CN110459338A - Screened room, radiation source device and vehicle safety detection system - Google Patents
Screened room, radiation source device and vehicle safety detection system Download PDFInfo
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- CN110459338A CN110459338A CN201810433927.2A CN201810433927A CN110459338A CN 110459338 A CN110459338 A CN 110459338A CN 201810433927 A CN201810433927 A CN 201810433927A CN 110459338 A CN110459338 A CN 110459338A
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- 230000005855 radiation Effects 0.000 title claims abstract description 97
- 238000001514 detection method Methods 0.000 title claims abstract description 64
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000033001 locomotion Effects 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 7
- 239000000956 alloy Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 240000007509 Phytolacca dioica Species 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910001080 W alloy Inorganic materials 0.000 description 2
- 238000003491 array Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910000863 Ferronickel Inorganic materials 0.000 description 1
- NMFHJNAPXOMSRX-PUPDPRJKSA-N [(1r)-3-(3,4-dimethoxyphenyl)-1-[3-(2-morpholin-4-ylethoxy)phenyl]propyl] (2s)-1-[(2s)-2-(3,4,5-trimethoxyphenyl)butanoyl]piperidine-2-carboxylate Chemical compound C([C@@H](OC(=O)[C@@H]1CCCCN1C(=O)[C@@H](CC)C=1C=C(OC)C(OC)=C(OC)C=1)C=1C=C(OCCN2CCOCC2)C=CC=1)CC1=CC=C(OC)C(OC)=C1 NMFHJNAPXOMSRX-PUPDPRJKSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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- 239000010935 stainless steel Substances 0.000 description 1
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
-
- 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
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F5/00—Transportable or portable shielded containers
- G21F5/02—Transportable or portable shielded containers with provision for restricted exposure of a radiation source within the container
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F5/00—Transportable or portable shielded containers
- G21F5/06—Details of, or accessories to, the containers
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- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Measurement Of Radiation (AREA)
Abstract
The present invention relates to a kind of screened room, radiation source device and vehicle safety detection systems.Screened room includes: shielding ontology, with accommodate radiographic source chamber and with the opening of chamber, shielding ontology is placed close to ground or is embedded in below ground predetermined depth and avoids being open, so that alignment opening when radiographic source is located at chamber indoor first position, and by outward opening radiation ray, radiographic source cannot pass through outward opening radiation ray when being located at the indoor second position of chamber；Wherein, the first shielding part and secondary shielding portion are divided by ontology is shielded by the horizontal plane of first position and the second position, and secondary shielding portion, close to ground, the part of the first shielding part except the opening is greater than area of section of the secondary shielding portion in corresponding perpendicular in the area of section in any perpendicular.The shielding material dosage of the screened room is few, light-weight, significantly reduces cost while meeting shield effectiveness.
Description
Technical field
The present invention relates to safety detection technology fields, more particularly to a kind of screened room, radiation source device and vehicle safety
Detection system.
Background technique
Radiography is gradually applied to vehicle safety detection system because its image clearly, can quickly find contraband
In system, the labor intensity of testing staff was both alleviated, detection efficiency is also improved.
Radiation source device is the key equipment of vehicle inspection system, and radiographic source is placed in thick and heavy shielding ontology,
Shielding ontology is generally made of more expensive heavy alloy material, and the dosage of high density material directly affects radiographic source dress
The cost set, and then the picture quality and runnability of vehicle safety detection system are directly affected, and operation maintenance cost
Also rather considerable.Therefore, the use of heavy alloy material how is reduced under the premise of not influencing to shield the shield effectiveness of ontology
Amount becomes urgent problem to be solved.
Summary of the invention
It is an object of the present invention to provide a kind of screened room and radiation source devices, and light weight and cost is cheap, and shield
It works well.
It is a further object to provide a kind of vehicle safety detection system, detection image is clear, detection efficiency
It is high.
In a first aspect, the embodiment of the present invention proposes a kind of screened room comprising: shielding ontology has and accommodates radiographic source
Chamber and opening with chamber, shielding ontology placed close to ground or be embedded in below ground predetermined depth and keep away
Opening, so that alignment opening when radiographic source is located at chamber indoor first position, and pass through outward opening radiation ray, radiographic source
Outward opening radiation ray cannot be passed through when the second position indoor positioned at chamber；Wherein, by first position and the second position
Horizontal plane is divided into the first shielding part and secondary shielding portion for ontology is shielded, and secondary shielding portion is close to ground, the first shielding part
Part except the opening is greater than secondary shielding portion in corresponding perpendicular in the area of section in any perpendicular
Area of section.
According to an aspect of an embodiment of the present invention, the first shielding part is by bus around by first position and the second position
Horizontal axis rotation predetermined angular after the revolving body that is formed, and revolving body is relative to by first position and the second position
Perpendicular is symmetrical arranged.
According to an aspect of an embodiment of the present invention, bus is sequentially connected 1/4 circular arc, straight line and 1/ in the horizontal direction
4 circular arcs, the first position of chamber are overlapped with the centre of sphere for the arc sphere that one of them 1/4 circular arc is rotarily formed, the second position with
The centre of sphere for the arc sphere that another 1/4 circular arc is rotarily formed is overlapped.
According to an aspect of an embodiment of the present invention, chamber is set as central axis by first position and the second position
Cylindrical groove, and the first open-work with open communication is provided on the inner peripheral surface of cylindrical groove, so that radiographic source is located at first
Pass through the first open-work and outward opening radiation ray when position.
According to an aspect of an embodiment of the present invention, chamber includes the through-hole being arranged in succession in vertical direction and blind hole, blind
The diameter in hole is greater than the diameter of through-hole, and is provided on the step surface between blind hole and through-hole with the second of open communication thoroughly
Hole, first position and the second position are located in blind hole so that when radiographic source is located at first position by the second open-work and be open to
External radiation ray.
According to an aspect of an embodiment of the present invention, shielding ontology further comprises movable part, and movable part is by shielding
Cut and formed in the main part of ontology, movable part can along far from or move by the direction of close shield ontology, opened with being formed
Mouth closes opening.
According to an aspect of an embodiment of the present invention, it is open for collimator and in slit-shaped, so that radiographic source passes through opening
The fan-shaped scanning surface of the ray of radiation.
According to an aspect of an embodiment of the present invention, screened room further comprises pedestal, and pedestal has accommodating chamber, and shielding is originally
Body is removably placed in accommodating chamber, so that below ground is placed or are embedded in together to shielding ontology and pedestal close to ground
It predetermined depth and avoids being open.
Second aspect, the embodiment of the present invention also proposed a kind of radiation source device comprising: radiographic source, for penetrating
Line；Foregoing shielding ontology, radiographic source are movably contained in the chamber of shielding ontology, wherein when ray source movement
When to the first position of chamber, ray can pass through the outward opening radiation of shielding ontology；When radiographic source moves to the of chamber
When two positions, ray cannot be radiated by shielding the outward opening of ontology.
According to an aspect of an embodiment of the present invention, radiographic source is its in isotope 60Co, 137Cs, 192Ir, 75Se
Middle one kind.
According to an aspect of an embodiment of the present invention, radiation source device further includes transmission mechanism, transmission mechanism and radiographic source
Connection, to drive radiographic source to move back and forth between the first position and the second position of chamber.
On the other hand, the embodiment of the present invention also proposed a kind of vehicle safety detection system comprising: it penetrates as previously described
Source application；And detector assembly, it is correspondingly arranged with radiation source device to form detection zone, so that vehicle to be detected passes through inspection
It surveys region and carries out safety inspection.
Screened room provided in an embodiment of the present invention simplifies the structure for shielding ontology, so that heavy alloy shielding material
Dosage reduce nearly half, the cost of radiation source device is significantly reduced while meeting shield effectiveness.The present invention
The vehicle safety detection system that embodiment provides, using foregoing radiation source device, obtain to look up detection image clear
Reliably, and the overall cost of vehicle safety detection system is reduced.
Detailed description of the invention
The feature, advantage and technical effect of exemplary embodiment of the present described below with reference to the accompanying drawings.
Fig. 1 is the perspective structure figure of the first screened room provided in an embodiment of the present invention；
Fig. 2 is the main view of screened room shown in FIG. 1；
Fig. 3 is the perspective structure figure of second of screened room provided in an embodiment of the present invention；
Fig. 4 is the main view of the third screened room provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of the 4th kind of screened room provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the 5th kind of screened room provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of the 6th kind of screened room provided in an embodiment of the present invention；
Fig. 8 is a kind of perspective structure figure of radiation source device provided in an embodiment of the present invention；
Fig. 9 is the structural schematic diagram that radiation source device shown in Fig. 8 is placed in below ground；
Figure 10 is that the ray radiation of radiographic source when as collimator that is open of screened room provided in an embodiment of the present invention is illustrated
Figure；
Figure 11 is the structural schematic diagram of another radiation source device provided in an embodiment of the present invention；
Figure 12 is a kind of structural schematic diagram of vehicle safety detection system provided in an embodiment of the present invention；
Figure 13 is the structural schematic diagram of another vehicle safety detection system provided in an embodiment of the present invention.
Wherein:
1- shields ontology；G- bus；L- horizontal axis；The first position a-；The second position b-；The first shielding part of 1a-；1b-
Secondary shielding portion；1c- fixed ear；11- chamber；The first open-work of 11a-；11 ' the second open-works of a-；12- opening；13- movable part；2-
Pedestal；2a- chamber；2b- mounting groove；
10- screened room；20- radiographic source；21- screen bar；21 '-turntables；22 '-shielding axis；30- transmission mechanism；100- is penetrated
Source application；110- vehicle transportation device；V- vehicle to be detected；The ground G-；200- detector assembly；210- portal frame；
220- displays detector；500,500 '-vehicle safety detection systems.
In the accompanying drawings, identical component uses identical appended drawing reference.The attached drawing is not drawn according to the actual ratio.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, many details are proposed, in order to provide complete understanding of the present invention.But to those skilled in the art
It will be apparent that the present invention can be implemented in the case where not needing some details in these details.Below to implementation
The description of example is used for the purpose of providing by showing example of the invention and better understanding of the invention.In attached drawing and following
Description in, at least part of known features and technology are not shown, unnecessary fuzzy to avoid causing the present invention；
Also, for clarity, may be exaggerated the size of part-structure.In addition, feature described below, structure or characteristic can be with
It is incorporated in one or more embodiments in any suitable manner.
The noun of locality of middle appearance described below is direction shown in figure, is not to screened room of the invention, ray
The specific structure of source device and vehicle safety detection system is defined.In the description of the present invention, it is also necessary to which explanation is removed
Non- separately to have specific regulation and limit, term " installation ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, it can also
To be detachable connection, or it is integrally connected；It can be directly connected, can also be indirectly connected.For the common of this field
For technical staff, visual concrete condition understands the concrete meaning of above-mentioned term in the present invention.
For a better understanding of the present invention, it is filled below with reference to screened room, radiographic source of the Fig. 1 to Figure 13 to the embodiment of the present invention
It sets and vehicle safety detection system is described in detail.
Refering to fig. 1, the embodiment of the invention provides a kind of screened rooms 10, including shielding ontology 1.
Shielding ontology 1 has the chamber 11 for accommodating radiographic source and the opening 12 being connected to chamber 11, and shielding ontology 1 is close
Ground places or is embedded in below ground predetermined depth and avoids opening 12, so that radiographic source is located at first in chamber 11
Alignment opening 12 when setting a, and by 12 outside radiation rays of opening, radiographic source cannot when being located at the second position b in chamber 11
Pass through the 12 outside radiation rays that are open.
Wherein, by the horizontal plane of first position a and second position b will shield ontology 1 be divided into the first shielding part 1a and
Secondary shielding portion 1b, and secondary shielding portion 1b, close to ground, part of the first shielding part 1a in addition to opening 12 is any vertical
Area of section in plane is greater than area of section of the secondary shielding portion 1b in corresponding perpendicular.First shielding part 1a is used for
The episphere radiation areas of radiographic source are shielded, and the lower semisphere radiation areas of radiographic source rely primarily on secondary shielding portion 1b and soil
It shields together, to prevent the ray of the ray source radiation in chamber 11 from the other parts leakage in addition to opening 12.
Since shielding ontology 1 should have good shielding properties, mechanical performance and thermodynamic property, it to be also resistant to various gas
It waits, therefore is generally made of more expensive high-density tungsten alloy material, such as, but not limited to, tungsten ferronickel heavy alloy leads to
Cross mixing, compacting, cold isostatic compaction, sintered alloy density be 180.2g/cm3, tensile strength is about 800Mpa, hardness
For HRC24-30.Therefore, the structure size of secondary shielding portion 1b can be done as far as possible under the premise of meeting basic mechanical performance
To minimum, for example, secondary shielding portion 1b is only required to bear the radiographic source in chamber 11 and drives radiographic source in chamber 11
The gravity etc. of the driving device of reciprocating motion, so that the lower semisphere radiation areas of radiographic source rely primarily on ground or predetermined depth
Soil shield, to reduce the material cost and weight of screened room 10.
Shielding ontology 1 is placed or is embedded in below ground close to ground by screened room 10 provided in an embodiment of the present invention
Predetermined depth, compared with the existing technology in fully rely on valuable shielding material to shield the screen of the entire radiation areas of radiographic source
It covers for cell structure, the dosage of high density tungsten alloy shielding material reduces nearly half, pole while meeting shield effectiveness
The earth reduces the cost and weight of screened room 10.
The specific structure of screened room 10 is described in detail with reference to the accompanying drawing.
According to one embodiment of present invention, the first shielding part 1a for shielding ontology 1 is by bus G around by first position
The revolving body formed after the horizontal axis L rotation predetermined angular of a and second position b, and the revolving body is relative to by first
The perpendicular of position a and second position b is symmetrical arranged.Predetermined angular can be 120 °~180 °, and shielding ontology 1 is embedded in ground
The following predetermined depth in face is deeper, and the predetermined angular is smaller, and when shielding ontology 1 close to ground placement, which reaches most
Big value, i.e., close to 180 °, depending on specific use occasion.
Referring to Fig.2, the bus G of the first shielding part 1a of shielding ontology 1 can be sequentially connected 1/4 circle in the horizontal direction
The centre of sphere weight for the arc sphere that arc, straight line and 1/4 circular arc, the first position a of chamber 11 and one of them 1/4 circular arc are rotarily formed
It closes, second position b is overlapped with the centre of sphere for the arc sphere that another 1/4 circular arc is rotarily formed.
Secondary shielding portion 1b can be and the first integrally formed rectangular structure of shielding part 1a, the height of rectangular structure
It can accomplish as far as possible under the premise of meeting basic mechanical performance minimum.The opening 12 and chamber of thus obtained shielding ontology 1
Room 11 is connected to and is aligned with first position a, so that the ray that it is radiated when radiographic source is located at first position a is outside by opening 12
Radiation, the ray that it is radiated when radiographic source is located at second position b deviate opening 12 and cannot be by being open 12 to external radiation.
In Practical Project, ontology 1 is shielded for the ease of processing, can will shield 1 segmental machining of ontology, such as with bus 1a
On one section of 1/4 circular arc, one section of straight line and another section of 1/4 circular arc be separation, shielding ontology 1 is divided for three parts, each section
Respectively by powder metallurgy sintered form after, then the modes such as be fastened by bolts and be assembled into one.
Refering to Fig. 3, as an alternative embodiment, the bus G of the first shielding part 1a of shielding ontology 1 can also be
Long axis is located at 1/2 ellipse on horizontal axis L, wherein using 1/2 elliptical center as dot, by 1/2 elliptical long axis length three
After equal part, wherein the Along ent of two sides can be respectively the first position a and second position b of chamber 11.Thus obtained shielding
The opening 12 of ontology 1 is connected to chamber 11 and is aligned with first position a, so that its radiation when radiographic source is located at first position a
By opening 12 to external radiation, the ray that it is radiated when radiographic source is located at second position b deviates opening 12 and cannot pass through ray
Opening 12 is to external radiation.Similar with the embodiment in Fig. 2, secondary shielding portion 1b can be integrally formed with the first shielding part 1a
Rectangular structure, the height of rectangular structure can accomplish minimum as far as possible under the premise of meeting basic mechanical performance.It needs
Illustrate, the first position a and second position b of chamber 11 are not limited to the present embodiment the position, as long as meeting first
Position a can cannot pass through the 12 outside radiation rays that are open by 12 outside radiation rays of opening, in second position b.
Certainly, the structure of above-mentioned shielding ontology 1 is not limited to Fig. 2 and structure shown in Fig. 3, for example, shielding ontology 1 the
The revolving body that one shielding part 1a is formed after can also rotating 180 ° for sequentially connected 1/4 circular arc and straight line, as long as its thickness energy
Enough meet shielding demand.
Referring to Fig. 2 and Fig. 3, chamber 11 is set as central axis by the cylinder of first position a and second position b
Shape slot, and the first open-work 11a being connected to opening 12 is provided on the inner peripheral surface of cylindrical groove, so that radiographic source is located at first
Pass through 12 outside radiation rays of the first open-work 11a and opening when a of position.Cylindrical groove is also a housing for driving radiographic source first
The screen bar of linear reciprocating motion between position a and second position b.
Refering to Fig. 4, as an alternative embodiment, chamber 11 includes the 11 ' b of through-hole being arranged in succession in vertical direction
With 11 ' c of blind hole, the diameter of 11 ' c of blind hole is greater than the diameter of 11 ' b of through-hole, and the step between 11 ' b of 11 ' c of blind hole and through-hole
The second open-work 11 ' a, first position a and second position b being connected to opening 12 is provided on face to be located in 11 ' c of blind hole, so that
By 12 outside radiation rays of 11 ' a of the second open-work and opening when radiographic source is located at first position a.11 ' c of blind hole is for accommodating band
The turntable of dynamic radiographic source crankmotion between first position a and second position b, 11 ' b of through-hole is for accommodating and the turntable
Integrally formed shielding axis.For the ease of installing turntable, a through-hole can be opened up in the bottom of secondary shielding portion 1b, and passing through can
The cover plate lid of disassembly is together in the through-hole.
Further, shielding the opening 12 being arranged on ontology 1 can need to select to open up as round hole according to practical irradiation
It or is in slit-shaped openings.Ontology 1 is shielded because itself has adequate thickness, opening 12 can also be used as radiation source device
Collimator, for draw detection ray and to detection ray carry out shapes and sizes constraint, be collimated into ray to penetrate
Biggish sectorial area that line source is vertex, that entire detection object can be related to.It can not only guarantee that radiographic source mentions in this way
The ray of confession do not repeat, not hollow and without dead angle, and can make to detect ray and strictly be aligned with corresponding detector, improves and detects
Efficiency and the detection image quality of presentation, are detected so as to more accurately measuring targets.
Preferably, it is open for collimator and in slit-shaped, so that radiographic source is swept by the way that the ray of 12 radiation of opening is fan-shaped
Face is retouched, selects to open up angle to maximizing on shielding ontology 1, so that radiation source device is guaranteeing good shield effectiveness
While can have biggish subtended angle, that is, wider swept area is presented.
Refering to Fig. 5, shielding ontology 1 further comprises movable part 13, and movable part 13 passes through the main part in shielding ontology 1
Upper cutting is formed, and movable part 13 can perhaps be moved by the direction of close shield ontology 1 along separate to form opening 12 or closing
Opening 12.The movable part 13 can such as arc sphere made of the horizontal direction cutting of shielding ontology 1.
Further, movable part 13 can be connect with driving mechanism, from driving mechanism driving movable part 13 carry out straight line toward
Multiple movement is with main part close or far from shielding ontology 1.Movable part 13 is mobile to the main direction far from shielding ontology 1
After one pre-determined distance, slit-shaped openings 12 can be formed, the width of opening 12 is adjusted so as to the needs according to dose of radiation.
When radiation source device breaks down, movable part 13 is driven to move to the main part by close shield ontology 1 from driving mechanism, from
And in time reset movable part 13, the opening 12 of shielding ontology 1 is closed, leakage radiation accident is prevented and threatens personal peace
Entirely, the safety and reliability of radiation source device is increased.Driving mechanism can be cylinder, hydraulic cylinder, electric pushrod, gear teeth
The mechanism that strip transmission mechanism etc. can drive movable part 13 to move along a straight line, repeats no more.
Refering to Fig. 6, as an alternative embodiment, movable part 13 can also be in the perpendicular of shielding ontology 1
Be cut into fan shape (not shown) so that movable part 13 can be bonded its inclined cut face be elevated in terms of the inclined-plane or
Decentralization, depending on the radiation demand of radiating surface.
Refering to Fig. 7, as an alternative embodiment, screened room provided in an embodiment of the present invention 10 further comprises base
Seat 2, pedestal 2 have accommodating chamber 2a, and shielding ontology 1 is removably placed in accommodating chamber 2a, so that shielding ontology 1 and pedestal 2
It places close to ground together or is embedded in below ground predetermined depth and avoids opening 12.
Specifically, mounting groove 2b is provided on the side wall of accommodating chamber 2a, the section of mounting groove 2b in perpendicular is in
Step type, the shielding corresponding position of ontology 1 are provided with fixed ear 1c, and fixed ear 1c is embedded in simultaneously from the ladder type groove of mounting groove 2b
It blocks.It should be noted that the fixed form of shielding ontology 1 and pedestal 2 is not limited to this snap fit, screw can also be passed through
The modes such as fastening are connected as one.
Pedestal 2 can be made of stainless steel or armored concrete, have certain function of shielding, be convenient for pedestal 2
The screened room 10 formed with shielding ontology 1 is moved to the occasion of any needs.Since pedestal 2 can use relatively inexpensive and weight
Light material makes, so that screened room 10 be made to significantly reduce cost while meeting shield effectiveness, alleviates weight,
And it is easy to remove.
Refering to Fig. 8, the embodiment of the invention also provides a kind of radiation source devices 100 comprising foregoing any
Screened room 10 and radiographic source 20.
Radiographic source 20 is used for radiation ray.Radiographic source 20 is movably contained in the chamber 11 of shielding ontology 1.Radiographic source
Device 100 can be placed close to ground G or be placed at the following predetermined depth of ground G on the whole.Radiographic source 20 can cooperate
Detector assembly S and other image collecting devices for arranging in detection device etc. carry out safety detection to detection object.
According to an embodiment of the invention, radiographic source 20 uses isotope radioactive source, specifically, such as can be with are as follows: 60Co,
137Cs, 192Ir, 75Se, it is preferred to use 60Co, energy is high, and the relatively large angle that opening 12 can be cooperated to provide is stronger to be formed
Sectoring face, more accurately Scanning Detction, particularly suitable long-time are used for quickly detecting vehicle for measuring targets progress
It uses.
When radiographic source 20 moves to the first position a of chamber 11, ray can be outside by shielding the opening 12 of ontology 1
Radiation；When radiographic source 20 moves to the second position b of chamber 11, ray cannot pass through the outside spoke of opening 12 of shielding ontology 1
It penetrates.Since radiographic source 20 uses isotope radioactive source, small in size, light weight, the opening speed of shutter are fast, relative to previous ray
By the way that individual shutter opening or closing structure are arranged outside device in source device, can effectively improve shutter unlatching and
Closing velocity, while previous shutter opening or closing structure being avoided to give device bring impact force itself, it is penetrated to extend
The service life of source application.
Also referring to Fig. 9 and Figure 10, shields ontology 10 and be placed in ground G hereinafter, shielding 12 conduct of opening of ontology 10
Collimator uses, and the ray collimator 12 that radiographic source 20 issues can form complete shadow A and half after collimating on detector assembly S
Shadow zone B, wherein the transmitted intensity of complete shadow A is uniform, is full strength ray, and the transmitted intensity of penumbra region B is uneven, and more leans on
Proximal edge is lower, is the ray of partial intensities, therefore, should reduce penumbra region B as much as possible.The length L's and width W of opening 12
Ratio is Collimation Ratio, and Collimation Ratio is bigger, and penumbra region B is smaller.As previously mentioned, the width W of opening 12 can be according to dose of radiation
It needs to adjust, it can reduce the width of collimator, or also adjustable shielding ontology 10 is placed in ground G depth below
Degree, it can the length L for increasing opening 12 makes Collimation Ratio become larger, to make penumbra while obtaining enough complete shadow A
Area B reduces as much as possible.
Further, radiation source device 100 further includes transmission mechanism 30, and transmission mechanism 30 is connect with radiographic source 20, with band
Dynamic radiographic source 20 moves back and forth between the first position a and second position b of chamber 11.Certainly, ray can be made as needed
Source 20, which is continuously at a of first position, to carry out examined object to continue scanning, or drives radiographic source by transmission mechanism 30
20 periodically move switching between first position a and second position b, carry out compartment of terrain scanning to examined object.
As shown in figure 8, when the chamber 11 of screened room 10 is arranged via the cylindrical groove of first position a and second position b
When, transmission mechanism 30 can be straight line driving mechanism, and straight line driving mechanism drives ray by 21 (not shown) of screen bar
Source 20 carries out linear reciprocating motion along cylindrical hole.Straight line driving mechanism can for cylinder, hydraulic cylinder, electromagnet, electronic push away
Bar, gear and rack teeth mechanism etc..To guarantee stationarity and safety of the radiographic source in linear reciprocating motion, radiographic source 20 passes through
Screen bar 21 is slidably mounted in chamber 11, and to prevent ray from leaking from through-hole, screen bar 21 uses shielding material system
At.Illustratively, it is cooperatively connected by the convex jointing part that recessed socket part and screen bar 21 is arranged at the both ends of radiographic source 20, certain ray
Source 20 can also be cooperated by other connection types and screen bar 21.
Refering to fig. 11, when the chamber 11 of screened room 10 is the structure as described in Fig. 4 or Fig. 6, transmission mechanism 30 can be with
For rotating drive mechanism, chamber 11 includes 11 ' b of through-hole and blind hole 11 ' c, 11 ' c of the blind hole receiving being arranged in succession in vertical direction
Turntable 21 ' drive radiographic source crankmotion between first position a and second position b, 11 ' b of through-hole accommodate shielding
Axis 22 ' and the turntable 21 ' are integrally formed.Rotating drive mechanism includes rotating electric machine or rotating electric machine connects retarder, defeated
Shaft and shielding axis 22 ' are coaxially connected, and radiographic source 20 is installed on the one end of turntable far from the center of circle and can be embedded in 11 ' c of blind hole,
When rotating electric machine drives turntable to drive radiographic source 20 to turn to the first position a of corresponding second open-work, 11 ' a, radiographic source 20
By the 12 outside radiation rays that are open, when turning to second position b, the 12 outside radiation rays that are open cannot be passed through.To avoid penetrating
Line leaks, and turntable 21 ' is all made of shielding material with shielding axis 22 ' and is made.Certainly, the rotating drive mechanism is without being limited thereto,
As long as can be realized driving radiographic source 20 to be rotated.
Radiation source device 100 provided in an embodiment of the present invention, light weight and cost is cheap, can be applied to a plurality of types of
Security detection equipment, for being penetrated as needed to examined object (illustratively, such as vehicle or container) radiation detection
Line cooperates the detector assembly arranged in detection chambers and other image collecting devices etc. to detect detection object.
In addition, the embodiment of the invention also provides a kind of vehicle safety detection systems comprising foregoing any
Radiation source device 100 and detector assembly 200.
Detector assembly 200 and 100 device of radiographic source are correspondingly arranged to form detection zone, so that vehicle to be detected
V carries out safety inspection by the detection zone.Detector assembly 200 includes portal frame 210 and is located on portal frame 210
Multiple detector arrays 220, detector 220 can use gas ionization detector, scintillator detector or semiconductor probe
Device.Portal frame 210 is arranged corresponding to radiation source device 100 so that multiple detector arrays 220 and radiation source device 100 it
Between be capable of forming detection zone.
The fan-shaped plane distribution of detection ray that radiation source device 100 radiates, and radiation source device 100 is capable of providing at least
With 90 degree to 180 degree scanning range of detection ray.Since radiation source device 100 has bigger subtended angle, by ray
When source device 100 is placed in ground or below ground detection vehicle, make radiation source device 100 relative to the bottom of vehicle to be detected
The distance of disc portion and its interior items is closer, and wheel image is equivalent to side elevation image and non-overlapping, and what is obtained looks up detection
Image more extends, and facilitates identification and analysis of the testing staff to detection image, is set to ground relative to by detector assembly 200
Face, radiation source device 100 are set to obtained from opposite top for vertical view detection image, detection image clarity,
Increasingly there is advantage in the weight of structure entirety and the comfort level installed and used.
As previously mentioned, the shutter opening speed of radiation source device 100 is fast, and the width of opening 12 is adjustable, so that radiographic source
20 dose of radiation and radiation subtended angle can control.According to the difference of the dose of radiation of radiation source device 100, vehicle safety detection
System can have several different forms.
Refering to fig. 12, illustratively, the embodiment of the invention provides a kind of through type vehicle fast and safely detection systems
500, the shielding ontology 10 of radiation source device 100 is placed at ground G predetermined distance below.
When fast and safely detection system 500 detects vehicle to vehicle, vehicle without stopping, driver and occupant on vehicle without
It need to get off, vehicle directly passes through detection chambers with certain speed, obtains the full vehicle radiation scanning including driver and occupant
Image.The system substantially increases the detection efficiency and percent of pass of vehicle under the premise of guaranteeing passengers inside the car's radiation safety, and
Picture quality meets testing requirements.The system tested vehicle is generally such as 6~20km/h, speed by the speed of detection chambers
When lower than 6km/h, dose of radiation suffered by passengers inside the car can be higher than the standard limit in relation to human body safety check about dose of radiation, speed
When degree is higher than 20km/h, poor image quality is not able to satisfy testing requirements.When being detected with the speed, vehicle percent of pass is reachable
500 vehicle/h can meet the vehicle pass-through rate requirement of busy highway safety check bayonet, customs's clearance chamber etc., not will cause friendship
Logical congestion.
As previously mentioned, the screened room 10 in radiation source device 100 can be individually placed at ground G hereinafter, its opening 12 can
Using the collimator as big Collimation Ratio, fan-ray beam is collimated into slabbing fladellum, keeps its penumbra sector width as small as possible, together
When so that its umbra sector width and the ray incidence window width of detector assembly 200 is matched, both met as far as possible using umbra
The useful ray in area is used for scanning imagery, improves the picture quality of radiant image, and reduce the useless of penumbra region as far as possible and penetrate
Line irradiates human body, while reducing scattered ray irradiation human body, to reduce what passengers inside the car were subject in the detection process as far as possible
Dose of radiation provides technical guarantee for people Che Tongjian.
In order to reduce penumbra region as far as possible, the dose of radiation of human body is further decreased, 12 Collimation Ratio of being open can be 100
~200, the incident window width of detector array 220 can be 5-30mm.The ray for being issued radiographic source 20 using collimator is quasi-
It is directly of same size or slightly wide at the umbra sector width of each detector 220 of correspondence and the ray entrance window of the detector 220.It adopts
It is radiographic source 20 with the structure of portal frame 210, opening 12, the stability of 220 relative position of detector array provide guarantee.
On the basis of strictly being collimated to radiographic source 20, the activity of restriction radiographic source 20, for example, 0.8~8 Curie,
Dose of radiation can be then further decreased, ensure that the radiation safety of driver in tested vehicle.
Through type vehicle provided in an embodiment of the present invention fast and safely detection system 500, it is foregoing due to using
Low in cost, lighter in weight radiation source device 100, so that the overall cost of through type vehicle fast and safely detection system 11
It is greatly lowered.Meanwhile when driver drives vehicle and enters sense channel, shutter opening can be quickly controlled, to except driving
After outdoor car body and belongings carries out rapid irradiance, vehicle can be made to sail out of sense channel, simplify vehicle safety detection
The structure of equipment, improves detection efficiency.
Refering to fig. 13, it is illustratively, and preceding the embodiment of the invention also provides a kind of vehicle safety detection system 500 '
The structure for stating through type vehicle fast and safely detection system 500 is similar, the difference is that, it further include being set to radiation source device
The vehicle transportation device 110 of 100 two sides, and the dose of radiation of radiation source device 100 is higher, and detection image is relatively sharp.
When vehicle safety detection system 500 ' provided in an embodiment of the present invention works, passengers inside the car need to get off from sense channel
Outer process, vehicle V to be detected are pulled through sense channel by vehicle transportation device 110, and detection speed is generally 6~18m/min, i.e.,
0.36~1.08km/h, about 10~30 vehicles of percent of pass, detection efficiency is relatively low, and traffic particularly severe suitable for safety check is not
Too crowded place.In addition, due to using foregoing radiation source device 100 low in cost, lighter in weight, so that vehicle
The overall cost of safety detecting system 500 ' is also greatly lowered, and is conducive to promote the use of.
Although by reference to preferred embodiment, invention has been described, the case where not departing from the scope of the present invention
Under, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as there is no structures to rush
Prominent, items technical characteristic mentioned in the various embodiments can be combined in any way.The invention is not limited to texts
Disclosed in specific embodiment, but include all technical solutions falling within the scope of the claims.
Claims (12)
1. a kind of screened room (10) characterized by comprising
It shields ontology (1), there is the chamber (11) for accommodating radiographic source and the opening (12) being connected to the chamber (11), it is described
Shielding ontology (1) places close to ground or is embedded in below ground predetermined depth and avoids the opening (12), so that described
Radiographic source is directed at the opening (12) when being located at the first position (a) in the chamber (11), and by the opening (12) to
External radiation ray, the radiographic source when being located at the second position (b) in the chamber (11) cannot by the opening (12) to
External radiation ray；
Wherein, the shielding ontology (1) is divided by the horizontal plane of the first position (a) and the second position (b)
First shielding part (1a) and secondary shielding portion (1b), and the secondary shielding portion (1b) is close to ground, first shielding part
Area of section of the part of (1a) in addition to the opening (12) in any perpendicular is greater than the secondary shielding portion (1b)
Area of section in the corresponding perpendicular.
2. screened room (10) according to claim 1, which is characterized in that first shielding part (1a) is by bus (G)
Around the revolution formed after the horizontal axis (L) of the first position (a) and the second position (b) rotation predetermined angular
Body, and the revolving body is symmetrically set relative to by the perpendicular of the first position (a) and the second position (b)
It sets.
3. screened room (10) according to claim 2, which is characterized in that the bus (G) is successively to connect in the horizontal direction
1/4 circular arc, straight line and 1/4 circular arc connect, the first position (a) of the chamber (11) and one of them described 1/4 circular arc
The centre of sphere for the arc sphere being rotarily formed is overlapped, the arc that the second position (b) is rotarily formed with another described 1/4 circular arc
The centre of sphere of sphere is overlapped.
4. screened room (10) according to claim 1, which is characterized in that the chamber (11) is set as central axis process
The cylindrical groove of the first position (a) and the second position (b), and be provided on the inner peripheral surface of the cylindrical groove with
The first open-work (11a) of opening (12) connection, so as to pass through described the when the radiographic source is located at the first position (a)
One open-work (11a) and described opening (12) outside radiation ray.
5. screened room (10) according to claim 1, which is characterized in that it is successive that the chamber (11) is included in vertical direction
The through-hole (11 ' b) and blind hole (11 ' c) of setting, the diameter of the blind hole (11 ' c) are greater than the diameter of the through-hole (11 ' b), and
And second be connected to the opening (12) is provided on the step surface between the blind hole (11 ' c) and the through-hole (11 ' b)
Open-work (11 ' a), the first position (a) and the second position (b) are located in the blind hole (11 ' c), so that the ray
By second open-work (11 ' a) and described opening (12) outside radiation ray when source is located at the first position (a).
6. screened room (10) according to claim 1, which is characterized in that the shielding ontology (1) further comprises movable
Portion (13), the movable part (13) are formed by cutting in the main part of shielding ontology (1), the movable part (13)
It can be opened described in the opening (12) or closing along the direction movement far from perhaps close shielding ontology (1) with being formed
Mouth (12).
7. screened room (10) according to claim 1, wherein the opening (12) is collimator and is in slit-shaped, so that
The fan-shaped scanning surface of ray that the radiographic source passes through opening (12) radiation.
8. screened room (10) according to claim 1, which is characterized in that the screened room (10) further comprises pedestal
(2), the pedestal (2) has accommodating chamber (2a), and the shielding ontology (1) is removably placed in the accommodating chamber (2a),
So that the shielding ontology (1) and the pedestal (2) place or be embedded in close to ground together below ground predetermined depth and
Avoid the opening (12).
9. a kind of radiation source device (100) characterized by comprising
Radiographic source (20) is used for radiation ray；
Screened room (10) as claimed in any one of claims 1 to 8, the radiographic source (20) are movably contained in the shielding
In the chamber (11) of ontology (1),
Wherein, when the radiographic source (20) moves to the first position (a) of the chamber (11), the ray can lead to
The opening (12) for shielding ontology (1) is crossed to external radiation；When the radiographic source (20) moves to the chamber (11)
When the second position (b), the ray cannot be by the opening (12) of shielding ontology (1) to external radiation.
10. radiation source device (100) according to claim 9, which is characterized in that the radiographic source be isotope 60Co,
One of which in 137Cs, 192Ir, 75Se.
11. radiation source device (100) according to claim 9, which is characterized in that the radiation source device (100) is also wrapped
It includes transmission mechanism (30), the transmission mechanism (30) connect with the radiographic source (20), to drive the radiographic source (20) in institute
It states and is moved back and forth between the first position (a) and the second position (b) of chamber (11).
12. a kind of vehicle safety detection system, which is characterized in that the vehicle safety detection system includes:
Such as the described in any item radiation source devices of claim 9 to 11 (100)；With
Detector assembly (200) is correspondingly arranged to form detection zone, so that measuring car to be checked with the radiographic source (100) device
(V) passes through the detection zone and carries out safety inspection.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810433927.2A CN110459338A (en) | 2018-05-08 | 2018-05-08 | Screened room, radiation source device and vehicle safety detection system |
| PCT/CN2019/085856 WO2019214616A1 (en) | 2018-05-08 | 2019-05-07 | Shielded room, ray source device and vehicle safety detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810433927.2A CN110459338A (en) | 2018-05-08 | 2018-05-08 | Screened room, radiation source device and vehicle safety detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110459338A true CN110459338A (en) | 2019-11-15 |
Family
ID=68467814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810433927.2A Pending CN110459338A (en) | 2018-05-08 | 2018-05-08 | Screened room, radiation source device and vehicle safety detection system |
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| Country | Link |
|---|---|
| CN (1) | CN110459338A (en) |
| WO (1) | WO2019214616A1 (en) |
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| CN101349657A (en) * | 2008-09-05 | 2009-01-21 | 清华大学 | Passenger car radiation imaging detection system |
| CN107300721B (en) * | 2017-08-10 | 2023-12-15 | 苏州曼德克光电有限公司 | Ray-based three-dimensional imaging detection system for cargo vehicle |
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| US20040179647A1 (en) * | 2001-09-03 | 2004-09-16 | Jinggi Zhao | Contain inspection system using cobalt-60 gamma-ray source and cesium iodide or cadmium tungstate array detector |
| CN201311401Y (en) * | 2008-09-05 | 2009-09-16 | 清华大学 | Car radiation imaging detection system |
| CN104198507A (en) * | 2014-09-16 | 2014-12-10 | 北京一体通探测技术有限公司 | Shutter device for shielding rays and ray scanning imaging system |
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| WO2019214616A1 (en) | 2019-11-14 |
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