be with
When being accurately determined detection and evading part and enter detection zone, region is evaded in the detection in detection zone.
3rd information acquisition device 340 can be believed by obtaining object to be detected and the distance of radiation monitoring passage both sides
Breath, determine the position offset information of object to be detected.Specifically, the 3rd information acquisition device 340 can obtain object to be detected
Distance W1 on the left of radiation monitoring passage and distance W2, W1 on the right side of radiation monitoring passage are more than W2, then show by
Detection object right avertence, W1 are less than W2, then show object to be detected left avertence.
Object to be detected and the range information of radiation monitoring passage both sides can also be real by the range measurement principle addressed above
Existing, i.e. the 3rd information acquisition device 340 can also use laser range sensor/laser diffusion laser range sensor/super
The range units such as sound ranging sensor.As the alternative embodiment of the present invention, the 3rd information acquisition device 340 can be
The second information acquisition device 320 addressed above, you can with by the second information acquisition device 320 obtain object to be detected relative to
The position offset information in the centre position of radiation monitoring passage.Wherein, the 3rd information acquisition device 340 uses laser ranging, surpassed
The acquisition of the range units such as sound ranging can apart from the range measurement principle of the range information of object to be detected Yu radiation monitoring passage both sides
To see above associated description, repeat no more here.
2nd, radiation imaging apparatus
As shown in figure 4, radiation checking system 300 can also alternatively include the radiation imaging apparatus in figure shown in dotted line frame
350.Radiation imaging apparatus 350 can be arranged on the radiation monitoring opening position of radiation monitoring passage, for launching flying spot beam
To be scanned to object to be detected and generate radiation image.Wherein, radiation imaging apparatus 350 can be transmission-type radiant image
Device can also be scattering formula radiation imaging apparatus, such as can be back-scatter radiation imaging device.Radiation imaging apparatus 350 can be with
Mainly it is made up of scanning means and detector.
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 shield that lead or tungsten material can be used to form around it
The useless beam of non-directive detection zone is shielded.Collimater can be arranged in the radiation direction of radiation source, collimation
Device provided with line stitch, collimater can by line stitch about radiation source beam radiate X-ray beam in short transverse (with scanning side
To vertical) subtended angle and scanning direction (direction of motion of object to be detected) on width.The beam of radiation emission passes through
The line of line seam acts on the flying spot beam to be formed and launched to detection zone.
Scanning means can be arranged on the first precalculated position in radiation monitoring passage, be scanned for launching to detection zone
Beam.Wherein, the first precalculated position can be the top, bottom or sidepiece of radiation monitoring passage.Scanning means transmitting is swept
The direction of propagation for retouching beam is preferably vertical with the direct of travel that radiation monitoring passage limits.Detection zone can refer to scan
The region that beam is covered, in the direction of propagation of the flying spot beam feelings vertical with the direct of travel that radiation monitoring passage limits
Under condition, detection zone is the face region of the direct of travel limited perpendicular to radiation monitoring passage.
Radiation imaging apparatus 350 can include one or more detectors.According to the radiant image of radiation imaging apparatus 350
Principle is different, and the specific set-up mode of detector also differs.Specifically, radiated in radiation imaging apparatus 350 for transmission-type
During imaging device, detector can be arranged in radiation monitoring passage different from the of the first precalculated position residing for scanning means
Two precalculated positions.For example, when being the top of radiation monitoring passage in the first precalculated position, the second precalculated position can be radiation inspection
When the sidepiece looked into passage and/or bottom in the first precalculated position are the bottom of radiation monitoring passage, the second precalculated position can be with
It is the sidepiece in radiation monitoring passage and/or top, in the first precalculated position during the sidepiece for radiation monitoring passage, second is predetermined
Position can be top, bottom or opposite side in radiation monitoring passage.In addition, it is scattering formula in radiation imaging apparatus 350
During imaging device such as back-scatter radiation imaging device, detector and scanning means can be arranged on the same of radiation monitoring passage
Side.
Preferably, when setting multiple detectors in radiation monitoring passage, the test surface of multiple detectors can be with scanning
The direction of propagation of the flying spot beam of device transmitting is vertical, and the center line of the test surface of multiple detectors can be substantially one
In individual plane.Wherein, center line described herein refers to substantially belong to unidirectional center line in the test surface of multiple devices.Lift
For example, the test surface of detector is rectangle mostly, and the center line of rectangle can include the center line of long side and cross short side
Center line, after the test surface fixation of multiple detectors, the center line in the test surface of multiple detectors can be divided into approximately along water
Square to center line and center line substantially in the vertical direction, the center line of the test surface of multiple detectors is substantially flat at one
In face, refer to the center line of (horizontal and/or vertical) substantially in the same direction substantially in a plane.
2nd, attenuating device
As shown in figure 4, the radiation checking system 300 of the present invention can also alternatively include the decay in figure shown in dotted line frame
Device 120.
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 present invention attenuating device 120 can be by one or more have compared with
The material composition of strong ray attenuation ability, such as aluminium, iron, copper, lead, alloy etc..
Attenuating device 120 can realize the decay to strafing wire harness by blocking flying spot beam.Wherein, attenuating device
120 can have a multiple-working mode, and attenuating device 120 can be to sweeping in radiation imaging apparatus 350 under different working modes
The intensity of the flying spot beam of different piece is decayed in the flying spot beam of imaging apparatus transmitting.In other words, attenuating device
The flying spot Shu Jinhang of different piece is blocked in the 120 flying spot beams that can launch scanning means, to realize to difference
The decay of partial flying spot beam.
In embodiments of the present invention, processor 330 can also determine the flying spot Shu Zhongyu detections of scanning means transmitting
Evade targeted scans beam corresponding to region, and during detection evades part by detection zone, control decay dress
The intensity for putting 120 pairs of targeted scans beams decays, to cause the absorbed dose rate of part is evaded in detection to be less than default threshold
Value.Wherein, predetermined threshold value can be the safety value set according to actual conditions, and absorbed dose rate is used for after weighing object raying
Energy absorption situation, it can refer to the absorbed dose of radiation in unit interval during object raying.For the present invention, absorbent
Dose rate can also use single absorbed dose of radiation to characterize, and absorbed dose of radiation refers to the energy that radiation is absorbed after unit mass material raying,
Single absorbed dose of radiation is the energy of radiation of the unit mass object absorbed in single irradiation detection process.
As it was noted above, scanning means mainly can be made up of radiation source and collimater.Wherein, radiation source is penetrated for transmitting
Wire harness, collimater are stitched provided with line, and the beam of radiation emission is formed after line stitches to be swept to what detection zone was launched
Retouch beam.
Therefore, attenuating device 120 can be stitched by blocking the line of different parts, realized and swept to what is be emitted from corresponding site
Retouch the decay of beam.Wherein, attenuating device 120 is when the intensity of the flying spot beam to appropriate section decays, can be with
Complete attenuation or part are decayed, as long as so that going out the object to be detected at position corresponding to flying spot beam after decay
Absorbed dose rate is less than predetermined threshold value.
In theory, the detection with object to be detected is likely to from all flying spot beams of the line seam outgoing of collimater
It is corresponding to evade part.It is therefore preferred that attenuating device 120 should be configured to the whole from line seam outgoing or big portion
The flying spot Shu Jinhang decay divided.
As the alternative embodiment of the present invention, attenuating device 120 can be made up of multiple attenuation units.Multiple decay
Unit can correspond respectively to the different parts of line seam, can be separate structure between multiple attenuation units, each
Attenuation units can be stitched by blocking the line at its corresponding position, realize the flying spot 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.Its corresponding portion can be blocked by mobile attenuation units
The line seam 1151 divided, realize the decay of the intensity for the flying spot beam being emitted to the line seam from its corresponding part.Such as figure
Shown in 5B, the line seam 1151 at its corresponding position can be blocked by mobile attenuation units S7, S8, to what is be emitted from the position
The intensity of flying spot beam is decayed.As shown in Figure 5 C, another part beam can also be blocked by mobile attenuation units S3-S6
Stream seam 1151, realize the decay to the flying spot beam from the seam outgoing of another part line.
As described above, attenuating device preferably should be configured to from line seam outgoing wholly or largely
Flying spot Shu Jinhang decays.Therefore, form multiple attenuation units of attenuating device can preferably correspond to it is whole or most of
Line seam 1151.In addition, the multiple attenuation units for forming attenuating device can also correspond only to part line seam 1151, now this
Integral translation is done in the direction that multiple attenuation units can stitch 1151 along line, to allow attenuating device to whole or big portion
The flying spot Shu Jinhang decay of the line seam outgoing divided.
When attenuating device 120 is made up of multiple attenuation units, the length of the line seam 1151 corresponding to single attenuation units
Degree can be considered as control accuracy of the attenuating device 120 to flying spot beam, the line seam 1151 corresponding to single attenuation units
Length is shorter, and the minimum controllable part of flying spot beam is smaller, and the control accuracy of attenuating device 120 is higher.In actual applications,
Form the attenuation units of attenuating device 120 number and each attenuation units corresponding to the length of line seam 1151 can be with
Set according to the actual requirements, 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, for example, 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, with right
Decayed from the intensity of the flying spot beam of the outgoing of line seam 1151 at the position, and attenuation block 1212 can also be driven remote
The line seam 1151 at position corresponding from its, to enable the flying spot beam of the outgoing of line seam 1151 from the position normal
Incide detection zone.Drive device 1211 can be a variety of actuating units such as stretching structure, push-pull mechanism.For example, driving dress
It can be high-speed electro-magnet to put 1211.
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
It 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 is made
With rear, the absorbed dose rate for inciding the corresponding site on the object to be detected in detection zone is less than predetermined threshold value.Wherein, decline
Subtracting the thickness of block 1212 can determine according to the material of attenuation block 1212 and the particularly relevant parameter of system.
As those skilled in the known, irradiated, inhaled by beam (such as X ray) 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.
Intensity can be reduced after ray passes through material, and this is referred to as decaying, different metal material (such as aluminium, iron, copper, lead, conjunction
Gold etc.) to the attenuation coefficient difference of X ray.The physical quantity of description ray attenuation property is referred to as attenuation rate, and its calculation formula is：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 system
Number, 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
(μSv·m2·h-1), detection evades part and evades the corresponding flying spot in part with the distance between radiation source (m), with detection
Beam incides the relative moving speed (m/s) detected between the beam width evaded 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 113 and attenuation block 1212 is determined.Wherein, angle of radiation β
The control accuracy of attenuating device can be considered as, angle of radiation β is smaller, and the control accuracy of attenuating device 120 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 work
Vertical view state schematic diagram when making.
As shown in Figure 8 A, attenuating device can be made up of 13 attenuation units S1-S13.Wherein, each attenuation units include
High speed load push-pull 1051 (preferably high-speed electro-magnet), attenuation block 1052, locating rod 1053, push rod 1054.Attenuation block 1052
Installation on the securing lever 1053.Locating rod 1053 is connected with the end of push rod 1054.Push rod 1054 is the fortune of high speed load push-pull 1051
Dynamic 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).In the flow of radiation monitoring is carried out to object to be detected such as vehicle, it can be detected by control system according to acquired
Characteristic information of the object in radiation monitoring passage is surveyed, the related attenuation units of order control is optionally sent and performs 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 115 and attenuating device 120 can be installed within mounting bracket
On 1041.Scanning means can also include switching device 117, and switching device 117 is used to control radiation source 113 to send out to detection zone
The occlusion state for the beam penetrated.Switching device 117 can be by having the radiation shielding material of extremely strong damping capacity to ray
It is made, such as lead, tungsten.Switching device 117 can be by quick tight shut-off or opening ray window, quickly to beat on and off
Close the beam of the guiding detection zone of the transmitting of radiation source 113.Wherein, switching device 117 can completely stop penetrate when closed
Line is passed through to security sweep region, during opening, does not stop that any useful beam is launched to detection zone.
3rd, detection means
As shown in figure 4, radiation checking system can also alternatively include the information detector in figure shown in dotted line frame
370.One or more characteristic portions that information detector 370 can be used for detecting on object to be detected reach radiation monitoring position
Information at the time of putting.For example, the front-end and back-end that information detector 370 can detect object to be detected reach detection zone
At the time of the lead and trail edge that part is evaded in detection on moment, object to be detected reaches detection zone.
Information at the time of being detected according to information detector 370, the flying spot that radiation imaging apparatus can be launched
Shu Jinhang is handled accordingly.For example, information detector 370, which can detect, detects the forward position arrival detection zone for evading part
First moment, detection evade the rear along reaching the second moment of detection zone of part, and send the comprising the first moment respectively
One detection signal, the second detection signal comprising the second moment.Processor 330 can predefine detection and evade part by inspection
Direction ray beam corresponding to part is evaded in the flying spot Shu Zhongyu detections of radiation imaging apparatus transmitting when surveying region.In this way, place
Device 330 is managed after first detection signal and the second detection signal is received, attenuating device 120 can be controlled to start at the first moment
The intensity of targeted scans beam is decayed, and controls attenuating device 120 to stop at the second moment to targeted scans ray
The intensity of beam is decayed.Thus, ensureing that detection evades part not in the case of by high-level radiation, do not influenceing also to tested
The normal detection of part is evaded in the non-detection surveyed on object.
Information detector 370 can determine that the characteristic portion of object to be detected reaches detection zone in several ways
Time information.For example, information detector 370 can close to detection zone set, its can use to penetrate photoelectric sensor or
To penetrating picking sensor, including emission part and acceptance division, emission part and acceptance division are separately mounted to radiation monitoring passage both sides,
When the characteristic portion of object to be detected is reached between emission part and acceptance division, the light path between emission part and acceptance division can be blocked,
Now acceptance division can not receive the signal of emission part transmitting, in response to the interruption of reception signal, it is possible to determine characteristic portion
Information at the time of reaching detection zone.
3rd, guider
As shown in figure 4, radiation checking system 300 can also alternatively include the guider 380 in figure shown in dotted line frame,
For guiding the centre position on the direct of travel that object to be detected limited along radiation monitoring passage to advance.Wherein, it is oriented to dress
Putting 380 can guide in several ways.For example, guider 380 can lead in object to be detected into radiation monitoring
During road, guiding object to be detected is advanced along centre position, and can be led in object to be detected in radiation along radiation monitoring
During the direct of travel that road limits is advanced, periodically or detecting object to be detected not along centre position traveling
When, guide again.
Specific embodiment
Fig. 9 is to show the schematic diagram when radiation checking system built using the present invention is detected to vehicle.
Referring to Fig. 9, first information device 1101 is arranged on the upstream of radiation monitoring passage, such as can be located at principal ray beam
The entrance side of upstream passageway.Wherein, principal ray beam refers to that collimated useful of most strong ray portion that radiation source 101 is launched is penetrated
The position that wire harness plane passes through in radiation monitoring passage, the transmissive portion or scattered portion of useful beam will be by X-ray detection Xs
Device is received for generating check image.
First information device 1101 is mainly used in determining to detect the accurate area distribution information for evading part, i.e. car on vehicle
Region with personnel's distribution on.Briefly, first information device 1101 can be by being manually entered or obtaining automatically
Mode obtains the substantially distribution situation of people personnel in vehicle, then can utilize the skills such as ranging, emission sensor, graphical analysis
Art is positioned and identified to multiple characteristic portions of vehicle, thereby determines that the accurate area distribution letter where personnel on vehicle
Breath.First information device 1101 determine vehicle on personnel accurate area distribution information implementation may refer to figure 1 above-
Fig. 3 associated description, is repeated no more here.
Second massaging device 1102 is arranged on the upstream of radiation monitoring passage, can preferably be positioned close to principal ray beam
Upstream side.Second massaging device 1102 is determined for one or more characteristic portions of object to be detected by the second letter
Information at the time of ceasing 1102 position of device.Wherein, the second massaging device 1102 can include multiple detection units, different
Detection unit can be used for detecting the different characteristic position of vehicle.Cleaning Principle on detection unit may refer to
Text repeats no more here to the associated description of detection means.
3rd massaging device 1103 is arranged between the massaging device 1102 of first information device 1101 and second, the 3rd information
Device 1103 can be used for measuring the left and right offset of vehicle.Wherein, the calculating of vehicle width：W1=W0-W1-W2；Partially
Shifting amount of1=| W1-W2 |, if W1-W2<0, then deviate for vehicle to the left side and travel, if W1-W2>0, then for vehicle to the right
Deviate traveling in side.Wherein, W0 is the width of radiation monitoring passage, and W1 is the distance between on the left of vehicle and radiation monitoring passage,
W2 is the distance between vehicle and radiation monitoring passage right side.In addition, the 3rd massaging device 1103 can also detect the one of vehicle
Information at the time of during individual or multiple three massaging devices 1103 of characteristic portions arrival.
4th massaging device 1104 is located at principal ray beam downstream fixed range (such as can be apart from principal ray beam
300mm), it can be used for detecting vehicle tail at the time of finally leave the 4th massaging device 1104 along P12, and vehicle can be measured
Average speed v2, v2=L2/t2 between the second massaging device 1102 and the 4th massaging device 1104.Wherein, L2 second
Horizontal direction spacing between the massaging device 1104 of massaging device 1102 and the 4th, t2 are vehicle characteristics position P1 from the second information
Device 1102 proceeds to the time of the 4th massaging device 1104.
Radiation source 101 is arranged at the top of radiation monitoring passage, and shutter 102 can be sent out radiation source 101 to detection zone
The occlusion state for the flying spot beam penetrated is controlled.Attenuating device 105 can collimate to the collimator that radiation source 101 is launched
The intensity for inciding the flying spot beam of different piece in the flying spot beam in detection zone afterwards is decayed.Wherein, on
The structure and attenuation principle of attenuating device 105 may refer to related description above, and here is omitted.So that only master drives in vehicle
The radiation monitoring flow that room is sailed when having in case of personnel is as follows.
Initial time, radiographic source 101, which is in, stops emission lines state, or radiographic source 101 is in emission lines but shutter
102 are closed, and attenuating device 105 does not work.
, can be by first when the direct of travel that vehicle limits along radiation monitoring passage passes through first information device 1101
Massaging device 1101 determines the accurate area distribution information of driver in vehicle, is continued in vehicle by the 3rd massaging device
When 1103, it can determine that vehicle deviates the position skew letter in the centre position of radiation monitoring passage by the 3rd massaging device 1103
Breath.
Thus, processor can offset letter according to the accurate area distribution information of driver in vehicle and the position of vehicle
Breath, when determining that detection zone is passed through in main driving room on vehicle, detect corresponding with main driving room evades region in detection zone.From
And can determine that targeted scans beam corresponding to region is evaded in the flying spot Shu Zhongyu detections that radiographic source 101 is launched, and then
When may further determine that detection zone is passed through in main driving room, the mode of operation of attenuating device 105.
When the second massaging device 1102 detects that the forward position P1 of vehicle passes through, the divergent-ray of radiographic source 101 can be controlled
Beam or shutter 102 are in open mode.The forward position P4 or P4a for detecting main driving room in the second massaging device 1102 pass through
When, the mode of operation of attenuating device 105 can be controlled so that in the flying spot beam that attenuating device 105 is launched radiographic source 101
The intensity for evading the corresponding targeted scans beam in region with detection is decayed.So ensureing main driving room not by high intensity
In the case of radiation, the normal detection for evading part such as copilot room to the non-detection on vehicle is not influenceed also.
Second massaging device 1102 detect main driving room it is rear along P6 pass through when, attenuating device 105 can be controlled to stop
Work, normally to be detected to vehicle.
When the 4th massaging device 1104 detects that vehicle rear passes through along P12, show that object to be detected is completely logical
Cross detection, can now control radiographic source 101 be in stop emission lines state, or radiographic source 101 be in emission lines still it is fast
Door 102 is closed.
The radiation checking system and method 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 not limited to disclosed each embodiment.In the case of without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes will be apparent from for the those of ordinary skill in art field.The selection of term used herein, purport
The principle of each embodiment, practical application or improvement to the technology in market are best being explained, or is making the art
Other those of ordinary skill are understood that each embodiment disclosed herein.
Claims (12)
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, including：
First information acquisition device, the first precalculated position being arranged at the upstream preset distance of the radiation monitoring passage, use
In the attribute information for obtaining object to be detected, the big of part is evaded in the detection that the attribute information is included in the object to be detected
Cause area distribution information；
Second information acquisition device, the second precalculated position being arranged at the upstream preset distance of the radiation monitoring passage, use
Relative position information between multiple characteristic portions of object to be detected are obtained, the multiple characteristic portion comprise at least described
The lead and trail edge of part is evaded in detection；
Processor, for according to the relative position information between the attribute information and the multiple characteristic portion, it is determined that described
Accurate area distribution information of the part in the object to be detected is evaded in detection.
2. radiation checking system according to claim 1, in addition to：
3rd information acquisition device, for obtaining the object to be detected relative to the centre position of the radiation monitoring passage
Position offset information,
The processor evades the accurate area distribution information of part and the position offset information according to the detection, determines institute
When stating detection and evading part and enter detection zone, region is evaded in the detection in the detection zone.
3. radiation checking system according to claim 2, in addition to：
Scanning means, the radiation monitoring opening position being arranged in the radiation monitoring passage, scanned for launching to detection zone
Beam；
One or more detectors, the precalculated position being arranged in the radiation monitoring passage, for receiving from the detection zone
The imaging ray beam of object to be detected transmission or scattering in domain；
Attenuating device, the intensity of the flying spot beam for launching the scanning means decay,
The processor is additionally operable to determine that detection described in the flying spot Shu Zhongyu of the scanning means transmitting is evaded region and corresponded to
Targeted scans beam, and it is described detection evade part by the detection zone during, control it is described decay dress
Put and the intensity of the targeted scans beam is decayed, to cause the absorbed dose rate for evading part that detects less than pre-
If threshold value.
4. radiation checking system according to claim 3, in addition to：
Information detector, for detecting first moment for detecting the forward position arrival detection zone for evading part, institute
State detection and evade the rear along reaching the second moment of the detection zone of part, and send the comprising first moment respectively
One detection signal, second detection signal at second moment is included,
The processor is additionally operable to receive the first detection signal and second detection signal, and controls the attenuating device
Start to decay to the intensity of the targeted scans beam at first moment, control the attenuating device described
Two moment stopped decaying to the intensity of the targeted scans beam.
5. radiation checking system according to claim 1, wherein,
Second information acquisition device is laser ranging system, is arranged on top or the sidepiece of the radiation monitoring passage, is used
According to predetermined frequency, to the radiation monitoring channel emission laser beam, the exit direction of the laser beam is examined with the radiation
It is substantially vertical to look into the direct of travel of passage restriction,
For each transmit cycle, the laser ranging system obtains the laser beam pair of each angle according to predetermined angular resolution
The distance measurement value answered, to obtain multiple distance measurement values, by analyzing all distance measurement values under multiple transmit cycles, obtain
Relative position information between the multiple characteristic portion.
6. radiation checking system according to claim 1, wherein, second information acquisition device includes：
Imaging sensor, be arranged on top and/or the sidepiece of the radiation monitoring passage, for the object to be detected into
Picture,
The processor is additionally operable to formed graphical analysis, to obtain the letter of the relative position between the multiple characteristic portion
Breath.
7. radiation checking system according to claim 1, wherein, second information acquisition device includes：
Multiple emission sensors, each emission sensor include emission part and acceptance division, are separately positioned on the radiation inspection
The both sides of passage are looked into, each emission part is used to launch predetermined signal to its corresponding acceptance division,
The processor is additionally operable to the signal reception condition according to multiple acceptance divisions, determines between the multiple characteristic portion
Relative position information.
8. radiation checking system according to claim 1, in addition to：
Guider, for guiding the centre on the direct of travel that the object to be detected limited along the radiation monitoring passage
Advance position.
9. a kind of radiation testing method, the object to be detected for being advanced to the direct of travel limited along radiation monitoring passage enters
Row radiation monitoring, this method include：
The attribute information of object to be detected is obtained, part is evaded in the detection that the attribute information is included in the object to be detected
Approximate region distributed intelligence；
The relative position information between multiple characteristic portions of object to be detected is obtained, the multiple characteristic portion comprises at least institute
State the lead and trail edge that part is evaded in detection；
According to the relative position information between the attribute information and the multiple characteristic portion, determine that part is evaded in the detection
Accurate area distribution information.
10. radiation testing method according to claim 9, in addition to：
Obtain position offset information of the object to be detected relative to the centre position of the radiation monitoring passage；
The accurate area distribution information of part and the position offset information are evaded according to the detection, determine that the detection is evaded
When part enters detection zone, region is evaded in the detection in the detection zone.
11. radiation testing method according to claim 10, wherein, in the mistake that the object to be detected passes through detection zone
Cheng Zhong, launch flying spot beam to detection zone using scanning means, to realize the detection to the object to be detected, this method
Also include：
Determine that targeted scans beam corresponding to region is evaded in detection described in the flying spot Shu Zhongyu of the scanning means transmitting；
During the detection evades part by the detection zone, the target is swept using default attenuating device
The intensity for retouching beam is decayed, and is less than predetermined threshold value with the absorbed dose rate for causing the detection to evade part.
12. radiation testing method according to claim 9, in addition to：
The centre position on the direct of travel that the object to be detected limited along the radiation monitoring passage is guided to advance.
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